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From 90651efcf8165390f653b4e74552d2dc705a26b0 Mon Sep 17 00:00:00 2001
From: Joshua Aberback <joshua.aberback@amd.com>
Date: Thu, 12 Sep 2019 13:14:52 -0400
Subject: [PATCH 4058/4256] drm/amd/display: Restore
should_update_pstate_support after bad revert
[Why]
This function was mistakenly reverted as part of a legitimate revert. The
old version that was reverted to has bad logic, and is causing situations
where p-state change support is being toggled when it shouldn't be,
resulting in hangs.
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
.../gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
index 213046de1675..7dd46eb96d67 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
@@ -281,8 +281,14 @@ static inline bool should_set_clock(bool safe_to_lower, int calc_clk, int cur_cl
static inline bool should_update_pstate_support(bool safe_to_lower, bool calc_support, bool cur_support)
{
- // Whenever we are transitioning pstate support, we always want to notify prior to committing state
- return (calc_support != cur_support) ? !safe_to_lower : false;
+ if (cur_support != calc_support) {
+ if (calc_support == true && safe_to_lower)
+ return true;
+ else if (calc_support == false && !safe_to_lower)
+ return true;
+ }
+
+ return false;
}
int clk_mgr_helper_get_active_display_cnt(
--
2.17.1
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