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SubjectRe: [PATCH] efifb: Ensure graphics device for efifb stays at PCI D0
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Hi

Am 22.02.21 um 08:08 schrieb Kai-Heng Feng:
> On Mon, Feb 1, 2021 at 11:21 PM Alex Deucher <alexdeucher@gmail.com> wrote:
>>
>> On Sat, Jan 30, 2021 at 6:27 AM Kai-Heng Feng
>> <kai.heng.feng@canonical.com> 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@canonical.com>
>>
>> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
>
> A gentle ping...

Thanks for your patch. I've added it to drm-misc-next.

Best regards
Thomas

>
>>
>>> ---
>>> 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@lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/dri-devel

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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