Message ID | 20170111125725.8086-5-ville.syrjala@linux.intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
On Wed, 11 Jan 2017, ville.syrjala@linux.intel.com wrote: > From: Ville Syrjälä <ville.syrjala@linux.intel.com> > > HDMI 2.0 recommends that we set the Q bits in the AVI infoframe > even when the sink does not support quantization range selection (QS=0). > According to CEA-861 we can do that as long as the Q we send matches > the default quantization range for the mode. > > Previosuly I think I had misread the spec as saying that you can't ^^^^^^^^^^ > send a non-zero Q at all when QS=0. But that's not what the spec > actually says. Agreed. Reviewed-by: Jani Nikula <jani.nikula@intel.com> > > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > --- > drivers/gpu/drm/drm_edid.c | 8 +++++++- > drivers/gpu/drm/i915/intel_hdmi.c | 6 ++++-- > drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +- > include/drm/drm_edid.h | 1 + > 4 files changed, 13 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c > index 548c20250b95..caa2435bac31 100644 > --- a/drivers/gpu/drm/drm_edid.c > +++ b/drivers/gpu/drm/drm_edid.c > @@ -4295,11 +4295,13 @@ 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 > + * @mode: DRM display mode > * @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, > + const struct drm_display_mode *mode, > enum hdmi_quantization_range rgb_quant_range, > bool rgb_quant_range_selectable) > { > @@ -4309,8 +4311,12 @@ drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame, > * 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." > + * > + * HDMI 2.0 recommends sending non-zero Q when it does match the > + * default RGB quantization range for the mode, even when QS=0. > */ > - if (rgb_quant_range_selectable) > + if (rgb_quant_range_selectable || > + rgb_quant_range == drm_default_rgb_quant_range(mode)) > frame->quantization_range = rgb_quant_range; > else > frame->quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c > index 351f837b09a0..af16b0fa6b69 100644 > --- a/drivers/gpu/drm/i915/intel_hdmi.c > +++ b/drivers/gpu/drm/i915/intel_hdmi.c > @@ -455,17 +455,19 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder, > const struct intel_crtc_state *crtc_state) > { > struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder); > + const struct drm_display_mode *adjusted_mode = > + &crtc_state->base.adjusted_mode; > union hdmi_infoframe frame; > int ret; > > ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, > - &crtc_state->base.adjusted_mode); > + adjusted_mode); > if (ret < 0) { > DRM_ERROR("couldn't fill AVI infoframe\n"); > return; > } > > - drm_hdmi_avi_infoframe_quant_range(&frame.avi, > + drm_hdmi_avi_infoframe_quant_range(&frame.avi, adjusted_mode, > crtc_state->limited_color_range ? > HDMI_QUANTIZATION_RANGE_LIMITED : > HDMI_QUANTIZATION_RANGE_FULL, > diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c > index a588156b5410..f38fdbac2878 100644 > --- a/drivers/gpu/drm/vc4/vc4_hdmi.c > +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c > @@ -356,7 +356,7 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder) > return; > } > > - drm_hdmi_avi_infoframe_quant_range(&frame.avi, > + drm_hdmi_avi_infoframe_quant_range(&frame.avi, mode, > vc4_encoder->limited_rgb_range ? > HDMI_QUANTIZATION_RANGE_LIMITED : > HDMI_QUANTIZATION_RANGE_FULL, > diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h > index cfad4d89589f..43fb0ac5eb9c 100644 > --- a/include/drm/drm_edid.h > +++ b/include/drm/drm_edid.h > @@ -347,6 +347,7 @@ 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, > + const struct drm_display_mode *mode, > enum hdmi_quantization_range rgb_quant_range, > bool rgb_quant_range_selectable);
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 548c20250b95..caa2435bac31 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4295,11 +4295,13 @@ 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 + * @mode: DRM display mode * @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, + const struct drm_display_mode *mode, enum hdmi_quantization_range rgb_quant_range, bool rgb_quant_range_selectable) { @@ -4309,8 +4311,12 @@ drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame, * 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." + * + * HDMI 2.0 recommends sending non-zero Q when it does match the + * default RGB quantization range for the mode, even when QS=0. */ - if (rgb_quant_range_selectable) + if (rgb_quant_range_selectable || + rgb_quant_range == drm_default_rgb_quant_range(mode)) frame->quantization_range = rgb_quant_range; else frame->quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 351f837b09a0..af16b0fa6b69 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -455,17 +455,19 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder, const struct intel_crtc_state *crtc_state) { struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder); + const struct drm_display_mode *adjusted_mode = + &crtc_state->base.adjusted_mode; union hdmi_infoframe frame; int ret; ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, - &crtc_state->base.adjusted_mode); + adjusted_mode); if (ret < 0) { DRM_ERROR("couldn't fill AVI infoframe\n"); return; } - drm_hdmi_avi_infoframe_quant_range(&frame.avi, + drm_hdmi_avi_infoframe_quant_range(&frame.avi, adjusted_mode, crtc_state->limited_color_range ? HDMI_QUANTIZATION_RANGE_LIMITED : HDMI_QUANTIZATION_RANGE_FULL, diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index a588156b5410..f38fdbac2878 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -356,7 +356,7 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder) return; } - drm_hdmi_avi_infoframe_quant_range(&frame.avi, + drm_hdmi_avi_infoframe_quant_range(&frame.avi, mode, vc4_encoder->limited_rgb_range ? HDMI_QUANTIZATION_RANGE_LIMITED : HDMI_QUANTIZATION_RANGE_FULL, diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index cfad4d89589f..43fb0ac5eb9c 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -347,6 +347,7 @@ 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, + const struct drm_display_mode *mode, enum hdmi_quantization_range rgb_quant_range, bool rgb_quant_range_selectable);