drm/i915/hdmi: split infoframe setting from infoframe type code
Jesse Barnes [Wed, 3 Aug 2011 16:22:55 +0000 (09:22 -0700)]
This makes it easier to add support for other infoframes (e.g. SPD,
vendor specific).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/intel_drv.h
drivers/gpu/drm/i915/intel_hdmi.c

index be67a59..56cae72 100644 (file)
 #define   VIDEO_DIP_SELECT_AVI         (0 << 19)
 #define   VIDEO_DIP_SELECT_VENDOR      (1 << 19)
 #define   VIDEO_DIP_SELECT_SPD         (3 << 19)
+#define   VIDEO_DIP_SELECT_MASK                (3 << 19)
 #define   VIDEO_DIP_FREQ_ONCE          (0 << 16)
 #define   VIDEO_DIP_FREQ_VSYNC         (1 << 16)
 #define   VIDEO_DIP_FREQ_2VSYNC                (2 << 16)
index 6e990f9..2f47dcf 100644 (file)
@@ -178,6 +178,8 @@ struct intel_crtc {
 #define to_intel_encoder(x) container_of(x, struct intel_encoder, base)
 #define to_intel_framebuffer(x) container_of(x, struct intel_framebuffer, base)
 
+#define DIP_HEADER_SIZE        5
+
 #define DIP_TYPE_AVI    0x82
 #define DIP_VERSION_AVI 0x2
 #define DIP_LEN_AVI     13
index 105e2b8..d43cebd 100644 (file)
@@ -45,6 +45,8 @@ struct intel_hdmi {
        bool has_hdmi_sink;
        bool has_audio;
        int force_audio;
+       void (*write_infoframe)(struct drm_encoder *encoder,
+                               struct dip_infoframe *frame);
 };
 
 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
@@ -58,37 +60,70 @@ static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
                            struct intel_hdmi, base);
 }
 
-void intel_dip_infoframe_csum(struct dip_infoframe *avi_if)
+void intel_dip_infoframe_csum(struct dip_infoframe *frame)
 {
-       uint8_t *data = (uint8_t *)avi_if;
+       uint8_t *data = (uint8_t *)frame;
        uint8_t sum = 0;
        unsigned i;
 
-       avi_if->checksum = 0;
-       avi_if->ecc = 0;
+       frame->checksum = 0;
+       frame->ecc = 0;
 
-       for (i = 0; i < sizeof(*avi_if); i++)
+       /* Header isn't part of the checksum */
+       for (i = 5; i < frame->len; i++)
                sum += data[i];
 
-       avi_if->checksum = 0x100 - sum;
+       frame->checksum = 0x100 - sum;
 }
 
-static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
+static u32 intel_infoframe_index(struct dip_infoframe *frame)
 {
-       struct dip_infoframe avi_if = {
-               .type = DIP_TYPE_AVI,
-               .ver = DIP_VERSION_AVI,
-               .len = DIP_LEN_AVI,
-       };
-       uint32_t *data = (uint32_t *)&avi_if;
+       u32 flags = 0;
+
+       switch (frame->type) {
+       case DIP_TYPE_AVI:
+               flags |= VIDEO_DIP_SELECT_AVI;
+               break;
+       case DIP_TYPE_SPD:
+               flags |= VIDEO_DIP_SELECT_SPD;
+               break;
+       default:
+               DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
+               break;
+       }
+
+       return flags;
+}
+
+static u32 intel_infoframe_flags(struct dip_infoframe *frame)
+{
+       u32 flags = 0;
+
+       switch (frame->type) {
+       case DIP_TYPE_AVI:
+               flags |= VIDEO_DIP_ENABLE_AVI | VIDEO_DIP_FREQ_VSYNC;
+               break;
+       case DIP_TYPE_SPD:
+               flags |= VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_FREQ_2VSYNC;
+               break;
+       default:
+               DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
+               break;
+       }
+
+       return flags;
+}
+
+static void i9xx_write_infoframe(struct drm_encoder *encoder,
+                                struct dip_infoframe *frame)
+{
+       uint32_t *data = (uint32_t *)frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
-       u32 port;
-       unsigned i;
+       u32 port, flags, val = I915_READ(VIDEO_DIP_CTL);
+       unsigned i, len = DIP_HEADER_SIZE + frame->len;
 
-       if (!intel_hdmi->has_hdmi_sink)
-               return;
 
        /* XXX first guess at handling video port, is this corrent? */
        if (intel_hdmi->sdvox_reg == SDVOB)
@@ -98,52 +133,72 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
        else
                return;
 
-       I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
-                  VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC);
+       flags = intel_infoframe_index(frame);
+
+       val &= ~VIDEO_DIP_SELECT_MASK;
+
+       I915_WRITE(VIDEO_DIP_CTL, val | port | flags);
 
-       intel_dip_infoframe_csum(&avi_if);
-       for (i = 0; i < sizeof(avi_if); i += 4) {
+       for (i = 0; i < len; i += 4) {
                I915_WRITE(VIDEO_DIP_DATA, *data);
                data++;
        }
 
-       I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
-                  VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC |
-                  VIDEO_DIP_ENABLE_AVI);
+       flags |= intel_infoframe_flags(frame);
+
+       I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
 }
 
-static void intel_ironlake_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
+static void ironlake_write_infoframe(struct drm_encoder *encoder,
+                                    struct dip_infoframe *frame)
 {
-       struct dip_infoframe avi_if = {
-               .type = DIP_TYPE_AVI,
-               .ver = DIP_VERSION_AVI,
-               .len = DIP_LEN_AVI,
-       };
-       uint32_t *data = (uint32_t *)&avi_if;
+       uint32_t *data = (uint32_t *)frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
-       struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
        struct drm_crtc *crtc = encoder->crtc;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
        int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
-       unsigned i;
-
-       if (!intel_hdmi->has_hdmi_sink)
-               return;
+       unsigned i, len = DIP_HEADER_SIZE + frame->len;
+       u32 flags, val = I915_READ(reg);
 
        intel_wait_for_vblank(dev, intel_crtc->pipe);
 
-       I915_WRITE(reg, VIDEO_DIP_SELECT_AVI);
+       flags = intel_infoframe_index(frame);
 
-       intel_dip_infoframe_csum(&avi_if);
-       for (i = 0; i < sizeof(avi_if); i += 4) {
+       val &= ~VIDEO_DIP_SELECT_MASK;
+
+       I915_WRITE(reg, val | flags);
+
+       for (i = 0; i < len; i += 4) {
                I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
                data++;
        }
 
-       I915_WRITE(reg, VIDEO_DIP_ENABLE | VIDEO_DIP_SELECT_AVI |
-                  VIDEO_DIP_FREQ_VSYNC | (DIP_LEN_AVI << 8) |
-                  VIDEO_DIP_ENABLE_AVI);
+       flags |= intel_infoframe_flags(frame);
+
+       I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+}
+static void intel_set_infoframe(struct drm_encoder *encoder,
+                               struct dip_infoframe *frame)
+{
+       struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
+
+       if (!intel_hdmi->has_hdmi_sink)
+               return;
+
+       intel_dip_infoframe_csum(frame);
+       intel_hdmi->write_infoframe(encoder, frame);
+}
+
+static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
+{
+       struct dip_infoframe avi_if = {
+               .type = DIP_TYPE_AVI,
+               .ver = DIP_VERSION_AVI,
+               .len = DIP_LEN_AVI,
+       };
+
+       intel_set_infoframe(encoder, &avi_if);
 }
 
 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
@@ -189,10 +244,7 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
        I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
        POSTING_READ(intel_hdmi->sdvox_reg);
 
-       if (HAS_PCH_SPLIT(dev))
-               intel_ironlake_hdmi_set_avi_infoframe(encoder);
-       else
-               intel_hdmi_set_avi_infoframe(encoder);
+       intel_hdmi_set_avi_infoframe(encoder);
 }
 
 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
@@ -470,6 +522,11 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 
        intel_hdmi->sdvox_reg = sdvox_reg;
 
+       if (!HAS_PCH_SPLIT(dev))
+               intel_hdmi->write_infoframe = i9xx_write_infoframe;
+       else
+               intel_hdmi->write_infoframe = ironlake_write_infoframe;
+
        drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 
        intel_hdmi_add_properties(intel_hdmi, connector);