From patchwork Wed May 18 12:29:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunfei Dong X-Patchwork-Id: 574055 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24718C433EF for ; Wed, 18 May 2022 12:35:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236921AbiERMf0 (ORCPT ); Wed, 18 May 2022 08:35:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237030AbiERMet (ORCPT ); Wed, 18 May 2022 08:34:49 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2648118014; Wed, 18 May 2022 05:30:16 -0700 (PDT) X-UUID: 19eeb401b9084227b05908056f605ea7-20220518 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5, REQID:243a4f0a-a5a8-4cb1-9ab0-246d8a48bfc6, OB:0, LO B:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:95,FILE:0,RULE:Release_Ham,AC TION:release,TS:90 X-CID-INFO: VERSION:1.1.5, REQID:243a4f0a-a5a8-4cb1-9ab0-246d8a48bfc6, OB:0, LOB: 0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:95,FILE:0,RULE:Spam_GS981B3D,AC TION:quarantine,TS:90 X-CID-META: VersionHash:2a19b09, CLOUDID:605bb779-5ef6-470b-96c9-bdb8ced32786, C OID:202a197380a9,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,QS:0,BEC:nil X-UUID: 19eeb401b9084227b05908056f605ea7-20220518 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1733468529; Wed, 18 May 2022 20:30:11 +0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Wed, 18 May 2022 20:30:10 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 18 May 2022 20:30:09 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 18 May 2022 20:30:08 +0800 From: Yunfei Dong To: Yunfei Dong , Alexandre Courbot , Nicolas Dufresne , "Hans Verkuil" , AngeloGioacchino Del Regno , Benjamin Gaignard , Tiffany Lin , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger , Tomasz Figa CC: George Sun , Xiaoyong Lu , Hsin-Yi Wang , Fritz Koenig , Daniel Vetter , dri-devel , Irui Wang , "Steve Cho" , , , , , , Subject: [PATCH v7, 2/7] media: mediatek: vcodec: Add to support lat soc hardware Date: Wed, 18 May 2022 20:29:59 +0800 Message-ID: <20220518123004.18286-3-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220518123004.18286-1-yunfei.dong@mediatek.com> References: <20220518123004.18286-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add lat soc compatible and to support lat soc power/clk helper. Signed-off-by: Yunfei Dong --- .../platform/mediatek/vcodec/mtk_vcodec_dec_hw.c | 12 +++++++++--- .../platform/mediatek/vcodec/mtk_vcodec_dec_hw.h | 2 ++ .../platform/mediatek/vcodec/mtk_vcodec_dec_pm.c | 16 ++++++++++++++++ .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 + 4 files changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c index 14bed2bd4283..376db0e433d7 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c @@ -28,6 +28,10 @@ static const struct of_device_id mtk_vdec_hw_match[] = { .compatible = "mediatek,mtk-vcodec-core", .data = (void *)MTK_VDEC_CORE, }, + { + .compatible = "mediatek,mtk-vcodec-lat-soc", + .data = (void *)MTK_VDEC_LAT_SOC, + }, {}, }; MODULE_DEVICE_TABLE(of, mtk_vdec_hw_match); @@ -166,9 +170,11 @@ static int mtk_vdec_hw_probe(struct platform_device *pdev) subdev_dev->reg_base[VDEC_HW_SYS] = main_dev->reg_base[VDEC_HW_SYS]; set_bit(subdev_dev->hw_idx, main_dev->subdev_bitmap); - ret = mtk_vdec_hw_init_irq(subdev_dev); - if (ret) - goto err; + if (IS_SUPPORT_VDEC_HW_IRQ(hw_idx)) { + ret = mtk_vdec_hw_init_irq(subdev_dev); + if (ret) + goto err; + } subdev_dev->reg_base[VDEC_HW_MISC] = devm_platform_ioremap_resource(pdev, 0); diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h index a63e4b1b81c3..36faa8d9d681 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h @@ -17,6 +17,8 @@ #define VDEC_IRQ_CLR 0x10 #define VDEC_IRQ_CFG_REG 0xa4 +#define IS_SUPPORT_VDEC_HW_IRQ(hw_idx) ((hw_idx) != MTK_VDEC_LAT_SOC) + /** * enum mtk_vdec_hw_reg_idx - subdev hardware register base index * @VDEC_HW_SYS : vdec soc register index diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c index 0fb7e5ba635b..d69faa463d04 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c @@ -174,6 +174,14 @@ static void mtk_vcodec_dec_child_dev_on(struct mtk_vcodec_dev *vdec_dev, mtk_vcodec_dec_pw_on(pm); mtk_vcodec_dec_clock_on(pm); } + + if (hw_idx == MTK_VDEC_LAT0) { + pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC); + if (pm) { + mtk_vcodec_dec_pw_on(pm); + mtk_vcodec_dec_clock_on(pm); + } + } } static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dev *vdec_dev, @@ -186,6 +194,14 @@ static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dev *vdec_dev, mtk_vcodec_dec_clock_off(pm); mtk_vcodec_dec_pw_off(pm); } + + if (hw_idx == MTK_VDEC_LAT0) { + pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC); + if (pm) { + mtk_vcodec_dec_clock_off(pm); + mtk_vcodec_dec_pw_off(pm); + } + } } void mtk_vcodec_dec_enable_hardware(struct mtk_vcodec_ctx *ctx, int hw_idx) diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h index a29041a0b7e0..0e3db8ccb398 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h @@ -104,6 +104,7 @@ enum mtk_vdec_hw_id { MTK_VDEC_CORE, MTK_VDEC_LAT0, MTK_VDEC_LAT1, + MTK_VDEC_LAT_SOC, MTK_VDEC_HW_MAX, }; From patchwork Wed May 18 12:30:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunfei Dong X-Patchwork-Id: 574053 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F3D5C433F5 for ; Wed, 18 May 2022 12:35:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236971AbiERMfd (ORCPT ); Wed, 18 May 2022 08:35:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237231AbiERMeu (ORCPT ); Wed, 18 May 2022 08:34:50 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32561197F4E; Wed, 18 May 2022 05:30:20 -0700 (PDT) X-UUID: c2b6f90a227f4b16803f52429bb89bb1-20220518 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5, REQID:9257ad56-13f0-4e01-b558-259c11f21b04, OB:0, LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:2a19b09, CLOUDID:0d4ca7e2-edbf-4bd4-8a34-dfc5f7bb086d, C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:0,BEC:nil X-UUID: c2b6f90a227f4b16803f52429bb89bb1-20220518 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1904075948; Wed, 18 May 2022 20:30:15 +0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Wed, 18 May 2022 20:30:14 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 18 May 2022 20:30:14 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 18 May 2022 20:30:12 +0800 From: Yunfei Dong To: Yunfei Dong , Alexandre Courbot , Nicolas Dufresne , "Hans Verkuil" , AngeloGioacchino Del Regno , Benjamin Gaignard , Tiffany Lin , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger , Tomasz Figa CC: George Sun , Xiaoyong Lu , Hsin-Yi Wang , Fritz Koenig , Daniel Vetter , dri-devel , Irui Wang , "Steve Cho" , , , , , , Subject: [PATCH v7, 5/7] media: mediatek: vcodec: Different codec using different capture format Date: Wed, 18 May 2022 20:30:02 +0800 Message-ID: <20220518123004.18286-6-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220518123004.18286-1-yunfei.dong@mediatek.com> References: <20220518123004.18286-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Vp8 need to use MM21, but vp9 and h264 need to use HyFbc mode for mt8195. Vp8/vp9/h264 use the same MM21 format for mt8192. Signed-off-by: Yunfei Dong --- .../platform/mediatek/vcodec/mtk_vcodec_dec.c | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c index 52e5d36aa912..254649240b34 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c @@ -35,6 +35,44 @@ mtk_vdec_find_format(struct v4l2_format *f, return NULL; } +static bool mtk_vdec_get_cap_fmt(struct mtk_vcodec_ctx *ctx, int format_index) +{ + const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata; + const struct mtk_video_fmt *fmt; + struct mtk_q_data *q_data; + int num_frame_count = 0, i; + bool ret = true; + + for (i = 0; i < *dec_pdata->num_formats; i++) { + if (dec_pdata->vdec_formats[i].type != MTK_FMT_FRAME) + continue; + + num_frame_count++; + } + + if (num_frame_count == 1) + return true; + + fmt = &dec_pdata->vdec_formats[format_index]; + q_data = &ctx->q_data[MTK_Q_DATA_SRC]; + switch (q_data->fmt->fourcc) { + case V4L2_PIX_FMT_VP8_FRAME: + if (fmt->fourcc == V4L2_PIX_FMT_MM21) + ret = true; + break; + case V4L2_PIX_FMT_H264_SLICE: + case V4L2_PIX_FMT_VP9_FRAME: + if (fmt->fourcc == V4L2_PIX_FMT_MM21) + ret = false; + break; + default: + ret = true; + break; + }; + + return ret; +} + static struct mtk_q_data *mtk_vdec_get_q_data(struct mtk_vcodec_ctx *ctx, enum v4l2_buf_type type) { @@ -566,6 +604,9 @@ static int vidioc_enum_fmt(struct v4l2_fmtdesc *f, void *priv, dec_pdata->vdec_formats[i].type != MTK_FMT_FRAME) continue; + if (!output_queue && !mtk_vdec_get_cap_fmt(ctx, i)) + continue; + if (j == f->index) break; ++j; From patchwork Wed May 18 12:30:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunfei Dong X-Patchwork-Id: 574054 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01F49C4321E for ; Wed, 18 May 2022 12:35:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237384AbiERMf3 (ORCPT ); Wed, 18 May 2022 08:35:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237230AbiERMeu (ORCPT ); Wed, 18 May 2022 08:34:50 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 716D119C381; Wed, 18 May 2022 05:30:23 -0700 (PDT) X-UUID: 66523d1cdb524d2c8fb2ea77d8fce364-20220518 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5, REQID:92b352c9-2b45-4098-a291-eff6c3a1f171, OB:0, LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:2a19b09, CLOUDID:694ca7e2-edbf-4bd4-8a34-dfc5f7bb086d, C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:0,BEC:nil X-UUID: 66523d1cdb524d2c8fb2ea77d8fce364-20220518 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1067644228; Wed, 18 May 2022 20:30:19 +0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Wed, 18 May 2022 20:30:16 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 18 May 2022 20:30:15 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 18 May 2022 20:30:14 +0800 From: Yunfei Dong To: Yunfei Dong , Alexandre Courbot , Nicolas Dufresne , "Hans Verkuil" , AngeloGioacchino Del Regno , Benjamin Gaignard , Tiffany Lin , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger , Tomasz Figa CC: George Sun , Xiaoyong Lu , Hsin-Yi Wang , Fritz Koenig , Daniel Vetter , dri-devel , Irui Wang , "Steve Cho" , , , , , , Subject: [PATCH v7, 6/7] media: mediatek: vcodec: prevent kernel crash when scp ipi timeout Date: Wed, 18 May 2022 20:30:03 +0800 Message-ID: <20220518123004.18286-7-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220518123004.18286-1-yunfei.dong@mediatek.com> References: <20220518123004.18286-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org When SCP timeout during playing video, kernel crashes with following message. It's caused by accessing NULL pointer in vpu_dec_ipi_handler. This patch doesn't solve the root cause of NULL pointer, but merely prevent kernel crashed when encounter the NULL pointer. After applied this patch, kernel keeps alive, only the video player turns to green screen. [67242.065474] pc : vpu_dec_ipi_handler+0xa0/0xb20 [mtk_vcodec_dec] [67242.065485] [MTK_V4L2] level=0 fops_vcodec_open(),334: 18000000.vcodec_dec decoder [135] [67242.065523] lr : scp_ipi_handler+0x11c/0x244 [mtk_scp] [67242.065540] sp : ffffffbb4207fb10 [67242.065557] x29: ffffffbb4207fb30 x28: ffffffd00a1d5000 [67242.065592] x27: 1ffffffa0143aa24 x26: 0000000000000000 [67242.065625] x25: dfffffd000000000 x24: ffffffd0168bfdb0 [67242.065659] x23: 1ffffff76840ff74 x22: ffffffbb41fa8a88 [67242.065692] x21: ffffffbb4207fb9c x20: ffffffbb4207fba0 [67242.065725] x19: ffffffbb4207fb98 x18: 0000000000000000 [67242.065758] x17: 0000000000000000 x16: ffffffd042022094 [67242.065791] x15: 1ffffff77ed4b71a x14: 1ffffff77ed4b719 [67242.065824] x13: 0000000000000000 x12: 0000000000000000 [67242.065857] x11: 0000000000000000 x10: dfffffd000000001 [67242.065890] x9 : 0000000000000000 x8 : 0000000000000002 [67242.065923] x7 : 0000000000000000 x6 : 000000000000003f [67242.065956] x5 : 0000000000000040 x4 : ffffffffffffffe0 [67242.065989] x3 : ffffffd043b841b8 x2 : 0000000000000000 [67242.066021] x1 : 0000000000000010 x0 : 0000000000000010 [67242.066055] Call trace: [67242.066092] vpu_dec_ipi_handler+0xa0/0xb20 [mtk_vcodec_dec 12220d230d83a7426fc38c56b3e7bc6066955bae] [67242.066119] scp_ipi_handler+0x11c/0x244 [mtk_scp 8fb69c2ef141dd3192518b952b65aba35627b8bf] [67242.066145] mt8192_scp_irq_handler+0x70/0x128 [mtk_scp 8fb69c2ef141dd3192518b952b65aba35627b8bf] [67242.066172] scp_irq_handler+0xa0/0x114 [mtk_scp 8fb69c2ef141dd3192518b952b65aba35627b8bf] [67242.066200] irq_thread_fn+0x84/0xf8 [67242.066220] irq_thread+0x170/0x1ec [67242.066242] kthread+0x2f8/0x3b8 [67242.066264] ret_from_fork+0x10/0x30 [67242.066292] Code: 38f96908 35003628 91004340 d343fc08 (38f96908) Signed-off-by: Tinghan Shen Signed-off-by: Yunfei Dong Reviewed-by: Macpaul Lin --- drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c b/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c index 35f4d5583084..df309e8e9379 100644 --- a/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c +++ b/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c @@ -91,6 +91,11 @@ static void vpu_dec_ipi_handler(void *data, unsigned int len, void *priv) struct vdec_vpu_inst *vpu = (struct vdec_vpu_inst *) (unsigned long)msg->ap_inst_addr; + if (!vpu) { + mtk_v4l2_err("ap_inst_addr is NULL, did the SCP hang or crash?"); + return; + } + mtk_vcodec_debug(vpu, "+ id=%X", msg->msg_id); vpu->failure = msg->status;