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Date: Sun, 12 Jun 2016 22:34:42 +0100 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Alex Deucher" <alexander.deucher@....com> Subject: [PATCH 3.2 37/46] drm/radeon: make sure vertical front porch is at least 1 3.2.81-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher <alexander.deucher@....com> commit 3104b8128d4d646a574ed9d5b17c7d10752cd70b upstream. hw doesn't like a 0 value. Signed-off-by: Alex Deucher <alexander.deucher@....com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- drivers/gpu/drm/radeon/atombios_encoders.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -90,6 +90,10 @@ static bool radeon_atom_mode_fixup(struc && (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 LVDS */ if (radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT)) radeon_panel_mode_fixup(encoder, adjusted_mode);
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