[Bug 61941] Random GPU lockups/resets on Mobility Radeon HD 3650 with radeon.dpm=1

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=61941

Alex Deucher <alexdeucher at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher at gmail.com

--- Comment #3 from Alex Deucher <alexdeucher at gmail.com> ---
Do you only get the lockups with dpm enabled?  If so, try disabling certain dpm
features and see if any of them help.  See if you can narrow down which if any
of them help.  E.g.,

diff --git a/drivers/gpu/drm/radeon/rv6xx_dpm.c
b/drivers/gpu/drm/radeon/rv6xx_dpm.c
index 5811d27..13c5267 100644
--- a/drivers/gpu/drm/radeon/rv6xx_dpm.c
+++ b/drivers/gpu/drm/radeon/rv6xx_dpm.c
@@ -1981,10 +1981,10 @@ int rv6xx_dpm_init(struct radeon_device *rdev)
        else
                pi->fb_div_scale = 0;

-       pi->voltage_control =
-               radeon_atom_is_voltage_gpio(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
0);
+       pi->voltage_control = false;
+//             radeon_atom_is_voltage_gpio(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
0);

-       pi->gfx_clock_gating = true;
+       pi->gfx_clock_gating = false;

        pi->sclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
                                                       ASIC_INTERNAL_ENGINE_SS,
0);
@@ -1993,13 +1993,14 @@ int rv6xx_dpm_init(struct radeon_device *rdev)

        /* Disable sclk ss, causes hangs on a lot of systems */
        pi->sclk_ss = false;
+       pi->mclk_ss = false;

        if (pi->sclk_ss || pi->mclk_ss)
                pi->dynamic_ss = true;
        else
                pi->dynamic_ss = false;

-       pi->dynamic_pcie_gen2 = true;
+       pi->dynamic_pcie_gen2 = false;

        if (pi->gfx_clock_gating &&
            (rdev->pm.int_thermal_type != THERMAL_TYPE_NONE))

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