linux-kernel - [PATCH 3.16 105/410] drm/radeon: Add dpm quirk for Jet PRO (v2)

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Date:   Thu, 07 Jun 2018 15:05:21 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Christian König" <christian.koenig@....com>,
        "Alex Deucher" <alexander.deucher@....com>
Subject: [PATCH 3.16 105/410] drm/radeon: Add dpm quirk for Jet PRO (v2)

3.16.57-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@....com>

commit 239b5f64e12b1f09f506c164dff0374924782979 upstream.

Fixes stability issues.

v2: clamp sclk to 600 Mhz

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=103370
Acked-by: Christian König <christian.koenig@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/radeon/si_dpm.c | 5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -2974,6 +2974,11 @@ static void si_apply_state_adjust_rules(
 			max_sclk = 75000;
 			max_mclk = 80000;
 		}
+		if ((rdev->pdev->revision == 0xC3) ||
+		    (rdev->pdev->device == 0x6665)) {
+			max_sclk = 60000;
+			max_mclk = 80000;
+		}
 	}
 	/* Apply dpm quirks */
 	while (p && p->chip_device != 0) {