The pipeline needs to ensure that the hardware is idle for suspend and
resume operations.
Implement suspend and resume functions using the DRM atomic helper
functions.
CC: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/rcar-du/rcar_du_drv.c | 18 +++++++++++++++---
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 1 +
2 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 09fbceade6b1..01b91d0c169c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -22,6 +22,7 @@
#include <linux/wait.h>
#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
@@ -267,9 +268,19 @@ static struct drm_driver rcar_du_driver = {
static int rcar_du_pm_suspend(struct device *dev)
{
struct rcar_du_device *rcdu = dev_get_drvdata(dev);
+ struct drm_atomic_state *state;
drm_kms_helper_poll_disable(rcdu->ddev);
- /* TODO Suspend the CRTC */
+ drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
+
+ state = drm_atomic_helper_suspend(rcdu->ddev);
+ if (IS_ERR(state)) {
+ drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
+ drm_kms_helper_poll_enable(rcdu->ddev);
+ return PTR_ERR(state);
+ }
+
+ rcdu->suspend_state = state;
return 0;
}
@@ -278,9 +289,10 @@ static int rcar_du_pm_resume(struct device *dev)
{
struct rcar_du_device *rcdu = dev_get_drvdata(dev);
- /* TODO Resume the CRTC */
-
+ drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
+ drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
drm_kms_helper_poll_enable(rcdu->ddev);
+
return 0;
}
#endif
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index f8cd79488ece..f400fde65a0c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -81,6 +81,7 @@ struct rcar_du_device {
struct drm_device *ddev;
struct drm_fbdev_cma *fbdev;
+ struct drm_atomic_state *suspend_state;
struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
unsigned int num_crtcs;
--
git-series 0.9.1
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