On Sat, Jan 30, 2021 at 6:27 AM Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> wrote: > > We are seeing root ports on some desktop boards support D3cold for > discrete graphics card. So when efifb is in use while graphics device > isn't bound to a driver, PCI and ACPI will put the graphics to D3cold > when runtime suspend kicks in, makes efifb stop working. > > So ensure the graphics device won't be runtime suspended, to keep efifb > work all the time. > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> > --- > drivers/video/fbdev/efifb.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c > index e57c00824965..19edd7206409 100644 > --- a/drivers/video/fbdev/efifb.c > +++ b/drivers/video/fbdev/efifb.c > @@ -16,6 +16,7 @@ > #include <linux/platform_device.h> > #include <linux/printk.h> > #include <linux/screen_info.h> > +#include <linux/pm_runtime.h> > #include <video/vga.h> > #include <asm/efi.h> > #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */ > @@ -575,6 +576,7 @@ static int efifb_probe(struct platform_device *dev) > goto err_fb_dealoc; > } > fb_info(info, "%s frame buffer device\n", info->fix.id); > + pm_runtime_get_sync(&efifb_pci_dev->dev); > return 0; > > err_fb_dealoc: > @@ -601,6 +603,7 @@ static int efifb_remove(struct platform_device *pdev) > unregister_framebuffer(info); > sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); > framebuffer_release(info); > + pm_runtime_put(&efifb_pci_dev->dev); > > return 0; > } > -- > 2.29.2 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
