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drm/i915: diasable clock gating for the panel power sequencer

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Needed on Ibex Peak and Cougar Point or the panel won't always come on.

Cc: stable@kernel.org
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 2010-10-07 16:01:25 -07:00 committed by Chris Wilson
parent 298b0b392c
commit 382b093627
2 changed files with 10 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_reg.h
View file

@ -2784,6 +2784,9 @@
#define FDI_RX_PHASE_SYNC_POINTER_ENABLE (1)
#define FDI_RX_CHICKEN(pipe) _PIPE(pipe, FDI_RXA_CHICKEN, FDI_RXB_CHICKEN)
#define SOUTH_DSPCLK_GATE_D 0xc2020
#define PCH_DPLSUNIT_CLOCK_GATE_DISABLE (1<<29)
/* CPU: FDI_TX */
#define FDI_TXA_CTL 0x60100
#define FDI_TXB_CTL 0x61100

7
drivers/gpu/drm/i915/intel_display.c
View file

@ -5745,6 +5745,13 @@ void intel_init_clock_gating(struct drm_device *dev)
I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);
/*
* On Ibex Peak and Cougar Point, we need to disable clock
* gating for the panel power sequencer or it will fail to
* start up when no ports are active.
*/
I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
/*
* According to the spec the following bits should be set in
* order to enable memory self-refresh