On 22/04/2023 00:07, Kuogee Hsieh wrote:
On 4/20/2023 5:27 PM, Dmitry Baryshkov wrote:
On 21/04/2023 02:25, Kuogee Hsieh wrote:
During DSC preparation, add run time calculation to figure out what
usage modes, split mode and merge mode, is going to be setup.
Signed-off-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 56
++++++++++++++++-------------
1 file changed, 32 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 2fdacf1..5677728 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -529,17 +529,9 @@ void dpu_encoder_helper_split_config(
bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc)
{
struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
- int i, intf_count = 0, num_dsc = 0;
+ struct msm_display_topology *topology = &dpu_enc->topology;
- for (i = 0; i < MAX_PHYS_ENCODERS_PER_VIRTUAL; i++)
- if (dpu_enc->phys_encs[i])
- intf_count++;
-
- /* See dpu_encoder_get_topology, we only support 2:2:1 topology */
- if (dpu_enc->dsc)
- num_dsc = 2;
-
- return (num_dsc > 0) && (num_dsc > intf_count);
+ return (topology->num_dsc > topology->num_intf);
}
static void dpu_encoder_get_topology(
@@ -1861,41 +1853,57 @@ static void dpu_encoder_prep_dsc(struct
dpu_encoder_virt *dpu_enc,
struct dpu_encoder_phys *enc_master = dpu_enc->cur_master;
struct dpu_hw_dsc *hw_dsc[MAX_CHANNELS_PER_ENC];
struct dpu_hw_pingpong *hw_pp[MAX_CHANNELS_PER_ENC];
+ struct msm_display_topology *topology = &dpu_enc->topology;
int this_frame_slices;
int intf_ip_w, enc_ip_w;
- int dsc_common_mode;
+ int dsc_common_mode = 0;
int pic_width;
u32 initial_lines;
+ int num_dsc, num_intf;
int i;
for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
hw_pp[i] = dpu_enc->hw_pp[i];
hw_dsc[i] = dpu_enc->hw_dsc[i];
-
- if (!hw_pp[i] || !hw_dsc[i]) {
- DPU_ERROR_ENC(dpu_enc, "invalid params for DSC\n");
- return;
- }
Why?
MAX_CHANNELS_PER_ENC == 2
This works for dsi since it use 2 dsc encoder.
Since DP only use one dsc encoder, this will cause it return at loop 2
without execute dpu_encoder_dsc_pipe_cfg().
Then the loop should go up to num_dsc rather than MAX_CHANNELS_PER_ENC
}
- dsc_common_mode = 0;
+ num_dsc = topology->num_dsc;
+ num_intf = topology->num_intf;
+
pic_width = dsc->pic_width;
- dsc_common_mode = DSC_MODE_MULTIPLEX | DSC_MODE_SPLIT_PANEL;
if (enc_master->intf_mode == INTF_MODE_VIDEO)
dsc_common_mode |= DSC_MODE_VIDEO;
+ /*
+ * If this encoder is driving more than one DSC encoder, they
+ * operate in tandem, same pic dimension needs to be used by
+ * each of them.(pp-split is assumed to be not supported)
+ *
+ */
+
this_frame_slices = pic_width / dsc->slice_width;
intf_ip_w = this_frame_slices * dsc->slice_width;
+ enc_ip_w = intf_ip_w;
+
+ intf_ip_w /= num_intf;
+
+ if (num_dsc > 1)
+ dsc_common_mode |= DSC_MODE_SPLIT_PANEL;
+
+ if (dpu_encoder_use_dsc_merge(&dpu_enc->base)) {
+ dsc_common_mode |= DSC_MODE_MULTIPLEX;
+ /*
+ * in dsc merge case: when using 2 encoders for the same
+ * stream, no. of slices need to be same on both the
+ * encoders.
+ */
+ enc_ip_w = intf_ip_w / 2;
So do you want to get enc_ip_w / 2 or enc_ip_w / num_intf / 2 here?
enc_ip_w / num_intf / 2
But previously we had enc_ip_w = intf_ip_w / 2. Was it because of the
assumption that num_intf = 1?
+ }
- /*
- * dsc merge case: when using 2 encoders for the same stream,
- * no. of slices need to be same on both the encoders.
- */
- enc_ip_w = intf_ip_w / 2;
initial_lines = dpu_encoder_dsc_initial_line_calc(dsc, enc_ip_w);
- for (i = 0; i < MAX_CHANNELS_PER_ENC; i++)
+ for (i = 0; i < num_dsc; i++)
dpu_encoder_dsc_pipe_cfg(dpu_enc, hw_dsc[i], hw_pp[i], dsc,
dsc_common_mode, initial_lines);
}
--
With best wishes
Dmitry
