drm/msm/dsi: set VIDEO_COMPRESSION_MODE_CTRL_WC

Video mode DSC won't work if this field is not set correctly. Set it to fix
video mode DSC (for slice_per_pkt==1 cases at least).

Fixes: 08802f515c3c ("drm/msm/dsi: Add support for DSC configuration")
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/596234/
Link: https://lore.kernel.org/r/20240530-msm-drm-dsc-dsi-video-upstream-4-v6-5-2ab1d334c657@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 47f5858334f6118f35480b55ef4d79a932bbbbb6..7252d36687e61fce7a650bd550cefd119b1ee159 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -857,6 +857,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
        u32 slice_per_intf, total_bytes_per_intf;
        u32 pkt_per_line;
        u32 eol_byte_num;
+       u32 bytes_per_pkt;
 
        /* first calculate dsc parameters and then program
         * compress mode registers
@@ -864,6 +865,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
        slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
 
        total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
+       bytes_per_pkt = dsc->slice_chunk_size; /* * slice_per_pkt; */
 
        eol_byte_num = total_bytes_per_intf % 3;
 
@@ -901,6 +903,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
                dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
                dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
        } else {
+               reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_WC(bytes_per_pkt);
                dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
        }
 }