diff options
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 26 | ||||
| -rw-r--r-- | include/drm/drm_edid.h | 4 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 520d0ec64add..8f946c383232 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4853,6 +4853,32 @@ 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) { diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 6989b1a44f08..50a8e4d04aeb 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -346,6 +346,10 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, int drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame, const struct drm_display_mode *mode); +void +drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame, + enum hdmi_quantization_range rgb_quant_range, + bool rgb_quant_range_selectable); /** * drm_eld_mnl - Get ELD monitor name length in bytes. |