Hi Sylwester,
On Wednesday 11 May 2011 17:17:10 Sylwester Nawrocki wrote:
> Add the subdev driver for the MIPI CSIS units available in S5P and
> Exynos4 SoC series. This driver supports both CSIS0 and CSIS1
> MIPI-CSI2 receivers.
> The driver requires Runtime PM to be enabled for proper operation.
>
> Signed-off-by: Sylwester Nawrocki <[email protected]>
> Signed-off-by: Kyungmin Park <[email protected]>
[snip]
> diff --git a/drivers/media/video/s5p-fimc/mipi-csis.c
> b/drivers/media/video/s5p-fimc/mipi-csis.c new file mode 100644
> index 0000000..d50efcb
> --- /dev/null
> +++ b/drivers/media/video/s5p-fimc/mipi-csis.c
> @@ -0,0 +1,722 @@
[snip]
> +static void s5pcsis_enable_interrupts(struct csis_state *state, bool on)
> +{
> + u32 val = s5pcsis_read(state, S5PCSIS_INTMSK);
> +
> + val = on ? val | S5PCSIS_INTMSK_EN_ALL :
> + val & ~S5PCSIS_INTMSK_EN_ALL;
> + s5pcsis_write(state, S5PCSIS_INTMSK, val);
Shouldn't you clear all interrupt flags by writing to S5PCSIS_INTSRC before
enabling interrupts, just in case ?
> +}
[snip]
> +static void s5pcsis_set_hsync_settle(struct csis_state *state, int settle)
> +{
> + u32 val = s5pcsis_read(state, S5PCSIS_DPHYCTRL);
> +
> + val &= ~S5PCSIS_DPHYCTRL_HSS_MASK | (settle << 27);
Do you mean
val = (val & ~S5PCSIS_DPHYCTRL_HSS_MASK) | (settle << 27);
?
> + s5pcsis_write(state, S5PCSIS_DPHYCTRL, val);
> +}
[snip]
> +static int s5pcsis_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh
> *fh, + struct v4l2_subdev_format *fmt)
> +{
> + struct csis_state *state = sd_to_csis_state(sd);
> + struct csis_pix_format const *csis_fmt;
> + struct v4l2_mbus_framefmt *mf;
> +
> + mf = __s5pcsis_get_format(state, fh, fmt->pad, fmt->which);
> +
> + if (fmt->pad == CSIS_PAD_SOURCE) {
> + if (mf) {
> + mutex_lock(&state->lock);
> + fmt->format = *mf;
> + mutex_unlock(&state->lock);
> + }
> + return 0;
> + }
> + csis_fmt = s5pcsis_try_format(&fmt->format);
> + if (mf) {
> + mutex_lock(&state->lock);
> + *mf = fmt->format;
> + if (mf == &state->format) /* Store the active format */
I would replace the test by
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
It's more explicit.
> + state->csis_fmt = csis_fmt;
> + mutex_unlock(&state->lock);
> + }
> + return 0;
> +}
[snip]
> +static int s5pcsis_suspend(struct device *dev)
> +{
> + struct s5p_platform_mipi_csis *pdata = dev->platform_data;
> + struct platform_device *pdev = to_platform_device(dev);
> + struct v4l2_subdev *sd = platform_get_drvdata(pdev);
> + struct csis_state *state = sd_to_csis_state(sd);
> + int ret;
> +
> + v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
> + __func__, state->flags);
> +
> + mutex_lock(&state->lock);
> + if (state->flags & ST_POWERED) {
> + s5pcsis_stop_stream(state);
> + ret = pdata->phy_enable(state->pdev, false);
> + if (ret)
> + goto unlock;
> +
> + if (state->supply && regulator_disable(state->supply))
> + goto unlock;
> +
> + clk_disable(state->clock[CSIS_CLK_GATE]);
> + state->flags &= ~ST_POWERED;
> + }
> + state->flags |= ST_SUSPENDED;
> + unlock:
> + mutex_unlock(&state->lock);
> + return ret ? -EAGAIN : 0;
> +}
> +
> +static int s5pcsis_resume(struct device *dev)
> +{
> + struct s5p_platform_mipi_csis *pdata = dev->platform_data;
> + struct platform_device *pdev = to_platform_device(dev);
> + struct v4l2_subdev *sd = platform_get_drvdata(pdev);
> + struct csis_state *state = sd_to_csis_state(sd);
> + int ret = 0;
> +
> + v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
> + __func__, state->flags);
> +
> + mutex_lock(&state->lock);
> + if (!(state->flags & ST_SUSPENDED))
> + goto unlock;
> +
> + if (!(state->flags & ST_POWERED)) {
If the device wasn't powered before being suspended, it should stay powered
off.
> + if (state->supply)
> + ret = regulator_enable(state->supply);
> + if (ret)
> + goto unlock;
> +
> + ret = pdata->phy_enable(state->pdev, true);
> + if (!ret) {
> + state->flags |= ST_POWERED;
> + } else {
> + regulator_disable(state->supply);
> + goto unlock;
> + }
> + clk_enable(state->clock[CSIS_CLK_GATE]);
> + }
> + if (state->flags & ST_STREAMING)
> + s5pcsis_start_stream(state);
> +
> + state->flags &= ~ST_SUSPENDED;
> + unlock:
> + mutex_unlock(&state->lock);
> + return ret ? -EAGAIN : 0;
> +}
[snip]
--
Regards,
Laurent Pinchart
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