[Bug 91880] Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91880

--- Comment #60 from Alex Deucher <alexdeucher at gmail.com> ---
Can you see if disabling different dpm options helps?  Try to narrow down which
one(s) are problematic.  E.g., this patch will disable all of them.


diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
index 4a09947..60ed634 100644
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -5707,10 +5707,10 @@ int ci_dpm_init(struct radeon_device *rdev)

        pi->mclk_activity_target = CISLAND_MCLK_TARGETACTIVITY_DFLT;

-       pi->sclk_dpm_key_disabled = 0;
-       pi->mclk_dpm_key_disabled = 0;
-       pi->pcie_dpm_key_disabled = 0;
-       pi->thermal_sclk_dpm_enabled = 0;
+       pi->sclk_dpm_key_disabled = 1;
+       pi->mclk_dpm_key_disabled = 1;
+       pi->pcie_dpm_key_disabled = 1;
+       pi->thermal_sclk_dpm_enabled = 1;

        /* mclk dpm is unstable on some R7 260X cards with the old mc ucode */
        if ((rdev->pdev->device == 0x6658) &&

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