[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
@ 2021-06-09  3:55 Tiezhu Yang
  2021-06-23  8:14 ` Tiezhu Yang
  0 siblings, 1 reply; 3+ messages in thread
From: Tiezhu Yang @ 2021-06-09  3:55 UTC (permalink / raw)
  To: Alex Deucher, christian.koenig, David Airlie, Daniel Vetter
  Cc: amd-gfx, dri-devel, linux-kernel, Xuefeng Li, Jianmin Lv

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


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