Attachment 62030 Details for Bug 39282 – possible fix

[patch] possible fix

0001-drm-radeon-fix-backend-map-for-barts-LE.patch (text/plain), 3.11 KB, created by Alex Deucher on 2012-05-23 12:10:35 UTC

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Creator: Alex Deucher

Created: 2012-05-23 12:10:35 UTC

Size: 3.11 KB

patch

obsolete

>From d3d66ec1788ef49c89a737494bca35fe51e0391a Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Wed, 23 May 2012 15:08:53 -0400
>Subject: [PATCH] drm/radeon: fix backend map for barts LE
>
>Fixes:
>https://bugs.freedesktop.org/show_bug.cgi?id=39282
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@kernel.org
>---
> drivers/gpu/drm/radeon/evergreen.c |   80 +++++++++++++++++++++++++++++++++++-
> 1 files changed, 79 insertions(+), 1 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
>index 58991af..71cbf6b 100644
>--- a/drivers/gpu/drm/radeon/evergreen.c
>+++ b/drivers/gpu/drm/radeon/evergreen.c
>@@ -1883,7 +1883,10 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
> 		rdev->config.evergreen.sc_earlyz_tile_fifo_size = 0x130;
> 		break;
> 	case CHIP_BARTS:
>-		rdev->config.evergreen.num_ses = 2;
>+		if (rdev->ddev->pdev->device == 0x673e)
>+			rdev->config.evergreen.num_ses = 1;
>+		else
>+			rdev->config.evergreen.num_ses = 2;
> 		rdev->config.evergreen.max_pipes = 4;
> 		rdev->config.evergreen.max_tile_pipes = 8;
> 		rdev->config.evergreen.max_simds = 7;
>@@ -2089,6 +2092,81 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
> 									EVERGREEN_MAX_BACKENDS_MASK));
> 			break;
> 		}
>+	} else if (rdev->ddev->pdev->device == 0x673e) {
>+		/* barts LE */
>+		u32 efuse_straps_4;
>+		u32 efuse_straps_3;
>+		u8 efuse_box_bit_131_124;
>+
>+		WREG32(RCU_IND_INDEX, 0x204);
>+		efuse_straps_4 = RREG32(RCU_IND_DATA);
>+		WREG32(RCU_IND_INDEX, 0x203);
>+		efuse_straps_3 = RREG32(RCU_IND_DATA);
>+		efuse_box_bit_131_124 = (u8)(((efuse_straps_4 & 0xf) << 4) | ((efuse_straps_3 & 0xf0000000) >> 28));
>+
>+		switch(efuse_box_bit_131_124) {
>+		case 0x00:
>+			gb_backend_map = 0x76543210;
>+			break;
>+		case 0x55:
>+			gb_backend_map = 0x76543311;
>+			break;
>+		case 0x65:
>+			gb_backend_map = 0x76543311;
>+			break;
>+		case 0x95:
>+			gb_backend_map = 0x66553311;
>+			break;
>+		case 0xa5:
>+			gb_backend_map = 0x66443311;
>+			break;
>+		case 0x56:
>+			gb_backend_map = 0x77553300;
>+			break;
>+		case 0x66:
>+			gb_backend_map = 0x77443300;
>+			break;
>+		case 0x96:
>+			gb_backend_map = 0x66553300;
>+			break;
>+		case 0xa6:
>+			gb_backend_map = 0x66443300;
>+			break;
>+		case 0x59:
>+			gb_backend_map = 0x77552211;
>+			break;
>+		case 0x69:
>+			gb_backend_map = 0x77442211;
>+			break;
>+		case 0x99:
>+			gb_backend_map = 0x66552211;
>+			break;
>+		case 0xa9:
>+			gb_backend_map = 0x66442211;
>+			break;
>+		case 0x5a:
>+			gb_backend_map = 0x77552200;
>+			break;
>+		case 0x6a:
>+			gb_backend_map = 0x77442200;
>+			break;
>+		case 0x9a:
>+			gb_backend_map = 0x66552200;
>+			break;
>+		case 0xaa:
>+			gb_backend_map = 0x66442200;
>+			break;
>+		default:
>+			DRM_ERROR("bad backend map, using default\n");
>+			gb_backend_map =
>+				evergreen_get_tile_pipe_to_backend_map(rdev,
>+								       rdev->config.evergreen.max_tile_pipes,
>+								       rdev->config.evergreen.max_backends,
>+								       ((EVERGREEN_MAX_BACKENDS_MASK <<
>+								   rdev->config.evergreen.max_backends) &
>+									EVERGREEN_MAX_BACKENDS_MASK));
>+			break;
>+		}
> 	} else {
> 		switch (rdev->family) {
> 		case CHIP_CYPRESS:
>-- 
>1.7.7.5
>

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Attachments on bug 39282: 49177 | 49462 | 49463 | 53473 | 53756 | 53757 | 53814 | 54366 | 54374 | 58893 | 62030 | 62067 | 62543 | 62544 | 62545

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