From: Alex Deucher Date: Mon, 2 May 2016 22:53:27 +0000 (-0400) Subject: drm/radeon: make sure vertical front porch is at least 1 X-Git-Tag: v4.6-rc7~17^2~1^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3104b8128d4d646a574ed9d5b17c7d10752cd70b;p=platform%2Fkernel%2Flinux-exynos.git drm/radeon: make sure vertical front porch is at least 1 hw doesn't like a 0 value. Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index edd05cd..587cae4 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);