diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2016-05-02 18:53:27 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-06-15 21:28:14 +0100 |
| commit | 2187b4a87421b8adc45b2ec245bf6de81769d802 (patch) | |
| tree | 7df7ab77e860d3e7354c6f100ab427a482aa3ec7 | |
| parent | 26265a03012688a828523a7d6d53b49d6c12ab6e (diff) | |
| download | linux-stable-2187b4a87421b8adc45b2ec245bf6de81769d802.tar.gz linux-stable-2187b4a87421b8adc45b2ec245bf6de81769d802.tar.bz2 linux-stable-2187b4a87421b8adc45b2ec245bf6de81769d802.zip | |
drm/radeon: make sure vertical front porch is at least 1
commit 3104b8128d4d646a574ed9d5b17c7d10752cd70b upstream.
hw doesn't like a 0 value.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_encoders.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index a1a7d071eb17..cd8b34146146 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -90,6 +90,10 @@ static bool radeon_atom_mode_fixup(struct drm_encoder *encoder, && (mode->crtc_vsync_start < (mode->crtc_vdisplay + 2))) adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vdisplay + 2; + /* vertical FP must be at least 1 */ + if (mode->crtc_vsync_start == mode->crtc_vdisplay) + adjusted_mode->crtc_vsync_start++; + /* get the native mode for LVDS */ if (radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT)) radeon_panel_mode_fixup(encoder, adjusted_mode); |