From patchwork Tue Jun 4 06:00:13 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Libin Yang X-Patchwork-Id: 2657101 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id DA6CADFF68 for ; Tue, 4 Jun 2013 06:01:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758801Ab3FDGBZ (ORCPT ); Tue, 4 Jun 2013 02:01:25 -0400 Received: from na3sys009aog114.obsmtp.com ([74.125.149.211]:44508 "EHLO na3sys009aog114.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751498Ab3FDGA5 (ORCPT ); Tue, 4 Jun 2013 02:00:57 -0400 Received: from SC-OWA01.marvell.com ([199.233.58.136]) (using TLSv1) by na3sys009aob114.postini.com ([74.125.148.12]) with SMTP ID DSNKUa2ClbVXLMgpJHWq6+I26M2sSjTH9Rhl@postini.com; Mon, 03 Jun 2013 23:00:56 PDT Received: from [10.38.36.180] (10.38.36.180) by sc-owa01.marvell.com (10.93.76.21) with Microsoft SMTP Server (TLS) id 8.3.213.0; Mon, 3 Jun 2013 23:00:14 -0700 Message-ID: <1370325613.26072.34.camel@younglee-desktop> Subject: [PATCH 6/7] marvell-ccic: add SOF / EOF pair check for marvell-ccic driver From: lbyang Reply-To: To: , , CC: , , Date: Tue, 4 Jun 2013 14:00:13 +0800 X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Libin Yang This patch adds the SOFx/EOFx pair check for marvell-ccic. When switching format, the last EOF may not arrive when stop streamning. And the EOF will be detected in the next start streaming. Must ensure clear the left over frame flags before every really start streaming. Signed-off-by: Albert Wang Signed-off-by: Libin Yang Acked-by: Jonathan Corbet Acked-by: Guennadi Liakhovetski --- drivers/media/platform/marvell-ccic/mcam-core.c | 30 ++++++++++++++++++++--- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c index 546f096..bd200c0 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -95,6 +95,9 @@ MODULE_PARM_DESC(buffer_mode, #define CF_CONFIG_NEEDED 4 /* Must configure hardware */ #define CF_SINGLE_BUFFER 5 /* Running with a single buffer */ #define CF_SG_RESTART 6 /* SG restart needed */ +#define CF_FRAME_SOF0 7 /* Frame 0 started */ +#define CF_FRAME_SOF1 8 +#define CF_FRAME_SOF2 9 #define sensor_call(cam, o, f, args...) \ v4l2_subdev_call(cam->sensor, o, f, ##args) @@ -261,8 +264,10 @@ static void mcam_reset_buffers(struct mcam_camera *cam) int i; cam->next_buf = -1; - for (i = 0; i < cam->nbufs; i++) + for (i = 0; i < cam->nbufs; i++) { clear_bit(i, &cam->flags); + clear_bit(CF_FRAME_SOF0 + i, &cam->flags); + } } static inline int mcam_needs_config(struct mcam_camera *cam) @@ -1137,6 +1142,7 @@ static void mcam_vb_wait_finish(struct vb2_queue *vq) static int mcam_vb_start_streaming(struct vb2_queue *vq, unsigned int count) { struct mcam_camera *cam = vb2_get_drv_priv(vq); + unsigned int frame; if (cam->state != S_IDLE) { INIT_LIST_HEAD(&cam->buffers); @@ -1154,6 +1160,14 @@ static int mcam_vb_start_streaming(struct vb2_queue *vq, unsigned int count) cam->state = S_BUFWAIT; return 0; } + + /* + * Ensure clear the left over frame flags + * before every really start streaming + */ + for (frame = 0; frame < cam->nbufs; frame++) + clear_bit(CF_FRAME_SOF0 + frame, &cam->flags); + return mcam_read_setup(cam); } @@ -1842,9 +1856,11 @@ int mccic_irq(struct mcam_camera *cam, unsigned int irqs) * each time. */ for (frame = 0; frame < cam->nbufs; frame++) - if (irqs & (IRQ_EOF0 << frame)) { + if (irqs & (IRQ_EOF0 << frame) && + test_bit(CF_FRAME_SOF0 + frame, &cam->flags)) { mcam_frame_complete(cam, frame); handled = 1; + clear_bit(CF_FRAME_SOF0 + frame, &cam->flags); if (cam->buffer_mode == B_DMA_sg) break; } @@ -1853,9 +1869,15 @@ int mccic_irq(struct mcam_camera *cam, unsigned int irqs) * code assumes that we won't get multiple frame interrupts * at once; may want to rethink that. */ - if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2)) { + for (frame = 0; frame < cam->nbufs; frame++) { + if (irqs & (IRQ_SOF0 << frame)) { + set_bit(CF_FRAME_SOF0 + frame, &cam->flags); + handled = IRQ_HANDLED; + } + } + + if (handled == IRQ_HANDLED) { set_bit(CF_DMA_ACTIVE, &cam->flags); - handled = 1; if (cam->buffer_mode == B_DMA_sg) mcam_ctlr_stop(cam); }