The decision to use DFP output format conversion capabilities should be
during compute_config phase.

This patch adds new member to crtc_state to represent the final
output_format to the sink. In case of a DFP this can be different than
the output_format, as per the format conversion done via the PCON.

This will help to store only the format conversion capabilities of the
DP device in intel_dp->dfp, and use crtc_state to compute and store the
configuration for color/format conversion for a given mode.

v2: modified the new member to crtc_state to represent the final
output_format that eaches the sink, after possible conversion by
PCON kind of devices. (Ville)

v3: Addressed comments from Ville:
-Added comments to clarify difference between sink_format and
output_format.
-Corrected the order of setting sink_format and output_format.
-Added readout for sink_format in get_pipe_config hooks.

v4: Set sink_format for intel_sdvo too. (Ville)

v5: Rebased.

v6: Fixed condition to go for YCbCr420 format for dp and hdmi. (Ville)

Signed-off-by: Ankit Nautiyal <[email protected]>
Reviewed-by: Ville Syrjälä <[email protected]> (v3)
---
 drivers/gpu/drm/i915/display/icl_dsi.c        |  1 +
 drivers/gpu/drm/i915/display/intel_crt.c      |  1 +
 .../drm/i915/display/intel_crtc_state_dump.c  |  5 +--
 drivers/gpu/drm/i915/display/intel_display.c  |  5 +++
 .../drm/i915/display/intel_display_types.h    | 11 ++++++-
 drivers/gpu/drm/i915/display/intel_dp.c       | 33 +++++++++++++------
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  1 +
 drivers/gpu/drm/i915/display/intel_dvo.c      |  1 +
 drivers/gpu/drm/i915/display/intel_hdmi.c     | 23 +++++++------
 drivers/gpu/drm/i915/display/intel_lvds.c     |  1 +
 drivers/gpu/drm/i915/display/intel_sdvo.c     |  1 +
 drivers/gpu/drm/i915/display/intel_tv.c       |  1 +
 drivers/gpu/drm/i915/display/vlv_dsi.c        |  1 +
 13 files changed, 62 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c 
b/drivers/gpu/drm/i915/display/icl_dsi.c
index 50dcaa895854..e8ac4552e681 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1593,6 +1593,7 @@ static int gen11_dsi_compute_config(struct intel_encoder 
*encoder,
                &pipe_config->hw.adjusted_mode;
        int ret;
 
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        ret = intel_panel_compute_config(intel_connector, adjusted_mode);
diff --git a/drivers/gpu/drm/i915/display/intel_crt.c 
b/drivers/gpu/drm/i915/display/intel_crt.c
index 8f2ebead0826..e925e21d87fc 100644
--- a/drivers/gpu/drm/i915/display/intel_crt.c
+++ b/drivers/gpu/drm/i915/display/intel_crt.c
@@ -393,6 +393,7 @@ static int intel_crt_compute_config(struct intel_encoder 
*encoder,
        if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return -EINVAL;
 
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        return 0;
diff --git a/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c 
b/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
index 766633566fd6..185cd1971aa5 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
@@ -178,10 +178,11 @@ void intel_crtc_state_dump(const struct intel_crtc_state 
*pipe_config,
 
        snprintf_output_types(buf, sizeof(buf), pipe_config->output_types);
        drm_dbg_kms(&i915->drm,
-                   "active: %s, output_types: %s (0x%x), output format: %s\n",
+                   "active: %s, output_types: %s (0x%x), output format: %s, 
sink format: %s\n",
                    str_yes_no(pipe_config->hw.active),
                    buf, pipe_config->output_types,
-                   output_formats(pipe_config->output_format));
+                   output_formats(pipe_config->output_format),
+                   output_formats(pipe_config->sink_format));
 
        drm_dbg_kms(&i915->drm,
                    "cpu_transcoder: %s, pipe bpp: %i, dithering: %i\n",
diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 410c84fd905c..6fa86d1e0480 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3127,6 +3127,7 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
                return false;
 
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
+       pipe_config->sink_format = pipe_config->output_format;
        pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
        pipe_config->shared_dpll = NULL;
 
@@ -3586,6 +3587,8 @@ static bool ilk_get_pipe_config(struct intel_crtc *crtc,
                break;
        }
 
+       pipe_config->sink_format = pipe_config->output_format;
+
        pipe_config->gamma_mode = REG_FIELD_GET(TRANSCONF_GAMMA_MODE_MASK_ILK, 
tmp);
 
        pipe_config->framestart_delay = 
REG_FIELD_GET(TRANSCONF_FRAME_START_DELAY_MASK, tmp) + 1;
@@ -3984,6 +3987,8 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
                        bdw_get_pipemisc_output_format(crtc);
        }
 
+       pipe_config->sink_format = pipe_config->output_format;
+
        pipe_config->gamma_mode = intel_de_read(dev_priv,
                                                GAMMA_MODE(crtc->pipe));
 
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h 
b/drivers/gpu/drm/i915/display/intel_display_types.h
index c32bfba06ca1..c9d1863d2765 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1274,9 +1274,18 @@ struct intel_crtc_state {
        /* HDMI High TMDS char rate ratio */
        bool hdmi_high_tmds_clock_ratio;
 
-       /* Output format RGB/YCBCR etc */
+       /*
+        * Output format RGB/YCBCR etc., that is coming out
+        * at the end of the pipe.
+        */
        enum intel_output_format output_format;
 
+       /*
+        * Sink output format RGB/YCBCR etc., that is going
+        * into the sink.
+        */
+       enum intel_output_format sink_format;
+
        /* enable pipe gamma? */
        bool gamma_enable;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index 8e16745275f6..e52e2ffc355c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -819,11 +819,12 @@ u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
 
 static enum intel_output_format
 intel_dp_output_format(struct intel_connector *connector,
-                      bool ycbcr_420_output)
+                      enum intel_output_format sink_format)
 {
        struct intel_dp *intel_dp = intel_attached_dp(connector);
 
-       if (!connector->base.ycbcr_420_allowed || !ycbcr_420_output)
+       if (!connector->base.ycbcr_420_allowed ||
+           sink_format != INTEL_OUTPUT_FORMAT_YCBCR420)
                return INTEL_OUTPUT_FORMAT_RGB;
 
        if (intel_dp->dfp.rgb_to_ycbcr &&
@@ -862,8 +863,14 @@ intel_dp_mode_min_output_bpp(struct intel_connector 
*connector,
                             const struct drm_display_mode *mode)
 {
        const struct drm_display_info *info = &connector->base.display_info;
-       enum intel_output_format output_format =
-               intel_dp_output_format(connector, drm_mode_is_420_only(info, 
mode));
+       enum intel_output_format output_format, sink_format;
+
+       if (drm_mode_is_420_only(info, mode))
+               sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+       else
+               sink_format = INTEL_OUTPUT_FORMAT_RGB;
+
+       output_format = intel_dp_output_format(connector, sink_format);
 
        return intel_dp_output_bpp(output_format, 
intel_dp_min_bpp(output_format));
 }
@@ -2040,23 +2047,29 @@ intel_dp_compute_output_format(struct intel_encoder 
*encoder,
 
        ycbcr_420_only = drm_mode_is_420_only(info, adjusted_mode);
 
-       crtc_state->output_format = intel_dp_output_format(connector, 
ycbcr_420_only);
-
-       if (ycbcr_420_only && !intel_dp_is_ycbcr420(intel_dp, crtc_state)) {
+       if (ycbcr_420_only && !connector->base.ycbcr_420_allowed) {
                drm_dbg_kms(&i915->drm,
                            "YCbCr 4:2:0 mode but YCbCr 4:2:0 output not 
possible. Falling back to RGB.\n");
-               crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
+       } else if (ycbcr_420_only) {
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+       } else {
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        }
 
+       crtc_state->output_format = intel_dp_output_format(connector, 
crtc_state->sink_format);
+
        ret = intel_dp_compute_link_config(encoder, crtc_state, conn_state,
                                           respect_downstream_limits);
        if (ret) {
-               if (intel_dp_is_ycbcr420(intel_dp, crtc_state) ||
+               if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
                    !connector->base.ycbcr_420_allowed ||
                    !drm_mode_is_420_also(info, adjusted_mode))
                        return ret;
 
-               crtc_state->output_format = intel_dp_output_format(connector, 
true);
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+               crtc_state->output_format = intel_dp_output_format(connector,
+                                                                  
crtc_state->sink_format);
                ret = intel_dp_compute_link_config(encoder, crtc_state, 
conn_state,
                                                   respect_downstream_limits);
        }
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c 
b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index a860cbc5dbea..ff0b821a901a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -293,6 +293,7 @@ static int intel_dp_mst_compute_config(struct intel_encoder 
*encoder,
        if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return -EINVAL;
 
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->has_pch_encoder = false;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dvo.c 
b/drivers/gpu/drm/i915/display/intel_dvo.c
index eb2dcd866cc8..9884678743b6 100644
--- a/drivers/gpu/drm/i915/display/intel_dvo.c
+++ b/drivers/gpu/drm/i915/display/intel_dvo.c
@@ -271,6 +271,7 @@ static int intel_dvo_compute_config(struct intel_encoder 
*encoder,
        if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return -EINVAL;
 
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        return 0;
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c 
b/drivers/gpu/drm/i915/display/intel_hdmi.c
index c7e9e1fbed37..1ad0540c13ee 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2171,13 +2171,13 @@ static bool intel_hdmi_has_audio(struct intel_encoder 
*encoder,
 
 static enum intel_output_format
 intel_hdmi_output_format(const struct intel_crtc_state *crtc_state,
-                        struct intel_connector *connector,
-                        bool ycbcr_420_output)
+                        struct intel_connector *connector)
 {
        if (!crtc_state->has_hdmi_sink)
                return INTEL_OUTPUT_FORMAT_RGB;
 
-       if (connector->base.ycbcr_420_allowed && ycbcr_420_output)
+       if (connector->base.ycbcr_420_allowed &&
+           crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420)
                return INTEL_OUTPUT_FORMAT_YCBCR420;
        else
                return INTEL_OUTPUT_FORMAT_RGB;
@@ -2195,23 +2195,26 @@ static int intel_hdmi_compute_output_format(struct 
intel_encoder *encoder,
        bool ycbcr_420_only = drm_mode_is_420_only(info, adjusted_mode);
        int ret;
 
-       crtc_state->output_format =
-               intel_hdmi_output_format(crtc_state, connector, ycbcr_420_only);
-
-       if (ycbcr_420_only && !intel_hdmi_is_ycbcr420(crtc_state)) {
+       if (ycbcr_420_only && !connector->base.ycbcr_420_allowed) {
                drm_dbg_kms(&i915->drm,
                            "YCbCr 4:2:0 mode but YCbCr 4:2:0 output not 
possible. Falling back to RGB.\n");
-               crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
+       } else if (ycbcr_420_only) {
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+       } else {
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        }
 
+       crtc_state->output_format = intel_hdmi_output_format(crtc_state, 
connector);
        ret = intel_hdmi_compute_clock(encoder, crtc_state, 
respect_downstream_limits);
        if (ret) {
-               if (intel_hdmi_is_ycbcr420(crtc_state) ||
+               if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
                    !connector->base.ycbcr_420_allowed ||
                    !drm_mode_is_420_also(info, adjusted_mode))
                        return ret;
 
-               crtc_state->output_format = 
intel_hdmi_output_format(crtc_state, connector, true);
+               crtc_state->sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+               crtc_state->output_format = 
intel_hdmi_output_format(crtc_state, connector);
                ret = intel_hdmi_compute_clock(encoder, crtc_state, 
respect_downstream_limits);
        }
 
diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c 
b/drivers/gpu/drm/i915/display/intel_lvds.c
index a504b3a7fbd5..a7783da37dfd 100644
--- a/drivers/gpu/drm/i915/display/intel_lvds.c
+++ b/drivers/gpu/drm/i915/display/intel_lvds.c
@@ -436,6 +436,7 @@ static int intel_lvds_compute_config(struct intel_encoder 
*encoder,
                crtc_state->pipe_bpp = lvds_bpp;
        }
 
+       crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        /*
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c 
b/drivers/gpu/drm/i915/display/intel_sdvo.c
index e12ba458636c..34ee9dd82a78 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -1351,6 +1351,7 @@ static int intel_sdvo_compute_config(struct intel_encoder 
*encoder,
 
        DRM_DEBUG_KMS("forcing bpc to 8 for SDVO\n");
        pipe_config->pipe_bpp = 8*3;
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        if (HAS_PCH_SPLIT(to_i915(encoder->base.dev)))
diff --git a/drivers/gpu/drm/i915/display/intel_tv.c 
b/drivers/gpu/drm/i915/display/intel_tv.c
index 3b5ff84dc615..6f7ac225293e 100644
--- a/drivers/gpu/drm/i915/display/intel_tv.c
+++ b/drivers/gpu/drm/i915/display/intel_tv.c
@@ -1204,6 +1204,7 @@ intel_tv_compute_config(struct intel_encoder *encoder,
        if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return -EINVAL;
 
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        drm_dbg_kms(&dev_priv->drm, "forcing bpc to 8 for TV\n");
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c 
b/drivers/gpu/drm/i915/display/vlv_dsi.c
index 8d2e6e151ba0..82c30feb7a91 100644
--- a/drivers/gpu/drm/i915/display/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/display/vlv_dsi.c
@@ -280,6 +280,7 @@ static int intel_dsi_compute_config(struct intel_encoder 
*encoder,
        int ret;
 
        drm_dbg_kms(&dev_priv->drm, "\n");
+       pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
        pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
        ret = intel_panel_compute_config(intel_connector, adjusted_mode);
-- 
2.25.1

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