On 4/5/2023 12:27 PM, Dmitry Baryshkov wrote:
On 05/04/2023 03:41, Jessica Zhang wrote:
Use MSM and DRM DSC helper methods to configure DSC for DSI.
Changes in V2:
- *_calculate_initial_scale_value --> *_set_initial_scale_value
- Split pkt_per_line and eol_byte_num changes to a separate patch
- Moved pclk_per_line calculation to hdisplay adjustment in `if (dsc)`
block of dsi_update_dsc_timing()
Changes in v3:
- Split pclk_per_intf calculation into a separate patch
- Added slice_width check to dsi_timing_setup
- Used MSM DSC helper to calculate total_bytes_per_intf
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c
b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 74d38f90398a..6a6218a9655f 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -28,6 +28,7 @@
#include "dsi.xml.h"
#include "sfpb.xml.h"
#include "dsi_cfg.h"
+#include "msm_dsc_helper.h"
#include "msm_kms.h"
#include "msm_gem.h"
#include "phy/dsi_phy.h"
@@ -848,7 +849,7 @@ static void dsi_update_dsc_timing(struct
msm_dsi_host *msm_host, bool is_cmd_mod
/* first calculate dsc parameters and then program
* compress mode registers
*/
- slice_per_intf = DIV_ROUND_UP(hdisplay, dsc->slice_width);
+ slice_per_intf = msm_dsc_get_slice_per_intf(dsc, hdisplay);
/*
* If slice_count is greater than slice_per_intf
@@ -858,7 +859,7 @@ static void dsi_update_dsc_timing(struct
msm_dsi_host *msm_host, bool is_cmd_mod
if (dsc->slice_count > slice_per_intf)
dsc->slice_count = 1;
- total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
+ total_bytes_per_intf = msm_dsc_get_bytes_per_intf(dsc, hdisplay);
eol_byte_num = total_bytes_per_intf % 3;
pkt_per_line = slice_per_intf / dsc->slice_count;
@@ -936,6 +937,12 @@ static void dsi_timing_setup(struct msm_dsi_host
*msm_host, bool is_bonded_dsi)
return;
}
+ if (!dsc->slice_width || (mode->hdisplay < dsc->slice_width)) {
+ pr_err("DSI: invalid slice width %d (pic_width: %d)\n",
+ dsc->slice_width, mode->hdisplay);
+ return;
+ }
This is not the "use of MSM and DRM DSC helper methods" and thus should
be moved to a separate patch.
Hi Dmitry,
Acked.
Thanks,
Jessica Zhang
+
dsc->pic_width = mode->hdisplay;
dsc->pic_height = mode->vdisplay;
DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);
@@ -1759,7 +1766,7 @@ static int dsi_populate_dsc_params(struct
msm_dsi_host *msm_host, struct drm_dsc
return ret;
}
- dsc->initial_scale_value = 32;
+ drm_dsc_set_initial_scale_value(dsc);
dsc->line_buf_depth = dsc->bits_per_component + 1;
return drm_dsc_compute_rc_parameters(dsc);
--
With best wishes
Dmitry
