From patchwork Thu May 2 19:13:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094526 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44w4g11mjgz9s9N for ; Fri, 3 May 2019 05:13:33 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4g10jH7zDqPk for ; Fri, 3 May 2019 05:13:33 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4fr5CCZzDqP4 for ; Fri, 3 May 2019 05:13:24 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234020" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:20 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 1/7] media: aspeed: fix a kernel warning on clk control Date: Thu, 2 May 2019 12:13:11 -0700 Message-Id: <20190502191317.29698-2-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Video engine clock control functions in the Aspeed video engine driver are being called from multiple context without any protection so video clocks can be double disabled and eventually it causes a kernel warning with stack dump printing out like below: [ 515.540498] ------------[ cut here ]------------ [ 515.545174] WARNING: CPU: 0 PID: 1310 at drivers/clk/clk.c:684 clk_core_unprepare+0x13c/0x170 [ 515.553806] vclk-gate already unprepared [ 515.557841] CPU: 0 PID: 1310 Comm: obmc-ikvm Tainted: G W 5.0.6-df66fbc97853fbba90a0bfa44de32f3d5f7602b4 #1 [ 515.568973] Hardware name: Generic DT based system [ 515.573777] Backtrace: [ 515.576272] [<80107cdc>] (dump_backtrace) from [<80107f10>] (show_stack+0x20/0x24) [ 515.583930] r7:803a5614 r6:00000009 r5:00000000 r4:9d88fe1c [ 515.589712] [<80107ef0>] (show_stack) from [<80690184>] (dump_stack+0x20/0x28) [ 515.597053] [<80690164>] (dump_stack) from [<80116044>] (__warn.part.3+0xb4/0xdc) [ 515.604557] [<80115f90>] (__warn.part.3) from [<801160d8>] (warn_slowpath_fmt+0x6c/0x90) [ 515.612734] r6:000002ac r5:8080befc r4:80a07008 [ 515.617463] [<80116070>] (warn_slowpath_fmt) from [<803a5614>] (clk_core_unprepare+0x13c/0x170) [ 515.626167] r3:8080cdf4 r2:8080bfc0 [ 515.629834] r7:98d682a8 r6:9d8a9200 r5:9e5151a0 r4:97abd620 [ 515.635530] [<803a54d8>] (clk_core_unprepare) from [<803a76a4>] (clk_unprepare+0x34/0x3c) [ 515.643812] r5:9e5151a0 r4:97abd620 [ 515.647529] [<803a7670>] (clk_unprepare) from [<804f36ec>] (aspeed_video_off+0x38/0x50) [ 515.655539] r5:9e5151a0 r4:9e504000 [ 515.659242] [<804f36b4>] (aspeed_video_off) from [<804f4358>] (aspeed_video_release+0x90/0x114) [ 515.668036] r5:9e5044b0 r4:9e504000 [ 515.671643] [<804f42c8>] (aspeed_video_release) from [<804d302c>] (v4l2_release+0xd4/0xe8) [ 515.679999] r7:98d682a8 r6:9d087810 r5:9d8a9200 r4:9e504318 [ 515.685695] [<804d2f58>] (v4l2_release) from [<80236454>] (__fput+0x98/0x1c4) [ 515.692914] r5:9e51b608 r4:9d8a9200 [ 515.696597] [<802363bc>] (__fput) from [<802365e8>] (____fput+0x18/0x1c) [ 515.703315] r9:80a0700c r8:801011e4 r7:00000000 r6:80a64b9c r5:9d8e35a0 r4:9d8e38dc [ 515.711167] [<802365d0>] (____fput) from [<80131ca4>] (task_work_run+0x7c/0xa0) [ 515.718596] [<80131c28>] (task_work_run) from [<80106884>] (do_work_pending+0x4a8/0x578) [ 515.726777] r7:801011e4 r6:80a07008 r5:9d88ffb0 r4:ffffe000 [ 515.732466] [<801063dc>] (do_work_pending) from [<8010106c>] (slow_work_pending+0xc/0x20) [ 515.740727] Exception stack(0x9d88ffb0 to 0x9d88fff8) [ 515.745840] ffa0: 00000000 76f18094 00000000 00000000 [ 515.754122] ffc0: 00000007 00176778 7eda4c20 00000006 00000000 00000000 48e20fa4 00000000 [ 515.762386] ffe0: 00000002 7eda4b08 00000000 48f91efc 80000010 00000007 [ 515.769097] r10:00000000 r9:9d88e000 r8:801011e4 r7:00000006 r6:7eda4c20 r5:00176778 [ 515.777006] r4:00000007 [ 515.779558] ---[ end trace 12c04aadef8afbbb ]--- [ 515.784176] ------------[ cut here ]------------ [ 515.788817] WARNING: CPU: 0 PID: 1310 at drivers/clk/clk.c:825 clk_core_disable+0x18c/0x204 [ 515.797161] eclk-gate already disabled [ 515.800916] CPU: 0 PID: 1310 Comm: obmc-ikvm Tainted: G W 5.0.6-df66fbc97853fbba90a0bfa44de32f3d5f7602b4 #1 [ 515.811945] Hardware name: Generic DT based system [ 515.816730] Backtrace: [ 515.819210] [<80107cdc>] (dump_backtrace) from [<80107f10>] (show_stack+0x20/0x24) [ 515.826782] r7:803a5900 r6:00000009 r5:00000000 r4:9d88fe04 [ 515.832454] [<80107ef0>] (show_stack) from [<80690184>] (dump_stack+0x20/0x28) [ 515.839687] [<80690164>] (dump_stack) from [<80116044>] (__warn.part.3+0xb4/0xdc) [ 515.847170] [<80115f90>] (__warn.part.3) from [<801160d8>] (warn_slowpath_fmt+0x6c/0x90) [ 515.855247] r6:00000339 r5:8080befc r4:80a07008 [ 515.859868] [<80116070>] (warn_slowpath_fmt) from [<803a5900>] (clk_core_disable+0x18c/0x204) [ 515.868385] r3:8080cdd0 r2:8080c00c [ 515.871957] r7:98d682a8 r6:9d8a9200 r5:97abd560 r4:97abd560 [ 515.877615] [<803a5774>] (clk_core_disable) from [<803a59a0>] (clk_core_disable_lock+0x28/0x34) [ 515.886301] r7:98d682a8 r6:9d8a9200 r5:97abd560 r4:a0000013 [ 515.891960] [<803a5978>] (clk_core_disable_lock) from [<803a7714>] (clk_disable+0x2c/0x30) [ 515.900216] r5:9e5151a0 r4:9e515f60 [ 515.903816] [<803a76e8>] (clk_disable) from [<804f36f8>] (aspeed_video_off+0x44/0x50) [ 515.911656] [<804f36b4>] (aspeed_video_off) from [<804f4358>] (aspeed_video_release+0x90/0x114) [ 515.920341] r5:9e5044b0 r4:9e504000 [ 515.923921] [<804f42c8>] (aspeed_video_release) from [<804d302c>] (v4l2_release+0xd4/0xe8) [ 515.932184] r7:98d682a8 r6:9d087810 r5:9d8a9200 r4:9e504318 [ 515.937851] [<804d2f58>] (v4l2_release) from [<80236454>] (__fput+0x98/0x1c4) [ 515.944980] r5:9e51b608 r4:9d8a9200 [ 515.948559] [<802363bc>] (__fput) from [<802365e8>] (____fput+0x18/0x1c) [ 515.955257] r9:80a0700c r8:801011e4 r7:00000000 r6:80a64b9c r5:9d8e35a0 r4:9d8e38dc [ 515.963008] [<802365d0>] (____fput) from [<80131ca4>] (task_work_run+0x7c/0xa0) [ 515.970333] [<80131c28>] (task_work_run) from [<80106884>] (do_work_pending+0x4a8/0x578) [ 515.978421] r7:801011e4 r6:80a07008 r5:9d88ffb0 r4:ffffe000 [ 515.984086] [<801063dc>] (do_work_pending) from [<8010106c>] (slow_work_pending+0xc/0x20) [ 515.992247] Exception stack(0x9d88ffb0 to 0x9d88fff8) [ 515.997296] ffa0: 00000000 76f18094 00000000 00000000 [ 516.005473] ffc0: 00000007 00176778 7eda4c20 00000006 00000000 00000000 48e20fa4 00000000 [ 516.013642] ffe0: 00000002 7eda4b08 00000000 48f91efc 80000010 00000007 [ 516.020257] r10:00000000 r9:9d88e000 r8:801011e4 r7:00000006 r6:7eda4c20 r5:00176778 [ 516.028072] r4:00000007 [ 516.030606] ---[ end trace 12c04aadef8afbbc ]--- To prevent this issue, this commit adds spinlock protection and clock status checking logic into the Aspeed video engine driver. Signed-off-by: Jae Hyun Yoo Reviewed-by: Eddie James --- drivers/media/platform/aspeed-video.c | 32 ++++++++++++++++++++++++--- 1 file changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index 55c55a68b016..2dac6d20b180 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -187,6 +187,7 @@ enum { VIDEO_STREAMING, VIDEO_FRAME_INPRG, VIDEO_STOPPED, + VIDEO_CLOCKS_ON, }; struct aspeed_video_addr { @@ -483,19 +484,29 @@ static void aspeed_video_enable_mode_detect(struct aspeed_video *video) static void aspeed_video_off(struct aspeed_video *video) { + if (!test_bit(VIDEO_CLOCKS_ON, &video->flags)) + return; + /* Disable interrupts */ aspeed_video_write(video, VE_INTERRUPT_CTRL, 0); /* Turn off the relevant clocks */ clk_disable_unprepare(video->vclk); clk_disable_unprepare(video->eclk); + + clear_bit(VIDEO_CLOCKS_ON, &video->flags); } static void aspeed_video_on(struct aspeed_video *video) { + if (test_bit(VIDEO_CLOCKS_ON, &video->flags)) + return; + /* Turn on the relevant clocks */ clk_prepare_enable(video->eclk); clk_prepare_enable(video->vclk); + + set_bit(VIDEO_CLOCKS_ON, &video->flags); } static void aspeed_video_bufs_done(struct aspeed_video *video, @@ -513,12 +524,14 @@ static void aspeed_video_bufs_done(struct aspeed_video *video, static void aspeed_video_irq_res_change(struct aspeed_video *video) { + spin_lock(&video->lock); dev_dbg(video->dev, "Resolution changed; resetting\n"); set_bit(VIDEO_RES_CHANGE, &video->flags); clear_bit(VIDEO_FRAME_INPRG, &video->flags); aspeed_video_off(video); + spin_unlock(&video->lock); aspeed_video_bufs_done(video, VB2_BUF_STATE_ERROR); schedule_delayed_work(&video->res_work, RESOLUTION_CHANGE_DELAY); @@ -938,9 +951,13 @@ static void aspeed_video_init_regs(struct aspeed_video *video) static void aspeed_video_start(struct aspeed_video *video) { + unsigned long flags; + + spin_lock_irqsave(&video->lock, flags); aspeed_video_on(video); aspeed_video_init_regs(video); + spin_unlock_irqrestore(&video->lock, flags); /* Resolution set to 640x480 if no signal found */ aspeed_video_get_resolution(video); @@ -956,6 +973,9 @@ static void aspeed_video_start(struct aspeed_video *video) static void aspeed_video_stop(struct aspeed_video *video) { + unsigned long flags; + + spin_lock_irqsave(&video->lock, flags); set_bit(VIDEO_STOPPED, &video->flags); cancel_delayed_work_sync(&video->res_work); @@ -969,6 +989,7 @@ static void aspeed_video_stop(struct aspeed_video *video) video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL; video->flags = 0; + spin_unlock_irqrestore(&video->lock, flags); } static int aspeed_video_querycap(struct file *file, void *fh, @@ -1306,16 +1327,21 @@ static void aspeed_video_resolution_work(struct work_struct *work) struct delayed_work *dwork = to_delayed_work(work); struct aspeed_video *video = container_of(dwork, struct aspeed_video, res_work); - u32 input_status = video->v4l2_input_status; + unsigned long flags; + u32 input_status; + spin_lock_irqsave(&video->lock, flags); + input_status = video->v4l2_input_status; aspeed_video_on(video); /* Exit early in case no clients remain */ - if (test_bit(VIDEO_STOPPED, &video->flags)) + if (test_bit(VIDEO_STOPPED, &video->flags)) { + spin_unlock_irqrestore(&video->lock, flags); goto done; + } aspeed_video_init_regs(video); - + spin_unlock_irqrestore(&video->lock, flags); aspeed_video_get_resolution(video); if (video->detected_timings.width != video->active_timings.width || From patchwork Thu May 2 19:13:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094527 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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) by ozlabs.org (Postfix) with ESMTPS id 44w4g44vMcz9s9G for ; Fri, 3 May 2019 05:13:36 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4g40Zg4zDqQG for ; Fri, 3 May 2019 05:13:36 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4fs36KszDqPC for ; Fri, 3 May 2019 05:13:25 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234021" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:21 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 2/7] media: aspeed: refine clock control logic Date: Thu, 2 May 2019 12:13:12 -0700 Message-Id: <20190502191317.29698-3-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Currently, this driver calls clk_prepare and clk_unprepare from interrupt context too but these should be called from sleepable context only. To fix this issue, this commit splits out clk_enable/disable and clk_prepare/unprepare, and it places clk_prepare/unprepare calls into the module probe/remove function. Signed-off-by: Jae Hyun Yoo Reviewed-by: Eddie James --- drivers/media/platform/aspeed-video.c | 38 ++++++++++++++++++++------- 1 file changed, 29 insertions(+), 9 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index 2dac6d20b180..8f4cac41da14 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -491,8 +491,8 @@ static void aspeed_video_off(struct aspeed_video *video) aspeed_video_write(video, VE_INTERRUPT_CTRL, 0); /* Turn off the relevant clocks */ - clk_disable_unprepare(video->vclk); - clk_disable_unprepare(video->eclk); + clk_disable(video->vclk); + clk_disable(video->eclk); clear_bit(VIDEO_CLOCKS_ON, &video->flags); } @@ -503,8 +503,8 @@ static void aspeed_video_on(struct aspeed_video *video) return; /* Turn on the relevant clocks */ - clk_prepare_enable(video->eclk); - clk_prepare_enable(video->vclk); + clk_enable(video->eclk); + clk_enable(video->vclk); set_bit(VIDEO_CLOCKS_ON, &video->flags); } @@ -1628,12 +1628,21 @@ static int aspeed_video_init(struct aspeed_video *video) return PTR_ERR(video->eclk); } + rc = clk_prepare(video->eclk); + if (rc) + return rc; + video->vclk = devm_clk_get(dev, "vclk"); if (IS_ERR(video->vclk)) { dev_err(dev, "Unable to get VCLK\n"); - return PTR_ERR(video->vclk); + rc = PTR_ERR(video->vclk); + goto err_unprepare_eclk; } + rc = clk_prepare(video->vclk); + if (rc) + goto err_unprepare_eclk; + rc = of_reserved_mem_device_init(dev); if (rc) { dev_err(dev, "Unable to reserve memory\n"); @@ -1643,20 +1652,26 @@ static int aspeed_video_init(struct aspeed_video *video) rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); if (rc) { dev_err(dev, "Failed to set DMA mask\n"); - of_reserved_mem_device_release(dev); - return rc; + goto err_release_reserved_mem; } if (!aspeed_video_alloc_buf(video, &video->jpeg, VE_JPEG_HEADER_SIZE)) { dev_err(dev, "Failed to allocate DMA for JPEG header\n"); - of_reserved_mem_device_release(dev); - return rc; + goto err_release_reserved_mem; } aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420); return 0; + +err_release_reserved_mem: + of_reserved_mem_device_release(dev); + clk_unprepare(video->vclk); +err_unprepare_eclk: + clk_unprepare(video->eclk); + + return rc; } static int aspeed_video_probe(struct platform_device *pdev) @@ -1700,6 +1715,11 @@ static int aspeed_video_remove(struct platform_device *pdev) struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); struct aspeed_video *video = to_aspeed_video(v4l2_dev); + aspeed_video_off(video); + + clk_unprepare(video->vclk); + clk_unprepare(video->eclk); + video_unregister_device(&video->vdev); vb2_queue_release(&video->queue); From patchwork Thu May 2 19:13:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094528 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44w4g71qpnz9s9G for ; Fri, 3 May 2019 05:13:39 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4g70gGszDqPF for ; Fri, 3 May 2019 05:13:39 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4fs5D17zDqP4 for ; Fri, 3 May 2019 05:13:25 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234023" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:22 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 3/7] media: aspeed: change irq to threaded irq Date: Thu, 2 May 2019 12:13:13 -0700 Message-Id: <20190502191317.29698-4-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Differently fron other Aspeed drivers, this driver calls clock control APIs in interrupt context. Since ECLK is coupled with a reset bit in clk-aspeed module, aspeed_clk_enable will make 10ms of busy waiting delay for triggering the reset and it will eventually disturb other drivers' interrupt handling. To fix this issue, this commit changes this driver's irq to threaded irq so that the delay can be happened in a thread context. Signed-off-by: Jae Hyun Yoo Reviewed-by: Eddie James --- drivers/media/platform/aspeed-video.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index 8f4cac41da14..e1bdafeed007 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -1615,8 +1615,9 @@ static int aspeed_video_init(struct aspeed_video *video) return -ENODEV; } - rc = devm_request_irq(dev, irq, aspeed_video_irq, IRQF_SHARED, - DEVICE_NAME, video); + rc = devm_request_threaded_irq(dev, irq, NULL, aspeed_video_irq, + IRQF_ONESHOT | IRQF_SHARED, DEVICE_NAME, + video); if (rc < 0) { dev_err(dev, "Unable to request IRQ %d\n", irq); return rc; From patchwork Thu May 2 19:13:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094529 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44w4g96cghz9s9G for ; Fri, 3 May 2019 05:13:41 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4g95ZgVzDqRr for ; Fri, 3 May 2019 05:13:41 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4fs5fPHzDqPF for ; Fri, 3 May 2019 05:13:25 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234027" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:23 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 4/7] media: aspeed: remove IRQF_SHARED flag Date: Thu, 2 May 2019 12:13:14 -0700 Message-Id: <20190502191317.29698-5-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Video Engine has a dedicated interrupt line so this driver doesn't need to use IRQF_SHARED flag so remove it. Also, it'd be good for following what Thomas recommended in the IRQF_ONESHOT support patch like below: "Note that for now IRQF_ONESHOT cannot be used with IRQF_SHARED to avoid complex accounting mechanisms." Signed-off-by: Jae Hyun Yoo Reviewed-by: Eddie James --- drivers/media/platform/aspeed-video.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index e1bdafeed007..d88e8d238c49 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -1616,8 +1616,7 @@ static int aspeed_video_init(struct aspeed_video *video) } rc = devm_request_threaded_irq(dev, irq, NULL, aspeed_video_irq, - IRQF_ONESHOT | IRQF_SHARED, DEVICE_NAME, - video); + IRQF_ONESHOT, DEVICE_NAME, video); if (rc < 0) { dev_err(dev, "Unable to request IRQ %d\n", irq); return rc; From patchwork Thu May 2 19:13:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094530 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44w4gD6KLdz9s9G for ; Fri, 3 May 2019 05:13:44 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4gD57rszDqT7 for ; Fri, 3 May 2019 05:13:44 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4ft4VqRzDqP4 for ; Fri, 3 May 2019 05:13:26 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234033" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:25 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 5/7] media: aspeed: reduce noisy log printing outs Date: Thu, 2 May 2019 12:13:15 -0700 Message-Id: <20190502191317.29698-6-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Currently, this driver prints out too much log messages when a mode change happens, video turned off by screen saver and etc. Actually, all cases are reported to user space properly. Also, these are not critical errors but recoverable things, so this commit changes the log level of some noisy printing outs. Signed-off-by: Jae Hyun Yoo Reviewed-by: Eddie James --- drivers/media/platform/aspeed-video.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index d88e8d238c49..6dc66d6e8b8b 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -441,7 +441,7 @@ static int aspeed_video_start_frame(struct aspeed_video *video) if (!(seq_ctrl & VE_SEQ_CTRL_COMP_BUSY) || !(seq_ctrl & VE_SEQ_CTRL_CAP_BUSY)) { - dev_err(video->dev, "Engine busy; don't start frame\n"); + dev_dbg(video->dev, "Engine busy; don't start frame\n"); return -EBUSY; } @@ -771,7 +771,7 @@ static void aspeed_video_get_resolution(struct aspeed_video *video) res_check(video), MODE_DETECT_TIMEOUT); if (!rc) { - dev_err(video->dev, "Timed out; first mode detect\n"); + dev_dbg(video->dev, "Timed out; first mode detect\n"); clear_bit(VIDEO_RES_DETECT, &video->flags); return; } @@ -789,7 +789,7 @@ static void aspeed_video_get_resolution(struct aspeed_video *video) MODE_DETECT_TIMEOUT); clear_bit(VIDEO_RES_DETECT, &video->flags); if (!rc) { - dev_err(video->dev, "Timed out; second mode detect\n"); + dev_dbg(video->dev, "Timed out; second mode detect\n"); return; } @@ -823,7 +823,7 @@ static void aspeed_video_get_resolution(struct aspeed_video *video) } while (invalid_resolution && (tries++ < INVALID_RESOLUTION_RETRIES)); if (invalid_resolution) { - dev_err(video->dev, "Invalid resolution detected\n"); + dev_dbg(video->dev, "Invalid resolution detected\n"); return; } @@ -1471,7 +1471,7 @@ static void aspeed_video_stop_streaming(struct vb2_queue *q) !test_bit(VIDEO_FRAME_INPRG, &video->flags), STOP_TIMEOUT); if (!rc) { - dev_err(video->dev, "Timed out when stopping streaming\n"); + dev_dbg(video->dev, "Timed out when stopping streaming\n"); /* * Need to force stop any DMA and try and get HW into a good From patchwork Thu May 2 19:13:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094531 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44w4gJ3YDxz9s9G for ; Fri, 3 May 2019 05:13:48 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4gJ2Jr7zDqPy for ; Fri, 3 May 2019 05:13:48 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4fv5Zz4zDqPG for ; Fri, 3 May 2019 05:13:27 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234037" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:26 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 6/7] media: aspeed: remove checking of VE_INTERRUPT_CAPTURE_COMPLETE Date: Thu, 2 May 2019 12:13:16 -0700 Message-Id: <20190502191317.29698-7-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" VE_INTERRUPT_CAPTURE_COMPLETE and VE_INTERRUPT_COMP_COMPLETE are not set at the same time but the current interrupt handling mechanism of this driver doesn't clear the interrupt flag until both two are set, and this behavior causes unnecessary interrupt handler calls. In fact, this driver provides JPEG format only so taking care of the VE_INTERRUPT_COMP_COMPLETE is enough for getting compressed image frame so this commit gets rid of the VE_INTERRUPT_CAPTURE_COMPLETE checking logic to simplify the logic. Handling of VE_INTERRUPT_CAPTURE_COMPLETE could be added back later when it's actually needed. Signed-off-by: Jae Hyun Yoo Reviewed-by: Eddie James Reviewed-by: Andrew Jeffery --- drivers/media/platform/aspeed-video.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index 6dc66d6e8b8b..8d0bb395e46d 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -463,8 +463,7 @@ static int aspeed_video_start_frame(struct aspeed_video *video) aspeed_video_write(video, VE_COMP_ADDR, addr); aspeed_video_update(video, VE_INTERRUPT_CTRL, 0, - VE_INTERRUPT_COMP_COMPLETE | - VE_INTERRUPT_CAPTURE_COMPLETE); + VE_INTERRUPT_COMP_COMPLETE); aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_TRIG_CAPTURE | VE_SEQ_CTRL_TRIG_COMP); @@ -570,8 +569,7 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg) } } - if ((sts & VE_INTERRUPT_COMP_COMPLETE) && - (sts & VE_INTERRUPT_CAPTURE_COMPLETE)) { + if (sts & VE_INTERRUPT_COMP_COMPLETE) { struct aspeed_video_buffer *buf; u32 frame_size = aspeed_video_read(video, VE_OFFSET_COMP_STREAM); @@ -600,11 +598,9 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg) VE_SEQ_CTRL_FORCE_IDLE | VE_SEQ_CTRL_TRIG_COMP, 0); aspeed_video_update(video, VE_INTERRUPT_CTRL, - VE_INTERRUPT_COMP_COMPLETE | - VE_INTERRUPT_CAPTURE_COMPLETE, 0); + VE_INTERRUPT_COMP_COMPLETE, 0); aspeed_video_write(video, VE_INTERRUPT_STATUS, - VE_INTERRUPT_COMP_COMPLETE | - VE_INTERRUPT_CAPTURE_COMPLETE); + VE_INTERRUPT_COMP_COMPLETE); if (test_bit(VIDEO_STREAMING, &video->flags) && buf) aspeed_video_start_frame(video); From patchwork Thu May 2 19:13:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 1094532 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44w4gL5VLmz9s9G for ; Fri, 3 May 2019 05:13:50 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44w4gL4VKPzDqTG for ; Fri, 3 May 2019 05:13:50 +1000 (AEST) X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.65; helo=mga03.intel.com; envelope-from=jae.hyun.yoo@linux.intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44w4fw6P6mzDqQ0 for ; Fri, 3 May 2019 05:13:28 +1000 (AEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2019 12:13:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,422,1549958400"; d="scan'208";a="154234042" Received: from maru.jf.intel.com ([10.54.51.75]) by FMSMGA003.fm.intel.com with ESMTP; 02 May 2019 12:13:27 -0700 From: Jae Hyun Yoo To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery Subject: [PATCH 7/7] media: aspeed: refine interrupt handling logic Date: Thu, 2 May 2019 12:13:17 -0700 Message-Id: <20190502191317.29698-8-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> References: <20190502191317.29698-1-jae.hyun.yoo@linux.intel.com> MIME-Version: 1.0 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-media@vger.kernel.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" There are cases that interrupt bits are cleared by a 500ms delayed work which causes unnecessary irq calls. Also, the current interrupt handler returns IRQ_HANDLED always but it should return IRQ_NONE if there is any unhandled interrupt. So this commit refines the interrupt handling logic to fix these issues. Signed-off-by: Jae Hyun Yoo Reviewed-by: Andrew Jeffery Reviewed-by: Eddie James --- drivers/media/platform/aspeed-video.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index 8d0bb395e46d..98944a911998 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -488,6 +488,7 @@ static void aspeed_video_off(struct aspeed_video *video) /* Disable interrupts */ aspeed_video_write(video, VE_INTERRUPT_CTRL, 0); + aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xffffffff); /* Turn off the relevant clocks */ clk_disable(video->vclk); @@ -556,7 +557,7 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg) VE_INTERRUPT_MODE_DETECT, 0); aspeed_video_write(video, VE_INTERRUPT_STATUS, VE_INTERRUPT_MODE_DETECT); - + sts &= ~VE_INTERRUPT_MODE_DETECT; set_bit(VIDEO_MODE_DETECT_DONE, &video->flags); wake_up_interruptible_all(&video->wait); } else { @@ -601,12 +602,12 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg) VE_INTERRUPT_COMP_COMPLETE, 0); aspeed_video_write(video, VE_INTERRUPT_STATUS, VE_INTERRUPT_COMP_COMPLETE); - + sts &= ~VE_INTERRUPT_COMP_COMPLETE; if (test_bit(VIDEO_STREAMING, &video->flags) && buf) aspeed_video_start_frame(video); } - return IRQ_HANDLED; + return sts ? IRQ_NONE : IRQ_HANDLED; } static void aspeed_video_check_and_set_polarity(struct aspeed_video *video)