Attachment 5904 Details for Bug 7119 – Fully disable CP writeback

[patch] Fully disable CP writeback

drm-radeon-really-disable-wb.diff (text/plain), 1.37 KB, created by Michel Dänzer on 2006-06-14 01:54:04 UTC

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Creator: Michel Dänzer

Created: 2006-06-14 01:54:04 UTC

Size: 1.37 KB

patch

obsolete

>Index: shared-core/radeon_cp.c
>===================================================================
>RCS file: /cvs/dri/drm/shared-core/radeon_cp.c,v
>retrieving revision 1.76
>diff -p -u -r1.76 radeon_cp.c
>--- shared-core/radeon_cp.c	18 May 2006 07:32:37 -0000	1.76
>+++ shared-core/radeon_cp.c	14 Jun 2006 08:46:39 -0000
>@@ -1258,6 +1280,12 @@ static void radeon_test_writeback(drm_ra
> 		dev_priv->writeback_works = 0;
> 		DRM_INFO("writeback forced off\n");
> 	}
>+
>+	if (!dev_priv->writeback_works) {
>+		/* Disable writeback to avoid unnecessary bus master transfers */
>+		RADEON_WRITE(RADEON_CP_RB_CNTL, RADEON_READ(RADEON_CP_RB_CNTL) | RADEON_RB_NO_UPDATE);
>+		RADEON_WRITE(RADEON_SCRATCH_UMSK, 0);
>+	}
> }
> 
> /* Enable or disable PCI-E GART on the chip */
>Index: shared-core/radeon_drv.h
>===================================================================
>RCS file: /cvs/dri/drm/shared-core/radeon_drv.h,v
>retrieving revision 1.71
>diff -p -u -r1.71 radeon_drv.h
>--- shared-core/radeon_drv.h	24 May 2006 18:36:24 -0000	1.71
>+++ shared-core/radeon_drv.h	14 Jun 2006 08:46:40 -0000
>@@ -679,6 +686,7 @@ extern int r300_do_cp_cmdbuf(drm_device_
> #define RADEON_CP_RB_BASE		0x0700
> #define RADEON_CP_RB_CNTL		0x0704
> #	define RADEON_BUF_SWAP_32BIT		(2 << 16)
>+#	define RADEON_RB_NO_UPDATE		(1 << 27)
> #define RADEON_CP_RB_RPTR_ADDR		0x070c
> #define RADEON_CP_RB_RPTR		0x0710
> #define RADEON_CP_RB_WPTR		0x0714

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