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path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
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2020-07-08drm/amdgpu: Move the mutex lock/unlock outAlex Jivin
Move the mutext lock/unlock outside of the if(), as the mutex is always taken: either in the if() branch or in the else branch. Signed-off-by: Alex Jivin <alex.jivin@amd.com> Suggested-By: Luben Tukov <luben.tuikov@amd.com> Reviewed-by: Luben Tuikov <luben.tuikov@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-02drm/amdgpu: use %u rather than %d for sclk/mclkAlex Deucher
Large clock values may overflow and show up as negative. Reported by prOMiNd on IRC. Acked-by: Nirmoy Das <nirmoy.das@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-02drm/amdgpu: SI support for UVD and VCE power managmentAlex Jivin
Port functionality from the Radeon driver to support UVD and VCE power management. Signed-off-by: Alex Jivin <alex.jivin@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-01drm/amdgpu: remove perf level dpm in one-VFWenhui Sheng
On Navi12 platform, node power_dpm_force_performance_level doesn't work correctly in one-VF mode with at least three smu messages not supported: SMU_MSG_SetSoftMaxByFreq SMU_MSG_SetSoftMinByFreq SMU_MSG_TransferTableDram2Smu Reviewed-by: Kevin Wang <kevin1.wang@amd.com> Signed-off-by: Wenhui Sheng <Wenhui.Sheng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-01drm/amdgpu: remove redundant initialization of variable retColin Ian King
The variable ret is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-01drm/amdgpu/pm: fix ref count leak when pm_runtime_get_sync failsAlex Deucher
The call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning. Reviewed-by: Evan Quan <evan.quan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-01drm/amdgpu: fix documentation around busy_percentageAlex Deucher
Add rename the gpu busy percentage for consistency and add the mem busy percentage documentation. Reviewed-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Nirmoy Das <nirmoy.das@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-01drm/amdgpu/pm: update comment to clarify Overdrive interfacesAlex Deucher
Vega10 and previous asics use one interface, vega20 and newer use another. Reviewed-by: Evan Quan <evan.quan@amd.com> Acked-by: Nirmoy Das <nirmoy.das@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-07-01drm/amd/powerplay: drop unused code around power limitEvan Quan
Drop unused APIs, variables and argument. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-06-02drm/amdgpu: Add unique_id and serial_number for Arcturus v3Kent Russell
Add support for unique_id and serial_number, as these are now the same value, and will be for future ASICs as well. v2: Explicitly create unique_id only for VG10/20/ARC v3: Change set_unique_id to get_unique_id for clarity Signed-off-by: Kent Russell <kent.russell@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-29drm/amdgpu: added a sysfs interface for thermal throttling related V4Evan Quan
User can check and set the enablement of throttling logging and the interval between each logging. V2: simplify the sysfs interface(no string parsing) V3: add proper lock protection on updating throttling_logging_rs.interval V4: documentation cosmetic per Luben's suggestion Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Luben Tuikov <luben.tuikov@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-29drm/amdgpu/pm: return an error during GPU reset or suspend (v2)Alex Deucher
Return an error for sysfs and debugfs power interfaces during gpu reset and suspend. Prevents access to the hw while it may be in an unusable state. v2: squash in fix to drop suspend check Acked-by: Nirmoy Das <nirmoy.das@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-26drm/amdgpu: fix device attribute node create failed with multi gpuKevin Wang
the origin design will use varible of "attr->states" to save node supported states on current gpu device, but for multi gpu device, when probe second gpu device, the driver will check attribute node states from previous gpu device wthether to create attribute node. it will cause other gpu device create attribute node faild. 1. add member attr_list into amdgpu_device to link supported device attribute node. 2. add new structure "struct amdgpu_device_attr_entry{}" to track device attribute state. 3. drop member "states" from amdgpu_device_attr. v2: 1. move "attr_list" into amdgpu_pm and rename to "pm_attr_list". 2. refine create & remove device node functions parameter. fix: drm/amdgpu: optimize amdgpu device attribute code Signed-off-by: Kevin Wang <kevin1.wang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-22drm/amdgpu: add apu flags (v2)Alex Deucher
Add some APU flags to simplify handling of different APU variants. It's easier to understand the special cases if we use names flags rather than checking device ids and silicon revisions. v2: rebase on latest code Acked-by: Evan Quan <evan.quan@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-22drm/amd/powerpay: Disable gfxoff when setting manual mode on picasso and ravenchen gong
[Problem description] 1. Boot up picasso platform, launches desktop, Don't do anything (APU enter into "gfxoff" state) 2. Remote login to platform using SSH, then type the command line: sudo su -c "echo manual > /sys/class/drm/card0/device/power_dpm_force_performance_level" sudo su -c "echo 2 > /sys/class/drm/card0/device/pp_dpm_sclk" (fix SCLK to 1400MHz) 3. Move the mouse around in Window 4. Phenomenon : The screen frozen Tester will switch sclk level during glmark2 run time. APU will enter "gfxoff" state intermittently during glmark2 run time. The system got hanged if fix GFXCLK to 1400MHz when APU is in "gfxoff" state. [Debug] 1. Fix SCLK to X MHz 1400: screen frozen, screen black, then OS will reboot. 1300: screen frozen. 1200: screen frozen, screen black. 1100: screen frozen, screen black, then OS will reboot. 1000: screen frozen, screen black. 900: screen frozen, screen black, then OS will reboot. 800: Situation Nomal, issue disappear. 700: Situation Nomal, issue disappear. 2. SBIOS setting: AMD CBS --> SMU Debug Options -->SMU Debug --> "GFX DLDO Psm Margin Control": 50 : Situation Nomal, issue disappear. 45 : Situation Nomal, issue disappear. 40 : Situation Nomal, issue disappear. 35 : Situation Nomal, issue disappear. 30 : screen black. 25 : screen frozen, then blurred screen. 20 : screen frozen. 15 : screen black. 10 : screen frozen. 5 : screen frozen, then blurred screen. 3. Disable GFXOFF feature Situation Nomal, issue disappear. [Why] Through a period of time debugging with Sys Eng team and SMU team, Sys Eng team said this is voltage/frequency marginal issue not a F/W or H/W bug. This experiment proves that default targetPsm [for f=1400MHz] is not sufficient when GFXOFF is enabled on Picasso. SMU team think it is an odd test conditions to force sclk="1400MHz" when GPU is in "gfxoff" state，then wake up the GFX. SCLK should be in the "lowest frequency" when gfxoff. [How] Disable gfxoff when setting manual mode. Enable gfxoff when setting other mode(exiting manual mode) again. By the way, from the user point of view, now that user switch to manual mode and force SCLK Frequency, he don't want SCLK be controlled by workload.It becomes meaningless to "switch to manual mode" if APU enter "gfxoff" due to lack of workload at this point. Tips: Same issue observed on Raven. Signed-off-by: chen gong <curry.gong@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-22drm/amdgpu: fix pm sysfs node handling (v2)Alex Deucher
Fix typos that prevented them from showing up. v2: switch other files in addition to pp_clk_voltage Fixes: 4e01847c38f7a5 ("drm/amdgpu: optimize amdgpu device attribute code") Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1150 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Evan Quan <evan.quan@amd.com>
2020-05-21drm/amdgpu: improve error handling in pcie_bwAlex Deucher
1. Initialize the counters to 0 in case the callback fails to initialize them. 2. The counters don't exist on APUs so return an error for them. 3. Return an error if the callback doesn't exist. Reviewed-by: Yong Zhao <Yong.Zhao@amd.com> Reviewed-By: Kent Russell <kent.russell@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-21drm/amdgpu: off by one in amdgpu_device_attr_create_groups() error handlingDan Carpenter
This loop in the error handling code should start a "i - 1" and end at "i == 0". Currently it starts a "i" and ends at "i == 1". The result is that it removes one attribute that wasn't created yet, and leaks the zeroeth attribute. Fixes: 4e01847c38f7 ("drm/amdgpu: optimize amdgpu device attribute code") Acked-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Kevin Wang <kevin1.wang@amd.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-21drm/amdgpu: cleanup unnecessary virt sriov check in amdgpu attributeKevin Wang
the amdgpu device attribute node will be created accordding to sriov vf mode at runtime. cleanup unnecessary sriov check in attribute operation function. Signed-off-by: Kevin Wang <kevin1.wang@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-05-18drm/amdgpu: optimize amdgpu device attribute codeKevin Wang
unified amdgpu device attribute node functions: 1. add some helper functions to create amdgpu device attribute node. 2. create device node according to device attr flags on different VF mode. 3. rename some functions name to adapt a new interface. v2: 1. remove ATTR_STATE_DEAD, ATTR_STATE_ALIVE enum. 2. rename callback function perform to attr_update. 3. modify some variable names Signed-off-by: Kevin Wang <kevin1.wang@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-04-24drm/amdgpu: skip sysfs node not belong to one vf modeMonk Liu
Signed-off-by: Monk Liu <Monk.Liu@amd.com> Acked-by: Yintian Tao <yttao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-04-23drm/amdgpu: Init data to avoid oops while reading pp_num_states.limingyu
For chip like CHIP_OLAND with si enabled(amdgpu.si_support=1), the amdgpu will expose pp_num_states to the /sys directory. In this moment, read the pp_num_states file will excute the amdgpu_get_pp_num_states func. In our case, the data hasn't been initialized, so the kernel will access some ilegal address, trigger the segmentfault and system will reboot soon: uos@uos-PC:~$ cat /sys/devices/pci0000\:00/0000\:00\:00.0/0000\:01\:00 .0/pp_num_states Message from syslogd@uos-PC at Apr 22 09:26:20 ... kernel:[ 82.154129] Internal error: Oops: 96000004 [#1] SMP This patch aims to fix this problem, avoid that reading file triggers the kernel sementfault. Signed-off-by: limingyu <limingyu@uniontech.com> Signed-off-by: zhoubinbin <zhoubinbin@uniontech.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-04-09drm/amdgpu: Fix oops when pp_funcs is unset in ACPI eventAaron Ma
On ARCTURUS and RENOIR, powerplay is not supported yet. When plug in or unplug power jack, ACPI event will issue. Then kernel NULL pointer BUG will be triggered. Check for NULL pointers before calling. Signed-off-by: Aaron Ma <aaron.ma@canonical.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-03-25drm/amdgpu/swSMU: handle manual AC/DC notificationsAlex Deucher
For boards that do not support automatic AC/DC transitions in firmware, manually tell the firmware when the status changes. Bug: https://gitlab.freedesktop.org/drm/amd/issues/1043 Reviewed-by: Evan Quan <evan.quan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-02-26drm/amdgpu/pm: move debugfs init into core amdgpu debugfsAlex Deucher
In order to remove the load and unload drm callbacks, we need to reorder the init sequence to move all the drm debugfs file handling. Do this for pm. Tested-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-01-16drm/amdgpu/pm: clean up return typesAlex Deucher
count is size_t so don't use negative values. Reviewed-by: Evan Quan <evan.quan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-01-14drm/amdgpu/pm: properly handle runtime pmAlex Deucher
If power management sysfs or debugfs files are accessed, power up the GPU when necessary. Reviewed-by: Evan Quan <evan.quan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-01-07drm/amd/powerplay: cleanup the interfaces for powergate setting through SMUEvan Quan
Provided an unified entry point. And fixed the confusing that the API usage is conflict with what the naming implies. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-12-11drm/amd/powerplay: enable pp one vf mode for vega10Yintian Tao
Originally, due to the restriction from PSP and SMU, VF has to send message to hypervisor driver to handle powerplay change which is complicated and redundant. Currently, SMU and PSP can support VF to directly handle powerplay change by itself. Therefore, the old code about the handshake between VF and PF to handle powerplay will be removed and VF will use new the registers below to handshake with SMU. mmMP1_SMN_C2PMSG_101: register to handle SMU message mmMP1_SMN_C2PMSG_102: register to handle SMU parameter mmMP1_SMN_C2PMSG_103: register to handle SMU response v2: remove module parameter pp_one_vf v3: fix the parens v4: forbid vf to change smu feature v5: use hwmon_attributes_visible to skip sepicified hwmon atrribute v6: change skip condition at vega10_copy_table_to_smc Signed-off-by: Yintian Tao <yttao@amd.com> Acked-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Kenneth Feng <kenneth.feng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-11-19drm/amdgpu: enable JPEG2.0 dpmLeo Liu
By using its own enabling function Signed-off-by: Leo Liu <leo.liu@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-10-25drm/amd/powerplay: skip unsupported clock limit settings on Arcturus V2Evan Quan
For Arcturus, clock limit settings on uclk/socclk/fclk domains are not supported. V2: simplify the code to support both SGPU and MGPU cases Signed-off-by: Evan Quan <evan.quan@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-10-25drm/amd/powerplay: add lock protection for swSMU APIs V2Evan Quan
This is a quick and low risk fix. Those APIs which are exposed to other IPs or to support sysfs/hwmon interfaces or DAL will have lock protection. Meanwhile no lock protection is enforced for swSMU internal used APIs. Future optimization is needed. V2: strip the lock protection for all swSMU internal APIs Signed-off-by: Evan Quan <evan.quan@amd.com> Acked-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> Acked-by: Feifei Xu <Feifei.Xu@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-10-03drm/amdgpu: fix documentation for amdgpu_pm.cAlex Deucher
Fix DOC link name, clean up formatting in pp_dpm_* section. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-10-03docs: drm/amdgpu: Resolve build warningsAdam Zerella
Some of the documentation formatting could be improved which will resolve some Sphinx amdgpu build warnings e.g WARNING: Unexpected indentation. WARNING: Block quote ends without a blank line; unexpected unindent. WARNING: Inline emphasis start-string without end-string. Signed-off-by: Adam Zerella <adam.zerella@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-08-29drm/amd/amdgpu: hide voltage and power sensors on SI and KV partsJean Delvare
The driver does not support these sensors yet and there is no point in creating sysfs attributes which will always return an error. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-08-21drm/amd/powerplay: expose supported clock domains only through sysfsEvan Quan
Do not expose those unsupported clock domains through sysfs on Arcturus. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Kevin Wang <kevin1.wang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-30drm/amd/powerplay: correct UVD/VCE/VCN power status retrievalEvan Quan
VCN should be used for Vega20 later ASICs while UVD and VCE are for previous ASICs. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Kenneth Feng <kenneth.feng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-30drm/amd/powerplay: implment sysfs feature status function in smuKevin Wang
1. Unified feature enable status format in sysfs 2. Rename ppfeature to pp_features to adapt other pp sysfs node name 3. this function support all asic, not asic related function. Signed-off-by: Kevin Wang <kevin1.wang@amd.com> Reviewed-by: Kenneth Feng <kenneth.feng@amd.com> Acked-by: Rui Huang <ray.huang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-30drm/amd/powerplay: fix null pointer dereference around dpm state relatesEvan Quan
DPM state relates are not supported on the new SW SMU ASICs. But still it's not OK to trigger null pointer dereference on accessing them. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-30drm/amd/powerplay: minor fixes around SW SMU power and fan settingEvan Quan
Add checking for possible invalid input and null pointer. And drop redundant code. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-30drm/amd/powerplay: some cosmetic fixesEvan Quan
Drop redundant check, duplicate check, duplicate setting and fix the return value. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-22drm/amdgpu/smu: move fan rpm query into the asic specific codeAlex Deucher
On vega20, there is an SMU message to query it. On navi, it's fetched from the metrics table. Reviewed-by: Evan Quan <evan.quan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-18drm/amdgpu/pm: remove check for pp funcs in freq sysfs handlersAlex Deucher
The dpm sensor function already does this for us. This fixes the freq*_input files with the new SMU implementation. Reviewed-by: Evan Quan <evan.quan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-07-17drm/amd/powerplay: fix deadlock around smu_handle_task V2Evan Quan
As the lock was already held on the entrance to smu_handle_task. - V2: lock in small granularity Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Kevin Wang <kevin1.wang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-27drm/amd/powerplay: no memory activity support on Vega10Evan Quan
Make mem_busy_percent sysfs interface invisible on Vega10. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-25drm/amd/amdgpu: amdgpu_hwmon_show_temp: initialize tempErnst Sjöstrand
Reported by smatch: drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c:1496 amdgpu_hwmon_show_temp() error: uninitialized symbol 'temp'. Signed-off-by: Ernst Sjöstrand <ernstp@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-25drm/amd/amdgpu: Fix amdgpu_set_pp_od_clk_voltage error checkErnst Sjöstrand
Reported by smatch: drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c:693 amdgpu_set_pp_od_clk_voltage() error: uninitialized symbol 'ret'. Signed-off-by: Ernst Sjöstrand <ernstp@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-25Merge branch 'drm-next' into drm-next-5.3Alex Deucher
Backmerge drm-next and fix up conflicts due to drmP.h removal. Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-21drm/amd/powerplay: fix deadlock issue for smu_force_performance_levelKevin Wang
the smu->mutex is internal lock resource in sw-smu, some functions will use it at the same time, so it maybe will cause deadlock issue. this patch fix this issue in smu_force_performance_level function. Signed-off-by: Kevin Wang <kevin1.wang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-21drm/amd/powerplay: add function force_clk_levels for navi10Kevin Wang
add sysfs interface of force_clk_levels sysfs for navi10. Signed-off-by: Kevin Wang <kevin1.wang@amd.com> Reviewed-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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