From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932451AbcHHTjD (ORCPT ); Mon, 8 Aug 2016 15:39:03 -0400 Received: from smtp06.smtpout.orange.fr ([80.12.242.128]:41924 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932358AbcHHTjA (ORCPT ); Mon, 8 Aug 2016 15:39:00 -0400 X-ME-Helo: belgarion.home X-ME-Date: Mon, 08 Aug 2016 21:31:28 +0200 X-ME-IP: 109.220.218.149 From: Robert Jarzmik To: Mauro Carvalho Chehab , Guennadi Liakhovetski , Jiri Kosina , Hans Verkuil Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Robert Jarzmik Subject: [PATCH v3 13/14] media: platform: pxa_camera: change stop_streaming semantics Date: Mon, 8 Aug 2016 21:30:51 +0200 Message-Id: <1470684652-16295-14-git-send-email-robert.jarzmik@free.fr> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1470684652-16295-1-git-send-email-robert.jarzmik@free.fr> References: <1470684652-16295-1-git-send-email-robert.jarzmik@free.fr> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of the legacy behavior where it was required to wait for all video buffers to be finished by the hardware, use a cancel like strategy : as soon as the stop_streaming() call is done, abort all DMA transfers, report the already buffers as failed and return. This makes stop_streaming() more a "cancel capture" than a "wait for end of capture" semantic. Signed-off-by: Robert Jarzmik --- drivers/media/platform/soc_camera/pxa_camera.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/soc_camera/pxa_camera.c b/drivers/media/platform/soc_camera/pxa_camera.c index 20340489e07e..a161b64d420d 100644 --- a/drivers/media/platform/soc_camera/pxa_camera.c +++ b/drivers/media/platform/soc_camera/pxa_camera.c @@ -526,7 +526,8 @@ static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev) } static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, - struct pxa_buffer *buf) + struct pxa_buffer *buf, + enum vb2_buffer_state state) { struct vb2_buffer *vb = &buf->vbuf.vb2_buf; struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); @@ -648,7 +649,7 @@ static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev, } buf->active_dma &= ~act_dma; if (!buf->active_dma) { - pxa_camera_wakeup(pcdev, buf); + pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_DONE); pxa_camera_check_link_miss(pcdev, last_buf->cookie[chan], last_issued); } @@ -1090,7 +1091,15 @@ static int pxac_vb2_start_streaming(struct vb2_queue *vq, unsigned int count) static void pxac_vb2_stop_streaming(struct vb2_queue *vq) { - vb2_wait_for_all_buffers(vq); + struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq); + struct pxa_buffer *buf, *tmp; + + dev_dbg(pcdev_to_dev(pcdev), "%s active=%p\n", + __func__, pcdev->active); + pxa_camera_stop_capture(pcdev); + + list_for_each_entry_safe(buf, tmp, &pcdev->capture, queue) + pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_ERROR); } static struct vb2_ops pxac_vb2_ops = { -- 2.1.4