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From 9586425a8cdb6421088235b6d032288f627c53b1 Mon Sep 17 00:00:00 2001
From: Rex Zhu <Rex.Zhu@amd.com>
Date: Wed, 3 Jan 2018 17:24:36 +0800
Subject: [PATCH 3081/4131] drm/amd/pp: Add a helper to convert VID to voltage
value
Change-Id: I051eaf4c758b77d7a6fe167d4cb03ad079c3c75e
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
---
drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 5 +++++
drivers/gpu/drm/amd/powerplay/inc/hwmgr.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 654cb11..e35bdc5 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -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)
{
diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
index 384a4cb..f37f211 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
@@ -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. */
--
2.7.4
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