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Commit b1e3a6d1 authored by Michel Dänzer's avatar Michel Dänzer Committed by Dave Airlie
Browse files

drm/radeon: Clear surface registers at initialization time. 



Some PowerMac firmwares set up a tiling surface at the beginning of VRAM
which messes us up otherwise.

Signed-off-by: default avatarMichel Dänzer <daenzer@vmware.com>
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent 696d4df1

drivers/gpu/drm/radeon/radeon_device.c

+20 −0
Original line number Diff line number Diff line
@@ -34,6 +34,23 @@ 
#include "radeon_asic.h"

#include "atom.h"



/*

 * Clear GPU surface registers.

 */

static void radeon_surface_init(struct radeon_device *rdev)

{

	/* FIXME: check this out */

	if (rdev->family < CHIP_R600) {

		int i;



		for (i = 0; i < 8; i++) {

			WREG32(RADEON_SURFACE0_INFO +

			       i * (RADEON_SURFACE1_INFO - RADEON_SURFACE0_INFO),

			       0);

		}

	}

}



/*

 * GPU scratch registers helpers function.

 */
@@ -496,6 +513,9 @@ int radeon_device_init(struct radeon_device *rdev, 
	radeon_errata(rdev);

	/* Initialize scratch registers */

	radeon_scratch_init(rdev);

	/* Initialize surface registers */

	radeon_surface_init(rdev);



	/* TODO: disable VGA need to use VGA request */

	/* BIOS*/

	if (!radeon_get_bios(rdev)) {