[PATCH RFC v2 5/6] drm/msm/dsi: Use MSM and DRM DSC helper methods

[Jessica Zhang]

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()

Signed-off-by: Jessica Zhang <quic_jessz...@quicinc.com>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 11 ++++++++---
 1 file changed, 8 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..b7ab81737473 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
@@ -951,7 +952,11 @@ static void dsi_timing_setup(struct msm_dsi_host 
*msm_host, bool is_bonded_dsi)
                 * pulse width same
                 */
                h_total -= hdisplay;
-               hdisplay /= 3;
+               if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO)
+                       hdisplay = msm_dsc_get_uncompressed_pclk_per_line(dsc, 
hdisplay,
+                                       dsi_get_bpp(msm_host->format)) / 3;
+               else
+                       hdisplay /= 3;
                h_total += hdisplay;
                ha_end = ha_start + hdisplay;
        }
@@ -1759,7 +1764,7 @@ 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);

-- 
2.39.2