The current suspend resume implementation is assuming register values are
kept when entering suspend, which is no longer the case with the
suspend-to-RAM on the sama5d2.
While at it, switch to the generic infrastructure to enter suspend mode
(drm_atomic_helper_suspend/resume()).
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 33 --------------------------
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 31 ++++++++++++------------
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 8 ++++---
3 files changed, 21 insertions(+), 51 deletions(-)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 6b50fb706c0e..53bfa56ca47a 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -55,14 +55,12 @@ drm_crtc_state_to_atmel_hlcdc_crtc_state(struct drm_crtc_state *state)
* @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device
* @event: pointer to the current page flip event
* @id: CRTC id (returned by drm_crtc_index)
- * @enabled: CRTC state
*/
struct atmel_hlcdc_crtc {
struct drm_crtc base;
struct atmel_hlcdc_dc *dc;
struct drm_pending_vblank_event *event;
int id;
- bool enabled;
};
static inline struct atmel_hlcdc_crtc *
@@ -158,9 +156,6 @@ static void atmel_hlcdc_crtc_disable(struct drm_crtc *c)
struct regmap *regmap = crtc->dc->hlcdc->regmap;
unsigned int status;
- if (!crtc->enabled)
- return;
-
drm_crtc_vblank_off(c);
pm_runtime_get_sync(dev->dev);
@@ -186,8 +181,6 @@ static void atmel_hlcdc_crtc_disable(struct drm_crtc *c)
pm_runtime_allow(dev->dev);
pm_runtime_put_sync(dev->dev);
-
- crtc->enabled = false;
}
static void atmel_hlcdc_crtc_enable(struct drm_crtc *c)
@@ -197,9 +190,6 @@ static void atmel_hlcdc_crtc_enable(struct drm_crtc *c)
struct regmap *regmap = crtc->dc->hlcdc->regmap;
unsigned int status;
- if (crtc->enabled)
- return;
-
pm_runtime_get_sync(dev->dev);
pm_runtime_forbid(dev->dev);
@@ -226,29 +216,6 @@ static void atmel_hlcdc_crtc_enable(struct drm_crtc *c)
pm_runtime_put_sync(dev->dev);
drm_crtc_vblank_on(c);
-
- crtc->enabled = true;
-}
-
-void atmel_hlcdc_crtc_suspend(struct drm_crtc *c)
-{
- struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
-
- if (crtc->enabled) {
- atmel_hlcdc_crtc_disable(c);
- /* save enable state for resume */
- crtc->enabled = true;
- }
-}
-
-void atmel_hlcdc_crtc_resume(struct drm_crtc *c)
-{
- struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
-
- if (crtc->enabled) {
- crtc->enabled = false;
- atmel_hlcdc_crtc_enable(c);
- }
}
#define ATMEL_HLCDC_RGB444_OUTPUT BIT(0)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index 970bd87d7cce..0fdb6ad0469f 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -810,31 +810,32 @@ static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
- struct drm_crtc *crtc;
+ struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
+ struct regmap *regmap = dc->hlcdc->regmap;
+ struct drm_atomic_state *state;
+
+ state = drm_atomic_helper_suspend(drm_dev);
+ if (IS_ERR(state))
+ return PTR_ERR(state);
- if (pm_runtime_suspended(dev))
- return 0;
+ dc->suspend.state = state;
+
+ regmap_read(regmap, ATMEL_HLCDC_IMR, &dc->suspend.imr);
+ regmap_write(regmap, ATMEL_HLCDC_IDR, dc->suspend.imr);
+ clk_disable_unprepare(dc->hlcdc->periph_clk);
- drm_modeset_lock_all(drm_dev);
- list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head)
- atmel_hlcdc_crtc_suspend(crtc);
- drm_modeset_unlock_all(drm_dev);
return 0;
}
static int atmel_hlcdc_dc_drm_resume(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
- struct drm_crtc *crtc;
+ struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
- if (pm_runtime_suspended(dev))
- return 0;
+ clk_prepare_enable(dc->hlcdc->periph_clk);
+ regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, dc->suspend.imr);
- drm_modeset_lock_all(drm_dev);
- list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head)
- atmel_hlcdc_crtc_resume(crtc);
- drm_modeset_unlock_all(drm_dev);
- return 0;
+ return drm_atomic_helper_resume(drm_dev, dc->suspend.state);
}
#endif
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
index da7f25a59be5..433641b6e23b 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
@@ -358,6 +358,7 @@ struct atmel_hlcdc_plane_properties {
* @planes: instantiated planes
* @layers: active HLCDC layers
* @wq: display controller workqueue
+ * @suspend: used to store the HLCDC state when entering suspend
* @commit: used for async commit handling
*/
struct atmel_hlcdc_dc {
@@ -369,6 +370,10 @@ struct atmel_hlcdc_dc {
struct atmel_hlcdc_layer *layers[ATMEL_HLCDC_MAX_LAYERS];
struct workqueue_struct *wq;
struct {
+ u32 imr;
+ struct drm_atomic_state *state;
+ } suspend;
+ struct {
wait_queue_head_t wait;
bool pending;
} commit;
@@ -428,9 +433,6 @@ int atmel_hlcdc_plane_prepare_ahb_routing(struct drm_crtc_state *c_state);
void atmel_hlcdc_crtc_irq(struct drm_crtc *c);
-void atmel_hlcdc_crtc_suspend(struct drm_crtc *crtc);
-void atmel_hlcdc_crtc_resume(struct drm_crtc *crtc);
-
int atmel_hlcdc_crtc_create(struct drm_device *dev);
int atmel_hlcdc_create_outputs(struct drm_device *dev);
--
2.7.4
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