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SubjectRe: [linux-sunxi] [PATCH 11/27] drm/sun4i: Rework DE2 register defines
Hi,

On Sun, Sep 2, 2018 at 3:27 PM Jernej Skrabec <jernej.skrabec@siol.net> wrote:
>
> Most, if not all, registers found in DE2 still exists in DE3. However,
> units are on different base addresses.
>
> To prepare for addition of DE3 support, registers macros are reworked so
> they take base address as parameter.
>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> [rebased]
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

This patch mostly checks out. But see below.


> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> index 406c42e752d7..020b0a097c84 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> @@ -29,20 +29,24 @@
>
> #define SUN8I_MIXER_GLOBAL_DBUFF_ENABLE BIT(0)
>
> -#define SUN8I_MIXER_BLEND_PIPE_CTL 0x1000
> -#define SUN8I_MIXER_BLEND_ATTR_FCOLOR(x) (0x1004 + 0x10 * (x) + 0x0)
> -#define SUN8I_MIXER_BLEND_ATTR_INSIZE(x) (0x1004 + 0x10 * (x) + 0x4)
> -#define SUN8I_MIXER_BLEND_ATTR_COORD(x) (0x1004 + 0x10 * (x) + 0x8)
> -#define SUN8I_MIXER_BLEND_ROUTE 0x1080
> -#define SUN8I_MIXER_BLEND_PREMULTIPLY 0x1084
> -#define SUN8I_MIXER_BLEND_BKCOLOR 0x1088
> -#define SUN8I_MIXER_BLEND_OUTSIZE 0x108c
> -#define SUN8I_MIXER_BLEND_MODE(x) (0x1090 + 0x04 * (x))
> -#define SUN8I_MIXER_BLEND_CK_CTL 0x10b0
> -#define SUN8I_MIXER_BLEND_CK_CFG 0x10b4
> -#define SUN8I_MIXER_BLEND_CK_MAX(x) (0x10c0 + 0x04 * (x))
> -#define SUN8I_MIXER_BLEND_CK_MIN(x) (0x10e0 + 0x04 * (x))
> -#define SUN8I_MIXER_BLEND_OUTCTL 0x10fc
> +#define DE2_BLD_BASE 0x1000
> +#define DE2_CH_BASE 0x2000
> +#define DE2_CH_SIZE 0x1000
> +
> +#define SUN8I_MIXER_BLEND_PIPE_CTL(base) ((base) + 0)
> +#define SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, x) ((base) + 0x4 + 0x10 * (x))
> +#define SUN8I_MIXER_BLEND_ATTR_INSIZE(base, x) ((base) + 0x8 + 0x10 * (x))
> +#define SUN8I_MIXER_BLEND_ATTR_COORD(base, x) ((base) + 0xC + 0x10 * (x))

Nit: Use lowercase for '0xC' to be consistent.

> +#define SUN8I_MIXER_BLEND_ROUTE(base) ((base) + 0x80)
> +#define SUN8I_MIXER_BLEND_PREMULTIPLY(base) ((base) + 0x84)
> +#define SUN8I_MIXER_BLEND_BKCOLOR(base) ((base) + 0x88)
> +#define SUN8I_MIXER_BLEND_OUTSIZE(base) ((base) + 0x8c)
> +#define SUN8I_MIXER_BLEND_MODE(base, x) ((base) + 0x90 + 0x04 * (x))
> +#define SUN8I_MIXER_BLEND_CK_CTL(base) ((base) + 0xb0)
> +#define SUN8I_MIXER_BLEND_CK_CFG(base) ((base) + 0xb4)
> +#define SUN8I_MIXER_BLEND_CK_MAX(base, x) ((base) + 0xc0 + 0x04 * (x))
> +#define SUN8I_MIXER_BLEND_CK_MIN(base, x) ((base) + 0xe0 + 0x04 * (x))
> +#define SUN8I_MIXER_BLEND_OUTCTL(base) ((base) + 0xfc)
>
> #define SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK GENMASK(12, 8)
> #define SUN8I_MIXER_BLEND_PIPE_CTL_EN(pipe) BIT(8 + pipe)

[...]

> diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
> index 6bb2aa164c8e..c68eab8a748f 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
> @@ -10,6 +10,7 @@
> */
>
> #include "sun8i_ui_scaler.h"
> +#include "sun8i_vi_scaler.h"
>
> static const u32 lan2coefftab16[240] = {
> 0x00004000, 0x00033ffe, 0x00063efc, 0x000a3bfb,
> @@ -88,6 +89,14 @@ static const u32 lan2coefftab16[240] = {
> 0x0b1c1603, 0x0d1c1502, 0x0e1d1401, 0x0f1d1301,
> };
>
> +static inline u32 sun8i_ui_scaler_base(struct sun8i_mixer *mixer, int channel)

I recently saw a review comment stating one should not inline functions
unless they are defined in header files. Otherwise the decision should
be left up to the compiler.

> +{
> + int vi_num = mixer->cfg->vi_num;
> +
> + return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * vi_num +
> + DE2_UI_SCALER_SIZE * (channel - vi_num);
> +}
> +
> static int sun8i_ui_scaler_coef_index(unsigned int step)
> {
> unsigned int scale, int_part, float_part;

[...]

> diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
> index d3f1acb234b7..8697afc36023 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
> @@ -833,6 +833,11 @@ static const u32 bicubic4coefftab32[480] = {
> 0x1012110d, 0x1012110d, 0x1013110c, 0x1013110c,
> };
>
> +static inline u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int channel)
> +{
> + return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * channel;
> +}
> +

This one as well.

> static int sun8i_vi_scaler_coef_index(unsigned int step)
> {
> unsigned int scale, int_part, float_part;
> @@ -857,7 +862,7 @@ static int sun8i_vi_scaler_coef_index(unsigned int step)
> }
> }
>
> -static void sun8i_vi_scaler_set_coeff(struct regmap *map, int layer,
> +static void sun8i_vi_scaler_set_coeff(struct regmap *map, u32 base,
> u32 hstep, u32 vstep,
> const struct drm_format_info *format)

This is the only instance where a function's "layer" parameter was changed
to "base". It would be nice if it were consistent.

ChenYu

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