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Commit d56ef9c8 authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

drm/radeon/kms/atom: Fix DVO support 



DVO in 12 bit mode (which seems to be the most common
config) requires 2x ppll.

Fixes fdo bug 21857.

Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 8f552a66

drivers/gpu/drm/radeon/atombios_crtc.c

+8 −2
Original line number Diff line number Diff line
@@ -483,8 +483,14 @@ void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode) 
		atom_execute_table(rdev->mode_info.atom_context,

				   index, (uint32_t *)&adjust_pll_args);

		adjusted_clock = le16_to_cpu(adjust_pll_args.usPixelClock) * 10;

	} else

	} else {

		/* DVO wants 2x pixel clock if the DVO chip is in 12 bit mode */

		if (ASIC_IS_AVIVO(rdev) &&

		    (radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1))

			adjusted_clock = mode->clock * 2;

		else

			adjusted_clock = mode->clock;

	}



	if (radeon_crtc->crtc_id == 0)

		pll = &rdev->clock.p1pll;