From: Alex Deucher <alexdeucher@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: Alex Deucher <alexander.deucher@amd.com>, stable@vger.kernel.org
Subject: [PATCH 1/2] drm/radeon: make sure vertical front porch is at least 1
Date: Tue, 3 May 2016 14:52:13 -0400 [thread overview]
Message-ID: <1462301534-6821-1-git-send-email-alexander.deucher@amd.com> (raw)
hw doesn't like a 0 value.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
drivers/gpu/drm/radeon/atombios_encoders.c | 4 ++++
1 file changed, 4 insertions(+)
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);
--
2.5.5
next reply other threads:[~2016-05-03 18:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-03 18:52 Alex Deucher [this message]
2016-05-03 18:52 ` [PATCH 2/2] drm/amdgpu: make sure vertical front porch is at least 1 Alex Deucher
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