(+ Benjamin) Dear Yannick, Many thanks for your patch. Acked-by: Philippe Cornu <[email protected]>
Dear Benjamin, May I ask you please to merge this patch + "drm/stm: dw_mipi_dsi-stm: add sleep power management" on drm-misc, if you agree of course and when you think it is the right time (next week?) Big thanks, Philippe :-) On 3/21/19 9:15 AM, Yannick Fertré wrote: > Implements system sleep power management ops. > > Signed-off-by: Yannick Fertré <[email protected]> > --- > drivers/gpu/drm/stm/drv.c | 35 +++++++++++++++++++++++++++++++++++ > drivers/gpu/drm/stm/ltdc.c | 24 ++++++++++++++++++++++++ > drivers/gpu/drm/stm/ltdc.h | 3 +++ > 3 files changed, 62 insertions(+) > > diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c > index 0a7f933..5834ef5 100644 > --- a/drivers/gpu/drm/stm/drv.c > +++ b/drivers/gpu/drm/stm/drv.c > @@ -129,6 +129,40 @@ static void drv_unload(struct drm_device *ddev) > drm_mode_config_cleanup(ddev); > } > > +static __maybe_unused int drv_suspend(struct device *dev) > +{ > + struct drm_device *ddev = dev_get_drvdata(dev); > + struct ltdc_device *ldev = ddev->dev_private; > + struct drm_atomic_state *state; > + > + drm_kms_helper_poll_disable(ddev); > + state = drm_atomic_helper_suspend(ddev); > + if (IS_ERR(state)) { > + drm_kms_helper_poll_enable(ddev); > + return PTR_ERR(state); > + } > + ldev->suspend_state = state; > + ltdc_suspend(ddev); > + > + return 0; > +} > + > +static __maybe_unused int drv_resume(struct device *dev) > +{ > + struct drm_device *ddev = dev_get_drvdata(dev); > + struct ltdc_device *ldev = ddev->dev_private; > + > + ltdc_resume(ddev); > + drm_atomic_helper_resume(ddev, ldev->suspend_state); > + drm_kms_helper_poll_enable(ddev); > + > + return 0; > +} > + > +static const struct dev_pm_ops drv_pm_ops = { > + SET_SYSTEM_SLEEP_PM_OPS(drv_suspend, drv_resume) > +}; > + > static int stm_drm_platform_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > @@ -186,6 +220,7 @@ static struct platform_driver stm_drm_platform_driver = { > .driver = { > .name = "stm32-display", > .of_match_table = drv_dt_ids, > + .pm = &drv_pm_ops, > }, > }; > > diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c > index b1741a9..32fd6a3 100644 > --- a/drivers/gpu/drm/stm/ltdc.c > +++ b/drivers/gpu/drm/stm/ltdc.c > @@ -1062,6 +1062,30 @@ static int ltdc_get_caps(struct drm_device *ddev) > return 0; > } > > +void ltdc_suspend(struct drm_device *ddev) > +{ > + struct ltdc_device *ldev = ddev->dev_private; > + > + DRM_DEBUG_DRIVER("\n"); > + clk_disable_unprepare(ldev->pixel_clk); > +} > + > +int ltdc_resume(struct drm_device *ddev) > +{ > + struct ltdc_device *ldev = ddev->dev_private; > + int ret; > + > + DRM_DEBUG_DRIVER("\n"); > + > + ret = clk_prepare_enable(ldev->pixel_clk); > + if (ret) { > + DRM_ERROR("failed to enable pixel clock (%d)\n", ret); > + return ret; > + } > + > + return 0; > +} > + > int ltdc_load(struct drm_device *ddev) > { > struct platform_device *pdev = to_platform_device(ddev->dev); > diff --git a/drivers/gpu/drm/stm/ltdc.h b/drivers/gpu/drm/stm/ltdc.h > index e46f477..a1ad0ae 100644 > --- a/drivers/gpu/drm/stm/ltdc.h > +++ b/drivers/gpu/drm/stm/ltdc.h > @@ -36,6 +36,7 @@ struct ltdc_device { > u32 error_status; > u32 irq_status; > struct fps_info plane_fpsi[LTDC_MAX_LAYER]; > + struct drm_atomic_state *suspend_state; > }; > > bool ltdc_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe, > @@ -45,5 +46,7 @@ bool ltdc_crtc_scanoutpos(struct drm_device *dev, unsigned > int pipe, > > int ltdc_load(struct drm_device *ddev); > void ltdc_unload(struct drm_device *ddev); > +void ltdc_suspend(struct drm_device *ddev); > +int ltdc_resume(struct drm_device *ddev); > > #endif > _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
