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Tue, 08 Sep 2020 08:19:01 -0700 (PDT) From: Neil Armstrong To: robh@kernel.org, tomeu.vizoso@collabora.com, steven.price@arm.com, alyssa.rosenzweig@collabora.com Subject: [PATCH 3/5] drm/panfrost: add support for reset quirk Date: Tue, 8 Sep 2020 17:18:51 +0200 Message-Id: <20200908151853.4837-4-narmstrong@baylibre.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20200908151853.4837-1-narmstrong@baylibre.com> References: <20200908151853.4837-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200908_111903_386537_F33A626F X-CRM114-Status: GOOD ( 14.10 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, Neil Armstrong , linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org The T820, G31 & G52 GPUs integratewd by Amlogic in the respective GXM, G12A/SM1 & G12B SoCs needs a quirk in the PWR registers at the GPU reset time. This adds a callback in the device compatible struct of permit this. Signed-off-by: Neil Armstrong --- drivers/gpu/drm/panfrost/panfrost_device.h | 3 +++ drivers/gpu/drm/panfrost/panfrost_gpu.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index 2cf1a6a13af8..4c9cd5452ba5 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -73,6 +73,9 @@ struct panfrost_compatible { /* IOMMU quirks flags */ unsigned long pgtbl_quirks; + + /* Vendor implementation quirks at reset time callback */ + void (*vendor_reset_quirk)(struct panfrost_device *pfdev); }; struct panfrost_device { diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c index e0f190e43813..c129aaf77790 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -62,6 +62,10 @@ int panfrost_gpu_soft_reset(struct panfrost_device *pfdev) gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_RESET_COMPLETED); gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET); + /* The Amlogic GPU integration needs quirks at this stage */ + if (pfdev->comp->vendor_reset_quirk) + pfdev->comp->vendor_reset_quirk(pfdev); + ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT, val, val & GPU_IRQ_RESET_COMPLETED, 100, 10000); -- 2.22.0 _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic