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Message-Id: <1462823777-8384-39-git-send-email-kamal@canonical.com> Date: Mon, 9 May 2016 12:55:56 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Alex Deucher <alexander.deucher@....com>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 4.2.y-ckt 38/59] drm/amdgpu: make sure vertical front porch is at least 1 4.2.8-ckt10 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Alex Deucher <alexander.deucher@....com> commit 0126d4b9a516256f2432ca0dc78ab293a8255378 upstream. hw doesn't like a 0 value. Signed-off-by: Alex Deucher <alexander.deucher@....com> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/gpu/drm/amd/amdgpu/atombios_encoders.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c index e605574..3ea2ad1 100644 --- 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(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 (amdgpu_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT)) amdgpu_panel_mode_fixup(encoder, adjusted_mode); -- 2.7.4
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