From patchwork Mon Sep 5 09:17:13 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Hecht X-Patchwork-Id: 1124722 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p859HNBa006870 for ; Mon, 5 Sep 2011 09:17:25 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751749Ab1IEJRV (ORCPT ); Mon, 5 Sep 2011 05:17:21 -0400 Received: from mail-ey0-f174.google.com ([209.85.215.174]:34799 "EHLO mail-ey0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751560Ab1IEJRU (ORCPT ); Mon, 5 Sep 2011 05:17:20 -0400 Received: by eyx24 with SMTP id 24so3314264eyx.19 for ; Mon, 05 Sep 2011 02:17:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=date:from:x-x-sender:to:cc:subject:message-id:user-agent :mime-version:content-type; bh=Wjz04E3NFKihantuUdTXd9e0F1GRbE888Ze8yOj6NxA=; b=lXNGTalzBT5Ezz5sjX8koqp5gzALWqIZutr0yzIRHN5SfM4OGiq0QzIoGROTvWah3P 8nXtzDvjwhmrHzTi7Qs5JZmg9e5Bo7aAzDV21EdDCfQNcYbNDw60i/o+8dmUy7ShuJgX IL8WliOQ2F+VHvPCmfgecVtwjjr65kuvnvK+Y= Received: by 10.213.19.78 with SMTP id z14mr1263675eba.11.1315214239347; Mon, 05 Sep 2011 02:17:19 -0700 (PDT) Received: from ipanema.local (p5DDD9D3F.dip.t-dialin.net [93.221.157.63]) by mx.google.com with ESMTPS id e4sm8943683eec.10.2011.09.05.02.17.16 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 05 Sep 2011 02:17:18 -0700 (PDT) Date: Mon, 5 Sep 2011 09:17:13 +0000 (UTC) From: Bastian Hecht X-X-Sender: basti@ipanema To: linux-media@vger.kernel.org cc: Guennadi Liakhovetski , Laurent Pinchart Subject: [PATCH 1/2 v3] media: Add support for arbitrary resolution for the ov5642 camera driver Message-ID: User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 05 Sep 2011 09:17:25 +0000 (UTC) This patch adds the ability to get arbitrary resolutions with a width up to 2592 and a height up to 720 pixels instead of the standard 1280x720 only. --- -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/media/video/ov5642.c b/drivers/media/video/ov5642.c index 6410bda..54c822c 100644 --- a/drivers/media/video/ov5642.c +++ b/drivers/media/video/ov5642.c @@ -14,8 +14,10 @@ * published by the Free Software Foundation. */ +#include #include #include +#include #include #include @@ -34,7 +36,7 @@ #define REG_WINDOW_START_Y_LOW 0x3803 #define REG_WINDOW_WIDTH_HIGH 0x3804 #define REG_WINDOW_WIDTH_LOW 0x3805 -#define REG_WINDOW_HEIGHT_HIGH 0x3806 +#define REG_WINDOW_HEIGHT_HIGH 0x3806 #define REG_WINDOW_HEIGHT_LOW 0x3807 #define REG_OUT_WIDTH_HIGH 0x3808 #define REG_OUT_WIDTH_LOW 0x3809 @@ -44,19 +46,44 @@ #define REG_OUT_TOTAL_WIDTH_LOW 0x380d #define REG_OUT_TOTAL_HEIGHT_HIGH 0x380e #define REG_OUT_TOTAL_HEIGHT_LOW 0x380f +#define REG_OUTPUT_FORMAT 0x4300 +#define REG_ISP_CTRL_01 0x5001 +#define REG_AVG_WINDOW_END_X_HIGH 0x5682 +#define REG_AVG_WINDOW_END_X_LOW 0x5683 +#define REG_AVG_WINDOW_END_Y_HIGH 0x5686 +#define REG_AVG_WINDOW_END_Y_LOW 0x5687 + +/* active pixel array size */ +#define OV5642_SENSOR_SIZE_X 2592 +#define OV5642_SENSOR_SIZE_Y 1944 /* - * define standard resolution. - * Works currently only for up to 720 lines - * eg. 320x240, 640x480, 800x600, 1280x720, 2048x720 + * About OV5642 resolution, cropping and binning: + * This sensor supports it all, at least in the feature description. + * Unfortunately, no combination of appropriate registers settings could make + * the chip work the intended way. As it works with predefined register lists, + * some undocumented registers are presumably changed there to achieve their + * goals. + * This driver currently only works for resolutions up to 720 lines with a + * 1:1 scale. Hopefully these restrictions will be removed in the future. */ +#define OV5642_MAX_WIDTH OV5642_SENSOR_SIZE_X +#define OV5642_MAX_HEIGHT 720 -#define OV5642_WIDTH 1280 -#define OV5642_HEIGHT 720 -#define OV5642_TOTAL_WIDTH 3200 -#define OV5642_TOTAL_HEIGHT 2000 -#define OV5642_SENSOR_SIZE_X 2592 -#define OV5642_SENSOR_SIZE_Y 1944 +/* default sizes */ +#define OV5642_DEFAULT_WIDTH 1280 +#define OV5642_DEFAULT_HEIGHT OV5642_MAX_HEIGHT + +/* minimum extra blanking */ +#define BLANKING_EXTRA_WIDTH 500 +#define BLANKING_EXTRA_HEIGHT 20 + +/* + * the sensor's autoexposure is buggy when setting total_height low. + * It tries to expose longer than 1 frame period without taking care of it + * and this leads to weird output. So we set 1000 lines as minimum. + */ +#define BLANKING_MIN_HEIGHT 1000 struct regval_list { u16 reg_num; @@ -581,6 +608,11 @@ struct ov5642_datafmt { struct ov5642 { struct v4l2_subdev subdev; const struct ov5642_datafmt *fmt; + struct v4l2_rect crop_rect; + + /* blanking information */ + int total_width; + int total_height; }; static const struct ov5642_datafmt ov5642_colour_fmts[] = { @@ -641,6 +673,21 @@ static int reg_write(struct i2c_client *client, u16 reg, u8 val) return 0; } + +/* + * convenience function to write 16 bit register values that are split up + * into two consecutive high and low parts + */ +static int reg_write16(struct i2c_client *client, u16 reg, u16 val16) +{ + int ret; + + ret = reg_write(client, reg, val16 >> 8); + if (ret) + return ret; + return reg_write(client, reg + 1, val16 & 0x00ff); +} + #ifdef CONFIG_VIDEO_ADV_DEBUG static int ov5642_get_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { @@ -684,107 +731,101 @@ static int ov5642_write_array(struct i2c_client *client, return 0; } -static int ov5642_set_resolution(struct i2c_client *client) +static int ov5642_set_resolution(struct v4l2_subdev *sd) { + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov5642 *priv = to_ov5642(client); + int width = priv->crop_rect.width; + int height = priv->crop_rect.height; + int total_width = priv->total_width; + int total_height = priv->total_height; + int start_x = (OV5642_SENSOR_SIZE_X - width) / 2; + int start_y = (OV5642_SENSOR_SIZE_Y - height) / 2; int ret; - u8 start_x_high = ((OV5642_SENSOR_SIZE_X - OV5642_WIDTH) / 2) >> 8; - u8 start_x_low = ((OV5642_SENSOR_SIZE_X - OV5642_WIDTH) / 2) & 0xff; - u8 start_y_high = ((OV5642_SENSOR_SIZE_Y - OV5642_HEIGHT) / 2) >> 8; - u8 start_y_low = ((OV5642_SENSOR_SIZE_Y - OV5642_HEIGHT) / 2) & 0xff; - - u8 width_high = OV5642_WIDTH >> 8; - u8 width_low = OV5642_WIDTH & 0xff; - u8 height_high = OV5642_HEIGHT >> 8; - u8 height_low = OV5642_HEIGHT & 0xff; - - u8 total_width_high = OV5642_TOTAL_WIDTH >> 8; - u8 total_width_low = OV5642_TOTAL_WIDTH & 0xff; - u8 total_height_high = OV5642_TOTAL_HEIGHT >> 8; - u8 total_height_low = OV5642_TOTAL_HEIGHT & 0xff; - - ret = reg_write(client, REG_WINDOW_START_X_HIGH, start_x_high); - if (!ret) - ret = reg_write(client, REG_WINDOW_START_X_LOW, start_x_low); - if (!ret) - ret = reg_write(client, REG_WINDOW_START_Y_HIGH, start_y_high); - if (!ret) - ret = reg_write(client, REG_WINDOW_START_Y_LOW, start_y_low); + /* + * This should set the starting point for cropping. + * Doesn't work so far. + */ + ret = reg_write16(client, REG_WINDOW_START_X_HIGH, start_x); if (!ret) - ret = reg_write(client, REG_WINDOW_WIDTH_HIGH, width_high); - if (!ret) - ret = reg_write(client, REG_WINDOW_WIDTH_LOW , width_low); - if (!ret) - ret = reg_write(client, REG_WINDOW_HEIGHT_HIGH, height_high); - if (!ret) - ret = reg_write(client, REG_WINDOW_HEIGHT_LOW, height_low); + ret = reg_write16(client, REG_WINDOW_START_Y_HIGH, start_y); + if (!ret) { + priv->crop_rect.left = start_x; + priv->crop_rect.top = start_y; + } if (!ret) - ret = reg_write(client, REG_OUT_WIDTH_HIGH, width_high); + ret = reg_write16(client, REG_WINDOW_WIDTH_HIGH, width); if (!ret) - ret = reg_write(client, REG_OUT_WIDTH_LOW , width_low); - if (!ret) - ret = reg_write(client, REG_OUT_HEIGHT_HIGH, height_high); + ret = reg_write16(client, REG_WINDOW_HEIGHT_HIGH, height); + if (ret) + return ret; + priv->crop_rect.width = width; + priv->crop_rect.height = height; + + /* Set the output window size. Only 1:1 scale is supported so far. */ + ret = reg_write16(client, REG_OUT_WIDTH_HIGH, width); if (!ret) - ret = reg_write(client, REG_OUT_HEIGHT_LOW, height_low); + ret = reg_write16(client, REG_OUT_HEIGHT_HIGH, height); + /* Total width = output size + blanking */ if (!ret) - ret = reg_write(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width_high); + ret = reg_write16(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width); if (!ret) - ret = reg_write(client, REG_OUT_TOTAL_WIDTH_LOW, total_width_low); + ret = reg_write16(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height); + + /* Sets the window for AWB calculations */ if (!ret) - ret = reg_write(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height_high); + ret = reg_write16(client, REG_AVG_WINDOW_END_X_HIGH, width); if (!ret) - ret = reg_write(client, REG_OUT_TOTAL_HEIGHT_LOW, total_height_low); + ret = reg_write16(client, REG_AVG_WINDOW_END_Y_HIGH, height); return ret; } -static int ov5642_try_fmt(struct v4l2_subdev *sd, - struct v4l2_mbus_framefmt *mf) +static int ov5642_try_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov5642 *priv = to_ov5642(client); const struct ov5642_datafmt *fmt = ov5642_find_datafmt(mf->code); - dev_dbg(sd->v4l2_dev->dev, "%s(%u) width: %u heigth: %u\n", - __func__, mf->code, mf->width, mf->height); + mf->width = priv->crop_rect.width; + mf->height = priv->crop_rect.height; if (!fmt) { mf->code = ov5642_colour_fmts[0].code; mf->colorspace = ov5642_colour_fmts[0].colorspace; } - mf->width = OV5642_WIDTH; - mf->height = OV5642_HEIGHT; mf->field = V4L2_FIELD_NONE; return 0; } -static int ov5642_s_fmt(struct v4l2_subdev *sd, - struct v4l2_mbus_framefmt *mf) +static int ov5642_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov5642 *priv = to_ov5642(client); - - dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code); + int ret; /* MIPI CSI could have changed the format, double-check */ if (!ov5642_find_datafmt(mf->code)) return -EINVAL; ov5642_try_fmt(sd, mf); - priv->fmt = ov5642_find_datafmt(mf->code); - ov5642_write_array(client, ov5642_default_regs_init); - ov5642_set_resolution(client); - ov5642_write_array(client, ov5642_default_regs_finalise); + ret = ov5642_write_array(client, ov5642_default_regs_init); + if (!ret) + ret = ov5642_set_resolution(sd); + if (!ret) + ret = ov5642_write_array(client, ov5642_default_regs_finalise); - return 0; + return ret; } -static int ov5642_g_fmt(struct v4l2_subdev *sd, - struct v4l2_mbus_framefmt *mf) +static int ov5642_g_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov5642 *priv = to_ov5642(client); @@ -793,8 +834,8 @@ static int ov5642_g_fmt(struct v4l2_subdev *sd, mf->code = fmt->code; mf->colorspace = fmt->colorspace; - mf->width = OV5642_WIDTH; - mf->height = OV5642_HEIGHT; + mf->width = priv->crop_rect.width; + mf->height = priv->crop_rect.height; mf->field = V4L2_FIELD_NONE; return 0; @@ -827,15 +868,44 @@ static int ov5642_g_chip_ident(struct v4l2_subdev *sd, return 0; } +static int ov5642_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov5642 *priv = to_ov5642(client); + struct v4l2_rect *rect = &a->c; + int ret; + + v4l_bound_align_image(&rect->width, 48, OV5642_MAX_WIDTH, 1, + &rect->height, 32, OV5642_MAX_HEIGHT, 1, 0); + + priv->crop_rect.width = rect->width; + priv->crop_rect.height = rect->height; + priv->total_width = rect->width + BLANKING_EXTRA_WIDTH; + priv->total_height = max_t(int, rect->height + + BLANKING_EXTRA_HEIGHT, + BLANKING_MIN_HEIGHT); + priv->crop_rect.width = rect->width; + priv->crop_rect.height = rect->height; + + ret = ov5642_write_array(client, ov5642_default_regs_init); + if (!ret) + ret = ov5642_set_resolution(sd); + if (!ret) + ret = ov5642_write_array(client, ov5642_default_regs_finalise); + + return ret; +} + static int ov5642_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) { + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov5642 *priv = to_ov5642(client); struct v4l2_rect *rect = &a->c; + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; - a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - rect->top = 0; - rect->left = 0; - rect->width = OV5642_WIDTH; - rect->height = OV5642_HEIGHT; + *rect = priv->crop_rect; return 0; } @@ -844,8 +914,8 @@ static int ov5642_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) { a->bounds.left = 0; a->bounds.top = 0; - a->bounds.width = OV5642_WIDTH; - a->bounds.height = OV5642_HEIGHT; + a->bounds.width = OV5642_MAX_WIDTH; + a->bounds.height = OV5642_MAX_HEIGHT; a->defrect = a->bounds; a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; a->pixelaspect.numerator = 1; @@ -858,9 +928,8 @@ static int ov5642_g_mbus_config(struct v4l2_subdev *sd, struct v4l2_mbus_config *cfg) { cfg->type = V4L2_MBUS_CSI2; - cfg->flags = V4L2_MBUS_CSI2_2_LANE | - V4L2_MBUS_CSI2_CHANNEL_0 | - V4L2_MBUS_CSI2_CONTINUOUS_CLOCK; + cfg->flags = V4L2_MBUS_CSI2_2_LANE | V4L2_MBUS_CSI2_CHANNEL_0 | + V4L2_MBUS_CSI2_CONTINUOUS_CLOCK; return 0; } @@ -870,6 +939,7 @@ static struct v4l2_subdev_video_ops ov5642_subdev_video_ops = { .g_mbus_fmt = ov5642_g_fmt, .try_mbus_fmt = ov5642_try_fmt, .enum_mbus_fmt = ov5642_enum_fmt, + .s_crop = ov5642_s_crop, .g_crop = ov5642_g_crop, .cropcap = ov5642_cropcap, .g_mbus_config = ov5642_g_mbus_config, @@ -941,8 +1011,17 @@ static int ov5642_probe(struct i2c_client *client, v4l2_i2c_subdev_init(&priv->subdev, client, &ov5642_subdev_ops); - icd->ops = NULL; - priv->fmt = &ov5642_colour_fmts[0]; + icd->ops = NULL; + priv->fmt = &ov5642_colour_fmts[0]; + + priv->crop_rect.width = OV5642_DEFAULT_WIDTH; + priv->crop_rect.height = OV5642_DEFAULT_HEIGHT; + priv->crop_rect.left = (OV5642_MAX_WIDTH - OV5642_DEFAULT_WIDTH) / 2; + priv->crop_rect.top = (OV5642_MAX_HEIGHT - OV5642_DEFAULT_HEIGHT) / 2; + priv->crop_rect.width = OV5642_DEFAULT_WIDTH; + priv->crop_rect.height = OV5642_DEFAULT_HEIGHT; + priv->total_width = OV5642_DEFAULT_WIDTH + BLANKING_EXTRA_WIDTH; + priv->total_height = BLANKING_MIN_HEIGHT; ret = ov5642_video_probe(icd, client); if (ret < 0) @@ -951,6 +1030,7 @@ static int ov5642_probe(struct i2c_client *client, return 0; error: + icd->ops = NULL; kfree(priv); return ret; } @@ -961,6 +1041,7 @@ static int ov5642_remove(struct i2c_client *client) struct soc_camera_device *icd = client->dev.platform_data; struct soc_camera_link *icl = to_soc_camera_link(icd); + icd->ops = NULL; if (icl->free_bus) icl->free_bus(icl); kfree(priv);