| Message ID | 20230901163944.RFT.5.I771eb4bd03d8772b19e7dcfaef3e2c167bce5846@changeid (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On Fri, 1 Sep 2023 16:39:56 -0700, Douglas Anderson wrote: > Based on grepping through the source code these drivers appear to be > missing a call to drm_atomic_helper_shutdown() at system shutdown time > and at driver remove (or unbind) time. Among other things, this means > that if a panel is in use that it won't be cleanly powered off at > system shutdown time. > > [ ... ] Acked-by: Maxime Ripard <mripard@kernel.org> Thanks! Maxime
On 02/09/2023 02:39, Douglas Anderson wrote: > Based on grepping through the source code these drivers appear to be > missing a call to drm_atomic_helper_shutdown() at system shutdown time > and at driver remove (or unbind) time. Among other things, this means > that if a panel is in use that it won't be cleanly powered off at > system shutdown time. > > The fact that we should call drm_atomic_helper_shutdown() in the case > of OS shutdown/restart and at driver remove (or unbind) time comes > straight out of the kernel doc "driver instance overview" in > drm_drv.c. Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> and tested on Beagle Bone Black (tilcdc): Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # tilcdc Tomi > > A few notes about these fixes: > - I confirmed that these drivers were all DRIVER_MODESET type drivers, > which I believe makes this relevant. > - I confirmed that these drivers were all DRIVER_ATOMIC. > - When adding drm_atomic_helper_shutdown() to the remove/unbind path, > I added it after drm_kms_helper_poll_fini() when the driver had > it. This seemed to be what other drivers did. If > drm_kms_helper_poll_fini() wasn't there I added it straight after > drm_dev_unregister(). > - This patch deals with drivers using the component model in similar > ways as the patch ("drm: Call drm_atomic_helper_shutdown() at > shutdown time for misc drivers") > - These fixes rely on the patch ("drm/atomic-helper: > drm_atomic_helper_shutdown(NULL) should be a noop") to simplify > shutdown. > > Suggested-by: Maxime Ripard <mripard@kernel.org> > Signed-off-by: Douglas Anderson <dianders@chromium.org> > --- > > drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 7 +++++++ > drivers/gpu/drm/mgag200/mgag200_drv.c | 8 ++++++++ > drivers/gpu/drm/pl111/pl111_drv.c | 7 +++++++ > drivers/gpu/drm/stm/drv.c | 7 +++++++ > drivers/gpu/drm/tilcdc/tilcdc_drv.c | 11 ++++++++++- > drivers/gpu/drm/tve200/tve200_drv.c | 7 +++++++ > drivers/gpu/drm/vboxvideo/vbox_drv.c | 10 ++++++++++ > 7 files changed, 56 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c > index d207b03f8357..78122b35a0cb 100644 > --- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c > +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c > @@ -358,11 +358,18 @@ static void aspeed_gfx_remove(struct platform_device *pdev) > sysfs_remove_group(&pdev->dev.kobj, &aspeed_sysfs_attr_group); > drm_dev_unregister(drm); > aspeed_gfx_unload(drm); > + drm_atomic_helper_shutdown(drm); > +} > + > +static void aspeed_gfx_shutdown(struct platform_device *pdev) > +{ > + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); > } > > static struct platform_driver aspeed_gfx_platform_driver = { > .probe = aspeed_gfx_probe, > .remove_new = aspeed_gfx_remove, > + .shutdown = aspeed_gfx_shutdown, > .driver = { > .name = "aspeed_gfx", > .of_match_table = aspeed_gfx_match, > diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c > index abddf37f0ea1..2fb18b782b05 100644 > --- a/drivers/gpu/drm/mgag200/mgag200_drv.c > +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c > @@ -10,6 +10,7 @@ > #include <linux/pci.h> > > #include <drm/drm_aperture.h> > +#include <drm/drm_atomic_helper.h> > #include <drm/drm_drv.h> > #include <drm/drm_fbdev_generic.h> > #include <drm/drm_file.h> > @@ -278,6 +279,12 @@ static void mgag200_pci_remove(struct pci_dev *pdev) > struct drm_device *dev = pci_get_drvdata(pdev); > > drm_dev_unregister(dev); > + drm_atomic_helper_shutdown(dev); > +} > + > +static void mgag200_pci_shutdown(struct pci_dev *pdev) > +{ > + drm_atomic_helper_shutdown(pci_get_drvdata(pdev)); > } > > static struct pci_driver mgag200_pci_driver = { > @@ -285,6 +292,7 @@ static struct pci_driver mgag200_pci_driver = { > .id_table = mgag200_pciidlist, > .probe = mgag200_pci_probe, > .remove = mgag200_pci_remove, > + .shutdown = mgag200_pci_shutdown, > }; > > drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset); > diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c > index ba3b5b5f0cdf..02e6b74d5016 100644 > --- a/drivers/gpu/drm/pl111/pl111_drv.c > +++ b/drivers/gpu/drm/pl111/pl111_drv.c > @@ -323,12 +323,18 @@ static void pl111_amba_remove(struct amba_device *amba_dev) > struct pl111_drm_dev_private *priv = drm->dev_private; > > drm_dev_unregister(drm); > + drm_atomic_helper_shutdown(drm); > if (priv->panel) > drm_panel_bridge_remove(priv->bridge); > drm_dev_put(drm); > of_reserved_mem_device_release(dev); > } > > +static void pl111_amba_shutdown(struct amba_device *amba_dev) > +{ > + drm_atomic_helper_shutdown(amba_get_drvdata(amba_dev)); > +} > + > /* > * This early variant lacks the 565 and 444 pixel formats. > */ > @@ -431,6 +437,7 @@ static struct amba_driver pl111_amba_driver __maybe_unused = { > }, > .probe = pl111_amba_probe, > .remove = pl111_amba_remove, > + .shutdown = pl111_amba_shutdown, > .id_table = pl111_id_table, > }; > > diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c > index c68c831136c9..e8523abef27a 100644 > --- a/drivers/gpu/drm/stm/drv.c > +++ b/drivers/gpu/drm/stm/drv.c > @@ -114,6 +114,7 @@ static void drv_unload(struct drm_device *ddev) > DRM_DEBUG("%s\n", __func__); > > drm_kms_helper_poll_fini(ddev); > + drm_atomic_helper_shutdown(ddev); > ltdc_unload(ddev); > } > > @@ -225,6 +226,11 @@ static void stm_drm_platform_remove(struct platform_device *pdev) > drm_dev_put(ddev); > } > > +static void stm_drm_platform_shutdown(struct platform_device *pdev) > +{ > + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); > +} > + > static const struct of_device_id drv_dt_ids[] = { > { .compatible = "st,stm32-ltdc"}, > { /* end node */ }, > @@ -234,6 +240,7 @@ MODULE_DEVICE_TABLE(of, drv_dt_ids); > static struct platform_driver stm_drm_platform_driver = { > .probe = stm_drm_platform_probe, > .remove_new = stm_drm_platform_remove, > + .shutdown = stm_drm_platform_shutdown, > .driver = { > .name = "stm32-display", > .of_match_table = drv_dt_ids, > diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c > index fe56beea3e93..8ebd7134ee21 100644 > --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c > +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c > @@ -175,6 +175,7 @@ static void tilcdc_fini(struct drm_device *dev) > drm_dev_unregister(dev); > > drm_kms_helper_poll_fini(dev); > + drm_atomic_helper_shutdown(dev); > tilcdc_irq_uninstall(dev); > drm_mode_config_cleanup(dev); > > @@ -389,6 +390,7 @@ static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev) > > init_failed: > tilcdc_fini(ddev); > + platform_set_drvdata(pdev, NULL); > > return ret; > } > @@ -537,7 +539,8 @@ static void tilcdc_unbind(struct device *dev) > if (!ddev->dev_private) > return; > > - tilcdc_fini(dev_get_drvdata(dev)); > + tilcdc_fini(ddev); > + dev_set_drvdata(dev, NULL); > } > > static const struct component_master_ops tilcdc_comp_ops = { > @@ -582,6 +585,11 @@ static int tilcdc_pdev_remove(struct platform_device *pdev) > return 0; > } > > +static void tilcdc_pdev_shutdown(struct platform_device *pdev) > +{ > + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); > +} > + > static const struct of_device_id tilcdc_of_match[] = { > { .compatible = "ti,am33xx-tilcdc", }, > { .compatible = "ti,da850-tilcdc", }, > @@ -592,6 +600,7 @@ MODULE_DEVICE_TABLE(of, tilcdc_of_match); > static struct platform_driver tilcdc_platform_driver = { > .probe = tilcdc_pdev_probe, > .remove = tilcdc_pdev_remove, > + .shutdown = tilcdc_pdev_shutdown, > .driver = { > .name = "tilcdc", > .pm = pm_sleep_ptr(&tilcdc_pm_ops), > diff --git a/drivers/gpu/drm/tve200/tve200_drv.c b/drivers/gpu/drm/tve200/tve200_drv.c > index 0bb56d063536..acce210e2554 100644 > --- a/drivers/gpu/drm/tve200/tve200_drv.c > +++ b/drivers/gpu/drm/tve200/tve200_drv.c > @@ -242,6 +242,7 @@ static void tve200_remove(struct platform_device *pdev) > struct tve200_drm_dev_private *priv = drm->dev_private; > > drm_dev_unregister(drm); > + drm_atomic_helper_shutdown(drm); > if (priv->panel) > drm_panel_bridge_remove(priv->bridge); > drm_mode_config_cleanup(drm); > @@ -249,6 +250,11 @@ static void tve200_remove(struct platform_device *pdev) > drm_dev_put(drm); > } > > +static void tve200_shutdown(struct platform_device *pdev) > +{ > + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); > +} > + > static const struct of_device_id tve200_of_match[] = { > { > .compatible = "faraday,tve200", > @@ -263,6 +269,7 @@ static struct platform_driver tve200_driver = { > }, > .probe = tve200_probe, > .remove_new = tve200_remove, > + .shutdown = tve200_shutdown, > }; > drm_module_platform_driver(tve200_driver); > > diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c > index 4fee15c97c34..047b95812334 100644 > --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c > +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c > @@ -12,6 +12,7 @@ > #include <linux/vt_kern.h> > > #include <drm/drm_aperture.h> > +#include <drm/drm_atomic_helper.h> > #include <drm/drm_drv.h> > #include <drm/drm_fbdev_generic.h> > #include <drm/drm_file.h> > @@ -97,11 +98,19 @@ static void vbox_pci_remove(struct pci_dev *pdev) > struct vbox_private *vbox = pci_get_drvdata(pdev); > > drm_dev_unregister(&vbox->ddev); > + drm_atomic_helper_shutdown(&vbox->ddev); > vbox_irq_fini(vbox); > vbox_mode_fini(vbox); > vbox_hw_fini(vbox); > } > > +static void vbox_pci_shutdown(struct pci_dev *pdev) > +{ > + struct vbox_private *vbox = pci_get_drvdata(pdev); > + > + drm_atomic_helper_shutdown(&vbox->ddev); > +} > + > static int vbox_pm_suspend(struct device *dev) > { > struct vbox_private *vbox = dev_get_drvdata(dev); > @@ -165,6 +174,7 @@ static struct pci_driver vbox_pci_driver = { > .id_table = pciidlist, > .probe = vbox_pci_probe, > .remove = vbox_pci_remove, > + .shutdown = vbox_pci_shutdown, > .driver.pm = pm_sleep_ptr(&vbox_pm_ops), > }; >
Hi, On Fri, Sep 1, 2023 at 4:41 PM Douglas Anderson <dianders@chromium.org> wrote: > > Based on grepping through the source code these drivers appear to be > missing a call to drm_atomic_helper_shutdown() at system shutdown time > and at driver remove (or unbind) time. Among other things, this means > that if a panel is in use that it won't be cleanly powered off at > system shutdown time. > > The fact that we should call drm_atomic_helper_shutdown() in the case > of OS shutdown/restart and at driver remove (or unbind) time comes > straight out of the kernel doc "driver instance overview" in > drm_drv.c. > > A few notes about these fixes: > - I confirmed that these drivers were all DRIVER_MODESET type drivers, > which I believe makes this relevant. > - I confirmed that these drivers were all DRIVER_ATOMIC. > - When adding drm_atomic_helper_shutdown() to the remove/unbind path, > I added it after drm_kms_helper_poll_fini() when the driver had > it. This seemed to be what other drivers did. If > drm_kms_helper_poll_fini() wasn't there I added it straight after > drm_dev_unregister(). > - This patch deals with drivers using the component model in similar > ways as the patch ("drm: Call drm_atomic_helper_shutdown() at > shutdown time for misc drivers") > - These fixes rely on the patch ("drm/atomic-helper: > drm_atomic_helper_shutdown(NULL) should be a noop") to simplify > shutdown. > > Suggested-by: Maxime Ripard <mripard@kernel.org> > Signed-off-by: Douglas Anderson <dianders@chromium.org> > --- > > drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 7 +++++++ > drivers/gpu/drm/mgag200/mgag200_drv.c | 8 ++++++++ > drivers/gpu/drm/pl111/pl111_drv.c | 7 +++++++ > drivers/gpu/drm/stm/drv.c | 7 +++++++ > drivers/gpu/drm/tilcdc/tilcdc_drv.c | 11 ++++++++++- > drivers/gpu/drm/tve200/tve200_drv.c | 7 +++++++ > drivers/gpu/drm/vboxvideo/vbox_drv.c | 10 ++++++++++ > 7 files changed, 56 insertions(+), 1 deletion(-) Landed on drm-misc-next: 3c4babae3c4a drm: Call drm_atomic_helper_shutdown() at shutdown/remove time for misc drivers
diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c index d207b03f8357..78122b35a0cb 100644 --- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c @@ -358,11 +358,18 @@ static void aspeed_gfx_remove(struct platform_device *pdev) sysfs_remove_group(&pdev->dev.kobj, &aspeed_sysfs_attr_group); drm_dev_unregister(drm); aspeed_gfx_unload(drm); + drm_atomic_helper_shutdown(drm); +} + +static void aspeed_gfx_shutdown(struct platform_device *pdev) +{ + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); } static struct platform_driver aspeed_gfx_platform_driver = { .probe = aspeed_gfx_probe, .remove_new = aspeed_gfx_remove, + .shutdown = aspeed_gfx_shutdown, .driver = { .name = "aspeed_gfx", .of_match_table = aspeed_gfx_match, diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index abddf37f0ea1..2fb18b782b05 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -10,6 +10,7 @@ #include <linux/pci.h> #include <drm/drm_aperture.h> +#include <drm/drm_atomic_helper.h> #include <drm/drm_drv.h> #include <drm/drm_fbdev_generic.h> #include <drm/drm_file.h> @@ -278,6 +279,12 @@ static void mgag200_pci_remove(struct pci_dev *pdev) struct drm_device *dev = pci_get_drvdata(pdev); drm_dev_unregister(dev); + drm_atomic_helper_shutdown(dev); +} + +static void mgag200_pci_shutdown(struct pci_dev *pdev) +{ + drm_atomic_helper_shutdown(pci_get_drvdata(pdev)); } static struct pci_driver mgag200_pci_driver = { @@ -285,6 +292,7 @@ static struct pci_driver mgag200_pci_driver = { .id_table = mgag200_pciidlist, .probe = mgag200_pci_probe, .remove = mgag200_pci_remove, + .shutdown = mgag200_pci_shutdown, }; drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset); diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c index ba3b5b5f0cdf..02e6b74d5016 100644 --- a/drivers/gpu/drm/pl111/pl111_drv.c +++ b/drivers/gpu/drm/pl111/pl111_drv.c @@ -323,12 +323,18 @@ static void pl111_amba_remove(struct amba_device *amba_dev) struct pl111_drm_dev_private *priv = drm->dev_private; drm_dev_unregister(drm); + drm_atomic_helper_shutdown(drm); if (priv->panel) drm_panel_bridge_remove(priv->bridge); drm_dev_put(drm); of_reserved_mem_device_release(dev); } +static void pl111_amba_shutdown(struct amba_device *amba_dev) +{ + drm_atomic_helper_shutdown(amba_get_drvdata(amba_dev)); +} + /* * This early variant lacks the 565 and 444 pixel formats. */ @@ -431,6 +437,7 @@ static struct amba_driver pl111_amba_driver __maybe_unused = { }, .probe = pl111_amba_probe, .remove = pl111_amba_remove, + .shutdown = pl111_amba_shutdown, .id_table = pl111_id_table, }; diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c index c68c831136c9..e8523abef27a 100644 --- a/drivers/gpu/drm/stm/drv.c +++ b/drivers/gpu/drm/stm/drv.c @@ -114,6 +114,7 @@ static void drv_unload(struct drm_device *ddev) DRM_DEBUG("%s\n", __func__); drm_kms_helper_poll_fini(ddev); + drm_atomic_helper_shutdown(ddev); ltdc_unload(ddev); } @@ -225,6 +226,11 @@ static void stm_drm_platform_remove(struct platform_device *pdev) drm_dev_put(ddev); } +static void stm_drm_platform_shutdown(struct platform_device *pdev) +{ + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); +} + static const struct of_device_id drv_dt_ids[] = { { .compatible = "st,stm32-ltdc"}, { /* end node */ }, @@ -234,6 +240,7 @@ MODULE_DEVICE_TABLE(of, drv_dt_ids); static struct platform_driver stm_drm_platform_driver = { .probe = stm_drm_platform_probe, .remove_new = stm_drm_platform_remove, + .shutdown = stm_drm_platform_shutdown, .driver = { .name = "stm32-display", .of_match_table = drv_dt_ids, diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index fe56beea3e93..8ebd7134ee21 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -175,6 +175,7 @@ static void tilcdc_fini(struct drm_device *dev) drm_dev_unregister(dev); drm_kms_helper_poll_fini(dev); + drm_atomic_helper_shutdown(dev); tilcdc_irq_uninstall(dev); drm_mode_config_cleanup(dev); @@ -389,6 +390,7 @@ static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev) init_failed: tilcdc_fini(ddev); + platform_set_drvdata(pdev, NULL); return ret; } @@ -537,7 +539,8 @@ static void tilcdc_unbind(struct device *dev) if (!ddev->dev_private) return; - tilcdc_fini(dev_get_drvdata(dev)); + tilcdc_fini(ddev); + dev_set_drvdata(dev, NULL); } static const struct component_master_ops tilcdc_comp_ops = { @@ -582,6 +585,11 @@ static int tilcdc_pdev_remove(struct platform_device *pdev) return 0; } +static void tilcdc_pdev_shutdown(struct platform_device *pdev) +{ + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); +} + static const struct of_device_id tilcdc_of_match[] = { { .compatible = "ti,am33xx-tilcdc", }, { .compatible = "ti,da850-tilcdc", }, @@ -592,6 +600,7 @@ MODULE_DEVICE_TABLE(of, tilcdc_of_match); static struct platform_driver tilcdc_platform_driver = { .probe = tilcdc_pdev_probe, .remove = tilcdc_pdev_remove, + .shutdown = tilcdc_pdev_shutdown, .driver = { .name = "tilcdc", .pm = pm_sleep_ptr(&tilcdc_pm_ops), diff --git a/drivers/gpu/drm/tve200/tve200_drv.c b/drivers/gpu/drm/tve200/tve200_drv.c index 0bb56d063536..acce210e2554 100644 --- a/drivers/gpu/drm/tve200/tve200_drv.c +++ b/drivers/gpu/drm/tve200/tve200_drv.c @@ -242,6 +242,7 @@ static void tve200_remove(struct platform_device *pdev) struct tve200_drm_dev_private *priv = drm->dev_private; drm_dev_unregister(drm); + drm_atomic_helper_shutdown(drm); if (priv->panel) drm_panel_bridge_remove(priv->bridge); drm_mode_config_cleanup(drm); @@ -249,6 +250,11 @@ static void tve200_remove(struct platform_device *pdev) drm_dev_put(drm); } +static void tve200_shutdown(struct platform_device *pdev) +{ + drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); +} + static const struct of_device_id tve200_of_match[] = { { .compatible = "faraday,tve200", @@ -263,6 +269,7 @@ static struct platform_driver tve200_driver = { }, .probe = tve200_probe, .remove_new = tve200_remove, + .shutdown = tve200_shutdown, }; drm_module_platform_driver(tve200_driver); diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c index 4fee15c97c34..047b95812334 100644 --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c @@ -12,6 +12,7 @@ #include <linux/vt_kern.h> #include <drm/drm_aperture.h> +#include <drm/drm_atomic_helper.h> #include <drm/drm_drv.h> #include <drm/drm_fbdev_generic.h> #include <drm/drm_file.h> @@ -97,11 +98,19 @@ static void vbox_pci_remove(struct pci_dev *pdev) struct vbox_private *vbox = pci_get_drvdata(pdev); drm_dev_unregister(&vbox->ddev); + drm_atomic_helper_shutdown(&vbox->ddev); vbox_irq_fini(vbox); vbox_mode_fini(vbox); vbox_hw_fini(vbox); } +static void vbox_pci_shutdown(struct pci_dev *pdev) +{ + struct vbox_private *vbox = pci_get_drvdata(pdev); + + drm_atomic_helper_shutdown(&vbox->ddev); +} + static int vbox_pm_suspend(struct device *dev) { struct vbox_private *vbox = dev_get_drvdata(dev); @@ -165,6 +174,7 @@ static struct pci_driver vbox_pci_driver = { .id_table = pciidlist, .probe = vbox_pci_probe, .remove = vbox_pci_remove, + .shutdown = vbox_pci_shutdown, .driver.pm = pm_sleep_ptr(&vbox_pm_ops), };
Based on grepping through the source code these drivers appear to be missing a call to drm_atomic_helper_shutdown() at system shutdown time and at driver remove (or unbind) time. Among other things, this means that if a panel is in use that it won't be cleanly powered off at system shutdown time. The fact that we should call drm_atomic_helper_shutdown() in the case of OS shutdown/restart and at driver remove (or unbind) time comes straight out of the kernel doc "driver instance overview" in drm_drv.c. A few notes about these fixes: - I confirmed that these drivers were all DRIVER_MODESET type drivers, which I believe makes this relevant. - I confirmed that these drivers were all DRIVER_ATOMIC. - When adding drm_atomic_helper_shutdown() to the remove/unbind path, I added it after drm_kms_helper_poll_fini() when the driver had it. This seemed to be what other drivers did. If drm_kms_helper_poll_fini() wasn't there I added it straight after drm_dev_unregister(). - This patch deals with drivers using the component model in similar ways as the patch ("drm: Call drm_atomic_helper_shutdown() at shutdown time for misc drivers") - These fixes rely on the patch ("drm/atomic-helper: drm_atomic_helper_shutdown(NULL) should be a noop") to simplify shutdown. Suggested-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> --- drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 7 +++++++ drivers/gpu/drm/mgag200/mgag200_drv.c | 8 ++++++++ drivers/gpu/drm/pl111/pl111_drv.c | 7 +++++++ drivers/gpu/drm/stm/drv.c | 7 +++++++ drivers/gpu/drm/tilcdc/tilcdc_drv.c | 11 ++++++++++- drivers/gpu/drm/tve200/tve200_drv.c | 7 +++++++ drivers/gpu/drm/vboxvideo/vbox_drv.c | 10 ++++++++++ 7 files changed, 56 insertions(+), 1 deletion(-)