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i915: Save/restore MCHBAR_RENDER_STANDBY on GM965/GM45

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This register is set by the 2D driver to prevent lockups, and so it needs to
be preserved across suspend/resume too. This makes my X200s work.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Keith Packard 2008-11-02 23:08:44 -08:00 committed by Dave Airlie
parent 3ad4f59705
commit 881ee9889c
3 changed files with 13 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -157,6 +157,7 @@ typedef struct drm_i915_private {
u32 saveDSPACNTR;
u32 saveDSPBCNTR;
u32 saveDSPARB;
u32 saveRENDERSTANDBY;
u32 savePIPEACONF;
u32 savePIPEBCONF;
u32 savePIPEASRC;

3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -527,6 +527,9 @@
#define C0DRB3 0x10206
#define C1DRB3 0x10606
/** GM965 GM45 render standby register */
#define MCHBAR_RENDER_STANDBY 0x111B8
/*
* Overlay regs
*/

9
drivers/gpu/drm/i915/i915_suspend.c
View File

@ -240,6 +240,10 @@ int i915_save_state(struct drm_device *dev)
pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
/* Render Standby */
if (IS_I965G(dev) && IS_MOBILE(dev))
dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);
/* Display arbitration control */
dev_priv->saveDSPARB = I915_READ(DSPARB);
@ -365,6 +369,11 @@ int i915_restore_state(struct drm_device *dev)
pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
/* Render Standby */
if (IS_I965G(dev) && IS_MOBILE(dev))
I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);
/* Display arbitration */
I915_WRITE(DSPARB, dev_priv->saveDSPARB);
/* Pipe & plane A info */