linux/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c, branch v4.19

drm/amdgpu: Remove duplicated power source update

2018-08-27T19:55:00Z

when ac/dc switch, driver will be notified by acpi event. then the power source will be updated. so don't need to get power source when set power state. Reviewed-by: Alex Deucher Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher

drm/amdgpu/pm: Fix potential Spectre v1

2018-07-31T21:58:23Z

idx can be indirectly controlled by user-space, hence leading to a potential exploitation of the Spectre variant 1 vulnerability. This issue was detected with the help of Smatch: drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c:408 amdgpu_set_pp_force_state() warn: potential spectre issue 'data.states' Fix this by sanitizing idx before using it to index data.states Notice that given that speculation windows are large, the policy is to kill the speculation on the first load and not worry if it can be completed with a dependent load/store [1]. [1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2 Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva Signed-off-by: Alex Deucher

drm/amdgpu: fix a reversed condition

2018-07-31T21:58:12Z

This test was reversed so it would end up leading to vddnb value can't be read via hwmon on APU. Reviewed-by: Evan Quan Reviewed-by: Alex Deucher Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org

drm/amdgpu/pm: Remove VLA usage

2018-07-18T21:18:45Z

In the quest to remove all stack VLA usage from the kernel[1], this uses the maximum sane buffer size and removes copy/paste code. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Reviewed-by: Rex Zhu Signed-off-by: Kees Cook Signed-off-by: Alex Deucher

drm/amdgpu/pm: fix display count in non-DC path

2018-07-05T21:39:50Z

new_active_crtcs is a bitmask, new_active_crtc_count is the actual count. Reviewed-by: Rex Zhu Signed-off-by: Alex Deucher

drm/amd/pp: Unify powergate_uvd/vce/mmhub to set_powergating_by_smu

2018-07-05T21:38:48Z

Some HW ip blocks need call SMU to enter/leave power gate state. So export common set_powergating_by_smu interface. 1. keep consistent with set_clockgating_by_smu 2. scales easily to powergate other ip(gfx) if necessary Reviewed-by: Evan Quan Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher

drm/amd/amdgpu: Add a GPU_LOAD entry to sysfs (v3)

2018-07-05T21:38:26Z

This adds what should be a stable interface to read GPU load from userspace. (v2): Fix comments and name of file per recommendations. (v3): Add chapter to amdgpu.rst as well. Signed-off-by: Tom St Denis Acked-by: Slava Abramov Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Use real power source in powerplay instand of hardcode

2018-06-15T17:20:45Z

1. move ac_power to struct pm from dpm, so can be shared with powerplay 2. remove power_source in powerplay, use adev->pm.ac_power instand. 3. update ac_power before dispatch power task. Reviewed-by: Alex Deucher Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher

drm/doc: Add amdgpu hwmon/power documentation (v2)

2018-06-15T17:20:45Z

Document the hwmon and power control interfaces exposed by the amdgpu driver. v2: use section rather than chapter for now Reviewed-by: Michel Dänzer Signed-off-by: Alex Deucher

drm/amdgpu: Fix display corruption on CI with dpm enabled

2018-05-15T18:44:19Z

with dpm enabled, need to get active crtcs in dc/no-dc mode. caused by 'commit ebb649667a31 ("drm/amdgpu: Set pm_display_cfg in non-dc mode")' Reviewed-by: Huang Rui Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher