From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from perceval.ideasonboard.com ([95.142.166.194]:59149 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754576Ab2GRN60 (ORCPT ); Wed, 18 Jul 2012 09:58:26 -0400 From: Laurent Pinchart To: Guennadi Liakhovetski Cc: linux-media@vger.kernel.org Subject: [PATCH v2 2/9] ov772x: Select the default format at probe time Date: Wed, 18 Jul 2012 15:58:19 +0200 Message-Id: <1342619906-5820-3-git-send-email-laurent.pinchart@ideasonboard.com> In-Reply-To: <1342619906-5820-1-git-send-email-laurent.pinchart@ideasonboard.com> References: <1342619906-5820-1-git-send-email-laurent.pinchart@ideasonboard.com> Sender: linux-media-owner@vger.kernel.org List-ID: The format and window size are only initialized during the first g_fmt call. This leaves the device in an inconsistent state after initialization, which will cause problems when implementing pad operations. Move the format and window size initialization to probe time. Signed-off-by: Laurent Pinchart --- drivers/media/video/ov772x.c | 64 +++++++++++++++++++++--------------------- 1 files changed, 32 insertions(+), 32 deletions(-) diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c index 0fede50d..3f6e4bf 100644 --- a/drivers/media/video/ov772x.c +++ b/drivers/media/video/ov772x.c @@ -16,6 +16,7 @@ */ #include +#include #include #include #include @@ -504,20 +505,20 @@ static const struct ov772x_color_format ov772x_cfmts[] = { #define MAX_WIDTH VGA_WIDTH #define MAX_HEIGHT VGA_HEIGHT -static const struct ov772x_win_size ov772x_win_vga = { - .name = "VGA", - .width = VGA_WIDTH, - .height = VGA_HEIGHT, - .com7_bit = SLCT_VGA, - .regs = ov772x_vga_regs, -}; - -static const struct ov772x_win_size ov772x_win_qvga = { - .name = "QVGA", - .width = QVGA_WIDTH, - .height = QVGA_HEIGHT, - .com7_bit = SLCT_QVGA, - .regs = ov772x_qvga_regs, +static const struct ov772x_win_size ov772x_win_sizes[] = { + { + .name = "VGA", + .width = VGA_WIDTH, + .height = VGA_HEIGHT, + .com7_bit = SLCT_VGA, + .regs = ov772x_vga_regs, + }, { + .name = "QVGA", + .width = QVGA_WIDTH, + .height = QVGA_HEIGHT, + .com7_bit = SLCT_QVGA, + .regs = ov772x_qvga_regs, + }, }; /* @@ -693,19 +694,18 @@ static int ov772x_s_power(struct v4l2_subdev *sd, int on) static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height) { - __u32 diff; - const struct ov772x_win_size *win; - - /* default is QVGA */ - diff = abs(width - ov772x_win_qvga.width) + - abs(height - ov772x_win_qvga.height); - win = &ov772x_win_qvga; - - /* VGA */ - if (diff > - abs(width - ov772x_win_vga.width) + - abs(height - ov772x_win_vga.height)) - win = &ov772x_win_vga; + const struct ov772x_win_size *win = &ov772x_win_sizes[0]; + u32 best_diff = UINT_MAX; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(ov772x_win_sizes); ++i) { + u32 diff = abs(width - ov772x_win_sizes[i].width) + + abs(height - ov772x_win_sizes[i].height); + if (diff < best_diff) { + best_diff = diff; + win = &ov772x_win_sizes[i]; + } + } return win; } @@ -890,11 +890,6 @@ static int ov772x_g_fmt(struct v4l2_subdev *sd, { struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev); - if (!priv->win || !priv->cfmt) { - priv->cfmt = &ov772x_cfmts[0]; - priv->win = ov772x_select_win(VGA_WIDTH, VGA_HEIGHT); - } - mf->width = priv->win->width; mf->height = priv->win->height; mf->code = priv->cfmt->code; @@ -1103,6 +1098,11 @@ static int ov772x_probe(struct i2c_client *client, } ret = ov772x_video_probe(client); + if (ret < 0) + goto done; + + priv->cfmt = &ov772x_cfmts[0]; + priv->win = &ov772x_win_sizes[0]; done: if (ret) { -- 1.7.8.6