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Commit 6b5f7a68 authored by Alex Deucher's avatar Alex Deucher Committed by Greg Kroah-Hartman
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drm/radeon: make sure vertical front porch is at least 1 



commit 3104b8128d4d646a574ed9d5b17c7d10752cd70b upstream.

hw doesn't like a 0 value.

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0f5c3afc

drivers/gpu/drm/radeon/atombios_encoders.c

+4 −0
Original line number Diff line number Diff line
@@ -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);