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.
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.
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_atomic.c | 6 ++++++
drivers/gpu/drm/i915/intel_display.c | 23 +++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 10 +++++++++-
drivers/gpu/drm/i915/intel_hdmi.c | 12 ++++++++++++
drivers/gpu/drm/i915/intel_panel.c | 3 ++-
5 files changed, 52 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 36d4e63..040d111 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -264,6 +264,12 @@ int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
/* panel fitter case: assign as a crtc scaler */
scaler_id = &scaler_state->scaler_id;
+ } else if (i == SKL_420_OUTPUT_INDEX) {
+ name = "YCBCR420-OUTPUT";
+ idx = intel_crtc->base.base.id;
+
+ /* YCBCR420 case: needs a pipe scaler */
+ scaler_id = &scaler_state->scaler_id;
} else {
name = "PLANE";
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 01900e1..c56081e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4621,6 +4621,9 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
*/
need_scaling = src_w != dst_w || src_h != dst_h;
+ if (scaler_user == SKL_420_OUTPUT_INDEX)
+ need_scaling = true;
+
/*
* if plane is being disabled or scaler is no more required or force detach
* - free scaler binded to this plane/crtc
@@ -4668,6 +4671,26 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
}
/**
+ * skl_update_scaler_crtc_420_output - Stages update to scaler state
+ * for YCBCR420 which needs a scaler, for downsampling.
+ *
+ * @state: crtc's scaler state
+ *
+ * Return
+ * 0 - scaler_usage updated successfully
+ * error - requested scaling cannot be supported or other error condition
+ */
+int skl_update_scaler_crtc_420_output(struct intel_crtc_state *state)
+{
+ const struct drm_display_mode *mode = &state->base.adjusted_mode;
+
+ return skl_update_scaler(state, !state->base.active,
+ SKL_420_OUTPUT_INDEX, &state->scaler_state.scaler_id,
+ state->pipe_src_w, state->pipe_src_h,
+ mode->crtc_hdisplay, mode->crtc_vdisplay);
+}
+
+/**
* skl_update_scaler_crtc - Stages update to scaler state for a given crtc.
*
* @state: crtc's scaler state
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 592243b..68b4fba 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -471,7 +471,8 @@ struct intel_crtc_scaler_state {
*
* If a bit is set, a user is using a scaler.
* Here user can be a plane or crtc as defined below:
- * bits 0-30 - plane (bit position is index from drm_plane_index)
+ * bits 0-29 - plane (bit position is index from drm_plane_index)
+ * bit 30 - hdmi output
* bit 31 - crtc
*
* Instead of creating a new index to cover planes and crtc, using
@@ -484,6 +485,12 @@ struct intel_crtc_scaler_state {
* avilability.
*/
#define SKL_CRTC_INDEX 31
+
+ /*
+ * YCBCR 420 output consume a scaler. So adding a user
+ * for 420 output requirement.
+ */
+#define SKL_420_OUTPUT_INDEX 30
unsigned scaler_users;
/* scaler used by crtc for panel fitting purpose */
@@ -1483,6 +1490,7 @@ void intel_mode_from_pipe_config(struct drm_display_mode *mode,
struct intel_crtc_state *pipe_config);
int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state);
+int skl_update_scaler_crtc_420_output(struct intel_crtc_state *state);
int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state);
static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *state)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 276d916..9e8d784 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1355,6 +1355,7 @@ 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");
@@ -1366,6 +1367,17 @@ 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_420_output(config)) {
+ DRM_ERROR("Scaler allocation for output failed\n");
+ return false;
+ }
+
+ /* Bind this scaler to pipe */
+ 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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