In order to support state readout for DP VSC SDP, we need to have a structure which holds DP VSC SDP payload data such as "union hdmi_infoframe drm" which is used for DRM infoframe. It adds a struct drm_dp_vsc_sdp vsc to intel_crtc_state.infoframes.
And it stores computed dp vsc sdp to infoframes.vsc of crtc state. While computing we'll also fill out the inforames.enable bitmask appropriately.
The compute routine follows DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16 through DB18].
v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
Signed-off-by: Gwan-gyeong Mun gwan-gyeong.mun@intel.com --- .../drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_dp.c | 92 +++++++++++++++++++ 2 files changed, 93 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 7ae0bc8b80d1..7997c307026d 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -997,6 +997,7 @@ struct intel_crtc_state { union hdmi_infoframe spd; union hdmi_infoframe hdmi; union hdmi_infoframe drm; + struct drm_dp_vsc_sdp vsc; } infoframes;
/* HDMI scrambling status */ diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index f4dede6253f8..2bdc43c80e03 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2372,6 +2372,97 @@ static bool intel_dp_port_has_audio(struct drm_i915_private *dev_priv, return true; }
+static void intel_dp_compute_vsc_colorimetry(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, + struct drm_dp_vsc_sdp *vsc) +{ + /* + * Prepare VSC Header for SU as per DP 1.4 spec, Table 2-118 + * VSC SDP supporting 3D stereo, PSR2, and Pixel Encoding/ + * Colorimetry Format indication. + */ + vsc->revision = 0x5; + vsc->length = 0x13; + + /* DP 1.4a spec, Table 2-120 */ + switch (crtc_state->output_format) { + case INTEL_OUTPUT_FORMAT_YCBCR444: + vsc->colorspace = DP_COLORSPACE_YUV444; + break; + case INTEL_OUTPUT_FORMAT_YCBCR420: + vsc->colorspace = DP_COLORSPACE_YUV420; + break; + case INTEL_OUTPUT_FORMAT_RGB: + default: + vsc->colorspace = DP_COLORSPACE_RGB; + } + + switch (conn_state->colorspace) { + case DRM_MODE_COLORIMETRY_BT709_YCC: + vsc->colorimetry = DP_COLORIMETRY_BT709_YCC; + break; + case DRM_MODE_COLORIMETRY_XVYCC_601: + vsc->colorimetry = DP_COLORIMETRY_XVYCC_601; + break; + case DRM_MODE_COLORIMETRY_XVYCC_709: + vsc->colorimetry = DP_COLORIMETRY_XVYCC_709; + break; + case DRM_MODE_COLORIMETRY_SYCC_601: + vsc->colorimetry = DP_COLORIMETRY_SYCC_601; + break; + case DRM_MODE_COLORIMETRY_OPYCC_601: + vsc->colorimetry = DP_COLORIMETRY_OPYCC_601; + break; + case DRM_MODE_COLORIMETRY_BT2020_CYCC: + vsc->colorimetry = DP_COLORIMETRY_BT2020_CYCC; + break; + case DRM_MODE_COLORIMETRY_BT2020_RGB: + vsc->colorimetry = DP_COLORIMETRY_BT2020_RGB; + break; + case DRM_MODE_COLORIMETRY_BT2020_YCC: + vsc->colorimetry = DP_COLORIMETRY_BT2020_YCC; + break; + case DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65: + case DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER: + vsc->colorimetry = DP_COLORIMETRY_DCI_P3_RGB; + break; + default: + /* + * RGB->YCBCR color conversion uses the BT.709 + * color space. + */ + if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) + vsc->colorimetry = DP_COLORIMETRY_BT709_YCC; + else + vsc->colorimetry = DP_COLORIMETRY_DEFAULT; + break; + } + + vsc->bpc = crtc_state->pipe_bpp / 3; + /* all YCbCr are always limited range */ + vsc->dynamic_range = DP_DYNAMIC_RANGE_CTA; + vsc->content_type = DP_CONTENT_TYPE_NOT_DEFINED; +} + +static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp, + struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct drm_dp_vsc_sdp *vsc = &crtc_state->infoframes.vsc; + + /* When PSR is enabled, VSC SDP is handled by PSR routine */ + if (intel_psr_enabled(intel_dp)) + return; + + if (!intel_dp_needs_vsc_sdp(crtc_state, conn_state)) + return; + + crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_VSC); + vsc->sdp_type = DP_SDP_VSC; + intel_dp_compute_vsc_colorimetry(crtc_state, conn_state, + &crtc_state->infoframes.vsc); +} + int intel_dp_compute_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, @@ -2477,6 +2568,7 @@ intel_dp_compute_config(struct intel_encoder *encoder, intel_dp_set_clock(encoder, pipe_config);
intel_psr_compute_config(intel_dp, pipe_config); + intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
return 0; }