From patchwork Thu Feb 28 18:02:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 10833549 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EC3241575 for ; Thu, 28 Feb 2019 18:02:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D76AF2EC61 for ; Thu, 28 Feb 2019 18:02:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C890F2F3ED; Thu, 28 Feb 2019 18:02:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 377BE2EC61 for ; Thu, 28 Feb 2019 18:02:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731904AbfB1SCk (ORCPT ); Thu, 28 Feb 2019 13:02:40 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:39582 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727499AbfB1SCk (ORCPT ); Thu, 28 Feb 2019 13:02:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Sender:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=BHHrEQZI+5S4/LwUdO/s8e2FpWWYq4AOxIetfF7icw0=; b=YAiurNRl/ZZTDyNNIZxV3hVMb gotmQFfugrNu6f30jd78+GCfcsVLyG1GK2aPj1GSMoLxBsQpi8UvvoIvkgio86YCbcH32+9fa+Y9p La8AXrxv5w07st3/Xcq37Ben5ypICJGLrqu9LA4CeFMhFSt/moH+rrrL5g8zB8iNgHovT92MuFw7A AzhskkC1EWbVT3KCcCvRTEQ0e0rZvb+jPoBKxaQ/VUFONYyl62d8csSP8NlpcHg17LRWOXjh3XD3K F7MoKxWZVmptDoxJIJISjALjQQkNb8Z/PrQOsYWgCsLvIoKiSUJITeROJvmDIitOX9OJ8wILmUCL1 lCWoM6rwg==; Received: from 177.41.113.159.dynamic.adsl.gvt.net.br ([177.41.113.159] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gzQ12-0001fq-80; Thu, 28 Feb 2019 18:02:40 +0000 Received: from mchehab by bombadil.infradead.org with local (Exim 4.92) (envelope-from ) id 1gzQ10-0005Xa-5i; Thu, 28 Feb 2019 15:02:38 -0300 From: Mauro Carvalho Chehab To: Linux Media Mailing List Cc: Mauro Carvalho Chehab , Mauro Carvalho Chehab , Hans Verkuil , Ezequiel Garcia Subject: [PATCH v4] media: vim2m: better handle cap/out buffers with different sizes Date: Thu, 28 Feb 2019 15:02:36 -0300 Message-Id: X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The vim2m driver doesn't enforce that the capture and output buffers would have the same size. Do the right thing if the buffers are different, zeroing the buffer before writing, ensuring that lines will be aligned and it won't write past the buffer area. This is a temporary fix. A proper fix is to either implement a simple scaler at vim2m, or to better define the behaviour of M2M transform drivers at V4L2 API with regards to its capability of scaling the image or not. In any case, such changes would deserve a separate patch anyway, as it would imply on some behavoral change. Also, as we have an actual bug of writing data at wrong places, let's fix this here, and add a mental note that we need to properly address it. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/vim2m.c | 117 +++++++++++++++++++++++---------- 1 file changed, 81 insertions(+), 36 deletions(-) diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c index 5157a59aeb58..ec177de144b6 100644 --- a/drivers/media/platform/vim2m.c +++ b/drivers/media/platform/vim2m.c @@ -267,46 +267,66 @@ static const char *type_name(enum v4l2_buf_type type) #define CLIP(__color) \ (u8)(((__color) > 0xff) ? 0xff : (((__color) < 0) ? 0 : (__color))) -static void copy_two_pixels(struct vim2m_fmt *in, struct vim2m_fmt *out, +static int fast_copy_two_pixels(struct vim2m_q_data *q_data_in, + struct vim2m_q_data *q_data_out, + u8 **src, u8 **dst, int ypos, bool reverse) +{ + int depth = q_data_out->fmt->depth >> 3; + + /* Only do fast copy when format and resolution are identical */ + if (q_data_in->fmt->fourcc != q_data_out->fmt->fourcc || + q_data_in->width != q_data_out->width || + q_data_in->height != q_data_out->height) + return 0; + + if (!reverse) { + memcpy(*dst, *src, depth << 1); + *src += depth << 1; + *dst += depth << 1; + return 1; + } + + /* Copy line at reverse order - YUYV format */ + if (q_data_in->fmt->fourcc == V4L2_PIX_FMT_YUYV) { + int u, v, y, y1; + + *src -= 2; + + y1 = (*src)[0]; /* copy as second point */ + u = (*src)[1]; + y = (*src)[2]; /* copy as first point */ + v = (*src)[3]; + + *src -= 2; + + *(*dst)++ = y; + *(*dst)++ = u; + *(*dst)++ = y1; + *(*dst)++ = v; + return 1; + } + + /* copy RGB formats in reverse order */ + memcpy(*dst, *src, depth); + memcpy(*dst + depth, *src - depth, depth); + *src -= depth << 1; + *dst += depth << 1; + return 1; +} + +static void copy_two_pixels(struct vim2m_q_data *q_data_in, + struct vim2m_q_data *q_data_out, u8 **src, u8 **dst, int ypos, bool reverse) { + struct vim2m_fmt *out = q_data_out->fmt; + struct vim2m_fmt *in = q_data_in->fmt; u8 _r[2], _g[2], _b[2], *r, *g, *b; int i, step; // If format is the same just copy the data, respecting the width - if (in->fourcc == out->fourcc) { - int depth = out->depth >> 3; - - if (reverse) { - if (in->fourcc == V4L2_PIX_FMT_YUYV) { - int u, v, y, y1; - - *src -= 2; - - y1 = (*src)[0]; /* copy as second point */ - u = (*src)[1]; - y = (*src)[2]; /* copy as first point */ - v = (*src)[3]; - - *src -= 2; - - *(*dst)++ = y; - *(*dst)++ = u; - *(*dst)++ = y1; - *(*dst)++ = v; - return; - } - - memcpy(*dst, *src, depth); - memcpy(*dst + depth, *src - depth, depth); - *src -= depth << 1; - } else { - memcpy(*dst, *src, depth << 1); - *src += depth << 1; - } - *dst += depth << 1; - return; - } + if (fast_copy_two_pixels(q_data_in, q_data_out, + src, dst, ypos, reverse)) + return; /* Step 1: read two consecutive pixels from src pointer */ @@ -506,7 +526,9 @@ static int device_process(struct vim2m_ctx *ctx, struct vim2m_dev *dev = ctx->dev; struct vim2m_q_data *q_data_in, *q_data_out; u8 *p_in, *p, *p_out; - int width, height, bytesperline, x, y, y_out, start, end, step; + unsigned int width, height, bytesperline, bytesperline_out; + unsigned int x, y, y_out; + int start, end, step; struct vim2m_fmt *in, *out; q_data_in = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); @@ -516,8 +538,15 @@ static int device_process(struct vim2m_ctx *ctx, bytesperline = (q_data_in->width * q_data_in->fmt->depth) >> 3; q_data_out = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); + bytesperline_out = (q_data_out->width * q_data_out->fmt->depth) >> 3; out = q_data_out->fmt; + /* Crop to the limits of the destination image */ + if (width > q_data_out->width) + width = q_data_out->width; + if (height > q_data_out->height) + height = q_data_out->height; + p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0); p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0); if (!p_in || !p_out) { @@ -526,6 +555,17 @@ static int device_process(struct vim2m_ctx *ctx, return -EFAULT; } + /* + * FIXME: instead of cropping the image and zeroing any + * extra data, the proper behavior is to either scale the + * data or report that scale is not supported (with depends + * on some API for such purpose). + */ + + /* Image size is different. Zero buffer first */ + if (q_data_in->width != q_data_out->width || + q_data_in->height != q_data_out->height) + memset(p_out, 0, q_data_out->sizeimage); out_vb->sequence = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++; in_vb->sequence = q_data_in->sequence++; @@ -547,8 +587,13 @@ static int device_process(struct vim2m_ctx *ctx, p += bytesperline - (q_data_in->fmt->depth >> 3); for (x = 0; x < width >> 1; x++) - copy_two_pixels(in, out, &p, &p_out, y_out, + copy_two_pixels(q_data_in, q_data_out, &p, &p_out, y_out, ctx->mode & MEM2MEM_HFLIP); + + /* Go to the next line at the out buffer */ + if (width < q_data_out->width) + p_out += ((q_data_out->width - width) + * q_data_out->fmt->depth) >> 3; } return 0;