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drm/edid: Introduce drm_default_rgb_quant_range() 

Make the code selecting the RGB quantization range a little less magicy
by wrapping it up in a small helper.

v2: s/adjusted_mode/mode in vc4 to make it actually compile
v3: Add a comment proposed by Eric

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111141835.25369-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Ville Syrjälä 2017-01-11 16:18:35 +02:00
parent 0014793459
commit c8127cf08a
5 changed files with 29 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/gpu/drm/drm_edid.c
View File

@ -3768,6 +3768,25 @@ bool drm_rgb_quant_range_selectable(struct edid *edid)
}
EXPORT_SYMBOL(drm_rgb_quant_range_selectable);
/**
* drm_default_rgb_quant_range - default RGB quantization range
* @mode: display mode
*
* Determine the default RGB quantization range for the mode,
* as specified in CEA-861.
*
* Return: The default RGB quantization range for the mode
*/
enum hdmi_quantization_range
drm_default_rgb_quant_range(const struct drm_display_mode *mode)
{
/* All CEA modes other than VIC 1 use limited quantization range. */
return drm_match_cea_mode(mode) > 1 ?
HDMI_QUANTIZATION_RANGE_LIMITED :
HDMI_QUANTIZATION_RANGE_FULL;
}
EXPORT_SYMBOL(drm_default_rgb_quant_range);
static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector,
const u8 *hdmi)
{

4
drivers/gpu/drm/i915/intel_dp.c
View File

@ -1713,7 +1713,9 @@ found:
* VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
*/
pipe_config->limited_color_range =
bpp != 18 && drm_match_cea_mode(adjusted_mode) > 1;
bpp != 18 &&
drm_default_rgb_quant_range(adjusted_mode) ==
HDMI_QUANTIZATION_RANGE_LIMITED;
} else {
pipe_config->limited_color_range =
intel_dp->limited_color_range;

3
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -1330,7 +1330,8 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
/* See CEA-861-E - 5.1 Default Encoding Parameters */
pipe_config->limited_color_range =
pipe_config->has_hdmi_sink &&
drm_match_cea_mode(adjusted_mode) > 1;
drm_default_rgb_quant_range(adjusted_mode) ==
HDMI_QUANTIZATION_RANGE_LIMITED;
} else {
pipe_config->limited_color_range =
intel_hdmi->limited_color_range;

4
drivers/gpu/drm/vc4/vc4_hdmi.c
View File

@ -463,7 +463,9 @@ static void vc4_hdmi_encoder_mode_set(struct drm_encoder *encoder,
csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
VC4_HD_CSC_CTL_ORDER);
if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) > 1) {
if (vc4_encoder->hdmi_monitor &&
drm_default_rgb_quant_range(mode) ==
HDMI_QUANTIZATION_RANGE_LIMITED) {
/* CEA VICs other than #1 requre limited range RGB
* output unless overridden by an AVI infoframe.
* Apply a colorspace conversion to squash 0-255 down

2
include/drm/drm_edid.h
View File

@ -441,6 +441,8 @@ enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
bool drm_detect_hdmi_monitor(struct edid *edid);
bool drm_detect_monitor_audio(struct edid *edid);
bool drm_rgb_quant_range_selectable(struct edid *edid);
enum hdmi_quantization_range
drm_default_rgb_quant_range(const struct drm_display_mode *mode);
int drm_add_modes_noedid(struct drm_connector *connector,
int hdisplay, int vdisplay);
void drm_set_preferred_mode(struct drm_connector *connector,