From: Jun Nie Date: Thu, 30 May 2024 05:56:46 +0000 (+0800) Subject: drm/msm/dpu: adjust data width for widen bus case X-Git-Tag: v6.11-rc1~141^2~4^2~42 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=17236bc0ee0a78d58c03a28c3015b21bde5e445f;p=thirdparty%2Fkernel%2Flinux.git drm/msm/dpu: adjust data width for widen bus case data is valid for only half the active window if widebus is enabled Signed-off-by: Jun Nie Tested-by: Neil Armstrong # on SM8550-QRD Tested-by: Neil Armstrong # on SM8650-QRD Tested-by: Neil Armstrong # on SM8650-HDK Reviewed-by: Dmitry Baryshkov Reviewed-by: Jessica Zhang Patchwork: https://patchwork.freedesktop.org/patch/596229/ Link: https://lore.kernel.org/r/20240530-msm-drm-dsc-dsi-video-upstream-4-v6-2-2ab1d334c657@linaro.org Signed-off-by: Dmitry Baryshkov --- diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c index 225c1c7768ff8..f972214232492 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c @@ -168,6 +168,15 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *intf, data_width = p->width; + /* + * If widebus is enabled, data is valid for only half the active window + * since the data rate is doubled in this mode. But for the compression + * mode in DP case, the p->width is already adjusted in + * drm_mode_to_intf_timing_params() + */ + if (p->wide_bus_en && !dp_intf) + data_width = p->width >> 1; + hsync_data_start_x = hsync_start_x; hsync_data_end_x = hsync_start_x + data_width - 1;