linux-kernel - [PATCH AUTOSEL 5.8 36/64] drm/amdgpu/display bail early in dm_pp_get_static

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Message-Id: <20200810190859.3793319-36-sashal@kernel.org>
Date:   Mon, 10 Aug 2020 15:08:31 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alex Deucher <alexander.deucher@....com>,
        Evan Quan <evan.quan@....com>, Sasha Levin <sashal@...nel.org>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.8 36/64] drm/amdgpu/display bail early in dm_pp_get_static_clocks

From: Alex Deucher <alexander.deucher@....com>

[ Upstream commit 376814f5fcf1aadda501d1413d56e8af85d19a97 ]

If there are no supported callbacks.  We'll fall back to the
nominal clocks.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1170
Reviewed-by: Evan Quan <evan.quan@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
index a2e1a73f66b81..7cee8070cb113 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
@@ -530,6 +530,8 @@ bool dm_pp_get_static_clocks(
 			&pp_clk_info);
 	else if (adev->smu.ppt_funcs)
 		ret = smu_get_current_clocks(&adev->smu, &pp_clk_info);
+	else
+		return false;
 	if (ret)
 		return false;
 
-- 
2.25.1