[PATCH 1/2] drm/edid: Store all supported hdmi deep color modes in drm_display_info

[Alex Deucher]

From: Mario Kleiner <mario.kleiner...@gmail.com>

HDMI deep color setup must know which modes are supported if
it needs to degrade gracefully, as only 12 bpc / dc_36 is
guaranteed, but 10 bpc / dc_30 is optional. The maximum bpc
is not sufficient for this.

Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/drm_edid.c | 3 +++
 include/drm/drm_crtc.h     | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 7be2178..dfa9769 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3471,18 +3471,21 @@ static bool drm_assign_hdmi_deep_color_info(struct edid 
*edid,

                        if (hdmi[6] & DRM_EDID_HDMI_DC_30) {
                                dc_bpc = 10;
+                               info->edid_hdmi_dc_modes |= DRM_EDID_HDMI_DC_30;
                                DRM_DEBUG("%s: HDMI sink does deep color 30.\n",
                                                  connector->name);
                        }

                        if (hdmi[6] & DRM_EDID_HDMI_DC_36) {
                                dc_bpc = 12;
+                               info->edid_hdmi_dc_modes |= DRM_EDID_HDMI_DC_36;
                                DRM_DEBUG("%s: HDMI sink does deep color 36.\n",
                                                  connector->name);
                        }

                        if (hdmi[6] & DRM_EDID_HDMI_DC_48) {
                                dc_bpc = 16;
+                               info->edid_hdmi_dc_modes |= DRM_EDID_HDMI_DC_48;
                                DRM_DEBUG("%s: HDMI sink does deep color 48.\n",
                                                  connector->name);
                        }
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 6c295df..d5288b2 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -120,6 +120,9 @@ struct drm_display_info {
        enum subpixel_order subpixel_order;
        u32 color_formats;

+       /* Mask of supported hdmi deep color modes */
+       u8 edid_hdmi_dc_modes;
+
        u8 cea_rev;
 };

-- 
1.8.3.1