Reviewed-by: Kenneth Feng <[email protected]>

-----Original Message-----
From: amd-gfx [mailto:[email protected]] On Behalf Of Evan 
Quan
Sent: Tuesday, February 19, 2019 12:28 PM
To: [email protected]
Cc: Kuehling, Felix <[email protected]>; Quan, Evan <[email protected]>
Subject: [PATCH] drm/amd/powerplay: fix the confusing ppfeature mask 
calculations

Simplify the ppfeature mask calculations.

Change-Id: I41dee48c2ac8ed1fd7736bc8bb1f832da22cba13
Signed-off-by: Evan Quan <[email protected]>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c | 4 ++--  
drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c | 4 ++--  
drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c 
b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
index 5479125ff4f6..6d8e9609e900 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
@@ -4407,9 +4407,9 @@ static int vega10_set_ppfeature_status(struct pp_hwmgr 
*hwmgr, uint64_t new_ppfe
                return ret;
 
        features_to_disable =
-               (features_enabled ^ new_ppfeature_masks) & features_enabled;
+               features_enabled & ~new_ppfeature_masks;
        features_to_enable =
-               (features_enabled ^ new_ppfeature_masks) ^ features_to_disable;
+               ~features_enabled & new_ppfeature_masks;
 
        pr_debug("features_to_disable 0x%llx\n", features_to_disable);
        pr_debug("features_to_enable 0x%llx\n", features_to_enable); diff --git 
a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c 
b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c
index 6c8e78611c03..bdb48e94eff6 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c
@@ -2009,9 +2009,9 @@ static int vega12_set_ppfeature_status(struct pp_hwmgr 
*hwmgr, uint64_t new_ppfe
                return ret;
 
        features_to_disable =
-               (features_enabled ^ new_ppfeature_masks) & features_enabled;
+               features_enabled & ~new_ppfeature_masks;
        features_to_enable =
-               (features_enabled ^ new_ppfeature_masks) ^ features_to_disable;
+               ~features_enabled & new_ppfeature_masks;
 
        pr_debug("features_to_disable 0x%llx\n", features_to_disable);
        pr_debug("features_to_enable 0x%llx\n", features_to_enable); diff --git 
a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c 
b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index aad79affb081..2cf45a69faf7 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -3088,9 +3088,9 @@ static int vega20_set_ppfeature_status(struct pp_hwmgr 
*hwmgr, uint64_t new_ppfe
                return ret;
 
        features_to_disable =
-               (features_enabled ^ new_ppfeature_masks) & features_enabled;
+               features_enabled & ~new_ppfeature_masks;
        features_to_enable =
-               (features_enabled ^ new_ppfeature_masks) ^ features_to_disable;
+               ~features_enabled & new_ppfeature_masks;
 
        pr_debug("features_to_disable 0x%llx\n", features_to_disable);
        pr_debug("features_to_enable 0x%llx\n", features_to_enable);
--
2.20.1

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