Hi Sakari, Thank you for the review! On 26.05.2020 12:12, Sakari Ailus wrote:
Hi Andrey, On Sun, May 24, 2020 at 10:25:00PM +0300, Andrey Konovalov wrote:From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> IMX290 operates with multiple link frequency and pixel rate combinations. The initial driver used a single setting for both but since we now have the lane count support in place, let's add configurable link frequency and pixel rate. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Signed-off-by: Andrey Konovalov <andrey.konovalov@xxxxxxxxxx> --- drivers/media/i2c/imx290.c | 100 ++++++++++++++++++++++++------------- 1 file changed, 66 insertions(+), 34 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index a361c9ac8bd5..e800557cf423 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -38,8 +38,6 @@ #define IMX290_HMAX_2_720 0x19C8 #define IMX290_HMAX_4_720 0x0CE4-#define IMX290_DEFAULT_LINK_FREQ 445500000- static const char * const imx290_supply_name[] = { "vdda", "vddd", @@ -56,8 +54,6 @@ struct imx290_regval { struct imx290_mode { u32 width; u32 height; - u32 pixel_rate; - u32 link_freq_index;const struct imx290_regval *data;u32 data_size; @@ -248,8 +244,13 @@ static const struct imx290_regval imx290_10bit_settings[] = { };/* supported link frequencies */-static const s64 imx290_link_freq[] = { - IMX290_DEFAULT_LINK_FREQ, +static const s64 imx290_link_freq_2lanes[] = { + 891000000, /* 1920x1080 - 2 lane */ + 594000000, /* 1280x720 - 2 lane */ +}; +static const s64 imx290_link_freq_4lanes[] = { + 445500000, /* 1920x1080 - 4 lane */ + 297000000, /* 1280x720 - 4 lane */ };/* Mode configs */@@ -259,16 +260,12 @@ static const struct imx290_mode imx290_modes[] = { .height = 1080, .data = imx290_1080p_settings, .data_size = ARRAY_SIZE(imx290_1080p_settings), - .pixel_rate = 178200000, - .link_freq_index = 0, }, { .width = 1280, .height = 720, .data = imx290_720p_settings, .data_size = ARRAY_SIZE(imx290_720p_settings), - .pixel_rate = 178200000, - .link_freq_index = 0, }, };@@ -442,6 +439,32 @@ static int imx290_get_fmt(struct v4l2_subdev *sd,return 0; }+static u8 imx290_get_link_freq_index(struct imx290 *imx290)+{ + const struct imx290_mode *cur_mode = imx290->current_mode; + + return (cur_mode->width == 1920) ? 0 : 1;Could you use (imx290->current_mode - imx290_modes) / sizeof(*imx290_modes) or something like that? It'd have fewer chances of breaking if new modes are added.+} + +static s64 imx290_get_link_freq(struct imx290 *imx290) +{ + u8 index = imx290_get_link_freq_index(imx290); + + if (imx290->nlanes == 4) + return imx290_link_freq_4lanes[index]; + else + return imx290_link_freq_2lanes[index];Or even better: store the link frequencies to the modes themselves. They are a property of the modes after all.
Then we will get two sets (for 2 lanes and for 4 lanes) of two modes (1080p and 720p), right?
+} + +static u64 imx290_calc_pixel_rate(struct imx290 *imx290) +{ + s64 link_freq = imx290_get_link_freq(imx290); + u8 nlanes = imx290->nlanes; + + /* pixel rate = link_freq * 2 * nr_of_lanes / bits_per_sample */ + return (link_freq * 2 * nlanes / 10); +} + static int imx290_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) @@ -475,10 +498,14 @@ static int imx290_set_fmt(struct v4l2_subdev *sd, format = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); } else { format = &imx290->current_format; - __v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index); - __v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate, mode->pixel_rate); - imx290->current_mode = mode; + + if (imx290->link_freq) + __v4l2_ctrl_s_ctrl(imx290->link_freq, + imx290_get_link_freq_index(imx290)); + if (imx290->pixel_rate) + __v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate, + imx290_calc_pixel_rate(imx290)); }*format = fmt->format;@@ -502,12 +529,11 @@ static int imx290_entity_init_cfg(struct v4l2_subdev *subdev, return 0; }-static int imx290_write_current_format(struct imx290 *imx290,- struct v4l2_mbus_framefmt *format) +static int imx290_write_current_format(struct imx290 *imx290) { int ret;- switch (format->code) {+ switch (imx290->current_format.code) { case MEDIA_BUS_FMT_SRGGB10_1X10: ret = imx290_set_register_array(imx290, imx290_10bit_settings, ARRAY_SIZE( @@ -558,8 +584,8 @@ static int imx290_start_streaming(struct imx290 *imx290) return ret; }- /* Set current frame format */- ret = imx290_write_current_format(imx290, &imx290->current_format); + /* Apply the register values related to current frame format */ + ret = imx290_write_current_format(imx290); if (ret < 0) { dev_err(imx290->dev, "Could not set frame format\n"); return ret; @@ -821,12 +847,6 @@ static int imx290_probe(struct i2c_client *client) goto free_err; }- if (imx290->ep.link_frequencies[0] != IMX290_DEFAULT_LINK_FREQ) {This check needs to be modified to correspond to the driver's new capabilities, not removed.
Agreed. Do I understand correct that as the driver uses two link frequencies for a given number of lanes now, it must check that *the both* frequencies (for the given number of lanes) are listed in the device tree node? Thanks, Andrey
- dev_err(dev, "Unsupported link frequency\n"); - ret = -EINVAL; - goto free_err; - } - /* Only CSI2 is supported for now */ if (imx290->ep.bus_type != V4L2_MBUS_CSI2_DPHY) { dev_err(dev, "Unsupported bus type, should be CSI2\n"); @@ -879,23 +899,38 @@ static int imx290_probe(struct i2c_client *client)mutex_init(&imx290->lock); + /*+ * Initialize the frame format. In particular, imx290->current_mode + * and imx290->bpp are set to defaults: imx290_calc_pixel_rate() call + * below relies on these fields. + */ + imx290_entity_init_cfg(&imx290->sd, NULL); + v4l2_ctrl_handler_init(&imx290->ctrls, 3);v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,V4L2_CID_GAIN, 0, 72, 1, 0); - imx290->link_freq = - v4l2_ctrl_new_int_menu(&imx290->ctrls, - &imx290_ctrl_ops, - V4L2_CID_LINK_FREQ, - ARRAY_SIZE(imx290_link_freq) - 1, - 0, imx290_link_freq); + if (imx290->nlanes == 4) + imx290->link_freq = + v4l2_ctrl_new_int_menu(&imx290->ctrls, + &imx290_ctrl_ops, + V4L2_CID_LINK_FREQ, + ARRAY_SIZE(imx290_link_freq_4lanes) - 1, + 0, imx290_link_freq_4lanes); + else + imx290->link_freq = + v4l2_ctrl_new_int_menu(&imx290->ctrls, + &imx290_ctrl_ops, + V4L2_CID_LINK_FREQ, + ARRAY_SIZE(imx290_link_freq_2lanes) - 1, + 0, imx290_link_freq_2lanes); if (imx290->link_freq) imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;imx290->pixel_rate = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, - imx290_modes[0].pixel_rate); + imx290_calc_pixel_rate(imx290));imx290->sd.ctrl_handler = &imx290->ctrls; @@ -919,9 +954,6 @@ static int imx290_probe(struct i2c_client *client)goto free_ctrl; }- /* Initialize the frame format (this also sets imx290->current_mode) */- imx290_entity_init_cfg(&imx290->sd, NULL); - ret = v4l2_async_register_subdev(&imx290->sd); if (ret < 0) { dev_err(dev, "Could not register v4l2 device\n");
