[PATCH 2/3] Restructure output format computation for better expandability

From: Werner Sembach
Date: Mon May 03 2021 - 09:30:40 EST


---
drivers/gpu/drm/i915/display/intel_hdmi.c | 65 ++++++++++++-----------
1 file changed, 34 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 576d3d910d06..2c3b545d5f24 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -1999,29 +1999,6 @@ static bool hdmi_deep_color_possible(const struct intel_crtc_state *crtc_state,
INTEL_OUTPUT_FORMAT_YCBCR420);
}

-static int
-intel_hdmi_ycbcr420_config(struct intel_crtc_state *crtc_state,
- const struct drm_connector_state *conn_state)
-{
- struct drm_connector *connector = conn_state->connector;
- struct drm_i915_private *i915 = to_i915(connector->dev);
- const struct drm_display_mode *adjusted_mode =
- &crtc_state->hw.adjusted_mode;
-
- if (!drm_mode_is_420_only(&connector->display_info, adjusted_mode))
- return 0;
-
- if (!connector->ycbcr_420_allowed) {
- drm_err(&i915->drm,
- "Platform doesn't support YCBCR420 output\n");
- return -EINVAL;
- }
-
- crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420;
-
- return intel_pch_panel_fitting(crtc_state, conn_state);
-}
-
static int intel_hdmi_compute_bpc(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state,
int clock)
@@ -2128,6 +2105,30 @@ static bool intel_hdmi_has_audio(struct intel_encoder *encoder,
return intel_conn_state->force_audio == HDMI_AUDIO_ON;
}

+static int intel_hdmi_compute_output_format(struct intel_encoder *encoder,
+ struct intel_crtc_state *crtc_state,
+ const struct drm_connector_state *conn_state)
+{
+ struct drm_connector *connector = conn_state->connector;
+ struct drm_i915_private *i915 = to_i915(connector->dev);
+ const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+ int ret;
+ bool ycbcr_420_only;
+
+ ycbcr_420_only = drm_mode_is_420_only(&connector->display_info, adjusted_mode);
+ if (connector->ycbcr_420_allowed && ycbcr_420_only)
+ crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+ else {
+ if (!connector->ycbcr_420_allowed && ycbcr_420_only)
+ drm_err(&i915->drm, "Display only supports YCbCr420 output, but connector does not allow it. Fallback to RGB, but this will likely fail.\n");
+ crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
+ }
+
+ ret = intel_hdmi_compute_clock(encoder, crtc_state);
+
+ return ret;
+}
+
int intel_hdmi_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state)
@@ -2152,23 +2153,25 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
pipe_config->pixel_multiplier = 2;

- ret = intel_hdmi_ycbcr420_config(pipe_config, conn_state);
- if (ret)
- return ret;
-
- pipe_config->limited_color_range =
- intel_hdmi_limited_color_range(pipe_config, conn_state);
-
if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv))
pipe_config->has_pch_encoder = true;

pipe_config->has_audio =
intel_hdmi_has_audio(encoder, pipe_config, conn_state);

- ret = intel_hdmi_compute_clock(encoder, pipe_config);
+ ret = intel_hdmi_compute_output_format(encoder, pipe_config, conn_state);
if (ret)
return ret;

+ if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
+ ret = intel_pch_panel_fitting(pipe_config, conn_state);
+ if (ret)
+ return ret;
+ }
+
+ pipe_config->limited_color_range =
+ intel_hdmi_limited_color_range(pipe_config, conn_state);
+
if (conn_state->picture_aspect_ratio)
adjusted_mode->picture_aspect_ratio =
conn_state->picture_aspect_ratio;
--
2.25.1