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Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 61453724c7d4..520d0ec64add 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4244,6 +4244,25 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector, drm_parse_ycbcr420_deep_color_info(connector, hf_vsdb); } +/** + * 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) { |