From patchwork Thu Apr 21 14:34:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 564673 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 674F3C4332F for ; Thu, 21 Apr 2022 14:35:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232211AbiDUOiB (ORCPT ); Thu, 21 Apr 2022 10:38:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1389477AbiDUOhy (ORCPT ); Thu, 21 Apr 2022 10:37:54 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E2021160 for ; Thu, 21 Apr 2022 07:35:04 -0700 (PDT) Received: from deskari.lan (91-156-85-209.elisa-laajakaista.fi [91.156.85.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id EB91D596; Thu, 21 Apr 2022 16:35:00 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1650551701; bh=kjSvASw4zprC5DZZwbbShLq1bcs0Emx5QSilqnCXyeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UETUyVsP3vNj9QknbuREqhJKzrSAYIxsiv5RSByXgWULlV+EaWUm3QYzfek8gKZIB vjaTJvYd1PeQd7ppXYHhzZGThGZ5TUZZHarzaM2S8zrq6TcqVkUTlc6OfYKV5/dxA8 UacC3LFGx+TgE3MrwLNRA274pE7MthaonQFSWeTE= From: Tomi Valkeinen To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com, Jacopo Mondi , Laurent Pinchart , niklas.soderlund+renesas@ragnatech.se, Mauro Carvalho Chehab , Hans Verkuil , Pratyush Yadav Cc: Tomi Valkeinen Subject: [PATCH 3/6] media: ti: cal: rename sd_state to state Date: Thu, 21 Apr 2022 17:34:46 +0300 Message-Id: <20220421143449.552312-4-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220421143449.552312-1-tomi.valkeinen@ideasonboard.com> References: <20220421143449.552312-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- drivers/media/platform/ti/cal/cal-camerarx.c | 30 ++++++++++---------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/media/platform/ti/cal/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c index a41941fa819a..34b8542133b6 100644 --- a/drivers/media/platform/ti/cal/cal-camerarx.c +++ b/drivers/media/platform/ti/cal/cal-camerarx.c @@ -595,12 +595,12 @@ static inline struct cal_camerarx *to_cal_camerarx(struct v4l2_subdev *sd) static struct v4l2_mbus_framefmt * cal_camerarx_get_pad_format(struct cal_camerarx *phy, - struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_state *state, unsigned int pad, u32 which) { switch (which) { case V4L2_SUBDEV_FORMAT_TRY: - return v4l2_subdev_get_try_format(&phy->subdev, sd_state, pad); + return v4l2_subdev_get_try_format(&phy->subdev, state, pad); case V4L2_SUBDEV_FORMAT_ACTIVE: return &phy->formats[pad]; default: @@ -626,7 +626,7 @@ static int cal_camerarx_sd_s_stream(struct v4l2_subdev *sd, int enable) } static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_state *state, struct v4l2_subdev_mbus_code_enum *code) { struct cal_camerarx *phy = to_cal_camerarx(sd); @@ -643,7 +643,7 @@ static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd, goto out; } - fmt = cal_camerarx_get_pad_format(phy, sd_state, + fmt = cal_camerarx_get_pad_format(phy, state, CAL_CAMERARX_PAD_SINK, code->which); code->code = fmt->code; @@ -663,7 +663,7 @@ static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd, } static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_state *state, struct v4l2_subdev_frame_size_enum *fse) { struct cal_camerarx *phy = to_cal_camerarx(sd); @@ -679,7 +679,7 @@ static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd, if (cal_rx_pad_is_source(fse->pad)) { struct v4l2_mbus_framefmt *fmt; - fmt = cal_camerarx_get_pad_format(phy, sd_state, + fmt = cal_camerarx_get_pad_format(phy, state, CAL_CAMERARX_PAD_SINK, fse->which); if (fse->code != fmt->code) { @@ -711,7 +711,7 @@ static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd, } static int cal_camerarx_sd_get_fmt(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { struct cal_camerarx *phy = to_cal_camerarx(sd); @@ -719,7 +719,7 @@ static int cal_camerarx_sd_get_fmt(struct v4l2_subdev *sd, mutex_lock(&phy->mutex); - fmt = cal_camerarx_get_pad_format(phy, sd_state, format->pad, + fmt = cal_camerarx_get_pad_format(phy, state, format->pad, format->which); format->format = *fmt; @@ -729,7 +729,7 @@ static int cal_camerarx_sd_get_fmt(struct v4l2_subdev *sd, } static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { struct cal_camerarx *phy = to_cal_camerarx(sd); @@ -739,7 +739,7 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, /* No transcoding, source and sink formats must match. */ if (cal_rx_pad_is_source(format->pad)) - return cal_camerarx_sd_get_fmt(sd, sd_state, format); + return cal_camerarx_sd_get_fmt(sd, state, format); /* * Default to the first format if the requested media bus code isn't @@ -765,12 +765,12 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, mutex_lock(&phy->mutex); - fmt = cal_camerarx_get_pad_format(phy, sd_state, + fmt = cal_camerarx_get_pad_format(phy, state, CAL_CAMERARX_PAD_SINK, format->which); *fmt = format->format; - fmt = cal_camerarx_get_pad_format(phy, sd_state, + fmt = cal_camerarx_get_pad_format(phy, state, CAL_CAMERARX_PAD_FIRST_SOURCE, format->which); *fmt = format->format; @@ -781,10 +781,10 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, } static int cal_camerarx_sd_init_cfg(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state) + struct v4l2_subdev_state *state) { struct v4l2_subdev_format format = { - .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY + .which = state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE, .pad = CAL_CAMERARX_PAD_SINK, .format = { @@ -799,7 +799,7 @@ static int cal_camerarx_sd_init_cfg(struct v4l2_subdev *sd, }, }; - return cal_camerarx_sd_set_fmt(sd, sd_state, &format); + return cal_camerarx_sd_set_fmt(sd, state, &format); } static const struct v4l2_subdev_video_ops cal_camerarx_video_ops = { From patchwork Thu Apr 21 14:34:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 564674 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 95EFAC433EF for ; Thu, 21 Apr 2022 14:35:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389394AbiDUOh7 (ORCPT ); Thu, 21 Apr 2022 10:37:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1389500AbiDUOh5 (ORCPT ); Thu, 21 Apr 2022 10:37:57 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D6F25FA1 for ; Thu, 21 Apr 2022 07:35:07 -0700 (PDT) Received: from deskari.lan (91-156-85-209.elisa-laajakaista.fi [91.156.85.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 999DD8E6; Thu, 21 Apr 2022 16:35:02 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1650551703; bh=F7clPYedaCxFMb1jG7GPMYn+ylDt167SU3/HPUzUzvI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R3AABhwqwjWa93BPjbKZPLqiU+/zxfCG6deqejwPhycWLLCJmSdxuq4nvB/vFY5OE Abm4LCwTz+YCnbjQb9JfTIGldSzfsDmVL+pJGo8o2PusEDJH/i0lByrxLpnU8OxK9H oCPI01KnV1xJS73VihBieta4UMRyPdsryDXw8hYE= From: Tomi Valkeinen To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com, Jacopo Mondi , Laurent Pinchart , niklas.soderlund+renesas@ragnatech.se, Mauro Carvalho Chehab , Hans Verkuil , Pratyush Yadav Cc: Tomi Valkeinen Subject: [PATCH 5/6] media: ti: cal: combine wdma irq handling Date: Thu, 21 Apr 2022 17:34:48 +0300 Message-Id: <20220421143449.552312-6-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220421143449.552312-1-tomi.valkeinen@ideasonboard.com> References: <20220421143449.552312-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Instead of handling the WDMA START and END interrupts separately, we need to handle both at the same time to better manage the inherent race conditions related to CAL interrupts. Change the code so that we have a single function, cal_irq_handle_wdma(), which gets two booleans, start and end, as parameters, which allows us to manage the race conditions in the following patch. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- drivers/media/platform/ti/cal/cal.c | 59 ++++++++++++----------------- 1 file changed, 25 insertions(+), 34 deletions(-) diff --git a/drivers/media/platform/ti/cal/cal.c b/drivers/media/platform/ti/cal/cal.c index 783ce5a8cd79..e4355f266c58 100644 --- a/drivers/media/platform/ti/cal/cal.c +++ b/drivers/media/platform/ti/cal/cal.c @@ -668,22 +668,33 @@ static inline void cal_irq_wdma_end(struct cal_ctx *ctx) } } +static void cal_irq_handle_wdma(struct cal_ctx *ctx, bool start, bool end) +{ + if (end) + cal_irq_wdma_end(ctx); + + if (start) + cal_irq_wdma_start(ctx); +} + static irqreturn_t cal_irq(int irq_cal, void *data) { struct cal_dev *cal = data; - u32 status; - - status = cal_read(cal, CAL_HL_IRQSTATUS(0)); - if (status) { - unsigned int i; + u32 status[3]; + unsigned int i; - cal_write(cal, CAL_HL_IRQSTATUS(0), status); + for (i = 0; i < 3; ++i) { + status[i] = cal_read(cal, CAL_HL_IRQSTATUS(i)); + if (status[i]) + cal_write(cal, CAL_HL_IRQSTATUS(i), status[i]); + } - if (status & CAL_HL_IRQ_OCPO_ERR_MASK) + if (status[0]) { + if (status[0] & CAL_HL_IRQ_OCPO_ERR_MASK) dev_err_ratelimited(cal->dev, "OCPO ERROR\n"); for (i = 0; i < cal->data->num_csi2_phy; ++i) { - if (status & CAL_HL_IRQ_CIO_MASK(i)) { + if (status[0] & CAL_HL_IRQ_CIO_MASK(i)) { u32 cio_stat = cal_read(cal, CAL_CSI2_COMPLEXIO_IRQSTATUS(i)); @@ -694,7 +705,7 @@ static irqreturn_t cal_irq(int irq_cal, void *data) cio_stat); } - if (status & CAL_HL_IRQ_VC_MASK(i)) { + if (status[0] & CAL_HL_IRQ_VC_MASK(i)) { u32 vc_stat = cal_read(cal, CAL_CSI2_VC_IRQSTATUS(i)); dev_err_ratelimited(cal->dev, @@ -706,32 +717,12 @@ static irqreturn_t cal_irq(int irq_cal, void *data) } } - /* Check which DMA just finished */ - status = cal_read(cal, CAL_HL_IRQSTATUS(1)); - if (status) { - unsigned int i; - - /* Clear Interrupt status */ - cal_write(cal, CAL_HL_IRQSTATUS(1), status); - - for (i = 0; i < cal->num_contexts; ++i) { - if (status & CAL_HL_IRQ_WDMA_END_MASK(i)) - cal_irq_wdma_end(cal->ctx[i]); - } - } - - /* Check which DMA just started */ - status = cal_read(cal, CAL_HL_IRQSTATUS(2)); - if (status) { - unsigned int i; - - /* Clear Interrupt status */ - cal_write(cal, CAL_HL_IRQSTATUS(2), status); + for (i = 0; i < cal->num_contexts; ++i) { + bool end = !!(status[1] & CAL_HL_IRQ_WDMA_END_MASK(i)); + bool start = !!(status[2] & CAL_HL_IRQ_WDMA_START_MASK(i)); - for (i = 0; i < cal->num_contexts; ++i) { - if (status & CAL_HL_IRQ_WDMA_START_MASK(i)) - cal_irq_wdma_start(cal->ctx[i]); - } + if (start || end) + cal_irq_handle_wdma(cal->ctx[i], start, end); } return IRQ_HANDLED; From patchwork Thu Apr 21 14:34:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 564671 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 71503C433FE for ; Thu, 21 Apr 2022 14:35:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389418AbiDUOiF (ORCPT ); Thu, 21 Apr 2022 10:38:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1389505AbiDUOh6 (ORCPT ); Thu, 21 Apr 2022 10:37:58 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6DB1D2197 for ; Thu, 21 Apr 2022 07:35:08 -0700 (PDT) Received: from deskari.lan (91-156-85-209.elisa-laajakaista.fi [91.156.85.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 6F175492; Thu, 21 Apr 2022 16:35:03 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1650551704; bh=iWfMFpq2rZDj4cb4x7bR8yKDVCM80TcX5tkvI6XufXo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Nyagb0NQrGdIgyZ0PaLoGZJa1oKkONQ7uqjP2fEf5uMbIF8Ja/hGl3xR8/ddiOOp4 8h1EmuxJLv44E7un5q+FurdfEdi03ldua0Z+zZYLu8K/GtZHRGdr6OJhkvauuHLzpF Fe7JLEWAPpWw9esJxOV5K5V68Efjy3SZv1loi6Hc= From: Tomi Valkeinen To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com, Jacopo Mondi , Laurent Pinchart , niklas.soderlund+renesas@ragnatech.se, Mauro Carvalho Chehab , Hans Verkuil , Pratyush Yadav Cc: Tomi Valkeinen Subject: [PATCH 6/6] media: ti: cal: fix wdma irq for metadata Date: Thu, 21 Apr 2022 17:34:49 +0300 Message-Id: <20220421143449.552312-7-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220421143449.552312-1-tomi.valkeinen@ideasonboard.com> References: <20220421143449.552312-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org CAL HW interrupts are inherently racy. If we get both start and end interrupts, we don't know what has happened: did the DMA for a single frame start and end, or did one frame end and a new frame start? Usually for normal pixel frames we get the interrupts separately. If we do get both, we have to guess. The assumption in the code is that the active vertical area is larger than the blanking vertical area, and thus it is more likely that we get the end of the old frame and the start of a new frame. However, for embedded data, which is only a few lines high, we always get both interrupts. Here the assumption is that we get both for the same frame. Signed-off-by: Tomi Valkeinen --- drivers/media/platform/ti/cal/cal.c | 33 ++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) diff --git a/drivers/media/platform/ti/cal/cal.c b/drivers/media/platform/ti/cal/cal.c index e4355f266c58..12de9171e353 100644 --- a/drivers/media/platform/ti/cal/cal.c +++ b/drivers/media/platform/ti/cal/cal.c @@ -670,11 +670,34 @@ static inline void cal_irq_wdma_end(struct cal_ctx *ctx) static void cal_irq_handle_wdma(struct cal_ctx *ctx, bool start, bool end) { - if (end) - cal_irq_wdma_end(ctx); - - if (start) - cal_irq_wdma_start(ctx); + /* + * CAL HW interrupts are inherently racy. If we get both start and end + * interrupts, we don't know what has happened: did the DMA for a single + * frame start and end, or did one frame end and a new frame start? + * + * Usually for normal pixel frames we get the interrupts separately. If + * we do get both, we have to guess. The assumption in the code below is + * that the active vertical area is larger than the blanking vertical + * area, and thus it is more likely that we get the end of the old frame + * and the start of a new frame. + * + * However, for embedded data, which is only a few lines high, we always + * get both interrupts. Here the assumption is that we get both for the + * same frame. + */ + if (ctx->v_fmt.fmt.pix.height < 10) { + if (start) + cal_irq_wdma_start(ctx); + + if (end) + cal_irq_wdma_end(ctx); + } else { + if (end) + cal_irq_wdma_end(ctx); + + if (start) + cal_irq_wdma_start(ctx); + } } static irqreturn_t cal_irq(int irq_cal, void *data)