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Commit 5ff55717 authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/radeon/kms: fix r300 vram width calculations 



This was incorrect according to the docs and the UMS driver does
it like this.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent a17538f9

drivers/gpu/drm/radeon/r300.c

+7 −4
Original line number Diff line number Diff line
@@ -506,11 +506,14 @@ void r300_vram_info(struct radeon_device *rdev) 


	/* DDR for all card after R300 & IGP */

	rdev->mc.vram_is_ddr = true;



	tmp = RREG32(RADEON_MEM_CNTL);

	if (tmp & R300_MEM_NUM_CHANNELS_MASK) {

		rdev->mc.vram_width = 128;

	} else {

		rdev->mc.vram_width = 64;

	tmp &= R300_MEM_NUM_CHANNELS_MASK;

	switch (tmp) {

	case 0: rdev->mc.vram_width = 64; break;

	case 1: rdev->mc.vram_width = 128; break;

	case 2: rdev->mc.vram_width = 256; break;

	default:  rdev->mc.vram_width = 128; break;

	}



	r100_vram_init_sizes(rdev);