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From: Jun Nie <jun.nie@linaro.org>
Date: Thu, 30 May 2024 13:56:49 +0800
Subject: [PATCH v6 5/6] drm/msm/dsi: set VIDEO_COMPRESSION_MODE_CTRL_WC
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Message-Id: <20240530-msm-drm-dsc-dsi-video-upstream-4-v6-5-2ab1d334c657@linaro.org>
References: <20240530-msm-drm-dsc-dsi-video-upstream-4-v6-0-2ab1d334c657@linaro.org>
In-Reply-To: <20240530-msm-drm-dsc-dsi-video-upstream-4-v6-0-2ab1d334c657@linaro.org>
To: Rob Clark <robdclark@gmail.com>, 
 Abhinav Kumar <quic_abhinavk@quicinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, Sean Paul <sean@poorly.run>, 
 Marijn Suijten <marijn.suijten@somainline.org>, 
 David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>, 
 Jessica Zhang <quic_jesszhan@quicinc.com>, Vinod Koul <vkoul@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, 
 freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, 
 Jun Nie <jun.nie@linaro.org>, Jonathan Marek <jonathan@marek.ca>, 
 Neil Armstrong <neil.armstrong@linaro.org>

From: Jonathan Marek <jonathan@marek.ca>

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>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 47f5858334f6..7252d36687e6 100644
--- 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);
 	}
 }

-- 
2.34.1