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drm/radeon: fix dram timing for certain hawaii boards

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Certain memory configurations need a fix.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-11-07 12:51:04 -05:00
parent 1c52279f57
commit 21b8a36904
1 changed files with 29 additions and 0 deletions
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29
drivers/gpu/drm/radeon/ci_dpm.c
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@ -2071,6 +2071,33 @@ static int ci_force_switch_to_arb_f0(struct radeon_device *rdev)
return ni_copy_and_switch_arb_sets(rdev, tmp, MC_CG_ARB_FREQ_F0);
}
static void ci_register_patching_mc_arb(struct radeon_device *rdev,
const u32 engine_clock,
const u32 memory_clock,
u32 *dram_timimg2)
{
bool patch;
u32 tmp, tmp2;
tmp = RREG32(MC_SEQ_MISC0);
patch = ((tmp & 0x0000f00) == 0x300) ? true : false;
if (patch &&
((rdev->pdev->device == 0x67B0) ||
(rdev->pdev->device == 0x67B1))) {
if ((memory_clock > 100000) && (memory_clock <= 125000)) {
tmp2 = (((0x31 * engine_clock) / 125000) - 1) & 0xff;
*dram_timimg2 &= ~0x00ff0000;
*dram_timimg2 |= tmp2 << 16;
} else if ((memory_clock > 125000) && (memory_clock <= 137500)) {
tmp2 = (((0x36 * engine_clock) / 137500) - 1) & 0xff;
*dram_timimg2 &= ~0x00ff0000;
*dram_timimg2 |= tmp2 << 16;
}
}
}
static int ci_populate_memory_timing_parameters(struct radeon_device *rdev,
u32 sclk,
u32 mclk,
@ -2086,6 +2113,8 @@ static int ci_populate_memory_timing_parameters(struct radeon_device *rdev,
dram_timing2 = RREG32(MC_ARB_DRAM_TIMING2);
burst_time = RREG32(MC_ARB_BURST_TIME) & STATE0_MASK;
ci_register_patching_mc_arb(rdev, sclk, mclk, &dram_timing2);
arb_regs->McArbDramTiming = cpu_to_be32(dram_timing);
arb_regs->McArbDramTiming2 = cpu_to_be32(dram_timing2);
arb_regs->McArbBurstTime = (u8)burst_time;