From: YİĞİTCAN KAVAKLI <[email protected]> In dsi_op_mode_config(), entering video mode sets DSI_CTRL_VID_MODE_EN without clearing DSI_CTRL_CMD_MODE_EN, and entering command mode sets DSI_CTRL_CMD_MODE_EN without clearing DSI_CTRL_VID_MODE_EN.
Ensure explicit mutual exclusion by clearing the opposing enable bit when switching operational modes to prevent hardware bus collisions. Signed-off-by: YİĞİTCAN KAVAKLI <[email protected]> --- drivers/gpu/drm/msm/dsi/dsi_host.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 7e4e3718b536c92dc555de213042857379499447..b9e2867d435a3ad8b6db6b57c440bbd827180b6e 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -1094,7 +1094,9 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC, DSI_ACTIVE_HSYNC_START(hs_start) | DSI_ACTIVE_HSYNC_END(hs_end)); - dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0); + dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, + DSI_ACTIVE_VSYNC_HPOS_START(hs_start) | + DSI_ACTIVE_VSYNC_HPOS_END(vs_end)); dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS, DSI_ACTIVE_VSYNC_VPOS_START(vs_start) | DSI_ACTIVE_VSYNC_VPOS_END(vs_end)); @@ -1168,8 +1170,10 @@ static void dsi_op_mode_config(struct msm_dsi_host *msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0); } else { if (video_mode) { + dsi_ctrl &= ~DSI_CTRL_CMD_MODE_EN; dsi_ctrl |= DSI_CTRL_VID_MODE_EN; } else { /* command mode */ + dsi_ctrl &= ~DSI_CTRL_VID_MODE_EN; dsi_ctrl |= DSI_CTRL_CMD_MODE_EN; dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1); } -- 2.47.3
