drm: add bit depth parsing

EDID 1.4 digital monitors report the bit depth supported in the input
field.  Add support for parsing this out and storing the info in the
display_info structure for use by drivers.

[airlied: tweaked to fix inter-patch dependency]
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 17 insertions, 1 deletions

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index d94684b7ba34..ee1cb7012e56 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -198,6 +198,7 @@ struct drm_display_info {
         unsigned int min_vfreq, max_vfreq;
         unsigned int min_hfreq, max_hfreq;
         unsigned int pixel_clock;
+        unsigned int bpc;
 
         enum subpixel_order subpixel_order;
 
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 5881fad91faa..9b9bf946a208 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -155,7 +155,22 @@ struct detailed_timing {
 #define DRM_EDID_INPUT_SEPARATE_SYNCS  (1 << 3)
 #define DRM_EDID_INPUT_BLANK_TO_BLACK  (1 << 4)
 #define DRM_EDID_INPUT_VIDEO_LEVEL     (3 << 5)
-#define DRM_EDID_INPUT_DIGITAL         (1 << 7) /* bits below must be zero if set */
+#define DRM_EDID_INPUT_DIGITAL         (1 << 7)
+#define DRM_EDID_DIGITAL_DEPTH_MASK    (7 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_UNDEF   (0 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_6       (1 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_8       (2 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_10      (3 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_12      (4 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_14      (5 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_16      (6 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_RSVD    (7 << 4)
+#define DRM_EDID_DIGITAL_TYPE_UNDEF    (0)
+#define DRM_EDID_DIGITAL_TYPE_DVI      (1)
+#define DRM_EDID_DIGITAL_TYPE_HDMI_A   (2)
+#define DRM_EDID_DIGITAL_TYPE_HDMI_B   (3)
+#define DRM_EDID_DIGITAL_TYPE_MDDI     (4)
+#define DRM_EDID_DIGITAL_TYPE_DP       (5)
 
 #define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0)
 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)