Hi Laurent,
On Thu, Jun 16, 2022 at 07:04:55PM +0300, Laurent Pinchart wrote:
> Restrict the DPCC configuration that can be set by userspace to valid
> register bits. To do so, reorganize the related register macros to
> define valid bitmasks, as well as bits of the DPCC mode register.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Paul Elder <paul.elder@xxxxxxxxxxxxxxxx>
> ---
> .../platform/rockchip/rkisp1/rkisp1-params.c | 44 ++++++++++++-------
> .../platform/rockchip/rkisp1/rkisp1-regs.h | 26 +++++------
> 2 files changed, 41 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> index 140012fa18f0..94e834cd2a21 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> @@ -58,35 +58,47 @@ static void rkisp1_dpcc_config(struct rkisp1_params *params,
> unsigned int i;
> u32 mode;
>
> - /* avoid to override the old enable value */
> + /*
> + * The enable bit is controlled in rkisp1_isp_isr_other_config() and
> + * must be preserved. The grayscale mode should be configured
> + * automatically based on the media bus code on the ISP sink pad, so
> + * only the STAGE1_ENABLE bit can be set by userspace.
> + */
> mode = rkisp1_read(params->rkisp1, RKISP1_CIF_ISP_DPCC_MODE);
> - mode &= RKISP1_CIF_ISP_DPCC_ENA;
> - mode |= arg->mode & ~RKISP1_CIF_ISP_DPCC_ENA;
> + mode &= RKISP1_CIF_ISP_DPCC_MODE_DPCC_ENABLE;
> + mode |= arg->mode & RKISP1_CIF_ISP_DPCC_MODE_STAGE1_ENABLE;
> rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_MODE, mode);
> +
> rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_OUTPUT_MODE,
> - arg->output_mode);
> + arg->output_mode & RKISP1_CIF_ISP_DPCC_OUTPUT_MODE_MASK);
> rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_SET_USE,
> - arg->set_use);
> + arg->set_use & RKISP1_CIF_ISP_DPCC_SET_USE_MASK);
>
> for (i = 0; i < RKISP1_CIF_ISP_DPCC_METHODS_MAX; i++) {
> rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_METHODS_SET(i),
> - arg->methods[i].method);
> + arg->methods[i].method &
> + RKISP1_CIF_ISP_DPCC_METHODS_SET_MASK);
> rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_LINE_THRESH(i),
> - arg->methods[i].line_thresh);
> + arg->methods[i].line_thresh &
> + RKISP1_CIF_ISP_DPCC_LINE_THRESH_MASK);
> rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_LINE_MAD_FAC(i),
> - arg->methods[i].line_mad_fac);
> + arg->methods[i].line_mad_fac &
> + RKISP1_CIF_ISP_DPCC_LINE_MAD_FAC_MASK);
> rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_PG_FAC(i),
> - arg->methods[i].pg_fac);
> + arg->methods[i].pg_fac &
> + RKISP1_CIF_ISP_DPCC_PG_FAC_MASK);
> rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_RND_THRESH(i),
> - arg->methods[i].rnd_thresh);
> + arg->methods[i].rnd_thresh &
> + RKISP1_CIF_ISP_DPCC_RND_THRESH_MASK);
> rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_RG_FAC(i),
> - arg->methods[i].rg_fac);
> + arg->methods[i].rg_fac &
> + RKISP1_CIF_ISP_DPCC_RG_FAC_MASK);
> }
>
> rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_RND_OFFS,
> - arg->rnd_offs);
> + arg->rnd_offs & RKISP1_CIF_ISP_DPCC_RND_OFFS_MASK);
> rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_RO_LIMITS,
> - arg->ro_limits);
> + arg->ro_limits & RKISP1_CIF_ISP_DPCC_RO_LIMIT_MASK);
> }
>
> /* ISP black level subtraction interface function */
> @@ -1214,11 +1226,11 @@ rkisp1_isp_isr_other_config(struct rkisp1_params *params,
> if (module_ens & RKISP1_CIF_ISP_MODULE_DPCC)
> rkisp1_param_set_bits(params,
> RKISP1_CIF_ISP_DPCC_MODE,
> - RKISP1_CIF_ISP_DPCC_ENA);
> + RKISP1_CIF_ISP_DPCC_MODE_DPCC_ENABLE);
> else
> rkisp1_param_clear_bits(params,
> RKISP1_CIF_ISP_DPCC_MODE,
> - RKISP1_CIF_ISP_DPCC_ENA);
> + RKISP1_CIF_ISP_DPCC_MODE_DPCC_ENABLE);
> }
>
> /* update bls config */
> @@ -1580,7 +1592,7 @@ void rkisp1_params_configure(struct rkisp1_params *params,
> void rkisp1_params_disable(struct rkisp1_params *params)
> {
> rkisp1_param_clear_bits(params, RKISP1_CIF_ISP_DPCC_MODE,
> - RKISP1_CIF_ISP_DPCC_ENA);
> + RKISP1_CIF_ISP_DPCC_MODE_DPCC_ENABLE);
> rkisp1_param_clear_bits(params, RKISP1_CIF_ISP_LSC_CTRL,
> RKISP1_CIF_ISP_LSC_CTRL_ENA);
> rkisp1_param_clear_bits(params, RKISP1_CIF_ISP_BLS_CTRL,
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
> index dd3e6c38be67..dc01f968c19d 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
> @@ -618,19 +618,19 @@
> #define RKISP1_CIF_ISP_CTRL_ISP_GAMMA_OUT_ENA_READ(x) (((x) >> 11) & 1)
>
> /* DPCC */
> -/* ISP_DPCC_MODE */
> -#define RKISP1_CIF_ISP_DPCC_ENA BIT(0)
> -#define RKISP1_CIF_ISP_DPCC_MODE_MAX 0x07
> -#define RKISP1_CIF_ISP_DPCC_OUTPUTMODE_MAX 0x0F
> -#define RKISP1_CIF_ISP_DPCC_SETUSE_MAX 0x0F
> -#define RKISP1_CIF_ISP_DPCC_METHODS_SET_RESERVED 0xFFFFE000
> -#define RKISP1_CIF_ISP_DPCC_LINE_THRESH_RESERVED 0xFFFF0000
> -#define RKISP1_CIF_ISP_DPCC_LINE_MAD_FAC_RESERVED 0xFFFFC0C0
> -#define RKISP1_CIF_ISP_DPCC_PG_FAC_RESERVED 0xFFFFC0C0
> -#define RKISP1_CIF_ISP_DPCC_RND_THRESH_RESERVED 0xFFFF0000
> -#define RKISP1_CIF_ISP_DPCC_RG_FAC_RESERVED 0xFFFFC0C0
> -#define RKISP1_CIF_ISP_DPCC_RO_LIMIT_RESERVED 0xFFFFF000
> -#define RKISP1_CIF_ISP_DPCC_RND_OFFS_RESERVED 0xFFFFF000
> +#define RKISP1_CIF_ISP_DPCC_MODE_DPCC_ENABLE BIT(0)
> +#define RKISP1_CIF_ISP_DPCC_MODE_GRAYSCALE_MODE BIT(1)
> +#define RKISP1_CIF_ISP_DPCC_MODE_STAGE1_ENABLE BIT(2)
> +#define RKISP1_CIF_ISP_DPCC_OUTPUT_MODE_MASK GENMASK(3, 0)
> +#define RKISP1_CIF_ISP_DPCC_SET_USE_MASK GENMASK(3, 0)
> +#define RKISP1_CIF_ISP_DPCC_METHODS_SET_MASK 0x00001f1f
> +#define RKISP1_CIF_ISP_DPCC_LINE_THRESH_MASK 0x0000ffff
> +#define RKISP1_CIF_ISP_DPCC_LINE_MAD_FAC_MASK 0x00003f3f
> +#define RKISP1_CIF_ISP_DPCC_PG_FAC_MASK 0x00003f3f
> +#define RKISP1_CIF_ISP_DPCC_RND_THRESH_MASK 0x0000ffff
> +#define RKISP1_CIF_ISP_DPCC_RG_FAC_MASK 0x00003f3f
> +#define RKISP1_CIF_ISP_DPCC_RO_LIMIT_MASK 0x00000fff
> +#define RKISP1_CIF_ISP_DPCC_RND_OFFS_MASK 0x00000fff
>
> /* BLS */
> /* ISP_BLS_CTRL */
