linux-kernel - [PATCH] drm/msm/a6xx: fix for kernels without CONFIG

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Message-Id: <20210216200909.19039-1-jonathan@marek.ca>
Date:   Tue, 16 Feb 2021 15:09:07 -0500
From:   Jonathan Marek <jonathan@...ek.ca>
To:     freedreno@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Eric Anholt <eric@...olt.net>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] drm/msm/a6xx: fix for kernels without CONFIG_NVMEM

Ignore nvmem_cell_get() EOPNOTSUPP error in the same way as a ENOENT error,
to fix the case where the kernel was compiled without CONFIG_NVMEM.

Fixes: fe7952c629da ("drm/msm: Add speed-bin support to a618 gpu")
Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index ba8e9d3cf0fe..7fe5d97606aa 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1356,10 +1356,10 @@ static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
 
 	cell = nvmem_cell_get(dev, "speed_bin");
 	/*
-	 * -ENOENT means that the platform doesn't support speedbin which is
-	 * fine
+	 * -ENOENT means no speed bin in device tree,
+	 * -EOPNOTSUPP means kernel was built without CONFIG_NVMEM
 	 */
-	if (PTR_ERR(cell) == -ENOENT)
+	if (PTR_ERR(cell) == -ENOENT || PTR_ERR(cell) == -EOPNOTSUPP)
 		return 0;
 	else if (IS_ERR(cell)) {
 		DRM_DEV_ERROR(dev,
-- 
2.26.1