From patchwork Mon Feb 8 11:44:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 8248451 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Original-To: patchwork-linux-renesas-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1E4979F3CD for ; Mon, 8 Feb 2016 11:44:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4AB67203B0 for ; Mon, 8 Feb 2016 11:44:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DBC2203B7 for ; Mon, 8 Feb 2016 11:44:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753271AbcBHLoX (ORCPT ); Mon, 8 Feb 2016 06:44:23 -0500 Received: from galahad.ideasonboard.com ([185.26.127.97]:48305 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752507AbcBHLoV (ORCPT ); Mon, 8 Feb 2016 06:44:21 -0500 Received: from avalon.bb.dnainternet.fi (85-23-193-79.bb.dnainternet.fi [85.23.193.79]) by galahad.ideasonboard.com (Postfix) with ESMTPSA id 2406E21897; Mon, 8 Feb 2016 12:42:26 +0100 (CET) From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org Subject: [PATCH v3 33/35] v4l: vsp1: Implement atomic update for the DRM driver Date: Mon, 8 Feb 2016 13:44:03 +0200 Message-Id: <1454931845-23864-34-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.4.10 In-Reply-To: <1454931845-23864-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> References: <1454931845-23864-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add two API functions named vsp1_du_atomic_begin() and vsp1_du_atomic_flush() to signal the start and end of an atomic update. The vsp1_du_setup_rpf() function is renamed to vsp1_du_atomic_update() for consistency. With this new API, the driver will reprogram all modified inputs atomically before restarting the video stream. Signed-off-by: Laurent Pinchart --- drivers/media/platform/vsp1/vsp1_drm.c | 70 +++++++++++++++++++++++++--------- drivers/media/platform/vsp1/vsp1_drm.h | 7 ++++ include/media/vsp1.h | 9 +++-- 3 files changed, 66 insertions(+), 20 deletions(-) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index a918bb4ab46c..8c76086caa67 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -254,7 +254,26 @@ int vsp1_du_setup_lif(struct device *dev, unsigned int width, EXPORT_SYMBOL_GPL(vsp1_du_setup_lif); /** - * vsp1_du_setup_rpf - Setup one RPF input of the VSP pipeline + * vsp1_du_atomic_begin - Prepare for an atomic update + * @dev: the VSP device + */ +void vsp1_du_atomic_begin(struct device *dev) +{ + struct vsp1_device *vsp1 = dev_get_drvdata(dev); + struct vsp1_pipeline *pipe = &vsp1->drm->pipe; + unsigned long flags; + + spin_lock_irqsave(&pipe->irqlock, flags); + + vsp1->drm->num_inputs = pipe->num_inputs; + vsp1->drm->update = false; + + spin_unlock_irqrestore(&pipe->irqlock, flags); +} +EXPORT_SYMBOL_GPL(vsp1_du_atomic_begin); + +/** + * vsp1_du_atomic_update - Setup one RPF input of the VSP pipeline * @dev: the VSP device * @rpf_index: index of the RPF to setup (0-based) * @pixelformat: V4L2 pixel format for the RPF memory input @@ -288,10 +307,10 @@ EXPORT_SYMBOL_GPL(vsp1_du_setup_lif); * * Return 0 on success or a negative error code on failure. */ -int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf_index, - u32 pixelformat, unsigned int pitch, - dma_addr_t mem[2], const struct v4l2_rect *src, - const struct v4l2_rect *dst) +int vsp1_du_atomic_update(struct device *dev, unsigned int rpf_index, + u32 pixelformat, unsigned int pitch, + dma_addr_t mem[2], const struct v4l2_rect *src, + const struct v4l2_rect *dst) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); struct vsp1_pipeline *pipe = &vsp1->drm->pipe; @@ -301,7 +320,6 @@ int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf_index, struct vsp1_rwpf_memory memory; struct vsp1_rwpf *rpf; unsigned long flags; - bool start_stop = false; int ret; if (rpf_index >= vsp1->pdata.rpf_count) @@ -322,16 +340,11 @@ int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf_index, vsp1->bru->inputs[rpf_index].rpf = NULL; pipe->inputs[rpf_index] = NULL; - vsp1->drm->update = true; - start_stop = --pipe->num_inputs == 0; + pipe->num_inputs--; } spin_unlock_irqrestore(&pipe->irqlock, flags); - /* Stop the pipeline if we're the last user. */ - if (start_stop) - vsp1_pipeline_stop(pipe); - return 0; } @@ -459,19 +472,42 @@ int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf_index, if (!pipe->inputs[rpf->entity.index]) { vsp1->bru->inputs[rpf_index].rpf = rpf; pipe->inputs[rpf->entity.index] = rpf; - start_stop = pipe->num_inputs++ == 0; + pipe->num_inputs++; } - /* Start the pipeline if it's currently stopped. */ + spin_unlock_irqrestore(&pipe->irqlock, flags); + + return 0; +} +EXPORT_SYMBOL_GPL(vsp1_du_atomic_update); + +/** + * vsp1_du_atomic_flush - Commit an atomic update + * @dev: the VSP device + */ +void vsp1_du_atomic_flush(struct device *dev) +{ + struct vsp1_device *vsp1 = dev_get_drvdata(dev); + struct vsp1_pipeline *pipe = &vsp1->drm->pipe; + unsigned long flags; + bool stop = false; + + spin_lock_irqsave(&pipe->irqlock, flags); + vsp1->drm->update = true; - if (start_stop) + + /* Start or stop the pipeline if needed. */ + if (!vsp1->drm->num_inputs && pipe->num_inputs) vsp1_drm_pipeline_run(pipe); + else if (vsp1->drm->num_inputs && !pipe->num_inputs) + stop = true; spin_unlock_irqrestore(&pipe->irqlock, flags); - return 0; + if (stop) + vsp1_pipeline_stop(pipe); } -EXPORT_SYMBOL_GPL(vsp1_du_setup_rpf); +EXPORT_SYMBOL_GPL(vsp1_du_atomic_flush); /* ----------------------------------------------------------------------------- * Initialization diff --git a/drivers/media/platform/vsp1/vsp1_drm.h b/drivers/media/platform/vsp1/vsp1_drm.h index 2ad320ab1e45..25d7f017feb4 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.h +++ b/drivers/media/platform/vsp1/vsp1_drm.h @@ -15,8 +15,15 @@ #include "vsp1_pipe.h" +/** + * vsp1_drm - State for the API exposed to the DRM driver + * @pipe: the VSP1 pipeline used for display + * @num_inputs: number of active pipeline inputs at the beginning of an update + * @update: the pipeline configuration has been updated + */ struct vsp1_drm { struct vsp1_pipeline pipe; + unsigned int num_inputs; bool update; }; diff --git a/include/media/vsp1.h b/include/media/vsp1.h index 2c1aea7066be..cc541753896f 100644 --- a/include/media/vsp1.h +++ b/include/media/vsp1.h @@ -23,8 +23,11 @@ int vsp1_du_init(struct device *dev); int vsp1_du_setup_lif(struct device *dev, unsigned int width, unsigned int height); -int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf, u32 pixelformat, - unsigned int pitch, dma_addr_t mem[2], - const struct v4l2_rect *src, const struct v4l2_rect *dst); +int vsp1_du_atomic_begin(struct device *dev); +int vsp1_du_atomic_update(struct device *dev, unsigned int rpf, u32 pixelformat, + unsigned int pitch, dma_addr_t mem[2], + const struct v4l2_rect *src, + const struct v4l2_rect *dst); +int vsp1_du_atomic_flush(struct device *dev); #endif /* __MEDIA_VSP1_H__ */