From: Thierry Reding treding@nvidia.com
Use the drm_atomic_helper_suspend() and drm_atomic_helper_resume() helpers to implement subsystem-level suspend/resume.
v2: suspend framebuffer device to avoid concurrency issues v3: resume fbdev on failure to suspend (Emil Velikov)
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/tegra/drm.c | 12 ++++++++++++ drivers/gpu/drm/tegra/drm.h | 4 ++++ drivers/gpu/drm/tegra/fb.c | 24 ++++++++++++++++++++++++ 3 files changed, 40 insertions(+)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index c8a5dce4e46e..639a1041e178 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -1021,8 +1021,17 @@ static int host1x_drm_remove(struct host1x_device *dev) static int host1x_drm_suspend(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); + struct tegra_drm *tegra = drm->dev_private;
drm_kms_helper_poll_disable(drm); + tegra_drm_fb_suspend(drm); + + tegra->state = drm_atomic_helper_suspend(drm); + if (IS_ERR(tegra->state)) { + tegra_drm_fb_resume(drm); + drm_kms_helper_poll_enable(drm); + return PTR_ERR(tegra->state); + }
return 0; } @@ -1030,7 +1039,10 @@ static int host1x_drm_suspend(struct device *dev) static int host1x_drm_resume(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); + struct tegra_drm *tegra = drm->dev_private;
+ drm_atomic_helper_resume(drm, tegra->state); + tegra_drm_fb_resume(drm); drm_kms_helper_poll_enable(drm);
return 0; diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h index 69566b616f88..dd9bb4816d0b 100644 --- a/drivers/gpu/drm/tegra/drm.h +++ b/drivers/gpu/drm/tegra/drm.h @@ -57,6 +57,8 @@ struct tegra_drm { struct work_struct work; struct mutex lock; } commit; + + struct drm_atomic_state *state; };
struct tegra_drm_client; @@ -265,6 +267,8 @@ int tegra_drm_fb_prepare(struct drm_device *drm); void tegra_drm_fb_free(struct drm_device *drm); int tegra_drm_fb_init(struct drm_device *drm); void tegra_drm_fb_exit(struct drm_device *drm); +void tegra_drm_fb_suspend(struct drm_device *drm); +void tegra_drm_fb_resume(struct drm_device *drm); #ifdef CONFIG_DRM_FBDEV_EMULATION void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev); void tegra_fb_output_poll_changed(struct drm_device *drm); diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c index ede9e94f3312..a7213f30fb20 100644 --- a/drivers/gpu/drm/tegra/fb.c +++ b/drivers/gpu/drm/tegra/fb.c @@ -10,6 +10,8 @@ * published by the Free Software Foundation. */
+#include <linux/console.h> + #include "drm.h" #include "gem.h"
@@ -413,3 +415,25 @@ void tegra_drm_fb_exit(struct drm_device *drm) tegra_fbdev_exit(tegra->fbdev); #endif } + +void tegra_drm_fb_suspend(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_FBDEV_EMULATION + struct tegra_drm *tegra = drm->dev_private; + + console_lock(); + drm_fb_helper_set_suspend(&tegra->fbdev->base, 1); + console_unlock(); +#endif +} + +void tegra_drm_fb_resume(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_FBDEV_EMULATION + struct tegra_drm *tegra = drm->dev_private; + + console_lock(); + drm_fb_helper_set_suspend(&tegra->fbdev->base, 0); + console_unlock(); +#endif +}