Patch "drm/amdgpu: make sure vertical front porch is at least 1" has been added to the 4.5-stable tree

Patch "drm/amdgpu: make sure vertical front porch is at least 1" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/amdgpu: make sure vertical front porch is at least 1

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-make-sure-vertical-front-porch-is-at-least-1.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 0126d4b9a516256f2432ca0dc78ab293a8255378 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 2 May 2016 18:54:39 -0400
Subject: drm/amdgpu: make sure vertical front porch is at least 1

From: Alex Deucher <alexander.deucher@amd.com>

commit 0126d4b9a516256f2432ca0dc78ab293a8255378 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>

---
 drivers/gpu/drm/amd/amdgpu/atombios_encoders.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
@@ -298,6 +298,10 @@ bool amdgpu_atombios_encoder_mode_fixup(
 	    && (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 (amdgpu_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT))
 		amdgpu_panel_mode_fixup(encoder, adjusted_mode);


Patches currently in stable-queue which might be from alexander.deucher@amd.com are

queue-4.5/drm-radeon-make-sure-vertical-front-porch-is-at-least-1.patch
queue-4.5/drm-amdgpu-set-metadata-pointer-to-null-after-freeing.patch
queue-4.5/drm-amdgpu-make-sure-vertical-front-porch-is-at-least-1.patch