From: Jonathan Marek <jonat...@marek.ca>
Add width change in DPU timing for DSC compression case to work with
DSI video mode.
Signed-off-by: Jonathan Marek <jonat...@marek.ca>
Signed-off-by: Jun Nie <jun....@linaro.org>
Tested-by: Neil Armstrong <neil.armstr...@linaro.org> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstr...@linaro.org> # on SM8650-QRD
Tested-by: Neil Armstrong <neil.armstr...@linaro.org> # on SM8650-HDK
Reviewed-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
Reviewed-by: Jessica Zhang <quic_jessz...@quicinc.com>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 8 ++++++++
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 18 ++++++++++++++++++
3 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 119f3ea50a7c..48cef6e79c70 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -564,7 +564,7 @@ bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc)
return (num_dsc > 0) && (num_dsc > intf_count);
}
-static struct drm_dsc_config *dpu_encoder_get_dsc_config(struct drm_encoder
*drm_enc)
+struct drm_dsc_config *dpu_encoder_get_dsc_config(struct drm_encoder *drm_enc)
{
struct msm_drm_private *priv = drm_enc->dev->dev_private;
struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index 002e89cc1705..2167c46c1a45 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -334,6 +334,14 @@ static inline enum dpu_3d_blend_mode
dpu_encoder_helper_get_3d_blend_mode(
*/
unsigned int dpu_encoder_helper_get_dsc(struct dpu_encoder_phys *phys_enc);
+/**
+ * dpu_encoder_get_dsc_config - get DSC config for the DPU encoder
+ * This helper function is used by physical encoder to get DSC config
+ * used for this encoder.
+ * @drm_enc: Pointer to encoder structure
+ */
+struct drm_dsc_config *dpu_encoder_get_dsc_config(struct drm_encoder *drm_enc);
+
/**
* dpu_encoder_get_drm_fmt - return DRM fourcc format
* @phys_enc: Pointer to physical encoder structure
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
index ef69c2f408c3..925ec6ada0e1 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
@@ -11,6 +11,7 @@
#include "dpu_trace.h"
#include "disp/msm_disp_snapshot.h"
+#include <drm/display/drm_dsc_helper.h>
#include <drm/drm_managed.h>
#define DPU_DEBUG_VIDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \
@@ -115,6 +116,23 @@ static void drm_mode_to_intf_timing_params(
timing->h_front_porch = timing->h_front_porch >> 1;
timing->hsync_pulse_width = timing->hsync_pulse_width >> 1;
}
+
+ /*
+ * for DSI, if compression is enabled, then divide the horizonal active
+ * timing parameters by compression ratio. bits of 3 components(R/G/B)
+ * is compressed into bits of 1 pixel.
+ */
+ if (phys_enc->hw_intf->cap->type != INTF_DP && timing->compression_en) {
+ struct drm_dsc_config *dsc =
+ dpu_encoder_get_dsc_config(phys_enc->parent);
+ /*
+ * TODO: replace drm_dsc_get_bpp_int with logic to handle
+ * fractional part if there is fraction
+ */
+ timing->width = timing->width * drm_dsc_get_bpp_int(dsc) /
+ (dsc->bits_per_component * 3);
+ timing->xres = timing->width;
+ }
}
static u32 get_horizontal_total(const struct dpu_hw_intf_timing_params *timing)
--
2.34.1
