mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
drm/amdgpu/pm: document pp_od_clk_voltage
sysfs interface for fine grained clock and voltage control. Acked-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
parent
6b2576f5bd
commit
4e418c3401
1 changed files with 23 additions and 0 deletions
|
@ -455,6 +455,29 @@ static ssize_t amdgpu_set_pp_table(struct device *dev,
|
|||
return count;
|
||||
}
|
||||
|
||||
/**
|
||||
* DOC: pp_od_clk_voltage
|
||||
*
|
||||
* The amdgpu driver provides a sysfs API for adjusting the clocks and voltages
|
||||
* in each power level within a power state. The pp_od_clk_voltage is used for
|
||||
* this.
|
||||
*
|
||||
* Reading the file will display:
|
||||
* - a list of engine clock levels and voltages labeled OD_SCLK
|
||||
* - a list of memory clock levels and voltages labeled OD_MCLK
|
||||
* - a list of valid ranges for sclk, mclk, and voltage labeled OD_RANGE
|
||||
*
|
||||
* To manually adjust these settings, first select manual using
|
||||
* power_dpm_force_performance_level. Enter a new value for each
|
||||
* level by writing a string that contains "s/m level clock voltage" to
|
||||
* the file. E.g., "s 1 500 820" will update sclk level 1 to be 500 MHz
|
||||
* at 820 mV; "m 0 350 810" will update mclk level 0 to be 350 MHz at
|
||||
* 810 mV. When you have edited all of the states as needed, write
|
||||
* "c" (commit) to the file to commit your changes. If you want to reset to the
|
||||
* default power levels, write "r" (reset) to the file to reset them.
|
||||
*
|
||||
*/
|
||||
|
||||
static ssize_t amdgpu_set_pp_od_clk_voltage(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
|
|
Loading…
Reference in a new issue