[PATCH v3] drm/radeon: Call radeon_suspend_kms() in radeon_pci_shutdown() for Loongson64

[PATCH v3] drm/radeon: Call radeon_suspend_kms() in radeon_pci_shutdown() for Loongson64

[Tiezhu Yang]

On the Loongson64 platform used with Radeon GPU, shutdown or reboot failed
when console=tty is in the boot cmdline.

radeon_suspend_kms() puts the hw in the suspend state, especially set fb
state as FBINFO_STATE_SUSPENDED:

	if (fbcon) {
		console_lock();
		radeon_fbdev_set_suspend(rdev, 1);
		console_unlock();
	}

Then avoid to do any more fb operations in the related functions:

	if (p->state != FBINFO_STATE_RUNNING)
		return;

So call radeon_suspend_kms() in radeon_pci_shutdown() for Loongson64 to fix
this issue, it looks like some kind of workaround like powerpc.

Co-developed-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---

v3: Fix typo "becauase" in the original comment

 drivers/gpu/drm/radeon/radeon_drv.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index efeb115..40aece3 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -386,13 +386,13 @@ radeon_pci_shutdown(struct pci_dev *pdev)
 	if (radeon_device_is_virtual())
 		radeon_pci_remove(pdev);
 
-#ifdef CONFIG_PPC64
+#if defined(CONFIG_PPC64) || defined(CONFIG_MACH_LOONGSON64)
 	/*
 	 * Some adapters need to be suspended before a
 	 * shutdown occurs in order to prevent an error
-	 * during kexec.
-	 * Make this power specific becauase it breaks
-	 * some non-power boards.
+	 * during kexec, shutdown or reboot.
+	 * Make this power and Loongson specific because
+	 * it breaks some other boards.
 	 */
 	radeon_suspend_kms(pci_get_drvdata(pdev), true, true, false);
 #endif
-- 
2.1.0

Re: [PATCH v3] drm/radeon: Call radeon_suspend_kms() in radeon_pci_shutdown() for Loongson64

[Tiezhu Yang]

Hi Alex and Christian,

Any comments?
Can this patch be accepted or anything else I need to improve?

https://lore.kernel.org/patchwork/patch/1443649/

Thanks,
Tiezhu

Re: [PATCH v3] drm/radeon: Call radeon_suspend_kms() in radeon_pci_shutdown() for Loongson64

[Christian König]

Looks good to me.

Somebody could try to investigate further why that is necessary on the 
platform, but radeon is only in maintenance mode without new feature 
developed.

Regards,
Christian.

Am 23.06.21 um 10:14 schrieb Tiezhu Yang:
> Hi Alex and Christian,
>
> Any comments?
> Can this patch be accepted or anything else I need to improve?
>
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fpatchwork%2Fpatch%2F1443649%2F&data=04%7C01%7Cchristian.koenig%40amd.com%7C2162309822114d2e41b108d9361ef26c%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637600328822651335%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=2uxyAGk6sHO3lqw0FX6HITY%2Fbj%2BzEMfSIcqbzmiguMs%3D&reserved=0 
>
>
> Thanks,
> Tiezhu
>