Hi Sakari,
Thanks for the patch.
On Tuesday 20 December 2011 21:28:05 Sakari Ailus wrote:
> From: Sakari Ailus <sakari.ai...@iki.fi>
>
> 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.c | 38 ++++++++++++--
> drivers/media/video/omap3isp/isp.h | 3 -
> drivers/media/video/omap3isp/ispcsiphy.c | 83 +++++++++++++++++++++++----
> drivers/media/video/omap3isp/ispcsiphy.h | 4 ++
> 4 files changed, 111 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/media/video/omap3isp/isp.c
> b/drivers/media/video/omap3isp/isp.c index b818cac..6020fd7 100644
> --- a/drivers/media/video/omap3isp/isp.c
> +++ b/drivers/media/video/omap3isp/isp.c
> @@ -737,7 +737,7 @@ static int isp_pipeline_enable(struct isp_pipeline
> *pipe, struct isp_device *isp = pipe->output->isp;
> struct media_entity *entity;
> struct media_pad *pad;
> - struct v4l2_subdev *subdev;
> + struct v4l2_subdev *subdev = NULL, *prev_subdev;
> unsigned long flags;
> int ret;
>
> @@ -759,11 +759,41 @@ static int isp_pipeline_enable(struct isp_pipeline
> *pipe, break;
>
> entity = pad->entity;
> + prev_subdev = subdev;
> subdev = media_entity_to_v4l2_subdev(entity);
>
> - ret = v4l2_subdev_call(subdev, video, s_stream, mode);
> - if (ret < 0 && ret != -ENOIOCTLCMD)
> - return ret;
> + /* Configure CSI-2 receiver based on sensor format. */
> + if (prev_subdev == &isp->isp_csi2a.subdev
> + || prev_subdev == &isp->isp_csi2c.subdev) {
> + struct v4l2_subdev_format fmt;
> +
> + fmt.pad = pad->index;
> + fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> + ret = v4l2_subdev_call(subdev, pad, get_fmt,
> + NULL, &fmt);
> + if (ret < 0)
> + return -EPIPE;
> +
> + ret = omap3isp_csiphy_config(
> + isp, prev_subdev, subdev,
> + &fmt.format);
> + if (ret < 0)
> + return -EPIPE;
> +
> + /* Start CSI-2 after configuration. */
> + ret = v4l2_subdev_call(prev_subdev, video,
> + s_stream, mode);
> + if (ret < 0 && ret != -ENOIOCTLCMD)
> + return ret;
> + }
> +
> + /* Start any other subdev except the CSI-2 receivers. */
> + if (subdev != &isp->isp_csi2a.subdev
> + && subdev != &isp->isp_csi2c.subdev) {
> + ret = v4l2_subdev_call(subdev, video, s_stream, mode);
> + if (ret < 0 && ret != -ENOIOCTLCMD)
> + return ret;
> + }
What about moving this to the CSI2 s_stream subdev operation ?
>
> if (subdev == &isp->isp_ccdc.subdev) {
> v4l2_subdev_call(&isp->isp_aewb.subdev, video,
> 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..f027ece 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 <mach/control.h>
(untested) ?
> #include "isp.h"
> #include "ispreg.h"
> #include "ispcsiphy.h"
> @@ -138,15 +140,78 @@ 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)
> +/*
> + * 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)
> {
> + 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;
Shouldn't lane configuration be retrieved from the sensor instead ? Sensors
could use different lane configuration depending on the mode. This could also
be implemented later when needed, but I don't think it would be too difficult
to get it right now.
> +
> + 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;
> +
> + /* FIXME: Do 34xx / 35xx require something here? */
> + if (cpu_is_omap3630())
> + omap_writel(cam_phy_ctrl,
> + OMAP343X_CTRL_BASE
> + + OMAP3630_CONTROL_CAMERA_PHY_CTRL);
You use cam_phy_ctrl inside the if statement only, you can move its
computation there.
> +
> + csi2_ddrclk_khz = sensor_fmt->pixelrate
> + / (2 * csi2->phy->num_data_lanes)
> + * omap3isp_video_format_info(sensor_fmt->code)->bpp;
> +
> + /*
> + * THS_TERM: Programmed value = ceil(12.5 ns/DDRClk period) - 1.
> + * THS_SETTLE: Programmed value = ceil(90 ns/DDRClk period) + 3.
> + */
> + csi2phy.ths_term = DIV_ROUND_UP(25 * csi2_ddrclk_khz, 2000000) - 1;
> + csi2phy.ths_settle = DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3;
> + 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 +227,10 @@ 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 +290,6 @@ 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);
--
Regards,
Laurent Pinchart
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