linux-kernel - [PATCH AUTOSEL 5.5 529/542] drm/amdgpu/smu10: fix smu10_get_clock_by_type_with

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Message-Id: <20200214154854.6746-529-sashal@kernel.org>
Date:   Fri, 14 Feb 2020 10:48:41 -0500
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 5.5 529/542] drm/amdgpu/smu10: fix smu10_get_clock_by_type_with_latency

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

[ Upstream commit 4d0a72b66065dd7e274bad6aa450196d42fd8f84 ]

Only send non-0 clocks to DC for validation.  This mirrors
what the windows driver does.

Bug: https://gitlab.freedesktop.org/drm/amd/issues/963
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/powerplay/hwmgr/smu10_hwmgr.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
index 1115761982a78..627a42e8fd318 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
@@ -1026,12 +1026,15 @@ static int smu10_get_clock_by_type_with_latency(struct pp_hwmgr *hwmgr,
 
 	clocks->num_levels = 0;
 	for (i = 0; i < pclk_vol_table->count; i++) {
-		clocks->data[i].clocks_in_khz = pclk_vol_table->entries[i].clk * 10;
-		clocks->data[i].latency_in_us = latency_required ?
-						smu10_get_mem_latency(hwmgr,
-						pclk_vol_table->entries[i].clk) :
-						0;
-		clocks->num_levels++;
+		if (pclk_vol_table->entries[i].clk) {
+			clocks->data[clocks->num_levels].clocks_in_khz =
+				pclk_vol_table->entries[i].clk * 10;
+			clocks->data[clocks->num_levels].latency_in_us = latency_required ?
+				smu10_get_mem_latency(hwmgr,
+						      pclk_vol_table->entries[i].clk) :
+				0;
+			clocks->num_levels++;
+		}
 	}
 
 	return 0;
-- 
2.20.1