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drm/radeon: fix for memory training on bonaire 0x6649

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Workaround for memory link training on certain variants
of 0x6649.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-11-07 12:00:25 -05:00
parent 34fc0b58d9
commit 9feb3dda5c
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/radeon/cik.c
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@ -1806,7 +1806,7 @@ int ci_mc_load_microcode(struct radeon_device *rdev)
{
const __be32 *fw_data = NULL;
const __le32 *new_fw_data = NULL;
u32 running, blackout = 0;
u32 running, blackout = 0, tmp;
u32 *io_mc_regs = NULL;
const __le32 *new_io_mc_regs = NULL;
int i, regs_size, ucode_size;
@ -1866,6 +1866,15 @@ int ci_mc_load_microcode(struct radeon_device *rdev)
WREG32(MC_SEQ_IO_DEBUG_DATA, io_mc_regs[(i << 1) + 1]);
}
}
tmp = RREG32(MC_SEQ_MISC0);
if ((rdev->pdev->device == 0x6649) && ((tmp & 0xff00) == 0x5600)) {
WREG32(MC_SEQ_IO_DEBUG_INDEX, 5);
WREG32(MC_SEQ_IO_DEBUG_DATA, 0x00000023);
WREG32(MC_SEQ_IO_DEBUG_INDEX, 9);
WREG32(MC_SEQ_IO_DEBUG_DATA, 0x000001f0);
}
/* load the MC ucode */
for (i = 0; i < ucode_size; i++) {
if (rdev->new_fw)