diff options
| author | Thierry Reding <treding@nvidia.com> | 2015-04-08 17:58:07 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2015-08-13 14:47:44 +0300 |
| commit | b8be0bdbd52d35aac30fb2d8c295f9a3000873f2 (patch) | |
| tree | 7d3444fde4229fb16f18ae0fc94cc8daa485d98a /drivers/gpu/drm/tegra | |
| parent | 472a6d1fd5f5d37a1c081e69f5c8ad5307ac358f (diff) | |
| download | linux-b8be0bdbd52d35aac30fb2d8c295f9a3000873f2.tar.xz | |
drm/tegra: dsi: Use proper back-porch for non-sync video mode
In video modes without sync pulses, the horizontal back-porch needs to
include the horizontal sync width.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra')
| -rw-r--r-- | drivers/gpu/drm/tegra/dsi.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index ed970f622903..5c489c257555 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -548,14 +548,19 @@ static void tegra_dsi_configure(struct tegra_dsi *dsi, unsigned int pipe, /* horizontal sync width */ hsw = (mode->hsync_end - mode->hsync_start) * mul / div; - hsw -= 10; /* horizontal back porch */ hbp = (mode->htotal - mode->hsync_end) * mul / div; - hbp -= 14; + + if ((dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) == 0) + hbp += hsw; /* horizontal front porch */ hfp = (mode->hsync_start - mode->hdisplay) * mul / div; + + /* subtract packet overhead */ + hsw -= 10; + hbp -= 14; hfp -= 8; tegra_dsi_writel(dsi, hsw << 16 | 0, DSI_PKT_LEN_0_1); |