Hi Sakari,
Thanks for the patch.
On Thursday 15 December 2011 10:50:34 Sakari Ailus wrote:
> Configure CSI-2 phy based on platform data in the ISP driver rather than in
> platform code.
>
> Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
> ---
> drivers/media/video/omap3isp/isp.h | 3 -
> drivers/media/video/omap3isp/ispcsiphy.c | 95
> ++++++++++++++++++++++++++--- drivers/media/video/omap3isp/ispcsiphy.h |
> 4 +
> drivers/media/video/omap3isp/ispvideo.c | 19 ++++++
> 4 files changed, 108 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/media/video/omap3isp/isp.h
> b/drivers/media/video/omap3isp/isp.h index 705946e..c5935ae 100644
> --- a/drivers/media/video/omap3isp/isp.h
> +++ b/drivers/media/video/omap3isp/isp.h
> @@ -126,9 +126,6 @@ struct isp_reg {
>
> struct isp_platform_callback {
> u32 (*set_xclk)(struct isp_device *isp, u32 xclk, u8 xclksel);
> - int (*csiphy_config)(struct isp_csiphy *phy,
> - struct isp_csiphy_dphy_cfg *dphy,
> - struct isp_csiphy_lanes_cfg *lanes);
> void (*set_pixel_clock)(struct isp_device *isp, unsigned int pixelclk);
> };
>
> diff --git a/drivers/media/video/omap3isp/ispcsiphy.c
> b/drivers/media/video/omap3isp/ispcsiphy.c index 5be37ce..52af308 100644
> --- a/drivers/media/video/omap3isp/ispcsiphy.c
> +++ b/drivers/media/video/omap3isp/ispcsiphy.c
> @@ -28,6 +28,8 @@
> #include <linux/device.h>
> #include <linux/regulator/consumer.h>
>
> +#include "../../../../arch/arm/mach-omap2/control.h"
> +
> #include "isp.h"
> #include "ispreg.h"
> #include "ispcsiphy.h"
> @@ -138,15 +140,90 @@ static void csiphy_dphy_config(struct isp_csiphy
> *phy) isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> }
>
> -static int csiphy_config(struct isp_csiphy *phy,
> - struct isp_csiphy_dphy_cfg *dphy,
> - struct isp_csiphy_lanes_cfg *lanes)
> +/*
> + * THS_TERM: Programmed value = ceil(12.5 ns/DDRClk period) - 1.
> + * THS_SETTLE: Programmed value = ceil(90 ns/DDRClk period) + 3.
> + */
> +#define THS_TERM_D 2000000
> +#define THS_TERM(ddrclk_khz) \
> +( \
> + ((25 * (ddrclk_khz)) % THS_TERM_D) ? \
> + ((25 * (ddrclk_khz)) / THS_TERM_D) : \
> + ((25 * (ddrclk_khz)) / THS_TERM_D) - 1 \
> +)
> +
> +#define THS_SETTLE_D 1000000
> +#define THS_SETTLE(ddrclk_khz) \
> +( \
> + ((90 * (ddrclk_khz)) % THS_SETTLE_D) ? \
> + ((90 * (ddrclk_khz)) / THS_SETTLE_D) + 4 : \
> + ((90 * (ddrclk_khz)) / THS_SETTLE_D) + 3 \
> +)
The THS_TERM and THS_SETTLE macros are only used once. I would just put that
code explictly where it gets used. The macros hinder readability.
> +
> +/*
> + * TCLK values are OK at their reset values
> + */
> +#define TCLK_TERM 0
> +#define TCLK_MISS 1
> +#define TCLK_SETTLE 14
> +
> +int omap3isp_csiphy_config(struct isp_device *isp,
> + struct v4l2_subdev *csi2_subdev,
> + struct v4l2_subdev *sensor,
> + struct v4l2_mbus_framefmt *sensor_fmt)
The number of lanes can depend on the format. Wouldn't it be better to add a
subdev operation to query the sensor for its bus configuration instead of
relying on ISP platform data ?
> {
> + struct isp_v4l2_subdevs_group *subdevs = sensor->host_priv;
> + struct isp_csi2_device *csi2 = v4l2_get_subdevdata(csi2_subdev);
> + struct isp_csiphy_dphy_cfg csi2phy;
> + int csi2_ddrclk_khz;
> + struct isp_csiphy_lanes_cfg *lanes;
> unsigned int used_lanes = 0;
> unsigned int i;
> + u32 cam_phy_ctrl;
> +
> + if (subdevs->interface == ISP_INTERFACE_CCP2B_PHY1
> + || subdevs->interface == ISP_INTERFACE_CCP2B_PHY2)
> + lanes = subdevs->bus.ccp2.lanecfg;
> + else
> + lanes = subdevs->bus.csi2.lanecfg;
> +
> + if (!lanes) {
> + dev_err(isp->dev, "no lane configuration\n");
> + return -EINVAL;
> + }
> +
> + cam_phy_ctrl = omap_readl(
> + OMAP343X_CTRL_BASE + OMAP3630_CONTROL_CAMERA_PHY_CTRL);
> + /*
> + * SCM.CONTROL_CAMERA_PHY_CTRL
> + * - bit[4] : CSIPHY1 data sent to CSIB
> + * - bit [3:2] : CSIPHY1 config: 00 d-phy, 01/10 ccp2
> + * - bit [1:0] : CSIPHY2 config: 00 d-phy, 01/10 ccp2
> + */
> + if (subdevs->interface == ISP_INTERFACE_CCP2B_PHY1)
> + cam_phy_ctrl |= 1 << 2;
> + else if (subdevs->interface == ISP_INTERFACE_CSI2C_PHY1)
> + cam_phy_ctrl &= 1 << 2;
> +
> + if (subdevs->interface == ISP_INTERFACE_CCP2B_PHY2)
> + cam_phy_ctrl |= 1;
> + else if (subdevs->interface == ISP_INTERFACE_CSI2A_PHY2)
> + cam_phy_ctrl &= 1;
> +
> + omap_writel(cam_phy_ctrl,
> + OMAP343X_CTRL_BASE + OMAP3630_CONTROL_CAMERA_PHY_CTRL);
> +
> + csi2_ddrclk_khz = sensor_fmt->pixel_clock
> + / (2 * csi2->phy->num_data_lanes)
> + * omap3isp_video_format_info(sensor_fmt->code)->bpp;
> + csi2phy.ths_term = THS_TERM(csi2_ddrclk_khz);
> + csi2phy.ths_settle = THS_SETTLE(csi2_ddrclk_khz);
> + csi2phy.tclk_term = TCLK_TERM;
> + csi2phy.tclk_miss = TCLK_MISS;
> + csi2phy.tclk_settle = TCLK_SETTLE;
>
> /* Clock and data lanes verification */
> - for (i = 0; i < phy->num_data_lanes; i++) {
> + for (i = 0; i < csi2->phy->num_data_lanes; i++) {
> if (lanes->data[i].pol > 1 || lanes->data[i].pos > 3)
> return -EINVAL;
>
> @@ -162,10 +239,10 @@ static int csiphy_config(struct isp_csiphy *phy,
> if (lanes->clk.pos == 0 || used_lanes & (1 << lanes->clk.pos))
> return -EINVAL;
>
> - mutex_lock(&phy->mutex);
> - phy->dphy = *dphy;
> - phy->lanes = *lanes;
> - mutex_unlock(&phy->mutex);
> + mutex_lock(&csi2->phy->mutex);
> + csi2->phy->dphy = csi2phy;
> + csi2->phy->lanes = *lanes;
> + mutex_unlock(&csi2->phy->mutex);
>
> return 0;
> }
> @@ -225,8 +302,6 @@ int omap3isp_csiphy_init(struct isp_device *isp)
> struct isp_csiphy *phy1 = &isp->isp_csiphy1;
> struct isp_csiphy *phy2 = &isp->isp_csiphy2;
>
> - isp->platform_cb.csiphy_config = csiphy_config;
> -
> phy2->isp = isp;
> phy2->csi2 = &isp->isp_csi2a;
> phy2->num_data_lanes = ISP_CSIPHY2_NUM_DATA_LANES;
> diff --git a/drivers/media/video/omap3isp/ispcsiphy.h
> b/drivers/media/video/omap3isp/ispcsiphy.h index e93a661..9f93222 100644
> --- a/drivers/media/video/omap3isp/ispcsiphy.h
> +++ b/drivers/media/video/omap3isp/ispcsiphy.h
> @@ -56,6 +56,10 @@ struct isp_csiphy {
> struct isp_csiphy_dphy_cfg dphy;
> };
>
> +int omap3isp_csiphy_config(struct isp_device *isp,
> + struct v4l2_subdev *csi2_subdev,
> + struct v4l2_subdev *sensor,
> + struct v4l2_mbus_framefmt *fmt);
> int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
> void omap3isp_csiphy_release(struct isp_csiphy *phy);
> int omap3isp_csiphy_init(struct isp_device *isp);
> diff --git a/drivers/media/video/omap3isp/ispvideo.c
> b/drivers/media/video/omap3isp/ispvideo.c index 17bc03c..cdcf1d0 100644
> --- a/drivers/media/video/omap3isp/ispvideo.c
> +++ b/drivers/media/video/omap3isp/ispvideo.c
> @@ -299,6 +299,8 @@ static int isp_video_validate_pipeline(struct
> isp_pipeline *pipe)
>
> while (1) {
> unsigned int shifter_link;
> + struct v4l2_subdev *_subdev;
What about a more descriptive name ?
> +
> /* Retrieve the sink format */
> pad = &subdev->entity.pads[0];
> if (!(pad->flags & MEDIA_PAD_FL_SINK))
> @@ -342,6 +344,7 @@ static int isp_video_validate_pipeline(struct
> isp_pipeline *pipe) if (media_entity_type(pad->entity) !=
> MEDIA_ENT_T_V4L2_SUBDEV)
> break;
>
> + _subdev = subdev;
> subdev = media_entity_to_v4l2_subdev(pad->entity);
>
> fmt_source.pad = pad->index;
> @@ -355,6 +358,22 @@ static int isp_video_validate_pipeline(struct
> isp_pipeline *pipe) fmt_source.format.height != fmt_sink.format.height)
> return -EPIPE;
>
> + /* Configure CSI-2 receiver based on sensor format. */
> + if (_subdev == &isp->isp_csi2a.subdev
> + || _subdev == &isp->isp_csi2c.subdev) {
> + if (cpu_is_omap3630()) {
> + /*
> + * FIXME: CSI-2 is supported only on
> + * the 3630!
> + */
Is it ? Or do you mean by the driver ? What would it take to support it on
OMAP34xx and OMAP35xx ?
> + ret = omap3isp_csiphy_config(
> + isp, _subdev, subdev,
> + &fmt_source.format);
> + if (IS_ERR_VALUE(ret))
> + return -EPIPE;
> + }
> + }
This isn't really pipeline validation, is it ? Should this be performed in
isp_pipeline_enable() instead ?
> +
> if (subdev->host_priv) {
> /*
> * host_priv != NULL: this is a sensor. Issue
--
Regards,
Laurent Pinchart
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