diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-01-11 15:57:23 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-01-26 19:37:13 +0300 |
| commit | a2ce26f815b16500d390fc46381ec770192a5fbe (patch) | |
| tree | dcc171a7e43b36e1cbbfb3055ef06b14e0f75430 /drivers/gpu/drm/drm_edid.c | |
| parent | c8127cf08ab9797c3954df463741ac47039d2b55 (diff) | |
| download | linux-a2ce26f815b16500d390fc46381ec770192a5fbe.tar.xz | |
drm/edid: Introduce drm_hdmi_avi_infoframe_quant_range()
Pull the logic to populate the quantization range information
in the AVI infoframe into a small helper. We'll be adding a bit
more logic to it, and having it in a central place seems like a
good idea since it's based on the CEA-861 spec.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111125725.8086-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 9d0a506fc8ff..bca73a80f156 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4292,6 +4292,32 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, } EXPORT_SYMBOL(drm_hdmi_avi_infoframe_from_display_mode); +/** + * drm_hdmi_avi_infoframe_quant_range() - fill the HDMI AVI infoframe + * quantization range information + * @frame: HDMI AVI infoframe + * @rgb_quant_range: RGB quantization range (Q) + * @rgb_quant_range_selectable: Sink support selectable RGB quantization range (QS) + */ +void +drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame, + enum hdmi_quantization_range rgb_quant_range, + bool rgb_quant_range_selectable) +{ + /* + * CEA-861: + * "A Source shall not send a non-zero Q value that does not correspond + * to the default RGB Quantization Range for the transmitted Picture + * unless the Sink indicates support for the Q bit in a Video + * Capabilities Data Block." + */ + if (rgb_quant_range_selectable) + frame->quantization_range = rgb_quant_range; + else + frame->quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; +} +EXPORT_SYMBOL(drm_hdmi_avi_infoframe_quant_range); + static enum hdmi_3d_structure s3d_structure_from_display_mode(const struct drm_display_mode *mode) { |