From patchwork Wed Feb 22 10:59:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martin X-Patchwork-Id: 10017 Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1S09vK-0007NQ-0D for patchwork@linuxtv.org; Wed, 22 Feb 2012 11:59:50 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.75/mailfrontend-3) with esmtp for id 1S09vJ-0003tk-D5; Wed, 22 Feb 2012 11:59:49 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755809Ab2BVK7q (ORCPT ); Wed, 22 Feb 2012 05:59:46 -0500 Received: from mail-ww0-f44.google.com ([74.125.82.44]:52038 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754763Ab2BVK7p (ORCPT ); Wed, 22 Feb 2012 05:59:45 -0500 Received: by wgbdt10 with SMTP id dt10so6587214wgb.1 for ; Wed, 22 Feb 2012 02:59:44 -0800 (PST) Received-SPF: pass (google.com: domain of javier.martin@vista-silicon.com designates 10.180.82.39 as permitted sender) client-ip=10.180.82.39; Authentication-Results: mr.google.com; spf=pass (google.com: domain of javier.martin@vista-silicon.com designates 10.180.82.39 as permitted sender) smtp.mail=javier.martin@vista-silicon.com Received: from mr.google.com ([10.180.82.39]) by 10.180.82.39 with SMTP id f7mr33866491wiy.19.1329908384030 (num_hops = 1); Wed, 22 Feb 2012 02:59:44 -0800 (PST) MIME-Version: 1.0 Received: by 10.180.82.39 with SMTP id f7mr27994175wiy.19.1329908383967; Wed, 22 Feb 2012 02:59:43 -0800 (PST) Received: from localhost.localdomain (182.50.18.95.dynamic.jazztel.es. [95.18.50.182]) by mx.google.com with ESMTPS id df3sm15528124wib.1.2012.02.22.02.59.42 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 22 Feb 2012 02:59:43 -0800 (PST) From: Javier Martin To: linux-media@vger.kernel.org Cc: g.liakhovetski@gmx.de, s.hauer@pengutronix.de, mchehab@infradead.org, Javier Martin Subject: [PATCH v2 6/6] media: i.MX27 camera: more efficient discard buffer handling. Date: Wed, 22 Feb 2012 11:59:34 +0100 Message-Id: <1329908374-19769-2-git-send-email-javier.martin@vista-silicon.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1329908374-19769-1-git-send-email-javier.martin@vista-silicon.com> References: <1329908374-19769-1-git-send-email-javier.martin@vista-silicon.com> X-Gm-Message-State: ALoCoQlI4F0xQyz5votpT0y09cierPdxhuDZTxgEqCK3+oN3mmSjjzFGGTgc1wCTKs/hr16GpymH Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 5.6.1.2065439, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2012.2.22.105126 X-PMX-Spam: Gauge=IIIIIIII, Probability=8%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, __ANY_URI 0, __CP_MEDIA_BODY 0, __CP_URI_IN_BODY 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __MULTIPLE_RCPTS_CC_X2 0, __SANE_MSGID 0, __TO_MALFORMED_2 0, __TO_NO_NAME 0, __URI_NO_WWW 0, __URI_NS ' Some elements of 'mx2_buffer' are grouped together in another auxiliary structure. This way we don't need to have unused 'vb2_buffer' structures for both discard buffers. Signed-off-by: Javier Martin --- Changes since v1: - Adapt to [PATCH v4 4/4] media i.MX27 camera: handle overflows properly. --- drivers/media/video/mx2_camera.c | 77 ++++++++++++++++++++++---------------- 1 files changed, 45 insertions(+), 32 deletions(-) diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c index 96a10af..fcb6b3f 100644 --- a/drivers/media/video/mx2_camera.c +++ b/drivers/media/video/mx2_camera.c @@ -230,15 +230,18 @@ enum mx2_buffer_state { MX2_STATE_DONE, }; +struct mx2_buf_internal { + struct list_head queue; + int bufnum; + bool discard; +}; + /* buffer for one video frame */ struct mx2_buffer { /* common v4l buffer stuff -- must be first */ struct vb2_buffer vb; - struct list_head queue; enum mx2_buffer_state state; - - int bufnum; - bool discard; + struct mx2_buf_internal internal; }; struct mx2_camera_dev { @@ -270,7 +273,7 @@ struct mx2_camera_dev { u32 csicr1; - struct mx2_buffer buf_discard[2]; + struct mx2_buf_internal buf_discard[2]; void *discard_buffer; dma_addr_t discard_buffer_dma; size_t discard_size; @@ -279,6 +282,11 @@ struct mx2_camera_dev { struct vb2_alloc_ctx *alloc_ctx; }; +static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf) +{ + return container_of(int_buf, struct mx2_buffer, internal); +} + static struct mx2_fmt_cfg mx27_emma_prp_table[] = { /* * This is a generic configuration which is valid for most @@ -459,9 +467,9 @@ static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb, writel(0, pcdev->base_csi + fb_reg); } else { buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - queue); + internal.queue); vb = &buf->vb; - list_del(&buf->queue); + list_del(&buf->internal.queue); buf->state = MX2_STATE_ACTIVE; writel(vb2_dma_contig_plane_dma_addr(vb, 0), pcdev->base_csi + fb_reg); @@ -578,7 +586,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb) spin_lock_irqsave(&pcdev->lock, flags); buf->state = MX2_STATE_QUEUED; - list_add_tail(&buf->queue, &pcdev->capture); + list_add_tail(&buf->internal.queue, &pcdev->capture); if (cpu_is_mx25()) { u32 csicr3, dma_inten = 0; @@ -596,7 +604,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb) } if (dma_inten) { - list_del(&buf->queue); + list_del(&buf->internal.queue); buf->state = MX2_STATE_ACTIVE; csicr3 = readl(pcdev->base_csi + CSICR3); @@ -719,23 +727,23 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count) spin_lock_irqsave(&pcdev->lock, flags); buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - queue); - buf->bufnum = 0; + internal.queue); + buf->internal.bufnum = 0; vb = &buf->vb; buf->state = MX2_STATE_ACTIVE; phys = vb2_dma_contig_plane_dma_addr(vb, 0); - mx27_update_emma_buf(pcdev, phys, buf->bufnum); + mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum); list_move_tail(pcdev->capture.next, &pcdev->active_bufs); buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - queue); - buf->bufnum = 1; + internal.queue); + buf->internal.bufnum = 1; vb = &buf->vb; buf->state = MX2_STATE_ACTIVE; phys = vb2_dma_contig_plane_dma_addr(vb, 0); - mx27_update_emma_buf(pcdev, phys, buf->bufnum); + mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum); list_move_tail(pcdev->capture.next, &pcdev->active_bufs); bytesperline = soc_mbus_bytes_per_line(icd->user_width, @@ -1213,21 +1221,25 @@ static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev, #ifdef DEBUG struct mx2_fmt_cfg *prp = pcdev->emma_prp; #endif + struct mx2_buf_internal *ibuf; struct mx2_buffer *buf; struct vb2_buffer *vb; unsigned long phys; - buf = list_first_entry(&pcdev->active_bufs, struct mx2_buffer, queue); + ibuf = list_first_entry(&pcdev->active_bufs, struct mx2_buf_internal, + queue); - BUG_ON(buf->bufnum != bufnum); + BUG_ON(ibuf->bufnum != bufnum); - if (buf->discard) { + if (ibuf->discard) { /* * Discard buffer must not be returned to user space. * Just return it to the discard queue. */ list_move_tail(pcdev->active_bufs.next, &pcdev->discard); } else { + buf = mx2_ibuf_to_buf(ibuf); + vb = &buf->vb; #ifdef DEBUG phys = vb2_dma_contig_plane_dma_addr(vb, 0); @@ -1251,7 +1263,7 @@ static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); - list_del_init(&buf->queue); + list_del_init(&buf->internal.queue); do_gettimeofday(&vb->v4l2_buf.timestamp); vb->v4l2_buf.sequence = pcdev->frame_count; if (err) @@ -1269,18 +1281,19 @@ static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev, return; } - buf = list_first_entry(&pcdev->discard, struct mx2_buffer, - queue); - buf->bufnum = bufnum; + ibuf = list_first_entry(&pcdev->discard, + struct mx2_buf_internal, queue); + ibuf->bufnum = bufnum; list_move_tail(pcdev->discard.next, &pcdev->active_bufs); mx27_update_emma_buf(pcdev, pcdev->discard_buffer_dma, bufnum); return; } - buf = list_first_entry(&pcdev->capture, struct mx2_buffer, queue); + buf = list_first_entry(&pcdev->capture, struct mx2_buffer, + internal.queue); - buf->bufnum = bufnum; + buf->internal.bufnum = bufnum; list_move_tail(pcdev->capture.next, &pcdev->active_bufs); @@ -1295,7 +1308,7 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data) { struct mx2_camera_dev *pcdev = data; unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS); - struct mx2_buffer *buf; + struct mx2_buf_internal *ibuf; spin_lock(&pcdev->lock); @@ -1315,10 +1328,10 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data) pcdev->base_emma + PRP_CNTL); writel(cntl, pcdev->base_emma + PRP_CNTL); - buf = list_first_entry(pcdev->active_bufs.next, - struct mx2_buffer, queue); + ibuf = list_first_entry(&pcdev->active_bufs, + struct mx2_buf_internal, queue); mx27_camera_frame_done_emma(pcdev, - buf->bufnum, true); + ibuf->bufnum, true); status &= ~(1 << 7); } else if (((status & (3 << 5)) == (3 << 5)) || @@ -1327,10 +1340,10 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data) * Both buffers have triggered, process the one we're expecting * to first */ - buf = list_first_entry(&pcdev->active_bufs, struct mx2_buffer, - queue); - mx27_camera_frame_done_emma(pcdev, buf->bufnum, false); - status &= ~(1 << (6 - buf->bufnum)); /* mark processed */ + ibuf = list_first_entry(&pcdev->active_bufs, + struct mx2_buf_internal, queue); + mx27_camera_frame_done_emma(pcdev, ibuf->bufnum, false); + status &= ~(1 << (6 - ibuf->bufnum)); /* mark processed */ } else if ((status & (1 << 6)) || (status & (1 << 4))) { mx27_camera_frame_done_emma(pcdev, 0, false); } else if ((status & (1 << 5)) || (status & (1 << 3))) {