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drm/i915 more registers for S3 (DSPCLK_GATE_D, CACHE_MODE_0, MI_ARB_STATE)

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Failing to preserve the MI_ARB_STATE register was causing FIFO underruns on
the VGA output on my HP 2510p after resume.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Keith Packard 2008-02-16 19:19:29 -08:00 committed by Dave Airlie
parent c0c4261b6f
commit 1f84e550a8
2 changed files with 28 additions and 0 deletions
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18
drivers/char/drm/i915_drv.c
View File

@ -342,6 +342,15 @@ static int i915_suspend(struct drm_device *dev)
dev_priv->saveVCLK_POST_DIV = I915_READ(VCLK_POST_DIV);
dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
/* Clock gating state */
dev_priv->saveDSPCLK_GATE_D = I915_READ(DSPCLK_GATE_D);
/* Cache mode state */
dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
/* Memory Arbitration state */
dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
/* Scratch space */
for (i = 0; i < 16; i++) {
dev_priv->saveSWF0[i] = I915_READ(SWF0 + (i << 2));
@ -489,6 +498,15 @@ static int i915_resume(struct drm_device *dev)
I915_WRITE(VCLK_POST_DIV, dev_priv->saveVCLK_POST_DIV);
udelay(150);
/* Clock gating state */
I915_WRITE (DSPCLK_GATE_D, dev_priv->saveDSPCLK_GATE_D);
/* Cache mode state */
I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
/* Memory arbitration state */
I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);
for (i = 0; i < 16; i++) {
I915_WRITE(SWF0 + (i << 2), dev_priv->saveSWF0[i]);
I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i+7]);

10
drivers/char/drm/i915_drv.h
View File

@ -187,6 +187,9 @@ typedef struct drm_i915_private {
u32 saveIER;
u32 saveIIR;
u32 saveIMR;
u32 saveCACHE_MODE_0;
u32 saveDSPCLK_GATE_D;
u32 saveMI_ARB_STATE;
u32 saveSWF0[16];
u32 saveSWF1[16];
u32 saveSWF2[3];
@ -455,6 +458,10 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
*/
#define DMA_FADD_S 0x20d4
/* Memory Interface Arbitration State
*/
#define MI_ARB_STATE 0x20e4
/* Cache mode 0 reg.
* - Manipulating render cache behaviour is central
* to the concept of zone rendering, tuning this reg can help avoid
@ -465,6 +472,7 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
* bit of interest either set or cleared. EG: (BIT<<16) | BIT to set.
*/
#define Cache_Mode_0 0x2120
#define CACHE_MODE_0 0x2120
#define CM0_MASK_SHIFT 16
#define CM0_IZ_OPT_DISABLE (1<<6)
#define CM0_ZR_OPT_DISABLE (1<<5)
@ -660,6 +668,8 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
/** P1 value is 2 greater than this field */
# define VGA0_PD_P1_MASK (0x1f << 0)
#define DSPCLK_GATE_D 0x6200
/* I830 CRTC registers */
#define HTOTAL_A 0x60000
#define HBLANK_A 0x60004