[PATCH 1/1] drm/radeon: Fix GPU lockups for the R7 M270

[Umang Raghuvanshi]

Commit 3a69adfe5617 ("drm/radeon: drop oland quirks") removed
quirks for Oland but also caused a regression where M270 GPUs
would go into a lock-up when OpenGL intensive applications were used.
This reverts the change only for the M270 and fixes the lock-ups.

Signed-off-by: Umang Raghuvanshi <u at umangis.me>
---
 drivers/gpu/drm/radeon/si_dpm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index 2944916f7102..fc2f998bdbf0 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3017,6 +3017,11 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
 		    (rdev->pdev->device == 0x6667)) {
 			max_sclk = 75000;
 		}
+	} else if (rdev->family == CHIP_OLAND && rdev->pdev->device == 0x6604 &&
+		   rdev->pdev->revision == 0) {
+		// Fix max_sclk and max_mclk for the Radeon R7 M270
+		max_sclk = 75000;
+		max_mclk = 80000;
 	}
 	/* Apply dpm quirks */
 	while (p && p->chip_device != 0) {
-- 
2.12.0

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