OMAP: add TI OMAP framebuffer driver
Imre Deak [Tue, 17 Jul 2007 11:05:54 +0000 (04:05 -0700)]
- Add Texas Instruments OMAP framebuffer driver.  This driver is being used
  for various OMAP1/2 series based boards and products e.g Nokia N800 Internet
  Tablet, H4, H3, Siemens SX1 etc.

- LCD panel registration and controller code is separated in different file
  and interfaces.

Signed-off-by: Trilok Soni <soni.trilok@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/Kconfig
drivers/video/Makefile
drivers/video/omap/Kconfig [new file with mode: 0644]
drivers/video/omap/Makefile [new file with mode: 0644]
drivers/video/omap/omapfb_main.c [new file with mode: 0644]

index 8365feb..0c5644b 100644 (file)
@@ -1820,6 +1820,10 @@ config FB_XILINX
          framebuffer. ML300 carries a 640*480 LCD display on the board,
          ML403 uses a standard DB15 VGA connector.
 
+if ARCH_OMAP
+       source "drivers/video/omap/Kconfig"
+endif
+
 config FB_VIRTUAL
        tristate "Virtual Frame Buffer support (ONLY FOR TESTING!)"
        depends on FB
index bd8b052..a562f9d 100644 (file)
@@ -113,6 +113,7 @@ obj-$(CONFIG_FB_IBM_GXT4500)          += gxt4500.o
 obj-$(CONFIG_FB_PS3)             += ps3fb.o
 obj-$(CONFIG_FB_SM501)            += sm501fb.o
 obj-$(CONFIG_FB_XILINX)           += xilinxfb.o
+obj-$(CONFIG_FB_OMAP)             += omap/
 
 # Platform or fallback drivers go here
 obj-$(CONFIG_FB_VESA)             += vesafb.o
diff --git a/drivers/video/omap/Kconfig b/drivers/video/omap/Kconfig
new file mode 100644 (file)
index 0000000..d27db84
--- /dev/null
@@ -0,0 +1,38 @@
+config FB_OMAP
+       tristate "OMAP frame buffer support (EXPERIMENTAL)"
+       depends on FB
+       select FB_CFB_FILLRECT
+       select FB_CFB_COPYAREA
+       select FB_CFB_IMAGEBLIT
+       help
+          Frame buffer driver for OMAP based boards.
+
+config FB_OMAP_BOOTLOADER_INIT
+       bool "Check bootloader initializaion"
+       depends on FB_OMAP
+       help
+         Say Y here if you want to enable checking if the bootloader has
+         already initialized the display controller. In this case the
+         driver will skip the initialization.
+
+config FB_OMAP_CONSISTENT_DMA_SIZE
+       int "Consistent DMA memory size (MB)"
+       depends on FB_OMAP
+       range 1 14
+       default 2
+       help
+         Increase the DMA consistent memory size according to your video
+         memory needs, for example if you want to use multiple planes.
+         The size must be 2MB aligned.
+         If unsure say 1.
+
+config FB_OMAP_DMA_TUNE
+        bool "Set DMA SDRAM access priority high"
+        depends on FB_OMAP && ARCH_OMAP1
+        help
+          On systems in which video memory is in system memory
+          (SDRAM) this will speed up graphics DMA operations.
+          If you have such a system and want to use rotation
+          answer yes. Answer no if you have a dedicated video
+          memory, or don't use any of the accelerated features.
+
diff --git a/drivers/video/omap/Makefile b/drivers/video/omap/Makefile
new file mode 100644 (file)
index 0000000..5aa7175
--- /dev/null
@@ -0,0 +1,10 @@
+#
+# Makefile for the new OMAP framebuffer device driver
+#
+
+obj-$(CONFIG_FB_OMAP) += omapfb.o
+
+objs-yy := omapfb_main.o
+
+omapfb-objs := $(objs-yy)
+
diff --git a/drivers/video/omap/omapfb_main.c b/drivers/video/omap/omapfb_main.c
new file mode 100644 (file)
index 0000000..14d0f7a
--- /dev/null
@@ -0,0 +1,1941 @@
+/*
+ * Framebuffer driver for TI OMAP boards
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Author: Imre Deak <imre.deak@nokia.com>
+ *
+ * Acknowledgements:
+ *   Alex McMains <aam@ridgerun.com>       - Original driver
+ *   Juha Yrjola <juha.yrjola@nokia.com>   - Original driver and improvements
+ *   Dirk Behme <dirk.behme@de.bosch.com>  - changes for 2.6 kernel API
+ *   Texas Instruments                     - H3 support
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+
+#include <asm/mach-types.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/omapfb.h>
+
+#define MODULE_NAME    "omapfb"
+
+static unsigned int    def_accel;
+static unsigned long   def_vram[OMAPFB_PLANE_NUM];
+static int             def_vram_cnt;
+static unsigned long   def_vxres;
+static unsigned long   def_vyres;
+static unsigned int    def_rotate;
+static unsigned int    def_mirror;
+
+#ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
+static int             manual_update = 1;
+#else
+static int             manual_update;
+#endif
+
+static struct platform_device  *fbdev_pdev;
+static struct lcd_panel                *fbdev_panel;
+static struct omapfb_device    *omapfb_dev;
+
+struct caps_table_struct {
+       unsigned long flag;
+       const char *name;
+};
+
+static struct caps_table_struct ctrl_caps[] = {
+       { OMAPFB_CAPS_MANUAL_UPDATE,  "manual update" },
+       { OMAPFB_CAPS_TEARSYNC,       "tearing synchronization" },
+       { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
+       { OMAPFB_CAPS_PLANE_SCALE,    "scale plane" },
+       { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
+       { OMAPFB_CAPS_WINDOW_SCALE,   "scale window" },
+       { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
+       { OMAPFB_CAPS_SET_BACKLIGHT,  "backlight setting" },
+};
+
+static struct caps_table_struct color_caps[] = {
+       { 1 << OMAPFB_COLOR_RGB565,     "RGB565", },
+       { 1 << OMAPFB_COLOR_YUV422,     "YUV422", },
+       { 1 << OMAPFB_COLOR_YUV420,     "YUV420", },
+       { 1 << OMAPFB_COLOR_CLUT_8BPP,  "CLUT8", },
+       { 1 << OMAPFB_COLOR_CLUT_4BPP,  "CLUT4", },
+       { 1 << OMAPFB_COLOR_CLUT_2BPP,  "CLUT2", },
+       { 1 << OMAPFB_COLOR_CLUT_1BPP,  "CLUT1", },
+       { 1 << OMAPFB_COLOR_RGB444,     "RGB444", },
+       { 1 << OMAPFB_COLOR_YUY422,     "YUY422", },
+};
+
+/*
+ * ---------------------------------------------------------------------------
+ * LCD panel
+ * ---------------------------------------------------------------------------
+ */
+extern struct lcd_ctrl omap1_int_ctrl;
+extern struct lcd_ctrl omap2_int_ctrl;
+extern struct lcd_ctrl hwa742_ctrl;
+extern struct lcd_ctrl blizzard_ctrl;
+
+static struct lcd_ctrl *ctrls[] = {
+#ifdef CONFIG_ARCH_OMAP1
+       &omap1_int_ctrl,
+#else
+       &omap2_int_ctrl,
+#endif
+
+#ifdef CONFIG_FB_OMAP_LCDC_HWA742
+       &hwa742_ctrl,
+#endif
+#ifdef CONFIG_FB_OMAP_LCDC_BLIZZARD
+       &blizzard_ctrl,
+#endif
+};
+
+#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
+#ifdef CONFIG_ARCH_OMAP1
+extern struct lcd_ctrl_extif omap1_ext_if;
+#else
+extern struct lcd_ctrl_extif omap2_ext_if;
+#endif
+#endif
+
+static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
+{
+       mutex_lock(&fbdev->rqueue_mutex);
+}
+
+static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
+{
+       mutex_unlock(&fbdev->rqueue_mutex);
+}
+
+/*
+ * ---------------------------------------------------------------------------
+ * LCD controller and LCD DMA
+ * ---------------------------------------------------------------------------
+ */
+/* Lookup table to map elem size to elem type. */
+static const int dma_elem_type[] = {
+       0,
+       OMAP_DMA_DATA_TYPE_S8,
+       OMAP_DMA_DATA_TYPE_S16,
+       0,
+       OMAP_DMA_DATA_TYPE_S32,
+};
+
+/*
+ * Allocate resources needed for LCD controller and LCD DMA operations. Video
+ * memory is allocated from system memory according to the virtual display
+ * size, except if a bigger memory size is specified explicitly as a kernel
+ * parameter.
+ */
+static int ctrl_init(struct omapfb_device *fbdev)
+{
+       int r;
+       int i;
+
+       /* kernel/module vram parameters override boot tags/board config */
+       if (def_vram_cnt) {
+               for (i = 0; i < def_vram_cnt; i++)
+                       fbdev->mem_desc.region[i].size =
+                               PAGE_ALIGN(def_vram[i]);
+               fbdev->mem_desc.region_cnt = i;
+       } else {
+               struct omapfb_platform_data *conf;
+
+               conf = fbdev->dev->platform_data;
+               fbdev->mem_desc = conf->mem_desc;
+       }
+
+       if (!fbdev->mem_desc.region_cnt) {
+               struct lcd_panel *panel = fbdev->panel;
+               int def_size;
+               int bpp = panel->bpp;
+
+               /* 12 bpp is packed in 16 bits */
+               if (bpp == 12)
+                       bpp = 16;
+               def_size = def_vxres * def_vyres * bpp / 8;
+               fbdev->mem_desc.region_cnt = 1;
+               fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
+       }
+       r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
+       if (r < 0) {
+               dev_err(fbdev->dev, "controller initialization failed (%d)\n",
+                       r);
+               return r;
+       }
+
+#ifdef DEBUG
+       for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
+               dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
+                        i,
+                        fbdev->mem_desc.region[i].paddr,
+                        fbdev->mem_desc.region[i].vaddr,
+                        fbdev->mem_desc.region[i].size);
+       }
+#endif
+       return 0;
+}
+
+static void ctrl_cleanup(struct omapfb_device *fbdev)
+{
+       fbdev->ctrl->cleanup();
+}
+
+/* Must be called with fbdev->rqueue_mutex held. */
+static int ctrl_change_mode(struct fb_info *fbi)
+{
+       int r;
+       unsigned long offset;
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct fb_var_screeninfo *var = &fbi->var;
+
+       offset = var->yoffset * fbi->fix.line_length +
+                var->xoffset * var->bits_per_pixel / 8;
+
+       if (fbdev->ctrl->sync)
+               fbdev->ctrl->sync();
+       r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
+                                offset, var->xres_virtual,
+                                plane->info.pos_x, plane->info.pos_y,
+                                var->xres, var->yres, plane->color_mode);
+       if (fbdev->ctrl->set_scale != NULL)
+               r = fbdev->ctrl->set_scale(plane->idx,
+                                  var->xres, var->yres,
+                                  plane->info.out_width,
+                                  plane->info.out_height);
+
+       return r;
+}
+
+/*
+ * ---------------------------------------------------------------------------
+ * fbdev framework callbacks and the ioctl interface
+ * ---------------------------------------------------------------------------
+ */
+/* Called each time the omapfb device is opened */
+static int omapfb_open(struct fb_info *info, int user)
+{
+       return 0;
+}
+
+static void omapfb_sync(struct fb_info *info);
+
+/* Called when the omapfb device is closed. We make sure that any pending
+ * gfx DMA operations are ended, before we return. */
+static int omapfb_release(struct fb_info *info, int user)
+{
+       omapfb_sync(info);
+       return 0;
+}
+
+/* Store a single color palette entry into a pseudo palette or the hardware
+ * palette if one is available. For now we support only 16bpp and thus store
+ * the entry only to the pseudo palette.
+ */
+static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
+                       u_int blue, u_int transp, int update_hw_pal)
+{
+       struct omapfb_plane_struct *plane = info->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct fb_var_screeninfo *var = &info->var;
+       int r = 0;
+
+       switch (plane->color_mode) {
+       case OMAPFB_COLOR_YUV422:
+       case OMAPFB_COLOR_YUV420:
+       case OMAPFB_COLOR_YUY422:
+               r = -EINVAL;
+               break;
+       case OMAPFB_COLOR_CLUT_8BPP:
+       case OMAPFB_COLOR_CLUT_4BPP:
+       case OMAPFB_COLOR_CLUT_2BPP:
+       case OMAPFB_COLOR_CLUT_1BPP:
+               if (fbdev->ctrl->setcolreg)
+                       r = fbdev->ctrl->setcolreg(regno, red, green, blue,
+                                                       transp, update_hw_pal);
+               /* Fallthrough */
+       case OMAPFB_COLOR_RGB565:
+       case OMAPFB_COLOR_RGB444:
+               if (r != 0)
+                       break;
+
+               if (regno < 0) {
+                       r = -EINVAL;
+                       break;
+               }
+
+               if (regno < 16) {
+                       u16 pal;
+                       pal = ((red >> (16 - var->red.length)) <<
+                                       var->red.offset) |
+                             ((green >> (16 - var->green.length)) <<
+                                       var->green.offset) |
+                             (blue >> (16 - var->blue.length));
+                       ((u32 *)(info->pseudo_palette))[regno] = pal;
+               }
+               break;
+       default:
+               BUG();
+       }
+       return r;
+}
+
+static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+                           u_int transp, struct fb_info *info)
+{
+       return _setcolreg(info, regno, red, green, blue, transp, 1);
+}
+
+static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
+{
+       int count, index, r;
+       u16 *red, *green, *blue, *transp;
+       u16 trans = 0xffff;
+
+       red     = cmap->red;
+       green   = cmap->green;
+       blue    = cmap->blue;
+       transp  = cmap->transp;
+       index   = cmap->start;
+
+       for (count = 0; count < cmap->len; count++) {
+               if (transp)
+                       trans = *transp++;
+               r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
+                               count == cmap->len - 1);
+               if (r != 0)
+                       return r;
+       }
+
+       return 0;
+}
+
+static int omapfb_update_full_screen(struct fb_info *fbi);
+
+static int omapfb_blank(int blank, struct fb_info *fbi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       int do_update = 0;
+       int r = 0;
+
+       omapfb_rqueue_lock(fbdev);
+       switch (blank) {
+       case VESA_NO_BLANKING:
+               if (fbdev->state == OMAPFB_SUSPENDED) {
+                       if (fbdev->ctrl->resume)
+                               fbdev->ctrl->resume();
+                       fbdev->panel->enable(fbdev->panel);
+                       fbdev->state = OMAPFB_ACTIVE;
+                       if (fbdev->ctrl->get_update_mode() ==
+                                       OMAPFB_MANUAL_UPDATE)
+                               do_update = 1;
+               }
+               break;
+       case VESA_POWERDOWN:
+               if (fbdev->state == OMAPFB_ACTIVE) {
+                       fbdev->panel->disable(fbdev->panel);
+                       if (fbdev->ctrl->suspend)
+                               fbdev->ctrl->suspend();
+                       fbdev->state = OMAPFB_SUSPENDED;
+               }
+               break;
+       default:
+               r = -EINVAL;
+       }
+       omapfb_rqueue_unlock(fbdev);
+
+       if (r == 0 && do_update)
+               r = omapfb_update_full_screen(fbi);
+
+       return r;
+}
+
+static void omapfb_sync(struct fb_info *fbi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+
+       omapfb_rqueue_lock(fbdev);
+       if (fbdev->ctrl->sync)
+               fbdev->ctrl->sync();
+       omapfb_rqueue_unlock(fbdev);
+}
+
+/*
+ * Set fb_info.fix fields and also updates fbdev.
+ * When calling this fb_info.var must be set up already.
+ */
+static void set_fb_fix(struct fb_info *fbi)
+{
+       struct fb_fix_screeninfo *fix = &fbi->fix;
+       struct fb_var_screeninfo *var = &fbi->var;
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_mem_region *rg;
+       int bpp;
+
+       rg = &plane->fbdev->mem_desc.region[plane->idx];
+       fbi->screen_base        = (char __iomem *)rg->vaddr;
+       fix->smem_start         = rg->paddr;
+       fix->smem_len           = rg->size;
+
+       fix->type = FB_TYPE_PACKED_PIXELS;
+       bpp = var->bits_per_pixel;
+       if (var->nonstd)
+               fix->visual = FB_VISUAL_PSEUDOCOLOR;
+       else switch (var->bits_per_pixel) {
+       case 16:
+       case 12:
+               fix->visual = FB_VISUAL_TRUECOLOR;
+               /* 12bpp is stored in 16 bits */
+               bpp = 16;
+               break;
+       case 1:
+       case 2:
+       case 4:
+       case 8:
+               fix->visual = FB_VISUAL_PSEUDOCOLOR;
+               break;
+       }
+       fix->accel              = FB_ACCEL_OMAP1610;
+       fix->line_length        = var->xres_virtual * bpp / 8;
+}
+
+static int set_color_mode(struct omapfb_plane_struct *plane,
+                         struct fb_var_screeninfo *var)
+{
+       switch (var->nonstd) {
+       case 0:
+               break;
+       case OMAPFB_COLOR_YUV422:
+               var->bits_per_pixel = 16;
+               plane->color_mode = var->nonstd;
+               return 0;
+       case OMAPFB_COLOR_YUV420:
+               var->bits_per_pixel = 12;
+               plane->color_mode = var->nonstd;
+               return 0;
+       case OMAPFB_COLOR_YUY422:
+               var->bits_per_pixel = 16;
+               plane->color_mode = var->nonstd;
+               return 0;
+       default:
+               return -EINVAL;
+       }
+
+       switch (var->bits_per_pixel) {
+       case 1:
+               plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
+               return 0;
+       case 2:
+               plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
+               return 0;
+       case 4:
+               plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
+               return 0;
+       case 8:
+               plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
+               return 0;
+       case 12:
+               var->bits_per_pixel = 16;
+               plane->color_mode = OMAPFB_COLOR_RGB444;
+               return 0;
+       case 16:
+               plane->color_mode = OMAPFB_COLOR_RGB565;
+               return 0;
+       default:
+               return -EINVAL;
+       }
+}
+
+/*
+ * Check the values in var against our capabilities and in case of out of
+ * bound values try to adjust them.
+ */
+static int set_fb_var(struct fb_info *fbi,
+                     struct fb_var_screeninfo *var)
+{
+       int             bpp;
+       unsigned long   max_frame_size;
+       unsigned long   line_size;
+       int             xres_min, xres_max;
+       int             yres_min, yres_max;
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct lcd_panel *panel = fbdev->panel;
+
+       if (set_color_mode(plane, var) < 0)
+               return -EINVAL;
+
+       bpp = var->bits_per_pixel;
+       if (plane->color_mode == OMAPFB_COLOR_RGB444)
+               bpp = 16;
+
+       switch (var->rotate) {
+       case 0:
+       case 180:
+               xres_min = OMAPFB_PLANE_XRES_MIN;
+               xres_max = panel->x_res;
+               yres_min = OMAPFB_PLANE_YRES_MIN;
+               yres_max = panel->y_res;
+               if (cpu_is_omap15xx()) {
+                       var->xres = panel->x_res;
+                       var->yres = panel->y_res;
+               }
+               break;
+       case 90:
+       case 270:
+               xres_min = OMAPFB_PLANE_YRES_MIN;
+               xres_max = panel->y_res;
+               yres_min = OMAPFB_PLANE_XRES_MIN;
+               yres_max = panel->x_res;
+               if (cpu_is_omap15xx()) {
+                       var->xres = panel->y_res;
+                       var->yres = panel->x_res;
+               }
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       if (var->xres < xres_min)
+               var->xres = xres_min;
+       if (var->yres < yres_min)
+               var->yres = yres_min;
+       if (var->xres > xres_max)
+               var->xres = xres_max;
+       if (var->yres > yres_max)
+               var->yres = yres_max;
+
+       if (var->xres_virtual < var->xres)
+               var->xres_virtual = var->xres;
+       if (var->yres_virtual < var->yres)
+               var->yres_virtual = var->yres;
+       max_frame_size = fbdev->mem_desc.region[plane->idx].size;
+       line_size = var->xres_virtual * bpp / 8;
+       if (line_size * var->yres_virtual > max_frame_size) {
+               /* Try to keep yres_virtual first */
+               line_size = max_frame_size / var->yres_virtual;
+               var->xres_virtual = line_size * 8 / bpp;
+               if (var->xres_virtual < var->xres) {
+                       /* Still doesn't fit. Shrink yres_virtual too */
+                       var->xres_virtual = var->xres;
+                       line_size = var->xres * bpp / 8;
+                       var->yres_virtual = max_frame_size / line_size;
+               }
+               /* Recheck this, as the virtual size changed. */
+               if (var->xres_virtual < var->xres)
+                       var->xres = var->xres_virtual;
+               if (var->yres_virtual < var->yres)
+                       var->yres = var->yres_virtual;
+               if (var->xres < xres_min || var->yres < yres_min)
+                       return -EINVAL;
+       }
+       if (var->xres + var->xoffset > var->xres_virtual)
+               var->xoffset = var->xres_virtual - var->xres;
+       if (var->yres + var->yoffset > var->yres_virtual)
+               var->yoffset = var->yres_virtual - var->yres;
+       line_size = var->xres * bpp / 8;
+
+       if (plane->color_mode == OMAPFB_COLOR_RGB444) {
+               var->red.offset   = 8; var->red.length   = 4;
+                                               var->red.msb_right   = 0;
+               var->green.offset = 4; var->green.length = 4;
+                                               var->green.msb_right = 0;
+               var->blue.offset  = 0; var->blue.length  = 4;
+                                               var->blue.msb_right  = 0;
+       } else {
+               var->red.offset  = 11; var->red.length   = 5;
+                                               var->red.msb_right   = 0;
+               var->green.offset = 5;  var->green.length = 6;
+                                               var->green.msb_right = 0;
+               var->blue.offset = 0;  var->blue.length  = 5;
+                                               var->blue.msb_right  = 0;
+       }
+
+       var->height             = -1;
+       var->width              = -1;
+       var->grayscale          = 0;
+
+       /* pixclock in ps, the rest in pixclock */
+       var->pixclock           = 10000000 / (panel->pixel_clock / 100);
+       var->left_margin        = panel->hfp;
+       var->right_margin       = panel->hbp;
+       var->upper_margin       = panel->vfp;
+       var->lower_margin       = panel->vbp;
+       var->hsync_len          = panel->hsw;
+       var->vsync_len          = panel->vsw;
+
+       /* TODO: get these from panel->config */
+       var->vmode              = FB_VMODE_NONINTERLACED;
+       var->sync               = 0;
+
+       return 0;
+}
+
+
+/* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
+static void omapfb_rotate(struct fb_info *fbi, int rotate)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+
+       omapfb_rqueue_lock(fbdev);
+       if (cpu_is_omap15xx() && rotate != fbi->var.rotate) {
+               struct fb_var_screeninfo *new_var = &fbdev->new_var;
+
+               memcpy(new_var, &fbi->var, sizeof(*new_var));
+               new_var->rotate = rotate;
+               if (set_fb_var(fbi, new_var) == 0 &&
+                   memcmp(new_var, &fbi->var, sizeof(*new_var))) {
+                       memcpy(&fbi->var, new_var, sizeof(*new_var));
+                       ctrl_change_mode(fbi);
+               }
+       }
+       omapfb_rqueue_unlock(fbdev);
+}
+
+/*
+ * Set new x,y offsets in the virtual display for the visible area and switch
+ * to the new mode.
+ */
+static int omapfb_pan_display(struct fb_var_screeninfo *var,
+                              struct fb_info *fbi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       int r = 0;
+
+       omapfb_rqueue_lock(fbdev);
+       if (var->xoffset != fbi->var.xoffset ||
+           var->yoffset != fbi->var.yoffset) {
+               struct fb_var_screeninfo *new_var = &fbdev->new_var;
+
+               memcpy(new_var, &fbi->var, sizeof(*new_var));
+               new_var->xoffset = var->xoffset;
+               new_var->yoffset = var->yoffset;
+               if (set_fb_var(fbi, new_var))
+                       r = -EINVAL;
+               else {
+                       memcpy(&fbi->var, new_var, sizeof(*new_var));
+                       ctrl_change_mode(fbi);
+               }
+       }
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+/* Set mirror to vertical axis and switch to the new mode. */
+static int omapfb_mirror(struct fb_info *fbi, int mirror)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       int r = 0;
+
+       omapfb_rqueue_lock(fbdev);
+       mirror = mirror ? 1 : 0;
+       if (cpu_is_omap15xx())
+               r = -EINVAL;
+       else if (mirror != plane->info.mirror) {
+               plane->info.mirror = mirror;
+               r = ctrl_change_mode(fbi);
+       }
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+/*
+ * Check values in var, try to adjust them in case of out of bound values if
+ * possible, or return error.
+ */
+static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       int r;
+
+       omapfb_rqueue_lock(fbdev);
+       if (fbdev->ctrl->sync != NULL)
+               fbdev->ctrl->sync();
+       r = set_fb_var(fbi, var);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+/*
+ * Switch to a new mode. The parameters for it has been check already by
+ * omapfb_check_var.
+ */
+static int omapfb_set_par(struct fb_info *fbi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       int r = 0;
+
+       omapfb_rqueue_lock(fbdev);
+       set_fb_fix(fbi);
+       r = ctrl_change_mode(fbi);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+int omapfb_update_window_async(struct fb_info *fbi,
+                               struct omapfb_update_window *win,
+                               void (*callback)(void *),
+                               void *callback_data)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct fb_var_screeninfo *var;
+
+       var = &fbi->var;
+       if (win->x >= var->xres || win->y >= var->yres ||
+           win->out_x > var->xres || win->out_y >= var->yres)
+               return -EINVAL;
+
+       if (!fbdev->ctrl->update_window ||
+           fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
+               return -ENODEV;
+
+       if (win->x + win->width >= var->xres)
+               win->width = var->xres - win->x;
+       if (win->y + win->height >= var->yres)
+               win->height = var->yres - win->y;
+       /* The out sizes should be cropped to the LCD size */
+       if (win->out_x + win->out_width > fbdev->panel->x_res)
+               win->out_width = fbdev->panel->x_res - win->out_x;
+       if (win->out_y + win->out_height > fbdev->panel->y_res)
+               win->out_height = fbdev->panel->y_res - win->out_y;
+       if (!win->width || !win->height || !win->out_width || !win->out_height)
+               return 0;
+
+       return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
+}
+EXPORT_SYMBOL(omapfb_update_window_async);
+
+static int omapfb_update_win(struct fb_info *fbi,
+                               struct omapfb_update_window *win)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       int ret;
+
+       omapfb_rqueue_lock(plane->fbdev);
+       ret = omapfb_update_window_async(fbi, win, NULL, 0);
+       omapfb_rqueue_unlock(plane->fbdev);
+
+       return ret;
+}
+
+static int omapfb_update_full_screen(struct fb_info *fbi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct omapfb_update_window win;
+       int r;
+
+       if (!fbdev->ctrl->update_window ||
+           fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
+               return -ENODEV;
+
+       win.x = 0;
+       win.y = 0;
+       win.width = fbi->var.xres;
+       win.height = fbi->var.yres;
+       win.out_x = 0;
+       win.out_y = 0;
+       win.out_width = fbi->var.xres;
+       win.out_height = fbi->var.yres;
+       win.format = 0;
+
+       omapfb_rqueue_lock(fbdev);
+       r = fbdev->ctrl->update_window(fbi, &win, NULL, 0);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct lcd_panel *panel = fbdev->panel;
+       struct omapfb_plane_info old_info;
+       int r = 0;
+
+       if (pi->pos_x + pi->out_width > panel->x_res ||
+           pi->pos_y + pi->out_height > panel->y_res)
+               return -EINVAL;
+
+       omapfb_rqueue_lock(fbdev);
+       if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
+               /*
+                * This plane's memory was freed, can't enable it
+                * until it's reallocated.
+                */
+               r = -EINVAL;
+               goto out;
+       }
+       old_info = plane->info;
+       plane->info = *pi;
+       if (pi->enabled) {
+               r = ctrl_change_mode(fbi);
+               if (r < 0) {
+                       plane->info = old_info;
+                       goto out;
+               }
+       }
+       r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
+       if (r < 0) {
+               plane->info = old_info;
+               goto out;
+       }
+out:
+       omapfb_rqueue_unlock(fbdev);
+       return r;
+}
+
+static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+
+       *pi = plane->info;
+       return 0;
+}
+
+static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
+       size_t size;
+       int r = 0;
+
+       if (fbdev->ctrl->setup_mem == NULL)
+               return -ENODEV;
+       if (mi->type > OMAPFB_MEMTYPE_MAX)
+               return -EINVAL;
+
+       size = PAGE_ALIGN(mi->size);
+       omapfb_rqueue_lock(fbdev);
+       if (plane->info.enabled) {
+               r = -EBUSY;
+               goto out;
+       }
+       if (rg->size != size || rg->type != mi->type) {
+               struct fb_var_screeninfo *new_var = &fbdev->new_var;
+               unsigned long old_size = rg->size;
+               u8            old_type = rg->type;
+               unsigned long paddr;
+
+               rg->size = size;
+               rg->type = mi->type;
+               /*
+                * size == 0 is a special case, for which we
+                * don't check / adjust the screen parameters.
+                * This isn't a problem since the plane can't
+                * be reenabled unless its size is > 0.
+                */
+               if (old_size != size && size) {
+                       if (size) {
+                               memcpy(new_var, &fbi->var, sizeof(*new_var));
+                               r = set_fb_var(fbi, new_var);
+                               if (r < 0)
+                                       goto out;
+                       }
+               }
+
+               if (fbdev->ctrl->sync)
+                       fbdev->ctrl->sync();
+               r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
+               if (r < 0) {
+                       /* Revert changes. */
+                       rg->size = old_size;
+                       rg->type = old_type;
+                       goto out;
+               }
+               rg->paddr = paddr;
+
+               if (old_size != size) {
+                       if (size) {
+                               memcpy(&fbi->var, new_var, sizeof(fbi->var));
+                               set_fb_fix(fbi);
+                       } else {
+                               /*
+                                * Set these explicitly to indicate that the
+                                * plane memory is dealloce'd, the other
+                                * screen parameters in var / fix are invalid.
+                                */
+                               fbi->fix.smem_start = 0;
+                               fbi->fix.smem_len = 0;
+                       }
+               }
+       }
+out:
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       struct omapfb_mem_region *rg;
+
+       rg = &fbdev->mem_desc.region[plane->idx];
+       memset(mi, 0, sizeof(*mi));
+       mi->size = rg->size;
+       mi->type = rg->type;
+
+       return 0;
+}
+
+static int omapfb_set_color_key(struct omapfb_device *fbdev,
+                               struct omapfb_color_key *ck)
+{
+       int r;
+
+       if (!fbdev->ctrl->set_color_key)
+               return -ENODEV;
+
+       omapfb_rqueue_lock(fbdev);
+       r = fbdev->ctrl->set_color_key(ck);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+static int omapfb_get_color_key(struct omapfb_device *fbdev,
+                               struct omapfb_color_key *ck)
+{
+       int r;
+
+       if (!fbdev->ctrl->get_color_key)
+               return -ENODEV;
+
+       omapfb_rqueue_lock(fbdev);
+       r = fbdev->ctrl->get_color_key(ck);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
+static int notifier_inited;
+
+static void omapfb_init_notifier(void)
+{
+       int i;
+
+       for (i = 0; i < OMAPFB_PLANE_NUM; i++)
+               BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
+}
+
+int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
+                               omapfb_notifier_callback_t callback,
+                               void *callback_data)
+{
+       int r;
+
+       if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
+               return -EINVAL;
+
+       if (!notifier_inited) {
+               omapfb_init_notifier();
+               notifier_inited = 1;
+       }
+
+       omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
+                                       unsigned long, void *))callback;
+       omapfb_nb->data = callback_data;
+       r = blocking_notifier_chain_register(
+                               &omapfb_client_list[omapfb_nb->plane_idx],
+                               &omapfb_nb->nb);
+       if (r)
+               return r;
+       if (omapfb_dev != NULL &&
+           omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
+               omapfb_dev->ctrl->bind_client(omapfb_nb);
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL(omapfb_register_client);
+
+int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
+{
+       return blocking_notifier_chain_unregister(
+               &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
+}
+EXPORT_SYMBOL(omapfb_unregister_client);
+
+void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
+{
+       int i;
+
+       if (!notifier_inited)
+               /* no client registered yet */
+               return;
+
+       for (i = 0; i < OMAPFB_PLANE_NUM; i++)
+               blocking_notifier_call_chain(&omapfb_client_list[i], event,
+                                   fbdev->fb_info[i]);
+}
+EXPORT_SYMBOL(omapfb_notify_clients);
+
+static int omapfb_set_update_mode(struct omapfb_device *fbdev,
+                                  enum omapfb_update_mode mode)
+{
+       int r;
+
+       omapfb_rqueue_lock(fbdev);
+       r = fbdev->ctrl->set_update_mode(mode);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
+{
+       int r;
+
+       omapfb_rqueue_lock(fbdev);
+       r = fbdev->ctrl->get_update_mode();
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
+                                    struct omapfb_caps *caps)
+{
+       memset(caps, 0, sizeof(*caps));
+       fbdev->ctrl->get_caps(plane, caps);
+       caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
+}
+
+/* For lcd testing */
+void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
+{
+       omapfb_rqueue_lock(fbdev);
+       *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
+       if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
+               struct omapfb_update_window win;
+
+               memset(&win, 0, sizeof(win));
+               win.width = 2;
+               win.height = 2;
+               win.out_width = 2;
+               win.out_height = 2;
+               fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, 0);
+       }
+       omapfb_rqueue_unlock(fbdev);
+}
+EXPORT_SYMBOL(omapfb_write_first_pixel);
+
+/*
+ * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
+ * here to be accessible by user mode code.
+ */
+static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
+                       unsigned long arg)
+{
+       struct omapfb_plane_struct *plane = fbi->par;
+       struct omapfb_device    *fbdev = plane->fbdev;
+       struct fb_ops           *ops = fbi->fbops;
+       union {
+               struct omapfb_update_window     update_window;
+               struct omapfb_plane_info        plane_info;
+               struct omapfb_mem_info          mem_info;
+               struct omapfb_color_key         color_key;
+               enum omapfb_update_mode         update_mode;
+               struct omapfb_caps              caps;
+               unsigned int            mirror;
+               int                     plane_out;
+               int                     enable_plane;
+       } p;
+       int r = 0;
+
+       BUG_ON(!ops);
+       switch (cmd) {
+       case OMAPFB_MIRROR:
+               if (get_user(p.mirror, (int __user *)arg))
+                       r = -EFAULT;
+               else
+                       omapfb_mirror(fbi, p.mirror);
+               break;
+       case OMAPFB_SYNC_GFX:
+               omapfb_sync(fbi);
+               break;
+       case OMAPFB_VSYNC:
+               break;
+       case OMAPFB_SET_UPDATE_MODE:
+               if (get_user(p.update_mode, (int __user *)arg))
+                       r = -EFAULT;
+               else
+                       r = omapfb_set_update_mode(fbdev, p.update_mode);
+               break;
+       case OMAPFB_GET_UPDATE_MODE:
+               p.update_mode = omapfb_get_update_mode(fbdev);
+               if (put_user(p.update_mode,
+                                       (enum omapfb_update_mode __user *)arg))
+                       r = -EFAULT;
+               break;
+       case OMAPFB_UPDATE_WINDOW_OLD:
+               if (copy_from_user(&p.update_window, (void __user *)arg,
+                                  sizeof(struct omapfb_update_window_old)))
+                       r = -EFAULT;
+               else {
+                       struct omapfb_update_window *u = &p.update_window;
+                       u->out_x = u->x;
+                       u->out_y = u->y;
+                       u->out_width = u->width;
+                       u->out_height = u->height;
+                       memset(u->reserved, 0, sizeof(u->reserved));
+                       r = omapfb_update_win(fbi, u);
+               }
+               break;
+       case OMAPFB_UPDATE_WINDOW:
+               if (copy_from_user(&p.update_window, (void __user *)arg,
+                                  sizeof(p.update_window)))
+                       r = -EFAULT;
+               else
+                       r = omapfb_update_win(fbi, &p.update_window);
+               break;
+       case OMAPFB_SETUP_PLANE:
+               if (copy_from_user(&p.plane_info, (void __user *)arg,
+                                  sizeof(p.plane_info)))
+                       r = -EFAULT;
+               else
+                       r = omapfb_setup_plane(fbi, &p.plane_info);
+               break;
+       case OMAPFB_QUERY_PLANE:
+               if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
+                       break;
+               if (copy_to_user((void __user *)arg, &p.plane_info,
+                                  sizeof(p.plane_info)))
+                       r = -EFAULT;
+               break;
+       case OMAPFB_SETUP_MEM:
+               if (copy_from_user(&p.mem_info, (void __user *)arg,
+                                  sizeof(p.mem_info)))
+                       r = -EFAULT;
+               else
+                       r = omapfb_setup_mem(fbi, &p.mem_info);
+               break;
+       case OMAPFB_QUERY_MEM:
+               if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
+                       break;
+               if (copy_to_user((void __user *)arg, &p.mem_info,
+                                  sizeof(p.mem_info)))
+                       r = -EFAULT;
+               break;
+       case OMAPFB_SET_COLOR_KEY:
+               if (copy_from_user(&p.color_key, (void __user *)arg,
+                                  sizeof(p.color_key)))
+                       r = -EFAULT;
+               else
+                       r = omapfb_set_color_key(fbdev, &p.color_key);
+               break;
+       case OMAPFB_GET_COLOR_KEY:
+               if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
+                       break;
+               if (copy_to_user((void __user *)arg, &p.color_key,
+                                sizeof(p.color_key)))
+                       r = -EFAULT;
+               break;
+       case OMAPFB_GET_CAPS:
+               omapfb_get_caps(fbdev, plane->idx, &p.caps);
+               if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
+                       r = -EFAULT;
+               break;
+       case OMAPFB_LCD_TEST:
+               {
+                       int test_num;
+
+                       if (get_user(test_num, (int __user *)arg)) {
+                               r = -EFAULT;
+                               break;
+                       }
+                       if (!fbdev->panel->run_test) {
+                               r = -EINVAL;
+                               break;
+                       }
+                       r = fbdev->panel->run_test(fbdev->panel, test_num);
+                       break;
+               }
+       case OMAPFB_CTRL_TEST:
+               {
+                       int test_num;
+
+                       if (get_user(test_num, (int __user *)arg)) {
+                               r = -EFAULT;
+                               break;
+                       }
+                       if (!fbdev->ctrl->run_test) {
+                               r = -EINVAL;
+                               break;
+                       }
+                       r = fbdev->ctrl->run_test(test_num);
+                       break;
+               }
+       default:
+               r = -EINVAL;
+       }
+
+       return r;
+}
+
+static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+       struct omapfb_plane_struct *plane = info->par;
+       struct omapfb_device *fbdev = plane->fbdev;
+       int r;
+
+       omapfb_rqueue_lock(fbdev);
+       r = fbdev->ctrl->mmap(info, vma);
+       omapfb_rqueue_unlock(fbdev);
+
+       return r;
+}
+
+/*
+ * Callback table for the frame buffer framework. Some of these pointers
+ * will be changed according to the current setting of fb_info->accel_flags.
+ */
+static struct fb_ops omapfb_ops = {
+       .owner          = THIS_MODULE,
+       .fb_open        = omapfb_open,
+       .fb_release     = omapfb_release,
+       .fb_setcolreg   = omapfb_setcolreg,
+       .fb_setcmap     = omapfb_setcmap,
+       .fb_fillrect    = cfb_fillrect,
+       .fb_copyarea    = cfb_copyarea,
+       .fb_imageblit   = cfb_imageblit,
+       .fb_blank       = omapfb_blank,
+       .fb_ioctl       = omapfb_ioctl,
+       .fb_check_var   = omapfb_check_var,
+       .fb_set_par     = omapfb_set_par,
+       .fb_rotate      = omapfb_rotate,
+       .fb_pan_display = omapfb_pan_display,
+};
+
+/*
+ * ---------------------------------------------------------------------------
+ * Sysfs interface
+ * ---------------------------------------------------------------------------
+ */
+/* omapfbX sysfs entries */
+static ssize_t omapfb_show_caps_num(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+       int plane;
+       size_t size;
+       struct omapfb_caps caps;
+
+       plane = 0;
+       size = 0;
+       while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
+               omapfb_get_caps(fbdev, plane, &caps);
+               size += snprintf(&buf[size], PAGE_SIZE - size,
+                       "plane#%d %#010x %#010x %#010x\n",
+                       plane, caps.ctrl, caps.plane_color, caps.wnd_color);
+               plane++;
+       }
+       return size;
+}
+
+static ssize_t omapfb_show_caps_text(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+       int i;
+       struct omapfb_caps caps;
+       int plane;
+       size_t size;
+
+       plane = 0;
+       size = 0;
+       while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
+               omapfb_get_caps(fbdev, plane, &caps);
+               size += snprintf(&buf[size], PAGE_SIZE - size,
+                                "plane#%d:\n", plane);
+               for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
+                    size < PAGE_SIZE; i++) {
+                       if (ctrl_caps[i].flag & caps.ctrl)
+                               size += snprintf(&buf[size], PAGE_SIZE - size,
+                                       " %s\n", ctrl_caps[i].name);
+               }
+               size += snprintf(&buf[size], PAGE_SIZE - size,
+                                " plane colors:\n");
+               for (i = 0; i < ARRAY_SIZE(color_caps) &&
+                    size < PAGE_SIZE; i++) {
+                       if (color_caps[i].flag & caps.plane_color)
+                               size += snprintf(&buf[size], PAGE_SIZE - size,
+                                       "  %s\n", color_caps[i].name);
+               }
+               size += snprintf(&buf[size], PAGE_SIZE - size,
+                                " window colors:\n");
+               for (i = 0; i < ARRAY_SIZE(color_caps) &&
+                    size < PAGE_SIZE; i++) {
+                       if (color_caps[i].flag & caps.wnd_color)
+                               size += snprintf(&buf[size], PAGE_SIZE - size,
+                                       "  %s\n", color_caps[i].name);
+               }
+
+               plane++;
+       }
+       return size;
+}
+
+static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
+static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
+
+/* panel sysfs entries */
+static ssize_t omapfb_show_panel_name(struct device *dev,
+                                     struct device_attribute *attr, char *buf)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+
+       return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
+}
+
+static ssize_t omapfb_show_bklight_level(struct device *dev,
+                                        struct device_attribute *attr,
+                                        char *buf)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+       int r;
+
+       if (fbdev->panel->get_bklight_level) {
+               r = snprintf(buf, PAGE_SIZE, "%d\n",
+                            fbdev->panel->get_bklight_level(fbdev->panel));
+       } else
+               r = -ENODEV;
+       return r;
+}
+
+static ssize_t omapfb_store_bklight_level(struct device *dev,
+                                         struct device_attribute *attr,
+                                         const char *buf, size_t size)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+       int r;
+
+       if (fbdev->panel->set_bklight_level) {
+               unsigned int level;
+
+               if (sscanf(buf, "%10d", &level) == 1) {
+                       r = fbdev->panel->set_bklight_level(fbdev->panel,
+                                                           level);
+               } else
+                       r = -EINVAL;
+       } else
+               r = -ENODEV;
+       return r ? r : size;
+}
+
+static ssize_t omapfb_show_bklight_max(struct device *dev,
+                                      struct device_attribute *attr, char *buf)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+       int r;
+
+       if (fbdev->panel->get_bklight_level) {
+               r = snprintf(buf, PAGE_SIZE, "%d\n",
+                            fbdev->panel->get_bklight_max(fbdev->panel));
+       } else
+               r = -ENODEV;
+       return r;
+}
+
+static struct device_attribute dev_attr_panel_name =
+       __ATTR(name, 0444, omapfb_show_panel_name, NULL);
+static DEVICE_ATTR(backlight_level, 0664,
+                  omapfb_show_bklight_level, omapfb_store_bklight_level);
+static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
+
+static struct attribute *panel_attrs[] = {
+       &dev_attr_panel_name.attr,
+       &dev_attr_backlight_level.attr,
+       &dev_attr_backlight_max.attr,
+       NULL,
+};
+
+static struct attribute_group panel_attr_grp = {
+       .name  = "panel",
+       .attrs = panel_attrs,
+};
+
+/* ctrl sysfs entries */
+static ssize_t omapfb_show_ctrl_name(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+       struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
+
+       return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
+}
+
+static struct device_attribute dev_attr_ctrl_name =
+       __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
+
+static struct attribute *ctrl_attrs[] = {
+       &dev_attr_ctrl_name.attr,
+       NULL,
+};
+
+static struct attribute_group ctrl_attr_grp = {
+       .name  = "ctrl",
+       .attrs = ctrl_attrs,
+};
+
+static int omapfb_register_sysfs(struct omapfb_device *fbdev)
+{
+       int r;
+
+       if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
+               goto fail0;
+
+       if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
+               goto fail1;
+
+       if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
+               goto fail2;
+
+       if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
+               goto fail3;
+
+       return 0;
+fail3:
+       sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
+fail2:
+       device_remove_file(fbdev->dev, &dev_attr_caps_text);
+fail1:
+       device_remove_file(fbdev->dev, &dev_attr_caps_num);
+fail0:
+       dev_err(fbdev->dev, "unable to register sysfs interface\n");
+       return r;
+}
+
+static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
+{
+       sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
+       sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
+       device_remove_file(fbdev->dev, &dev_attr_caps_num);
+       device_remove_file(fbdev->dev, &dev_attr_caps_text);
+}
+
+/*
+ * ---------------------------------------------------------------------------
+ * LDM callbacks
+ * ---------------------------------------------------------------------------
+ */
+/* Initialize system fb_info object and set the default video mode.
+ * The frame buffer memory already allocated by lcddma_init
+ */
+static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
+{
+       struct fb_var_screeninfo        *var = &info->var;
+       struct fb_fix_screeninfo        *fix = &info->fix;
+       int                             r = 0;
+
+       info->fbops = &omapfb_ops;
+       info->flags = FBINFO_FLAG_DEFAULT;
+
+       strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
+
+       info->pseudo_palette = fbdev->pseudo_palette;
+
+       var->accel_flags  = def_accel ? FB_ACCELF_TEXT : 0;
+       var->xres = def_vxres;
+       var->yres = def_vyres;
+       var->xres_virtual = def_vxres;
+       var->yres_virtual = def_vyres;
+       var->rotate       = def_rotate;
+       var->bits_per_pixel = fbdev->panel->bpp;
+
+       set_fb_var(info, var);
+       set_fb_fix(info);
+
+       r = fb_alloc_cmap(&info->cmap, 16, 0);
+       if (r != 0)
+               dev_err(fbdev->dev, "unable to allocate color map memory\n");
+
+       return r;
+}
+
+/* Release the fb_info object */
+static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
+{
+       fb_dealloc_cmap(&fbi->cmap);
+}
+
+static void planes_cleanup(struct omapfb_device *fbdev)
+{
+       int i;
+
+       for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
+               if (fbdev->fb_info[i] == NULL)
+                       break;
+               fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
+               framebuffer_release(fbdev->fb_info[i]);
+       }
+}
+
+static int planes_init(struct omapfb_device *fbdev)
+{
+       struct fb_info *fbi;
+       int i;
+       int r;
+
+       for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
+               struct omapfb_plane_struct *plane;
+               fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
+                                       fbdev->dev);
+               if (fbi == NULL) {
+                       dev_err(fbdev->dev,
+                               "unable to allocate memory for plane info\n");
+                       planes_cleanup(fbdev);
+                       return -ENOMEM;
+               }
+               plane = fbi->par;
+               plane->idx = i;
+               plane->fbdev = fbdev;
+               plane->info.mirror = def_mirror;
+               fbdev->fb_info[i] = fbi;
+
+               if ((r = fbinfo_init(fbdev, fbi)) < 0) {
+                       framebuffer_release(fbi);
+                       planes_cleanup(fbdev);
+                       return r;
+               }
+               plane->info.out_width = fbi->var.xres;
+               plane->info.out_height = fbi->var.yres;
+       }
+       return 0;
+}
+
+/*
+ * Free driver resources. Can be called to rollback an aborted initialization
+ * sequence.
+ */
+static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
+{
+       int i;
+
+       switch (state) {
+       case OMAPFB_ACTIVE:
+               for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
+                       unregister_framebuffer(fbdev->fb_info[i]);
+       case 7:
+               omapfb_unregister_sysfs(fbdev);
+       case 6:
+               fbdev->panel->disable(fbdev->panel);
+       case 5:
+               omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
+       case 4:
+               planes_cleanup(fbdev);
+       case 3:
+               ctrl_cleanup(fbdev);
+       case 2:
+               fbdev->panel->cleanup(fbdev->panel);
+       case 1:
+               dev_set_drvdata(fbdev->dev, NULL);
+               kfree(fbdev);
+       case 0:
+               /* nothing to free */
+               break;
+       default:
+               BUG();
+       }
+}
+
+static int omapfb_find_ctrl(struct omapfb_device *fbdev)
+{
+       struct omapfb_platform_data *conf;
+       char name[17];
+       int i;
+
+       conf = fbdev->dev->platform_data;
+
+       fbdev->ctrl = NULL;
+
+       strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
+       name[sizeof(name) - 1] = '\0';
+
+       if (strcmp(name, "internal") == 0) {
+               fbdev->ctrl = fbdev->int_ctrl;
+               return 0;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
+               dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
+               if (strcmp(ctrls[i]->name, name) == 0) {
+                       fbdev->ctrl = ctrls[i];
+                       break;
+               }
+       }
+
+       if (fbdev->ctrl == NULL) {
+               dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
+               return -1;
+       }
+
+       return 0;
+}
+
+static void check_required_callbacks(struct omapfb_device *fbdev)
+{
+#define _C(x) (fbdev->ctrl->x != NULL)
+#define _P(x) (fbdev->panel->x != NULL)
+       BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
+       BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
+                _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
+                _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
+                _P(get_caps)));
+#undef _P
+#undef _C
+}
+
+/*
+ * Called by LDM binding to probe and attach a new device.
+ * Initialization sequence:
+ *   1. allocate system omapfb_device structure
+ *   2. select controller type according to platform configuration
+ *      init LCD panel
+ *   3. init LCD controller and LCD DMA
+ *   4. init system fb_info structure for all planes
+ *   5. setup video mode for first plane and enable it
+ *   6. enable LCD panel
+ *   7. register sysfs attributes
+ *   OMAPFB_ACTIVE: register system fb_info structure for all planes
+ */
+static int omapfb_do_probe(struct platform_device *pdev,
+                               struct lcd_panel *panel)
+{
+       struct omapfb_device    *fbdev = NULL;
+       int                     init_state;
+       unsigned long           phz, hhz, vhz;
+       unsigned long           vram;
+       int                     i;
+       int                     r = 0;
+
+       init_state = 0;
+
+       if (pdev->num_resources != 0) {
+               dev_err(&pdev->dev, "probed for an unknown device\n");
+               r = -ENODEV;
+               goto cleanup;
+       }
+
+       if (pdev->dev.platform_data == NULL) {
+               dev_err(&pdev->dev, "missing platform data\n");
+               r = -ENOENT;
+               goto cleanup;
+       }
+
+       fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
+       if (fbdev == NULL) {
+               dev_err(&pdev->dev,
+                       "unable to allocate memory for device info\n");
+               r = -ENOMEM;
+               goto cleanup;
+       }
+       init_state++;
+
+       fbdev->dev = &pdev->dev;
+       fbdev->panel = panel;
+       platform_set_drvdata(pdev, fbdev);
+
+       mutex_init(&fbdev->rqueue_mutex);
+
+#ifdef CONFIG_ARCH_OMAP1
+       fbdev->int_ctrl = &omap1_int_ctrl;
+#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
+       fbdev->ext_if = &omap1_ext_if;
+#endif
+#else  /* OMAP2 */
+       fbdev->int_ctrl = &omap2_int_ctrl;
+#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
+       fbdev->ext_if = &omap2_ext_if;
+#endif
+#endif
+       if (omapfb_find_ctrl(fbdev) < 0) {
+               dev_err(fbdev->dev,
+                       "LCD controller not found, board not supported\n");
+               r = -ENODEV;
+               goto cleanup;
+       }
+
+       r = fbdev->panel->init(fbdev->panel, fbdev);
+       if (r)
+               goto cleanup;
+
+       pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
+
+       def_vxres = def_vxres ? : fbdev->panel->x_res;
+       def_vyres = def_vyres ? : fbdev->panel->y_res;
+
+       init_state++;
+
+       r = ctrl_init(fbdev);
+       if (r)
+               goto cleanup;
+       if (fbdev->ctrl->mmap != NULL)
+               omapfb_ops.fb_mmap = omapfb_mmap;
+       init_state++;
+
+       check_required_callbacks(fbdev);
+
+       r = planes_init(fbdev);
+       if (r)
+               goto cleanup;
+       init_state++;
+
+#ifdef CONFIG_FB_OMAP_DMA_TUNE
+       /* Set DMA priority for EMIFF access to highest */
+       if (cpu_class_is_omap1())
+               omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
+#endif
+
+       r = ctrl_change_mode(fbdev->fb_info[0]);
+       if (r) {
+               dev_err(fbdev->dev, "mode setting failed\n");
+               goto cleanup;
+       }
+
+       /* GFX plane is enabled by default */
+       r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
+       if (r)
+               goto cleanup;
+
+       omapfb_set_update_mode(fbdev, manual_update ?
+                                  OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
+       init_state++;
+
+       r = fbdev->panel->enable(fbdev->panel);
+       if (r)
+               goto cleanup;
+       init_state++;
+
+       r = omapfb_register_sysfs(fbdev);
+       if (r)
+               goto cleanup;
+       init_state++;
+
+       vram = 0;
+       for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
+               r = register_framebuffer(fbdev->fb_info[i]);
+               if (r != 0) {
+                       dev_err(fbdev->dev,
+                               "registering framebuffer %d failed\n", i);
+                       goto cleanup;
+               }
+               vram += fbdev->mem_desc.region[i].size;
+       }
+
+       fbdev->state = OMAPFB_ACTIVE;
+
+       panel = fbdev->panel;
+       phz = panel->pixel_clock * 1000;
+       hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
+       vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
+
+       omapfb_dev = fbdev;
+
+       pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
+                       vram, fbdev->mem_desc.region_cnt);
+       pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
+                       "vfreq %lu.%lu Hz\n",
+                       phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
+
+       return 0;
+
+cleanup:
+       omapfb_free_resources(fbdev, init_state);
+
+       return r;
+}
+
+static int omapfb_probe(struct platform_device *pdev)
+{
+       BUG_ON(fbdev_pdev != NULL);
+
+       /* Delay actual initialization until the LCD is registered */
+       fbdev_pdev = pdev;
+       if (fbdev_panel != NULL)
+               omapfb_do_probe(fbdev_pdev, fbdev_panel);
+       return 0;
+}
+
+void omapfb_register_panel(struct lcd_panel *panel)
+{
+       BUG_ON(fbdev_panel != NULL);
+
+       fbdev_panel = panel;
+       if (fbdev_pdev != NULL)
+               omapfb_do_probe(fbdev_pdev, fbdev_panel);
+}
+
+/* Called when the device is being detached from the driver */
+static int omapfb_remove(struct platform_device *pdev)
+{
+       struct omapfb_device *fbdev = platform_get_drvdata(pdev);
+       enum omapfb_state saved_state = fbdev->state;
+
+       /* FIXME: wait till completion of pending events */
+
+       fbdev->state = OMAPFB_DISABLED;
+       omapfb_free_resources(fbdev, saved_state);
+
+       return 0;
+}
+
+/* PM suspend */
+static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+       struct omapfb_device *fbdev = platform_get_drvdata(pdev);
+
+       omapfb_blank(VESA_POWERDOWN, fbdev->fb_info[0]);
+
+       return 0;
+}
+
+/* PM resume */
+static int omapfb_resume(struct platform_device *pdev)
+{
+       struct omapfb_device *fbdev = platform_get_drvdata(pdev);
+
+       omapfb_blank(VESA_NO_BLANKING, fbdev->fb_info[0]);
+       return 0;
+}
+
+static struct platform_driver omapfb_driver = {
+       .probe          = omapfb_probe,
+       .remove         = omapfb_remove,
+       .suspend        = omapfb_suspend,
+       .resume         = omapfb_resume,
+       .driver         = {
+               .name   = MODULE_NAME,
+               .owner  = THIS_MODULE,
+       },
+};
+
+#ifndef MODULE
+
+/* Process kernel command line parameters */
+static int __init omapfb_setup(char *options)
+{
+       char *this_opt = NULL;
+       int r = 0;
+
+       pr_debug("omapfb: options %s\n", options);
+
+       if (!options || !*options)
+               return 0;
+
+       while (!r && (this_opt = strsep(&options, ",")) != NULL) {
+               if (!strncmp(this_opt, "accel", 5))
+                       def_accel = 1;
+               else if (!strncmp(this_opt, "vram:", 5)) {
+                       char *suffix;
+                       unsigned long vram;
+                       vram = (simple_strtoul(this_opt + 5, &suffix, 0));
+                       switch (suffix[0]) {
+                       case '\0':
+                               break;
+                       case 'm':
+                       case 'M':
+                               vram *= 1024;
+                               /* Fall through */
+                       case 'k':
+                       case 'K':
+                               vram *= 1024;
+                               break;
+                       default:
+                               pr_debug("omapfb: invalid vram suffix %c\n",
+                                        suffix[0]);
+                               r = -1;
+                       }
+                       def_vram[def_vram_cnt++] = vram;
+               }
+               else if (!strncmp(this_opt, "vxres:", 6))
+                       def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
+               else if (!strncmp(this_opt, "vyres:", 6))
+                       def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
+               else if (!strncmp(this_opt, "rotate:", 7))
+                       def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
+               else if (!strncmp(this_opt, "mirror:", 7))
+                       def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
+               else if (!strncmp(this_opt, "manual_update", 13))
+                       manual_update = 1;
+               else {
+                       pr_debug("omapfb: invalid option\n");
+                       r = -1;
+               }
+       }
+
+       return r;
+}
+
+#endif
+
+/* Register both the driver and the device */
+static int __init omapfb_init(void)
+{
+#ifndef MODULE
+       char *option;
+
+       if (fb_get_options("omapfb", &option))
+               return -ENODEV;
+       omapfb_setup(option);
+#endif
+       /* Register the driver with LDM */
+       if (platform_driver_register(&omapfb_driver)) {
+               pr_debug("failed to register omapfb driver\n");
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+static void __exit omapfb_cleanup(void)
+{
+       platform_driver_unregister(&omapfb_driver);
+}
+
+module_param_named(accel, def_accel, uint, 0664);
+module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
+module_param_named(vxres, def_vxres, long, 0664);
+module_param_named(vyres, def_vyres, long, 0664);
+module_param_named(rotate, def_rotate, uint, 0664);
+module_param_named(mirror, def_mirror, uint, 0664);
+module_param_named(manual_update, manual_update, bool, 0664);
+
+module_init(omapfb_init);
+module_exit(omapfb_cleanup);
+
+MODULE_DESCRIPTION("TI OMAP framebuffer driver");
+MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
+MODULE_LICENSE("GPL");