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Message-ID: <20210412094312.tsghnyhglxf3roiy@uno.localdomain>
Date: Mon, 12 Apr 2021 11:43:12 +0200
From: Jacopo Mondi <jacopo@...ndi.org>
To: Eugen Hristev <eugen.hristev@...rochip.com>
Cc: devicetree@...r.kernel.org, linux-media@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 04/30] media: atmel: atmel-isc: specialize max width
and max height
Hi Eugene,
On Mon, Apr 05, 2021 at 06:50:39PM +0300, Eugen Hristev wrote:
> Move the max width and max height constants to the product specific driver
> and have them in the device struct.
>
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
> ---
> drivers/media/platform/atmel/atmel-isc-base.c | 28 +++++++++----------
> drivers/media/platform/atmel/atmel-isc.h | 9 ++++--
> .../media/platform/atmel/atmel-sama5d2-isc.c | 7 +++--
> 3 files changed, 25 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
> index 45fc8dbb7943..350076dd029a 100644
> --- a/drivers/media/platform/atmel/atmel-isc-base.c
> +++ b/drivers/media/platform/atmel/atmel-isc-base.c
> @@ -1204,8 +1204,8 @@ static void isc_try_fse(struct isc_device *isc,
> * just use the maximum ISC can receive.
> */
> if (ret) {
> - pad_cfg->try_crop.width = ISC_MAX_SUPPORT_WIDTH;
> - pad_cfg->try_crop.height = ISC_MAX_SUPPORT_HEIGHT;
> + pad_cfg->try_crop.width = isc->max_width;
> + pad_cfg->try_crop.height = isc->max_height;
> } else {
> pad_cfg->try_crop.width = fse.max_width;
> pad_cfg->try_crop.height = fse.max_height;
> @@ -1282,10 +1282,10 @@ static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
> isc->try_config.sd_format = sd_fmt;
>
> /* Limit to Atmel ISC hardware capabilities */
> - if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
> - pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
> - if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
> - pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
> + if (pixfmt->width > isc->max_width)
> + pixfmt->width = isc->max_width;
> + if (pixfmt->height > isc->max_height)
> + pixfmt->height = isc->max_height;
>
> /*
> * The mbus format is the one the subdev outputs.
> @@ -1327,10 +1327,10 @@ static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
> v4l2_fill_pix_format(pixfmt, &format.format);
>
> /* Limit to Atmel ISC hardware capabilities */
> - if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
> - pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
> - if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
> - pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
> + if (pixfmt->width > isc->max_width)
> + pixfmt->width = isc->max_width;
> + if (pixfmt->height > isc->max_height)
> + pixfmt->height = isc->max_height;
What happens if the sensor sends a frame larger that the ISC max
supported sizes ?
>
> pixfmt->field = V4L2_FIELD_NONE;
> pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3;
> @@ -1368,10 +1368,10 @@ static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
> return ret;
>
> /* Limit to Atmel ISC hardware capabilities */
> - if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
> - pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
> - if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
> - pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
> + if (f->fmt.pix.width > isc->max_width)
> + f->fmt.pix.width = isc->max_width;
> + if (f->fmt.pix.height > isc->max_height)
> + f->fmt.pix.height = isc->max_height;
>
> isc->fmt = *f;
>
> diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
> index 8d81d9967ad2..6becc6c3aaf0 100644
> --- a/drivers/media/platform/atmel/atmel-isc.h
> +++ b/drivers/media/platform/atmel/atmel-isc.h
> @@ -10,9 +10,6 @@
> */
> #ifndef _ATMEL_ISC_H_
>
> -#define ISC_MAX_SUPPORT_WIDTH 2592
> -#define ISC_MAX_SUPPORT_HEIGHT 1944
> -
> #define ISC_CLK_MAX_DIV 255
>
> enum isc_clk_id {
> @@ -191,6 +188,9 @@ struct isc_ctrls {
> * @gamma_table: pointer to the table with gamma values, has
> * gamma_max sets of GAMMA_ENTRIES entries each
> * @gamma_max: maximum number of sets of inside the gamma_table
> + *
> + * @max_width: maximum frame width, dependent on the internal RAM
> + * @max_height: maximum frame height, dependent on the internal RAM
> */
> struct isc_device {
> struct regmap *regmap;
> @@ -254,6 +254,9 @@ struct isc_device {
> /* pointer to the defined gamma table */
> const u32 (*gamma_table)[GAMMA_ENTRIES];
> u32 gamma_max;
> +
> + u32 max_width;
> + u32 max_height;
> };
>
> extern struct isc_format formats_list[];
> diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> index f45d8b96bfb8..f8d1c8ba99b3 100644
> --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> @@ -49,8 +49,8 @@
> #include "atmel-isc-regs.h"
> #include "atmel-isc.h"
>
> -#define ISC_MAX_SUPPORT_WIDTH 2592
> -#define ISC_MAX_SUPPORT_HEIGHT 1944
> +#define ISC_SAMA5D2_MAX_SUPPORT_WIDTH 2592
> +#define ISC_SAMA5D2_MAX_SUPPORT_HEIGHT 1944
>
> #define ISC_CLK_MAX_DIV 255
>
> @@ -195,6 +195,9 @@ static int atmel_isc_probe(struct platform_device *pdev)
> isc->gamma_table = isc_sama5d2_gamma_table;
> isc->gamma_max = 2;
>
> + isc->max_width = ISC_SAMA5D2_MAX_SUPPORT_WIDTH;
> + isc->max_height = ISC_SAMA5D2_MAX_SUPPORT_HEIGHT;
> +
> ret = isc_pipeline_init(isc);
> if (ret)
> return ret;
> --
> 2.25.1
>
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