On Mon, Jul 17, 2017 at 08:06:23PM +0530, Shashank Sharma wrote:
> To get a YCBCR420 output from intel platforms, we need one
> scaler to scale down YCBCR444 samples to YCBCR420 samples.
>
> This patch:
> - Does scaler allocation for HDMI ycbcr420 outputs.
> - Programs PIPE_MISC register for ycbcr420 output.
> - Adds a new scaler user "HDMI output" to plug-into existing
> scaler framework. This output type is identified using bit
> 30 of the scaler users bitmap.
With the code change this became also stale.
>
> V2: rebase
> V3: rebase
> V4: rebase
> V5: addressed review comments from Ander:
> - No need to check both scaler_user && hdmi_output.
> Check for scaler_user is enough.
> V6: rebase
> V7: Do not create a new scaler user, use existing pipe scaler user.
> V8: rebase
> V9: Addressed review comments from Ville:
> - Remove leftover comment for HDMI scaler user.
> - Remove unnecessary blank line.
> - Make scaler alocation failure a DEBUG log instead of ERROR.
> Added r-b from Ville
>
> Cc: Ville Syrjala <ville.syrj...@linux.intel.com>
> Cc: Ander Conselvan De Oliveira <conselv...@gmail.com>
>
> Reviewed-by: Ville Syrjala <ville.syrj...@linux.intel.com>
> Signed-off-by: Shashank Sharma <shashank.sha...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 3 +++
> drivers/gpu/drm/i915/intel_hdmi.c | 12 ++++++++++++
> drivers/gpu/drm/i915/intel_panel.c | 3 ++-
> 3 files changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index a5140e4..d78f1c2 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4624,6 +4624,9 @@ skl_update_scaler(struct intel_crtc_state *crtc_state,
> bool force_detach,
> */
> need_scaling = src_w != dst_w || src_h != dst_h;
>
> + if (crtc_state->ycbcr420 && scaler_user == SKL_CRTC_INDEX)
> + need_scaling = true;
> +
> /*
> * Scaling/fitting not supported in IF-ID mode in GEN9+
> * TODO: Interlace fetch mode doesn't support YUV420 planar formats.
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c
> b/drivers/gpu/drm/i915/intel_hdmi.c
> index 64bb8cc..6addef5 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1354,6 +1354,8 @@ intel_hdmi_ycbcr420_config(struct drm_connector
> *connector,
> struct intel_crtc_state *config,
> int *clock_12bpc, int *clock_8bpc)
> {
> + struct intel_crtc *intel_crtc = to_intel_crtc(config->base.crtc);
> +
> if (!connector->ycbcr_420_allowed) {
> DRM_ERROR("Platform doesn't support YCBCR420 output\n");
> return false;
> @@ -1364,6 +1366,16 @@ intel_hdmi_ycbcr420_config(struct drm_connector
> *connector,
> *clock_12bpc /= 2;
> *clock_8bpc /= 2;
> config->ycbcr420 = true;
> +
> + /* YCBCR 420 output conversion needs a scaler */
> + if (skl_update_scaler_crtc(config)) {
> + DRM_DEBUG_KMS("Scaler allocation for output failed\n");
> + return false;
> + }
> +
> + intel_pch_panel_fitting(intel_crtc, config,
> + DRM_MODE_SCALE_FULLSCREEN);
> +
> return true;
> }
>
> diff --git a/drivers/gpu/drm/i915/intel_panel.c
> b/drivers/gpu/drm/i915/intel_panel.c
> index 96c2cbd..fd2e081 100644
> --- a/drivers/gpu/drm/i915/intel_panel.c
> +++ b/drivers/gpu/drm/i915/intel_panel.c
> @@ -110,7 +110,8 @@ intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
>
> /* Native modes don't need fitting */
> if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w &&
> - adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h)
> + adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h &&
> + !pipe_config->ycbcr420)
> goto done;
>
> switch (fitting_mode) {
> --
> 2.7.4
>
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