When BT.2020 Colorimetry output is used for DP, we should program BT.2020
Colorimetry to MSA and VSC SDP. It adds output_colorspace to
intel_crtc_state struct as a place holder of pipe's output colorspace.
In order to distinguish needed colorimetry for VSC SDP, it adds
intel_dp_needs_vsc_sdp function.
If the output colorspace requires vsc sdp or output format is YCbCr 4:2:0,
it uses MSA with VSC SDP.
As per DP 1.4a spec section 2.2.4.3 [MSA Field for Indication of
Color Encoding Format and Content Color Gamut] while sending
BT.2020 Colorimetry signals we should program MSA MISC1 fields which
indicate VSC SDP for the Pixel Encoding/Colorimetry Format.
v2: Remove useless parentheses
v3: Addressed review comments from Ville
- In order to checking output format and output colorspace on
intel_dp_needs_vsc_sdp(), it passes entire intel_crtc_state struct
value.
- Remove a pointless variable.
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 7 +++--
.../drm/i915/display/intel_display_types.h | 3 ++
drivers/gpu/drm/i915/display/intel_dp.c | 29 ++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_dp.h | 1 +
4 files changed, 36 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 98d69febd8e3..8dc030650801 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1737,11 +1737,12 @@ void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state)
/*
* As per DP 1.4a spec section 2.2.4.3 [MSA Field for Indication
* of Color Encoding Format and Content Color Gamut] while sending
- * YCBCR 420 signals we should program MSA MISC1 fields which
- * indicate VSC SDP for the Pixel Encoding/Colorimetry Format.
+ * YCBCR 420, HDR BT.2020 signals we should program MSA MISC1 fields
+ * which indicate VSC SDP for the Pixel Encoding/Colorimetry Format.
*/
- if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+ if (intel_dp_needs_vsc_sdp(crtc_state))
temp |= TRANS_MSA_USE_VSC_SDP;
+
I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
}
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index d5cc4b810d9e..4108570907d4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -971,6 +971,9 @@ struct intel_crtc_state {
/* Output format RGB/YCBCR etc */
enum intel_output_format output_format;
+ /* Output colorspace sRGB/BT.2020 etc */
+ u32 output_colorspace;
+
/* Output down scaling is done in LSPCON device */
bool lspcon_downsampling;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index a2a0214f771a..3a8aef1c6036 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2187,6 +2187,8 @@ intel_dp_compute_config(struct intel_encoder *encoder,
pipe_config->has_pch_encoder = true;
pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
+ pipe_config->output_colorspace = intel_conn_state->base.colorspace;
+
if (lspcon->active)
lspcon_ycbcr420_config(&intel_connector->base, pipe_config);
else
@@ -4448,6 +4450,31 @@ u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
return 0;
}
+bool
+intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state)
+{
+ /*
+ * As per DP 1.4a spec section 2.2.4.3 [MSA Field for Indication
+ * of Color Encoding Format and Content Color Gamut], in order to
+ * sending YCBCR 420 or HDR BT.2020 signals we should use DP VSC SDP.
+ */
+ if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+ return true;
+
+ switch (crtc_state->output_colorspace) {
+ case DRM_MODE_COLORIMETRY_SYCC_601:
+ case DRM_MODE_COLORIMETRY_OPYCC_601:
+ case DRM_MODE_COLORIMETRY_BT2020_YCC:
+ case DRM_MODE_COLORIMETRY_BT2020_RGB:
+ case DRM_MODE_COLORIMETRY_BT2020_CYCC:
+ return true;
+ default:
+ break;
+ }
+
+ return false;
+}
+
static void
intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
@@ -4576,7 +4603,7 @@ void intel_dp_vsc_enable(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
- if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420)
+ if (!intel_dp_needs_vsc_sdp(crtc_state))
return;
intel_dp_setup_vsc_sdp(intel_dp, crtc_state, conn_state);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index be13cb395ef8..87883d0d5977 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -112,6 +112,7 @@ bool intel_dp_read_dpcd(struct intel_dp *intel_dp);
bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp);
int intel_dp_link_required(int pixel_clock, int bpp);
int intel_dp_max_data_rate(int max_link_clock, int max_lanes);
+bool intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state);
void intel_dp_vsc_enable(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state);
--
2.23.0
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