[PATCH v3.6 02.5/22] drm/i915: add intel_display_suspend, v2.

Maarten Lankhorst
2015-05-26T08:31:28Z

This is a function used to disable all crtc's. This makes it clearer
to distinguish between when mode needs to be preserved and when
it can be trashed.

Changes since v1:
- Copy power changes from intel_crtc_control.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 4 +---
drivers/gpu/drm/i915/intel_display.c | 38 ++++++++++++++++++++++++++----------
drivers/gpu/drm/i915/intel_drv.h | 1 +
3 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 5cc57f2ec192..d1a090a9f653 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -600,7 +600,6 @@ static int skl_resume_prepare(struct drm_i915_private *dev_priv);
static int i915_drm_suspend(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc;
pci_power_t opregion_target_state;
int error;

@@ -631,8 +630,7 @@ static int i915_drm_suspend(struct drm_device *dev)
* for _thaw. Also, power gate the CRTC power wells.
*/
drm_modeset_lock_all(dev);
- for_each_crtc(dev, crtc)
- intel_crtc_control(crtc, false);
+ intel_display_suspend(dev);
drm_modeset_unlock_all(dev);

intel_dp_mst_suspend(dev);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index cae36ec1c2ef..68e008c15f43 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3204,9 +3204,6 @@ void intel_crtc_reset(struct intel_crtc *crtc)

void intel_prepare_reset(struct drm_device *dev)
{
- struct drm_i915_private *dev_priv = to_i915(dev);
- struct intel_crtc *crtc;
-
/* no reset support for gen2 */
if (IS_GEN2(dev))
return;
@@ -3221,13 +3218,7 @@ void intel_prepare_reset(struct drm_device *dev)
* Disabling the crtcs gracefully seems nicer. Also the
* g33 docs say we should at least disable all the planes.
*/
- for_each_intel_crtc(dev, crtc) {
- if (!crtc->active)
- continue;
-
- intel_crtc_disable_planes(&crtc->base);
- dev_priv->display.crtc_disable(&crtc->base);
- }
+ intel_display_suspend(dev);
}

void intel_finish_reset(struct drm_device *dev)
@@ -6018,6 +6009,33 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
mutex_unlock(&dev->struct_mutex);
}

+/*
+ * turn all crtc's off, but do not adjust state
+ * This has to be paired with a call to intel_modeset_setup_hw_state.
+ */
+void intel_display_suspend(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_crtc *crtc;
+
+ for_each_crtc(dev, crtc) {
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ enum intel_display_power_domain domain;
+ unsigned long domains;
+
+ if (!intel_crtc->active)
+ continue;
+
+ intel_crtc_disable_planes(crtc);
+ dev_priv->display.crtc_disable(crtc);
+
+ domains = intel_crtc->enabled_power_domains;
+ for_each_power_domain(domain, domains)
+ intel_display_power_put(dev_priv, domain);
+ intel_crtc->enabled_power_domains = 0;
+ }
+}
+
/* Master function to enable/disable CRTC and corresponding power wells */
void intel_crtc_control(struct drm_crtc *crtc, bool enable)
{
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 70d0cc8fe70e..c24d670529e3 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -992,6 +992,7 @@ int intel_pch_rawclk(struct drm_device *dev);
void intel_mark_busy(struct drm_device *dev);
void intel_mark_idle(struct drm_device *dev);
void intel_crtc_restore_mode(struct drm_crtc *crtc);
+void intel_display_suspend(struct drm_device *dev);
void intel_crtc_control(struct drm_crtc *crtc, bool enable);
void intel_crtc_reset(struct intel_crtc *crtc);
void intel_crtc_update_dpms(struct drm_crtc *crtc);