> -----Original Message-----
> From: Aguirre, Sergio
> Sent: Friday, November 19, 2010 5:24 PM
> To: Laurent Pinchart
> Cc: linux-media@xxxxxxxxxxxxxxx; Aguirre, Sergio
> Subject: [omap3isp RFC][PATCH 1/4] omap3isp: Abstract isp subdevs clock
> control
>
> Submodules shouldn't be aware of global register bit structure,
> specially if the submodules are shared in the future with
> other TI architectures (Davinci, future OMAPs, etc)
Oops, I just noticed a bug in this patch in clock disabling...
Will resend the updated version.
Regards,
Sergio
>
> Signed-off-by: Sergio Aguirre <saaguirre@xxxxxx>
> ---
> drivers/media/video/isp/isp.c | 54
> ++++++++++++++++++++++++++++++++++
> drivers/media/video/isp/isp.h | 12 +++++++
> drivers/media/video/isp/ispccdc.c | 6 +--
> drivers/media/video/isp/isppreview.c | 6 +--
> drivers/media/video/isp/ispresizer.c | 6 +--
> 5 files changed, 72 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/media/video/isp/isp.c b/drivers/media/video/isp/isp.c
> index 30bdc48..2e5030f 100644
> --- a/drivers/media/video/isp/isp.c
> +++ b/drivers/media/video/isp/isp.c
> @@ -991,6 +991,60 @@ void isp_sbl_disable(struct isp_device *isp, enum
> isp_sbl_resource res)
> * Clock management
> */
>
> +void isp_subclk_enable(struct isp_device *isp, enum isp_subclk_resource
> res)
> +{
> + u32 clk = 0;
> +
> + isp->subclk_resources |= res;
> +
> + if (isp->subclk_resources & OMAP3_ISP_SUBCLK_H3A)
> + clk |= ISPCTRL_H3A_CLK_EN;
> +
> + if (isp->subclk_resources & OMAP3_ISP_SUBCLK_HIST)
> + clk |= ISPCTRL_HIST_CLK_EN;
> +
> + if (isp->subclk_resources & OMAP3_ISP_SUBCLK_RESIZER)
> + clk |= ISPCTRL_RSZ_CLK_EN;
> +
> + /* NOTE: For CCDC & Preview submodules, we need to affect internal
> + * RAM aswell.
> + */
> + if (isp->subclk_resources & OMAP3_ISP_SUBCLK_CCDC)
> + clk |= ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN;
> +
> + if (isp->subclk_resources & OMAP3_ISP_SUBCLK_PREVIEW)
> + clk |= ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN;
> +
> + isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, clk);
> +}
> +
> +void isp_subclk_disable(struct isp_device *isp, enum isp_subclk_resource
> res)
> +{
> + u32 clk = 0;
> +
> + isp->subclk_resources &= ~res;
> +
> + if (!(isp->subclk_resources & OMAP3_ISP_SUBCLK_H3A))
> + clk |= ISPCTRL_H3A_CLK_EN;
> +
> + if (!(isp->subclk_resources & OMAP3_ISP_SUBCLK_HIST))
> + clk |= ISPCTRL_HIST_CLK_EN;
> +
> + if (!(isp->subclk_resources & OMAP3_ISP_SUBCLK_RESIZER))
> + clk |= ISPCTRL_RSZ_CLK_EN;
> +
> + /* NOTE: For CCDC & Preview submodules, we need to affect internal
> + * RAM aswell.
> + */
> + if (!(isp->subclk_resources & OMAP3_ISP_SUBCLK_CCDC))
> + clk |= ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN;
> +
> + if (!(isp->subclk_resources & OMAP3_ISP_SUBCLK_PREVIEW))
> + clk |= ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN;
> +
> + isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, clk);
> +}
> +
> /*
> * isp_enable_clocks - Enable ISP clocks
> * @isp: OMAP3 ISP device
> diff --git a/drivers/media/video/isp/isp.h b/drivers/media/video/isp/isp.h
> index b8f63e2..1260e9f 100644
> --- a/drivers/media/video/isp/isp.h
> +++ b/drivers/media/video/isp/isp.h
> @@ -85,6 +85,14 @@ enum isp_sbl_resource {
> OMAP3_ISP_SBL_RESIZER_WRITE = 0x200,
> };
>
> +enum isp_subclk_resource {
> + OMAP3_ISP_SUBCLK_CCDC = 0x1,
> + OMAP3_ISP_SUBCLK_H3A = 0x2,
> + OMAP3_ISP_SUBCLK_HIST = 0x4,
> + OMAP3_ISP_SUBCLK_PREVIEW = 0x8,
> + OMAP3_ISP_SUBCLK_RESIZER = 0x10,
> +};
> +
> enum isp_interface_type {
> ISP_INTERFACE_PARALLEL,
> ISP_INTERFACE_CSI2A_PHY2,
> @@ -262,6 +270,7 @@ struct isp_device {
> struct isp_csiphy isp_csiphy2;
>
> unsigned int sbl_resources;
> + unsigned int subclk_resources;
>
> struct iommu *iommu;
> };
> @@ -294,6 +303,9 @@ void isp_print_status(struct isp_device *isp);
> void isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res);
> void isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res);
>
> +void isp_subclk_enable(struct isp_device *isp, enum isp_subclk_resource
> res);
> +void isp_subclk_disable(struct isp_device *isp, enum isp_subclk_resource
> res);
> +
> int omap3isp_register_entities(struct platform_device *pdev,
> struct v4l2_device *v4l2_dev);
> void omap3isp_unregister_entities(struct platform_device *pdev);
> diff --git a/drivers/media/video/isp/ispccdc.c
> b/drivers/media/video/isp/ispccdc.c
> index c3d1d7a..4244edf 100644
> --- a/drivers/media/video/isp/ispccdc.c
> +++ b/drivers/media/video/isp/ispccdc.c
> @@ -1687,8 +1687,7 @@ static int ccdc_set_stream(struct v4l2_subdev *sd,
> int enable)
> if (enable == ISP_PIPELINE_STREAM_STOPPED)
> return 0;
>
> - isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
> - ISPCTRL_CCDC_RAM_EN | ISPCTRL_CCDC_CLK_EN);
> + isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_CCDC);
> isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG,
> ISPCCDC_CFG_VDLC);
>
> @@ -1725,8 +1724,7 @@ static int ccdc_set_stream(struct v4l2_subdev *sd,
> int enable)
> ret = ispccdc_disable(ccdc);
> if (ccdc->output & CCDC_OUTPUT_MEMORY)
> isp_sbl_disable(isp, OMAP3_ISP_SBL_CCDC_WRITE);
> - isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
> - ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN);
> + isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_CCDC);
> ccdc->underrun = 0;
> break;
> }
> diff --git a/drivers/media/video/isp/isppreview.c
> b/drivers/media/video/isp/isppreview.c
> index 74e4f6a..3e55123 100644
> --- a/drivers/media/video/isp/isppreview.c
> +++ b/drivers/media/video/isp/isppreview.c
> @@ -1648,8 +1648,7 @@ static int preview_set_stream(struct v4l2_subdev
> *sd, int enable)
> if (enable == ISP_PIPELINE_STREAM_STOPPED)
> return 0;
>
> - isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
> - ISPCTRL_PREV_RAM_EN | ISPCTRL_PREV_CLK_EN);
> + isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_PREVIEW);
> preview_configure(prev);
> isppreview_print_status(prev);
> }
> @@ -1677,8 +1676,7 @@ static int preview_set_stream(struct v4l2_subdev
> *sd, int enable)
> case ISP_PIPELINE_STREAM_STOPPED:
> isp_sbl_disable(isp, OMAP3_ISP_SBL_PREVIEW_READ);
> isp_sbl_disable(isp, OMAP3_ISP_SBL_PREVIEW_WRITE);
> - isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
> - ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN);
> + isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_PREVIEW);
> prev->underrun = 0;
> break;
> }
> diff --git a/drivers/media/video/isp/ispresizer.c
> b/drivers/media/video/isp/ispresizer.c
> index 95c5895..bd33f21 100644
> --- a/drivers/media/video/isp/ispresizer.c
> +++ b/drivers/media/video/isp/ispresizer.c
> @@ -1120,8 +1120,7 @@ static int resizer_set_stream(struct v4l2_subdev
> *sd, int enable)
>
> if (enable != ISP_PIPELINE_STREAM_STOPPED &&
> res->state == ISP_PIPELINE_STREAM_STOPPED) {
> - isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
> - ISPCTRL_RSZ_CLK_EN);
> + isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_RESIZER);
> resizer_configure(res);
> ispresizer_print_status(res);
> }
> @@ -1146,8 +1145,7 @@ static int resizer_set_stream(struct v4l2_subdev
> *sd, int enable)
> case ISP_PIPELINE_STREAM_STOPPED:
> isp_sbl_disable(isp, OMAP3_ISP_SBL_RESIZER_READ |
> OMAP3_ISP_SBL_RESIZER_WRITE);
> - isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
> - ISPCTRL_RSZ_CLK_EN);
> + isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_RESIZER);
> res->underrun = 0;
> break;
> }
> --
> 1.7.0.4
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