diff options
author | Noralf Trønnes <noralf@tronnes.org> | 2017-11-06 22:18:08 +0300 |
---|---|---|
committer | Noralf Trønnes <noralf@tronnes.org> | 2017-11-30 20:18:08 +0300 |
commit | ca038cfb5cfa8d48b427b916efe97e711f5a18c7 (patch) | |
tree | a87d729c077cdfc1c8b426266ea43091616726f4 /drivers | |
parent | b66d0f348624101203dbec22e45c74e1c895b881 (diff) | |
download | linux-ca038cfb5cfa8d48b427b916efe97e711f5a18c7.tar.xz |
drm/modeset-helper: Add simple modeset suspend/resume helpers
Add drm_mode_config_helper_suspend/resume() which takes care of
atomic modeset suspend/resume for simple use cases.
The suspend state is stored in struct drm_mode_config.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20171106191812.38927-3-noralf@tronnes.org
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/drm_modeset_helper.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modeset_helper.c b/drivers/gpu/drm/drm_modeset_helper.c index 9cb1eede0b4d..f1c24ab0ef09 100644 --- a/drivers/gpu/drm/drm_modeset_helper.c +++ b/drivers/gpu/drm/drm_modeset_helper.c @@ -20,6 +20,9 @@ * OF THIS SOFTWARE. */ +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_helper.h> #include <drm/drm_modeset_helper.h> #include <drm/drm_plane_helper.h> @@ -156,3 +159,76 @@ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc, NULL); } EXPORT_SYMBOL(drm_crtc_init); + +/** + * drm_mode_config_helper_suspend - Modeset suspend helper + * @dev: DRM device + * + * This helper function takes care of suspending the modeset side. It disables + * output polling if initialized, suspends fbdev if used and finally calls + * drm_atomic_helper_suspend(). + * If suspending fails, fbdev and polling is re-enabled. + * + * Returns: + * Zero on success, negative error code on error. + * + * See also: + * drm_kms_helper_poll_disable() and drm_fb_helper_set_suspend_unlocked(). + */ +int drm_mode_config_helper_suspend(struct drm_device *dev) +{ + struct drm_atomic_state *state; + + if (!dev) + return 0; + + drm_kms_helper_poll_disable(dev); + drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 1); + state = drm_atomic_helper_suspend(dev); + if (IS_ERR(state)) { + drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 0); + drm_kms_helper_poll_enable(dev); + return PTR_ERR(state); + } + + dev->mode_config.suspend_state = state; + + return 0; +} +EXPORT_SYMBOL(drm_mode_config_helper_suspend); + +/** + * drm_mode_config_helper_resume - Modeset resume helper + * @dev: DRM device + * + * This helper function takes care of resuming the modeset side. It calls + * drm_atomic_helper_resume(), resumes fbdev if used and enables output polling + * if initiaized. + * + * Returns: + * Zero on success, negative error code on error. + * + * See also: + * drm_fb_helper_set_suspend_unlocked() and drm_kms_helper_poll_enable(). + */ +int drm_mode_config_helper_resume(struct drm_device *dev) +{ + int ret; + + if (!dev) + return 0; + + if (WARN_ON(!dev->mode_config.suspend_state)) + return -EINVAL; + + ret = drm_atomic_helper_resume(dev, dev->mode_config.suspend_state); + if (ret) + DRM_ERROR("Failed to resume (%d)\n", ret); + dev->mode_config.suspend_state = NULL; + + drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 0); + drm_kms_helper_poll_enable(dev); + + return ret; +} +EXPORT_SYMBOL(drm_mode_config_helper_resume); |