video: tegra: fb: Configure dc from fb
[linux-2.6.git] / drivers / video / tegra / fb.c
index e9bc1f7..da7b9d1 100644 (file)
@@ -6,7 +6,7 @@
  *         Colin Cross <ccross@android.com>
  *         Travis Geiselbrecht <travis@palm.com>
  *
- * Copyright (C) 2010-2011 NVIDIA Corporation
+ * Copyright (c) 2010-2012, NVIDIA CORPORATION, All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
 #include <mach/dc.h>
 #include <mach/fb.h>
 #include <linux/nvhost.h>
-#include <mach/nvmap.h>
+#include <linux/nvmap.h>
+#include <linux/console.h>
+
 
 #include "host/dev.h"
 #include "nvmap/nvmap.h"
 #include "dc/dc_priv.h"
 
 /* Pad pitch to 16-byte boundary. */
-#define TEGRA_LINEAR_PITCH_ALIGNMENT 16
+#define TEGRA_LINEAR_PITCH_ALIGNMENT 32
 
 struct tegra_fb_info {
        struct tegra_dc_win     *win;
@@ -64,11 +66,27 @@ static u32 pseudo_palette[16];
 static int tegra_fb_check_var(struct fb_var_screeninfo *var,
                              struct fb_info *info)
 {
+       struct tegra_fb_info *tegra_fb = info->par;
+       struct tegra_dc *dc = tegra_fb->win->dc;
+       struct tegra_dc_out_ops *ops = dc->out_ops;
+       struct fb_videomode mode;
+
        if ((var->yres * var->xres * var->bits_per_pixel / 8 * 2) >
            info->screen_size)
                return -EINVAL;
 
-       /* double yres_virtual to allow double buffering through pan_display */
+       /* Apply mode filter for HDMI only -LVDS supports only fix mode */
+       if (ops && ops->mode_filter) {
+
+               fb_var_to_videomode(&mode, var);
+               if (!ops->mode_filter(dc, &mode))
+                       return -EINVAL;
+
+               /* Mode filter may have modified the mode */
+               fb_videomode_to_var(var, &mode);
+       }
+
+       /* Double yres_virtual to allow double buffering through pan_display */
        var->yres_virtual = var->yres * 2;
 
        return 0;
@@ -106,10 +124,13 @@ static int tegra_fb_set_par(struct fb_info *info)
                default:
                        return -EINVAL;
                }
-               info->fix.line_length = var->xres * var->bits_per_pixel / 8;
-               /* Pad the stride to 16-byte boundary. */
-               info->fix.line_length = round_up(info->fix.line_length,
+               /* if line_length unset, then pad the stride */
+               if (!info->fix.line_length) {
+                       info->fix.line_length = var->xres * var->bits_per_pixel
+                               / 8;
+                       info->fix.line_length = round_up(info->fix.line_length,
                                                TEGRA_LINEAR_PITCH_ALIGNMENT);
+               }
                tegra_fb->win->stride = info->fix.line_length;
                tegra_fb->win->stride_uv = 0;
                tegra_fb->win->phys_addr_u = 0;
@@ -134,9 +155,15 @@ static int tegra_fb_set_par(struct fb_info *info)
                 * client requests it
                 */
                stereo = !!(var->vmode & info->mode->vmode &
+#ifndef CONFIG_TEGRA_HDMI_74MHZ_LIMIT
                                        FB_VMODE_STEREO_FRAME_PACK);
-
+#else
+                                       FB_VMODE_STEREO_LEFT_RIGHT);
+#endif
                tegra_dc_set_fb_mode(tegra_fb->win->dc, info->mode, stereo);
+               /* Reflect the mode change on dc */
+               tegra_dc_disable(tegra_fb->win->dc);
+               tegra_dc_enable(tegra_fb->win->dc);
 
                tegra_fb->win->w.full = dfixed_const(info->mode->xres);
                tegra_fb->win->h.full = dfixed_const(info->mode->yres);
@@ -272,7 +299,8 @@ static int tegra_fb_pan_display(struct fb_var_screeninfo *var,
                        (var->xoffset * (var->bits_per_pixel/8));
 
                tegra_fb->win->phys_addr = addr;
-               /* TODO: update virt_addr */
+               tegra_fb->win->flags = TEGRA_WIN_FLAG_ENABLED;
+               tegra_fb->win->virt_addr = info->screen_base;
 
                tegra_dc_update_windows(&tegra_fb->win, 1);
                tegra_dc_sync_windows(&tegra_fb->win, 1);
@@ -301,8 +329,10 @@ static void tegra_fb_imageblit(struct fb_info *info,
 
 static int tegra_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 {
+       struct tegra_fb_info *tegra_fb = (struct tegra_fb_info *)info->par;
        struct tegra_fb_modedb modedb;
        struct fb_modelist *modelist;
+       struct fb_vblank vblank = {};
        int i;
 
        switch (cmd) {
@@ -345,6 +375,17 @@ static int tegra_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long
                        return -EFAULT;
                break;
 
+       case FBIOGET_VBLANK:
+               tegra_dc_get_fbvblank(tegra_fb->win->dc, &vblank);
+
+               if (copy_to_user(
+                       (void __user *)arg, &vblank, sizeof(vblank)))
+                       return -EFAULT;
+               break;
+
+       case FBIO_WAITFORVSYNC:
+               return tegra_dc_wait_for_vsync(tegra_fb->win->dc);
+
        default:
                return -ENOTTY;
        }
@@ -352,6 +393,41 @@ static int tegra_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long
        return 0;
 }
 
+int tegra_fb_get_mode(struct tegra_dc *dc) {
+       return dc->fb->info->mode->refresh;
+}
+
+int tegra_fb_set_mode(struct tegra_dc *dc, int fps) {
+       size_t stereo;
+       struct list_head *pos;
+       struct fb_videomode *best_mode = NULL;
+       int curr_diff = INT_MAX; /* difference of best_mode refresh rate */
+       struct fb_modelist *modelist;
+       struct fb_info *info = dc->fb->info;
+
+       list_for_each(pos, &info->modelist) {
+               struct fb_videomode *mode;
+
+               modelist = list_entry(pos, struct fb_modelist, list);
+               mode = &modelist->mode;
+               if (fps <= mode->refresh && curr_diff > (mode->refresh - fps)) {
+                       curr_diff = mode->refresh - fps;
+                       best_mode = mode;
+               }
+       }
+       if (best_mode) {
+               info->mode = best_mode;
+               stereo = !!(info->var.vmode & info->mode->vmode &
+#ifndef CONFIG_TEGRA_HDMI_74MHZ_LIMIT
+                               FB_VMODE_STEREO_FRAME_PACK);
+#else
+                               FB_VMODE_STEREO_LEFT_RIGHT);
+#endif
+               return tegra_dc_set_fb_mode(dc, best_mode, stereo);
+       }
+       return -EIO;
+}
+
 static struct fb_ops tegra_fb_ops = {
        .owner = THIS_MODULE,
        .fb_check_var = tegra_fb_check_var,
@@ -365,13 +441,62 @@ static struct fb_ops tegra_fb_ops = {
        .fb_ioctl = tegra_fb_ioctl,
 };
 
+const struct fb_videomode *tegra_fb_find_best_mode(
+       struct fb_var_screeninfo *var,
+       struct list_head *head)
+{
+       struct list_head *pos;
+       struct fb_modelist *modelist;
+       struct fb_videomode *mode, *best = NULL;
+       int diff = 0;
+
+       list_for_each(pos, head) {
+               int d;
+
+               modelist = list_entry(pos, struct fb_modelist, list);
+               mode = &modelist->mode;
+
+               if (mode->xres >= var->xres && mode->yres >= var->yres) {
+                       d = (mode->xres - var->xres) +
+                               (mode->yres - var->yres);
+                       if (diff < d) {
+                               diff = d;
+                               best = mode;
+                       } else if (diff == d && best &&
+                                  mode->refresh > best->refresh)
+                               best = mode;
+               }
+       }
+       return best;
+}
+
+static int tegra_fb_activate_mode(struct tegra_fb_info *fb_info,
+                               struct fb_var_screeninfo *var)
+{
+       int err;
+       struct fb_info *info = fb_info->info;
+
+       console_lock();
+       info->flags |= FBINFO_MISC_USEREVENT;
+       err = fb_set_var(info, var);
+       info->flags &= ~FBINFO_MISC_USEREVENT;
+       console_unlock();
+       if (err)
+               return err;
+       return 0;
+}
+
 void tegra_fb_update_monspecs(struct tegra_fb_info *fb_info,
                              struct fb_monspecs *specs,
                              bool (*mode_filter)(const struct tegra_dc *dc,
                                                  struct fb_videomode *mode))
 {
-       struct fb_event event;
        int i;
+       int ret = 0;
+       struct fb_event event;
+       struct fb_info *info = fb_info->info;
+       const struct fb_videomode *best_mode = NULL;
+       struct fb_var_screeninfo var = {0,};
 
        mutex_lock(&fb_info->info->lock);
        fb_destroy_modedb(fb_info->info->monspecs.modedb);
@@ -396,20 +521,58 @@ void tegra_fb_update_monspecs(struct tegra_fb_info *fb_info,
 
        memcpy(&fb_info->info->monspecs, specs,
               sizeof(fb_info->info->monspecs));
+       fb_info->info->mode = specs->modedb;
 
+       /* Prepare a mode db */
        for (i = 0; i < specs->modedb_len; i++) {
-               if (mode_filter) {
-                       if (mode_filter(fb_info->win->dc, &specs->modedb[i]))
-                               fb_add_videomode(&specs->modedb[i],
+               if (info->fbops->fb_check_var) {
+                       struct fb_videomode m;
+
+                       /* Call mode filter to check mode */
+                       fb_videomode_to_var(&var, &specs->modedb[i]);
+                       if (!(info->fbops->fb_check_var(&var, info))) {
+                               fb_var_to_videomode(&m, &var);
+                               fb_add_videomode(&m,
                                                 &fb_info->info->modelist);
+                       }
                } else {
                        fb_add_videomode(&specs->modedb[i],
                                         &fb_info->info->modelist);
                }
        }
 
+       /* Get the best mode from modedb and apply on fb */
+       var.xres = 0;
+       var.yres = 0;
+       best_mode = tegra_fb_find_best_mode(&var, &info->modelist);
+
+       /* Update framebuffer with best mode */
+       fb_videomode_to_var(&var, best_mode);
+
+       /* TODO: Get proper way of getting rid of a 0 bpp */
+       if (!var.bits_per_pixel)
+               var.bits_per_pixel = 32;
+
+       memcpy(&info->var, &var, sizeof(struct fb_var_screeninfo));
+
+       ret = tegra_fb_activate_mode(fb_info, &var);
+       if (ret)
+               return;
+
        event.info = fb_info->info;
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE
+/* Lock the console before sending the noti. Fbconsole
+  * on HDMI might be using console
+  */
+       console_lock();
+#endif
        fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE
+/* Unlock the console */
+       console_unlock();
+#endif
+
        mutex_unlock(&fb_info->info->lock);
 }
 
@@ -425,6 +588,7 @@ struct tegra_fb_info *tegra_fb_register(struct nvhost_device *ndev,
        unsigned long fb_size = 0;
        unsigned long fb_phys = 0;
        int ret = 0;
+       unsigned stride;
 
        win = tegra_dc_get_window(dc, fb_data->win);
        if (!win) {
@@ -458,6 +622,13 @@ struct tegra_fb_info *tegra_fb_register(struct nvhost_device *ndev,
                tegra_fb->valid = true;
        }
 
+       info->fix.line_length = fb_data->xres * fb_data->bits_per_pixel / 8;
+
+       stride = tegra_dc_get_stride(dc, 0);
+       if (!stride) /* default to pad the stride */
+               stride = round_up(info->fix.line_length,
+                       TEGRA_LINEAR_PITCH_ALIGNMENT);
+
        info->fbops = &tegra_fb_ops;
        info->pseudo_palette = pseudo_palette;
        info->screen_base = fb_base;
@@ -471,10 +642,7 @@ struct tegra_fb_info *tegra_fb_register(struct nvhost_device *ndev,
        info->fix.accel         = FB_ACCEL_NONE;
        info->fix.smem_start    = fb_phys;
        info->fix.smem_len      = fb_size;
-       info->fix.line_length = fb_data->xres * fb_data->bits_per_pixel / 8;
-       /* Pad the stride to 16-byte boundary. */
-       info->fix.line_length = round_up(info->fix.line_length,
-                                       TEGRA_LINEAR_PITCH_ALIGNMENT);
+       info->fix.line_length = stride;
 
        info->var.xres                  = fb_data->xres;
        info->var.yres                  = fb_data->yres;
@@ -531,14 +699,22 @@ struct tegra_fb_info *tegra_fb_register(struct nvhost_device *ndev,
 
        if (dc->mode.pclk > 1000) {
                struct tegra_dc_mode *mode = &dc->mode;
+               struct fb_videomode vmode;
 
-               info->var.pixclock = KHZ2PICOS(mode->pclk / 1000);
+               if (dc->out->flags & TEGRA_DC_OUT_ONE_SHOT_MODE)
+                       info->var.pixclock = KHZ2PICOS(mode->rated_pclk / 1000);
+               else
+                       info->var.pixclock = KHZ2PICOS(mode->pclk / 1000);
                info->var.left_margin = mode->h_back_porch;
                info->var.right_margin = mode->h_front_porch;
                info->var.upper_margin = mode->v_back_porch;
                info->var.lower_margin = mode->v_front_porch;
                info->var.hsync_len = mode->h_sync_width;
                info->var.vsync_len = mode->v_sync_width;
+
+               /* Keep info->var consistent with info->modelist. */
+               fb_var_to_videomode(&vmode, &info->var);
+               fb_add_videomode(&vmode, &info->modelist);
        }
 
        return tegra_fb;