Re: [PATCH v9 01/14] drm/i915/display: Add new member to configure PCON color conversion

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On Mon, Feb 20, 2023 at 05:53:48PM +0530, Ankit Nautiyal wrote:
> 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.
> 
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> (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       | 34 +++++++++++++------
>  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     | 24 +++++++------
>  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(+), 25 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
> index def3aff4d717..2d17b2a7e1d5 100644
> --- a/drivers/gpu/drm/i915/display/icl_dsi.c
> +++ b/drivers/gpu/drm/i915/display/icl_dsi.c
> @@ -1575,6 +1575,7 @@ 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 0bb429d3e8d7..cc44f0629f2c 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -3103,6 +3103,7 @@ 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;
>  
> @@ -3562,6 +3563,8 @@ 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;
> @@ -3960,6 +3963,8 @@ 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 748b0cd411fa..c28835d9db6f 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1273,9 +1273,18 @@ 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 b77bd4565864..81fbef30c469 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -806,11 +806,12 @@ 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 &&
> @@ -849,8 +850,14 @@ 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));
>  }
> @@ -2036,23 +2043,28 @@ 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) ||
> -		    !connector->base.ycbcr_420_allowed ||
> +		if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
>  		    !drm_mode_is_420_also(info, adjusted_mode))

still looks broken to me.

>  			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 de856f4375fb..054b179d0b6a 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -284,6 +284,7 @@ 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..c0ae618360c3 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 +2195,25 @@ 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) ||
> -		    !connector->base.ycbcr_420_allowed ||
> +		if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
>  		    !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

-- 
Ville Syrjälä
Intel



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