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drm/amd/pp: Add a helper to convert VID to voltage value

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Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2018-01-03 17:24:36 +08:00 committed by Alex Deucher
parent 64b9342f31
commit 9bd2bae13d
2 changed files with 6 additions and 0 deletions
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5
drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
View file

@ -60,6 +60,11 @@ uint8_t convert_to_vid(uint16_t vddc)
return (uint8_t) ((6200 - (vddc * VOLTAGE_SCALE)) / 25);
}
uint16_t convert_to_vddc(uint8_t vid)
{
return (uint16_t) ((6200 - (vid * 25)) / VOLTAGE_SCALE);
}
static int phm_get_pci_bus_devfn(struct pp_hwmgr *hwmgr,
struct cgs_system_info *sys_info)
{

1
drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
View file

@ -42,6 +42,7 @@ struct pp_atomctrl_voltage_table;
#define VOLTAGE_SCALE 4
uint8_t convert_to_vid(uint16_t vddc);
uint16_t convert_to_vddc(uint8_t vid);
enum DISPLAY_GAP {
DISPLAY_GAP_VBLANK_OR_WM = 0, /* Wait for vblank or MCHG watermark. */