On Wed, Feb 01, 2017 at 06:14:38PM +0530, Shashank Sharma wrote:
This patch does following:
- Adds a new structure (drm_hdmi_info) in drm_display_info. This structure will be used to save and indicate if sink supports advance HDMI 2.0 features
- Checks the HF-VSDB block for presence of SCDC, and marks it in hdmi_info structure.
- If SCDC is present, checks if sink is capable of generating scdc read request, and marks it in hdmi_info structure.
Signed-off-by: Shashank Sharma shashank.sharma@intel.com
drivers/gpu/drm/drm_edid.c | 14 ++++++++++++++ include/drm/drm_connector.h | 26 ++++++++++++++++++++++++++ 2 files changed, 40 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 96d3e47..37902e5 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3802,6 +3802,18 @@ enum hdmi_quantization_range } EXPORT_SYMBOL(drm_default_rgb_quant_range);
+static void drm_detect_hdmi_scdc(struct drm_connector *connector,
const u8 *hf_vsdb)+{
- struct drm_hdmi_info *hdmi = &connector->display_info.hdmi_info;
- if (hf_vsdb[6] & 0x80) {
hdmi->scdc_supported = true;if (hf_vsdb[6] & 0x40)hdmi->scdc_rr = true;- }
+}
static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector, const u8 *hdmi) { @@ -3916,6 +3928,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
if (cea_db_is_hdmi_vsdb(db)) drm_parse_hdmi_vsdb_video(connector, db);
if (cea_db_is_hdmi_forum_vsdb(db))drm_detect_hdmi_scdc(connector, db);}
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index e5e1edd..2435598 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -87,6 +87,27 @@ enum subpixel_order { SubPixelVerticalRGB, SubPixelVerticalBGR, SubPixelNone,
+};
+/**
- struct drm_hdmi_info - runtime data about the connected sink
- Describes if a given hdmi display supports advance HDMI 2.0 featutes.
- This information is available in CEA-861-F extension blocks (like
- HF-VSDB)
- For sinks which provide an EDID this can be filled out by calling
- drm_add_edid_modes().
- */
+struct drm_hdmi_info {
- /**
* @scdc_supported: status control & data channel present.*/- bool scdc_supported;
- /**
* @scdc_rr: sink is capable of generating scdc read request.*/- bool scdc_rr;
Probably worth spelling the thing out.
};
/** @@ -188,6 +209,11 @@ struct drm_display_info { * @cea_rev: CEA revision of the HDMI sink. */ u8 cea_rev;
- /**
* @hdmi_info: advance features of a HDMI sink.*/- struct drm_hdmi_info hdmi_info;
};
int drm_display_info_set_bus_formats(struct drm_display_info *info,
1.9.1