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| author | Alex Deucher <alexander.deucher@amd.com> | 2016-05-02 18:53:27 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-11 11:21:38 +0200 |
| commit | 45225b7e84ee53ffdaeb84970640e9e174bcce0b (patch) | |
| tree | 9a71df0e04652ba8490c02e6f8b0e2f273f40577 | |
| parent | 47b0084c2eedd73c85f378f8bd11c6eb65b8999f (diff) | |
| download | lwn-45225b7e84ee53ffdaeb84970640e9e174bcce0b.tar.gz lwn-45225b7e84ee53ffdaeb84970640e9e174bcce0b.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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 6104d7d7449e..9de6503b10d8 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -310,6 +310,10 @@ 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 scaling */ if (radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT)) { radeon_panel_mode_fixup(encoder, adjusted_mode); |