| Message ID | 1424627464-16869-2-git-send-email-sylvain.rochet@finsecur.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 02/22/2015 06:51 PM, Sylvain Rochet wrote: > On suspend: switch off CRTC if not already suspended with runtime PM > > On resume: switch on CRTC if we were not already suspended from runtime > PM while suspending. > > Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Regards Andrzej > --- > drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 47 ++++++++++++++++++++++++++++ > 1 file changed, 47 insertions(+) > > diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c > index 22c3cca..c4bb1f9 100644 > --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c > +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c > @@ -559,6 +559,52 @@ static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev) > return 0; > } > > +#ifdef CONFIG_PM > +static int atmel_hlcdc_dc_drm_suspend(struct device *dev) > +{ > + struct drm_device *drm_dev = dev_get_drvdata(dev); > + struct drm_crtc *crtc; > + > + if (pm_runtime_suspended(dev)) > + return 0; > + > + drm_modeset_lock_all(drm_dev); > + list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { > + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; > + if (crtc->enabled) { > + crtc_funcs->disable(crtc); > + /* save enable state for resume */ > + crtc->enabled = true; > + } > + } > + 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; > + > + if (pm_runtime_suspended(dev)) > + return 0; > + > + drm_modeset_lock_all(drm_dev); > + list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { > + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; > + if (crtc->enabled) { > + crtc->enabled = false; > + crtc_funcs->enable(crtc); > + } > + } > + drm_modeset_unlock_all(drm_dev); > + return 0; > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops, > + atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume); > + > static const struct of_device_id atmel_hlcdc_dc_of_match[] = { > { .compatible = "atmel,hlcdc-display-controller" }, > { }, > @@ -569,6 +615,7 @@ static struct platform_driver atmel_hlcdc_dc_platform_driver = { > .remove = atmel_hlcdc_dc_drm_remove, > .driver = { > .name = "atmel-hlcdc-display-controller", > + .pm = &atmel_hlcdc_dc_drm_pm_ops, > .of_match_table = atmel_hlcdc_dc_of_match, > }, > }; >
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 22c3cca..c4bb1f9 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -559,6 +559,52 @@ static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int atmel_hlcdc_dc_drm_suspend(struct device *dev) +{ + struct drm_device *drm_dev = dev_get_drvdata(dev); + struct drm_crtc *crtc; + + if (pm_runtime_suspended(dev)) + return 0; + + drm_modeset_lock_all(drm_dev); + list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; + if (crtc->enabled) { + crtc_funcs->disable(crtc); + /* save enable state for resume */ + crtc->enabled = true; + } + } + 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; + + if (pm_runtime_suspended(dev)) + return 0; + + drm_modeset_lock_all(drm_dev); + list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; + if (crtc->enabled) { + crtc->enabled = false; + crtc_funcs->enable(crtc); + } + } + drm_modeset_unlock_all(drm_dev); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops, + atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume); + static const struct of_device_id atmel_hlcdc_dc_of_match[] = { { .compatible = "atmel,hlcdc-display-controller" }, { }, @@ -569,6 +615,7 @@ static struct platform_driver atmel_hlcdc_dc_platform_driver = { .remove = atmel_hlcdc_dc_drm_remove, .driver = { .name = "atmel-hlcdc-display-controller", + .pm = &atmel_hlcdc_dc_drm_pm_ops, .of_match_table = atmel_hlcdc_dc_of_match, }, };
On suspend: switch off CRTC if not already suspended with runtime PM On resume: switch on CRTC if we were not already suspended from runtime PM while suspending. Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com> --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 47 ++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+)