[PATCH 2/3] media: rockchip: rkisp1: Mask invalid bits in DPCC parameters
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Sat Jul 16 04:47:45 PDT 2022
Hi Dafna,
On Sat, Jul 16, 2022 at 08:56:48AM +0300, Dafna Hirschfeld wrote:
> On 16.06.2022 19:04, 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 at ideasonboard.com>
> > ---
> > .../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)
>
> Why are these two masks use GENMASK and other don't?
Good question. Probably because the above two are new and I didn't think
about changing the other ones.
For RKISP1_CIF_ISP_DPCC_METHODS_SET_MASK, would you rather keep
#define RKISP1_CIF_ISP_DPCC_METHODS_SET_MASK 0x00001f1f
or have
#define RKISP1_CIF_ISP_DPCC_METHODS_SET_MASK (GENMASK(12 ,8) | GENMASK(4, 0))
? I think the former is easier to read and match against datasheets, but
I don't mind much either way.
> Reviewed-by: Dafna Hirschfeld <dafna at fastmail.com>
>
> > +#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 */
--
Regards,
Laurent Pinchart
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