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drm/i915: set FDI RX TU size to match transmit size

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This allows FDI error checking to work.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Jesse Barnes 2010-09-10 11:27:03 -07:00 committed by Chris Wilson
parent de9c27bf70
commit c64e311e65
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/i915/intel_display.c
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@ -1857,12 +1857,18 @@ static void ironlake_fdi_enable(struct drm_crtc *crtc)
int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
int fdi_tx_reg = (pipe == 0) ? FDI_TXA_CTL : FDI_TXB_CTL;
int fdi_rx_reg = (pipe == 0) ? FDI_RXA_CTL : FDI_RXB_CTL;
int data_m1_reg = (pipe == 0) ? PIPEA_DATA_M1 : PIPEB_DATA_M1;
u32 temp;
u32 pipe_bpc;
u32 tx_size;
temp = I915_READ(pipeconf_reg);
pipe_bpc = temp & PIPE_BPC_MASK;
/* Write the TU size bits so error detection works */
tx_size = I915_READ(data_m1_reg) & TU_SIZE_MASK;
I915_WRITE(FDI_RXA_TUSIZE1, tx_size);
/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
temp = I915_READ(fdi_rx_reg);
/*