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(109-252-150-127.dynamic.spd-mgts.ru [109.252.150.127]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dmitry.osipenko) by madras.collabora.co.uk (Postfix) with ESMTPSA id F11386606EFD; Sun, 23 Jul 2023 01:02:53 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1690070574; bh=GUuN4Hv+kEehufgIB+sVRE0fxNfkqINjDEaKIO9+P1Q=; h=From:To:Cc:Subject:Date:From; b=AqGbeV6pC2fIb/cqylud/UkiC8DxdE0s/TJYG5HnWornI3FbcLwir3HZxPb08Rh63 DKmQkuJyJ9/New8LCz6h5fxvTfnjGAxOJ0q2u0+27itaQXiOjHcMRpBmA8sI7KBixO 9xnu4sVyGaGGXVMB7UFZt8Fx9irW6ZiuaWBbREuDxkmNNqULMlnUOyyoXK2us5Vfn1 KCcMz4pTLl7k79AFBBr1QLzvPvsi92e5aMo5GjeInznloDxr2Hhjj2Jo6z7GTtMrjv zoHkRk+sJbFteXAi+WwSt0mNQKw9rzt2wLnups1KKQSQ2Briyf8Ujy6eh9I+sktCbQ 7PcR+ZKCGuUGA== From: Dmitry Osipenko To: Rob Herring , Steven Price , Boris Brezillon Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com Subject: [PATCH v2] drm/panfrost: Sync IRQ by job's timeout handler Date: Sun, 23 Jul 2023 03:01:42 +0300 Message-ID: <20230723000142.206908-1-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772171644413362678 X-GMAIL-MSGID: 1772171644413362678 Panfrost IRQ handler may stuck for a long time, for example this happens when there is a bad HDMI connection and HDMI handler takes a long time to finish processing, holding Panfrost. Make Panfrost's job timeout handler to sync IRQ before checking fence signal status in order to prevent spurious job timeouts due to a slow IRQ processing. Signed-off-by: Dmitry Osipenko Reviewed-by: AngeloGioacchino Del Regno Tested-by: AngeloGioacchino Del Regno Reviewed-by: Steven Price --- Changelog: v2: - Moved synchronize_irq() after first signal-check to avoid unnecessary blocking on syncing. - Added warn message about high interrupt latency. drivers/gpu/drm/panfrost/panfrost_job.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index dbc597ab46fb..a7663d7847a2 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -720,6 +720,13 @@ static enum drm_gpu_sched_stat panfrost_job_timedout(struct drm_sched_job if (dma_fence_is_signaled(job->done_fence)) return DRM_GPU_SCHED_STAT_NOMINAL; + synchronize_irq(pfdev->js->irq); + + if (dma_fence_is_signaled(job->done_fence)) { + dev_warn(pfdev->dev, "unexpectedly high interrupt latency\n"); + return DRM_GPU_SCHED_STAT_NOMINAL; + } + dev_err(pfdev->dev, "gpu sched timeout, js=%d, config=0x%x, status=0x%x, head=0x%x, tail=0x%x, sched_job=%p", js, job_read(pfdev, JS_CONFIG(js)),