[3.19.y-ckt stable] Patch "drm/radeon: make sure vertical front porch is at least 1" has been added to the 3.19.y-ckt tree
Kamal Mostafa
kamal at canonical.com
Tue May 10 00:03:39 UTC 2016
This is a note to let you know that I have just added a patch titled
drm/radeon: make sure vertical front porch is at least 1
to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree
which can be found at:
https://git.launchpad.net/~canonical-kernel/linux/+git/linux-stable-ckt/log/?h=linux-3.19.y-queue
This patch is scheduled to be released in version 3.19.8-ckt21.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
---8<------------------------------------------------------------
>From fae66a388dc34b5227cd280c089029c993c8b1ef Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Mon, 2 May 2016 18:53:27 -0400
Subject: 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 at amd.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
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 d70de30..7cc216b 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -309,6 +309,10 @@ 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);
--
2.7.4
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