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Message-ID: <20230713103912.favcnhqwjkzvsa6b@chromium.org>
Date: Thu, 13 Jul 2023 10:39:12 +0000
From: Tomasz Figa <tfiga@...omium.org>
To: ayaka <ayaka@...lik.info>
Cc: linux-media@...r.kernel.org, randy.li@...aptics.com,
Brian.Starkey@....com, boris.brezillon@...labora.com,
frkoenig@...omium.org, hans.verkuil@...co.com, hiroh@...omium.org,
hverkuil@...all.nl, kernel@...labora.com,
laurent.pinchart@...asonboard.com, linux-kernel@...r.kernel.org,
mchehab@...nel.org, narmstrong@...libre.com, nicolas@...fresne.ca,
sakari.ailus@....fi, stanimir.varbanov@...aro.org,
Helen Koike <helen.koike@...labora.com>
Subject: Re: [PATCH v7 2/9] media: vivid: Convert to v4l2_ext_pix_format
On Mon, Feb 06, 2023 at 12:33:01PM +0800, ayaka wrote:
> From: Helen Koike <helen.koike@...labora.com>
>
> Simplify Multi/Single planer API handling by converting to v4l2_ext_pix_format.
>
> Duplicate v4l2_ioctl_ops for touch devices. This is done to force the
> framework to use the ext hooks when the classic Api is used from
> userspace in Vid devices, and to keep touch devices with classic hook.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@...labora.com>
> Signed-off-by: Helen Koike <helen.koike@...labora.com>
> ---
> Changes in v7:
> - Force the userspace using the new APIs to operate non-touch drivers.
The primary objective of Linux development is not to break the
userspace. We can't just remove the old API, especially not from
existing drivers.
[snip]
> int vivid_try_fmt_vid_cap(struct file *file, void *priv,
> - struct v4l2_format *f)
> + struct v4l2_ext_pix_format *f)
> {
> - struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
> - struct v4l2_plane_pix_format *pfmt = mp->plane_fmt;
> struct vivid_dev *dev = video_drvdata(file);
> + struct v4l2_plane_pix_format *pfmt = f->plane_fmt;
> const struct vivid_fmt *fmt;
> unsigned bytesperline, max_bpl;
> unsigned factor = 1;
> unsigned w, h;
> unsigned p;
> - bool user_set_csc = !!(mp->flags & V4L2_PIX_FMT_FLAG_SET_CSC);
Why is this condition being removed?
Best regards,
Tomasz
>
> - fmt = vivid_get_format(dev, mp->pixelformat);
> + fmt = vivid_get_format(dev, f->pixelformat);
> if (!fmt) {
> dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
> - mp->pixelformat);
> - mp->pixelformat = V4L2_PIX_FMT_YUYV;
> - fmt = vivid_get_format(dev, mp->pixelformat);
> + f->pixelformat);
> + f->pixelformat = V4L2_PIX_FMT_YUYV;
> + fmt = vivid_get_format(dev, f->pixelformat);
> }
>
> - mp->field = vivid_field_cap(dev, mp->field);
> + f->field = vivid_field_cap(dev, f->field);
> if (vivid_is_webcam(dev)) {
> const struct v4l2_frmsize_discrete *sz =
> v4l2_find_nearest_size(webcam_sizes,
> VIVID_WEBCAM_SIZES, width,
> - height, mp->width, mp->height);
> + height, f->width, f->height);
>
> w = sz->width;
> h = sz->height;
> @@ -604,14 +603,14 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
> w = dev->src_rect.width;
> h = dev->src_rect.height;
> }
> - if (V4L2_FIELD_HAS_T_OR_B(mp->field))
> + if (V4L2_FIELD_HAS_T_OR_B(f->field))
> factor = 2;
> if (vivid_is_webcam(dev) ||
> (!dev->has_scaler_cap && !dev->has_crop_cap && !dev->has_compose_cap)) {
> - mp->width = w;
> - mp->height = h / factor;
> + f->width = w;
> + f->height = h / factor;
> } else {
> - struct v4l2_rect r = { 0, 0, mp->width, mp->height * factor };
> + struct v4l2_rect r = { 0, 0, f->width, f->height * factor };
>
> v4l2_rect_set_min_size(&r, &vivid_min_rect);
> v4l2_rect_set_max_size(&r, &vivid_max_rect);
> @@ -624,16 +623,15 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
> } else if (!dev->has_scaler_cap && !dev->has_crop_cap) {
> v4l2_rect_set_min_size(&r, &dev->src_rect);
> }
> - mp->width = r.width;
> - mp->height = r.height / factor;
> + f->width = r.width;
> + f->height = r.height / factor;
> }
>
> /* This driver supports custom bytesperline values */
>
> - mp->num_planes = fmt->buffers;
> for (p = 0; p < fmt->buffers; p++) {
> /* Calculate the minimum supported bytesperline value */
> - bytesperline = (mp->width * fmt->bit_depth[p]) >> 3;
> + bytesperline = (f->width * fmt->bit_depth[p]) >> 3;
> /* Calculate the maximum supported bytesperline value */
> max_bpl = (MAX_ZOOM * MAX_WIDTH * fmt->bit_depth[p]) >> 3;
>
> @@ -642,48 +640,49 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
> if (pfmt[p].bytesperline < bytesperline)
> pfmt[p].bytesperline = bytesperline;
>
> - pfmt[p].sizeimage = (pfmt[p].bytesperline * mp->height) /
> + pfmt[p].sizeimage = (pfmt[p].bytesperline * f->height) /
> fmt->vdownsampling[p] + fmt->data_offset[p];
> -
> - memset(pfmt[p].reserved, 0, sizeof(pfmt[p].reserved));
> }
> +
> + if (p < VIDEO_MAX_PLANES)
> + pfmt[p].sizeimage = 0;
> +
> for (p = fmt->buffers; p < fmt->planes; p++)
> - pfmt[0].sizeimage += (pfmt[0].bytesperline * mp->height *
> + pfmt[0].sizeimage += (pfmt[0].bytesperline * f->height *
> (fmt->bit_depth[p] / fmt->vdownsampling[p])) /
> (fmt->bit_depth[0] / fmt->vdownsampling[0]);
>
> - if (!user_set_csc || !v4l2_is_colorspace_valid(mp->colorspace))
> - mp->colorspace = vivid_colorspace_cap(dev);
> + if (!v4l2_is_colorspace_valid(f->colorspace))
> + f->colorspace = vivid_colorspace_cap(dev);
>
> - if (!user_set_csc || !v4l2_is_xfer_func_valid(mp->xfer_func))
> - mp->xfer_func = vivid_xfer_func_cap(dev);
> + if (!v4l2_is_xfer_func_valid(f->xfer_func))
> + f->xfer_func = vivid_xfer_func_cap(dev);
>
> if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
> - if (!user_set_csc || !v4l2_is_hsv_enc_valid(mp->hsv_enc))
> - mp->hsv_enc = vivid_hsv_enc_cap(dev);
> + if (!v4l2_is_hsv_enc_valid(f->hsv_enc))
> + f->hsv_enc = vivid_hsv_enc_cap(dev);
> } else if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
> - if (!user_set_csc || !v4l2_is_ycbcr_enc_valid(mp->ycbcr_enc))
> - mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
> + if (!v4l2_is_ycbcr_enc_valid(f->ycbcr_enc))
> + f->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
> } else {
> - mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
> + f->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
> }
>
> if (fmt->color_enc == TGP_COLOR_ENC_YCBCR ||
> fmt->color_enc == TGP_COLOR_ENC_RGB) {
> - if (!user_set_csc || !v4l2_is_quant_valid(mp->quantization))
> - mp->quantization = vivid_quantization_cap(dev);
> + if (!v4l2_is_quant_valid(f->quantization))
> + f->quantization = vivid_quantization_cap(dev);
> } else {
> - mp->quantization = vivid_quantization_cap(dev);
> + f->quantization = vivid_quantization_cap(dev);
> }
>
> - memset(mp->reserved, 0, sizeof(mp->reserved));
> + memset(f->reserved, 0, sizeof(f->reserved));
> return 0;
> }
[snip]
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