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path: root/drivers/gpu/drm/bridge/tc358767.c
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Diffstat (limited to 'drivers/gpu/drm/bridge/tc358767.c')
-rw-r--r--drivers/gpu/drm/bridge/tc358767.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 51664a2df731..da7e35b0893d 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -729,6 +729,8 @@ static int tc_set_video_mode(struct tc_data *tc,
int lower_margin = mode->vsync_start - mode->vdisplay;
int vsync_len = mode->vsync_end - mode->vsync_start;
u32 dp0_syncval;
+ u32 bits_per_pixel = 24;
+ u32 in_bw, out_bw;
/*
* Recommended maximum number of symbols transferred in a transfer unit:
@@ -736,7 +738,10 @@ static int tc_set_video_mode(struct tc_data *tc,
* (output active video bandwidth in bytes))
* Must be less than tu_size.
*/
- max_tu_symbol = TU_SIZE_RECOMMENDED - 1;
+
+ in_bw = mode->clock * bits_per_pixel / 8;
+ out_bw = tc->link.base.num_lanes * tc->link.base.rate;
+ max_tu_symbol = DIV_ROUND_UP(in_bw * TU_SIZE_RECOMMENDED, out_bw);
dev_dbg(tc->dev, "set mode %dx%d\n",
mode->hdisplay, mode->vdisplay);