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authorZou Nan hai <nanhai.zou@intel.com>2010-06-25 13:40:23 +0800
committerEric Anholt <eric@anholt.net>2010-08-09 11:34:12 -0700
commitaa40d6bbb9cf88f3fb296a57e046a52e9a68ab72 (patch)
tree1e3509cc6d080309414ff430374b5b21e1902d20
parent1cafd34731cd14e5a72edaf0f41717c8126cfce9 (diff)
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drm/i915: Set up a render context on Ironlake
RC6 power state requires a logical render context in place for saving render context. Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Signed-off-by: Eric Anholt <eric@anholt.net>
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h1
-rw-r--r--drivers/gpu/drm/i915/i915_reg.h11
-rw-r--r--drivers/gpu/drm/i915/intel_display.c53
3 files changed, 55 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 8df6ac73518..047cd7ce7e1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -254,6 +254,7 @@ typedef struct drm_i915_private {
drm_local_map_t hws_map;
struct drm_gem_object *seqno_obj;
struct drm_gem_object *pwrctx;
+ struct drm_gem_object *renderctx;
struct resource mch_res;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 21fd657663a..a63e9a17638 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -181,6 +181,12 @@
#define MI_DISPLAY_FLIP MI_INSTR(0x14, 2)
#define MI_DISPLAY_FLIP_I915 MI_INSTR(0x14, 1)
#define MI_DISPLAY_FLIP_PLANE(n) ((n) << 20)
+#define MI_SET_CONTEXT MI_INSTR(0x18, 0)
+#define MI_MM_SPACE_GTT (1<<8)
+#define MI_MM_SPACE_PHYSICAL (0<<8)
+#define MI_SAVE_EXT_STATE_EN (1<<3)
+#define MI_RESTORE_EXT_STATE_EN (1<<2)
+#define MI_RESTORE_INHIBIT (1<<0)
#define MI_STORE_DWORD_IMM MI_INSTR(0x20, 1)
#define MI_MEM_VIRTUAL (1 << 22) /* 965+ only */
#define MI_STORE_DWORD_INDEX MI_INSTR(0x21, 1)
@@ -1101,6 +1107,11 @@
#define PEG_BAND_GAP_DATA 0x14d68
/*
+ * Logical Context regs
+ */
+#define CCID 0x2180
+#define CCID_EN (1<<0)
+/*
* Overlay regs
*/
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 53f3a98cc1a..4668e9bf67d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5466,37 +5466,37 @@ static const struct drm_mode_config_funcs intel_mode_funcs = {
};
static struct drm_gem_object *
-intel_alloc_power_context(struct drm_device *dev)
+intel_alloc_context_page(struct drm_device *dev)
{
- struct drm_gem_object *pwrctx;
+ struct drm_gem_object *ctx;
int ret;
- pwrctx = i915_gem_alloc_object(dev, 4096);
- if (!pwrctx) {
+ ctx = i915_gem_alloc_object(dev, 4096);
+ if (!ctx) {
DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
return NULL;
}
mutex_lock(&dev->struct_mutex);
- ret = i915_gem_object_pin(pwrctx, 4096);
+ ret = i915_gem_object_pin(ctx, 4096);
if (ret) {
DRM_ERROR("failed to pin power context: %d\n", ret);
goto err_unref;
}
- ret = i915_gem_object_set_to_gtt_domain(pwrctx, 1);
+ ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
if (ret) {
DRM_ERROR("failed to set-domain on power context: %d\n", ret);
goto err_unpin;
}
mutex_unlock(&dev->struct_mutex);
- return pwrctx;
+ return ctx;
err_unpin:
- i915_gem_object_unpin(pwrctx);
+ i915_gem_object_unpin(ctx);
err_unref:
- drm_gem_object_unreference(pwrctx);
+ drm_gem_object_unreference(ctx);
mutex_unlock(&dev->struct_mutex);
return NULL;
}
@@ -5796,6 +5796,29 @@ void intel_init_clock_gating(struct drm_device *dev)
* GPU can automatically power down the render unit if given a page
* to save state.
*/
+ if (IS_IRONLAKE_M(dev)) {
+ if (dev_priv->renderctx == NULL)
+ dev_priv->renderctx = intel_alloc_context_page(dev);
+ if (dev_priv->renderctx) {
+ struct drm_i915_gem_object *obj_priv;
+ obj_priv = to_intel_bo(dev_priv->renderctx);
+ if (obj_priv) {
+ BEGIN_LP_RING(4);
+ OUT_RING(MI_SET_CONTEXT);
+ OUT_RING(obj_priv->gtt_offset |
+ MI_MM_SPACE_GTT |
+ MI_SAVE_EXT_STATE_EN |
+ MI_RESTORE_EXT_STATE_EN |
+ MI_RESTORE_INHIBIT);
+ OUT_RING(MI_NOOP);
+ OUT_RING(MI_FLUSH);
+ ADVANCE_LP_RING();
+ }
+ } else
+ DRM_DEBUG_KMS("Failed to allocate render context."
+ "Disable RC6\n");
+ }
+
if (I915_HAS_RC6(dev) && drm_core_check_feature(dev, DRIVER_MODESET)) {
struct drm_i915_gem_object *obj_priv = NULL;
@@ -5804,7 +5827,7 @@ void intel_init_clock_gating(struct drm_device *dev)
} else {
struct drm_gem_object *pwrctx;
- pwrctx = intel_alloc_power_context(dev);
+ pwrctx = intel_alloc_context_page(dev);
if (pwrctx) {
dev_priv->pwrctx = pwrctx;
obj_priv = to_intel_bo(pwrctx);
@@ -6062,6 +6085,16 @@ void intel_modeset_cleanup(struct drm_device *dev)
if (dev_priv->display.disable_fbc)
dev_priv->display.disable_fbc(dev);
+ if (dev_priv->renderctx) {
+ struct drm_i915_gem_object *obj_priv;
+
+ obj_priv = to_intel_bo(dev_priv->renderctx);
+ I915_WRITE(CCID, obj_priv->gtt_offset &~ CCID_EN);
+ I915_READ(CCID);
+ i915_gem_object_unpin(dev_priv->renderctx);
+ drm_gem_object_unreference(dev_priv->renderctx);
+ }
+
if (dev_priv->pwrctx) {
struct drm_i915_gem_object *obj_priv;