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From:   Jonathan Marek <jonathan@marek.ca>
To:     freedreno@lists.freedesktop.org
Cc:     Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Jordan Crouse <jcrouse@codeaurora.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
        Eric Anholt <eric@anholt.net>,
        Akhil P Oommen <akhilpo@codeaurora.org>,
        Sharat Masetty <smasetty@codeaurora.org>,
        linux-arm-msm@vger.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@lists.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] drm/msm/a6xx: fix for kernels without CONFIG_NVMEM
Date:   Tue, 16 Feb 2021 15:09:07 -0500
Message-Id: <20210216200909.19039-1-jonathan@marek.ca>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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@marek.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