linux-kernel - [PATCH v2 2/6] drm/msm/dsi: set video mode widebus enable bit when widebus is enabled

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Date:   Tue, 14 Nov 2023 17:58:30 -0500
From:   Jonathan Marek <jonathan@...ek.ca>
To:     freedreno@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Jiasheng Jiang <jiasheng@...as.ac.cn>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 2/6] drm/msm/dsi: set video mode widebus enable bit when widebus is enabled

The value returned by msm_dsi_wide_bus_enabled() doesn't match what the
driver is doing in video mode. Fix that by actually enabling widebus for
video mode.

Fixes: efcbd6f9cdeb ("drm/msm/dsi: Enable widebus for DSI")
Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
 drivers/gpu/drm/msm/dsi/dsi.xml.h  | 1 +
 drivers/gpu/drm/msm/dsi/dsi_host.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.xml.h b/drivers/gpu/drm/msm/dsi/dsi.xml.h
index 2a7d980e12c3..f0b3cdc020a1 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.xml.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.xml.h
@@ -231,6 +231,7 @@ static inline uint32_t DSI_VID_CFG0_TRAFFIC_MODE(enum dsi_traffic_mode val)
 #define DSI_VID_CFG0_HSA_POWER_STOP				0x00010000
 #define DSI_VID_CFG0_HBP_POWER_STOP				0x00100000
 #define DSI_VID_CFG0_HFP_POWER_STOP				0x01000000
+#define DSI_VID_CFG0_DATABUS_WIDEN				0x02000000
 #define DSI_VID_CFG0_PULSE_MODE_HSA_HE				0x10000000
 
 #define REG_DSI_VID_CFG1					0x0000001c
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index deeecdfd6c4e..f2c1cbd08d4d 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -745,6 +745,8 @@ static void dsi_ctrl_enable(struct msm_dsi_host *msm_host,
 		data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
 		data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
 		data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
+		if (msm_dsi_host_is_wide_bus_enabled(&msm_host->base))
+			data |= DSI_VID_CFG0_DATABUS_WIDEN;
 		dsi_write(msm_host, REG_DSI_VID_CFG0, data);
 
 		/* Do not swap RGB colors */
-- 
2.26.1