Commit c8127cf0 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

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: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111141835.25369-1-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Acked-by: default avatarEric Anholt <eric@anholt.net>
parent 00147934

drivers/gpu/drm/drm_edid.c

+19 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/gpu/drm/i915/intel_dp.c

+3 −1
Original line number Diff line number Diff line
@@ -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;

drivers/gpu/drm/i915/intel_hdmi.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

drivers/gpu/drm/vc4/vc4_hdmi.c

+3 −1
Original line number Diff line number Diff line
@@ -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

include/drm/drm_edid.h

+2 −0
Original line number Diff line number Diff line
@@ -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,

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