1 files changed, 45 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3081-drm-amd-pp-Add-a-helper-to-convert-VID-to-voltage-va.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3081-drm-amd-pp-Add-a-helper-to-convert-VID-to-voltage-va.patch
new file mode 100644
index 00000000..b267680e
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3081-drm-amd-pp-Add-a-helper-to-convert-VID-to-voltage-va.patch
@@ -0,0 +1,45 @@
+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
+