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drm/i915: set more FBC chicken bits 

Add a couple of missing workaround bits for ILK & SNB.  These disable
clock gating on a couple of units that would otherwise prevent FBC from
working.

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 2011-01-17 13:35:57 -08:00 committed by Chris Wilson
parent e6f597a142
commit 1ffa325bac
2 changed files with 5 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_reg.h
View File

@ -2626,6 +2626,8 @@
#define DISPLAY_PORT_PLL_BIOS_2 0x46014
#define PCH_DSPCLK_GATE_D 0x42020
# define DPFCUNIT_CLOCK_GATE_DISABLE (1 << 9)
# define DPFCRUNIT_CLOCK_GATE_DISABLE (1 << 8)
# define DPFDUNIT_CLOCK_GATE_DISABLE (1 << 7)
# define DPARBUNIT_CLOCK_GATE_DISABLE (1 << 5)

4
drivers/gpu/drm/i915/intel_display.c
View File

@ -6286,7 +6286,9 @@ void intel_enable_clock_gating(struct drm_device *dev)
if (IS_GEN5(dev)) {
/* Required for FBC */
dspclk_gate |= DPFDUNIT_CLOCK_GATE_DISABLE;
dspclk_gate |= DPFCUNIT_CLOCK_GATE_DISABLE |
DPFCRUNIT_CLOCK_GATE_DISABLE |
DPFDUNIT_CLOCK_GATE_DISABLE;
/* Required for CxSR */
dspclk_gate |= DPARBUNIT_CLOCK_GATE_DISABLE;