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>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 40a407f..6abb15f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -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)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 98967f3..d2ef1c2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6286,7 +6286,9 @@
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;