Re: [linux-sunxi] Re: [PATCH 12/27] drm/sun4i: Add basic support for DE3

[Chen-Yu Tsai <wens@csie.org>]

On Sat, Oct 6, 2018 at 1:51 AM Jernej Škrabec <jernej.skrabec@siol.net> wrote:
>
> Dne sobota, 22. september 2018 ob 15:19:12 CEST je Chen-Yu Tsai napisal(a):
> > On Sun, Sep 2, 2018 at 3:27 PM Jernej Skrabec <jernej.skrabec@siol.net>
> wrote:
> > > Display Engine 3 is an upgrade of DE2 with new features like support for
> > > 10 bit color formats and support for AFBC.
> > >
> > > Most of DE2 code works with DE3, except some small details.
> > >
> > > Add support for it.
> > >
> > > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> > > ---
> > >
> > >  drivers/gpu/drm/sun4i/sun8i_csc.c       | 96 +++++++++++++++++++++++--
> > >  drivers/gpu/drm/sun4i/sun8i_mixer.c     | 17 ++++-
> > >  drivers/gpu/drm/sun4i/sun8i_mixer.h     | 21 +++++-
> > >  drivers/gpu/drm/sun4i/sun8i_ui_scaler.c |  8 ++-
> > >  drivers/gpu/drm/sun4i/sun8i_ui_scaler.h |  1 +
> > >  drivers/gpu/drm/sun4i/sun8i_vi_layer.c  |  8 +++
> > >  drivers/gpu/drm/sun4i/sun8i_vi_layer.h  |  2 +
> > >  drivers/gpu/drm/sun4i/sun8i_vi_scaler.c | 34 ++++++++-
> > >  drivers/gpu/drm/sun4i/sun8i_vi_scaler.h | 23 ++++++
> > >  9 files changed, 197 insertions(+), 13 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c
> > > b/drivers/gpu/drm/sun4i/sun8i_csc.c index b14925b40ccf..101901ccf2dc
> > > 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_csc.c
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
> > > @@ -34,6 +34,34 @@ static const u32 yvu2rgb[] = {
> > >
> > >         0x000004A8, 0x00000000, 0x00000813, 0xFFFBAC4A,
> > >
> > >  };
> > >
> > > +/*
> > > + * DE3 has a bit different CSC units. Factors are in two's complement
> > > format. + * First three have 17 bits for fractinal part and last two 2
> > > bits. First + * three values in each line are multiplication factor, 4th
> > > is difference, + * which is subtracted from the input value before the
> > > multiplication and + * last value is constant, which is added at the end.
> > > + *
> > > + * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0
> > > + * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1
> > > + * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2
> > > + *
> > > + * Please note that above formula is true only for Blender CSC. Other DE3
> > > CSC + * units takes only positive value for difference. From what can be
> > > deducted + * from BSP driver code, those units probably automatically
> > > assume that + * difference has to be subtracted.
> > > + */
> > > +static const u32 yuv2rgb_de3[] = {
> > > +       0x0002542a, 0x00000000, 0x0003312a, 0xffffffc0, 0x00000000,
> > > +       0x0002542a, 0xffff376b, 0xfffe5fc3, 0xfffffe00, 0x00000000,
> > > +       0x0002542a, 0x000408d3, 0x00000000, 0xfffffe00, 0x00000000,
> > > +};
> > > +
> > > +static const u32 yvu2rgb_de3[] = {
> > > +       0x0002542a, 0x0003312a, 0x00000000, 0xffffffc0, 0x00000000,
> > > +       0x0002542a, 0xfffe5fc3, 0xffff376b, 0xfffffe00, 0x00000000,
> > > +       0x0002542a, 0x00000000, 0x000408d3, 0xfffffe00, 0x00000000,
> > > +};
> > > +
> > >
> > >  static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
> > >
> > >                                        enum sun8i_csc_mode mode)
> > >
> > >  {
> > >
> > > @@ -61,6 +89,38 @@ static void sun8i_csc_set_coefficients(struct regmap
> > > *map, u32 base,>
> > >         }
> > >
> > >  }
> > >
> > > +static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int
> > > layer,
> > > +                                           enum sun8i_csc_mode mode)
> > > +{
> > > +       const u32 *table;
> > > +       int i, j;
> > > +
> > > +       switch (mode) {
> > > +       case SUN8I_CSC_MODE_YUV2RGB:
> > > +               table = yuv2rgb_de3;
> > > +               break;
> > > +       case SUN8I_CSC_MODE_YVU2RGB:
> > > +               table = yvu2rgb_de3;
> > > +               break;
> > > +       default:
> > > +               DRM_WARN("Wrong CSC mode specified.\n");
> > > +               return;
> > > +       }
> > > +
> > > +       for (i = 0; i < 3; i++) {
> > > +               for (j = 0; j < 3; j++)
> > > +                       regmap_write(map,
> > > +
> > > SUN8I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, +
> > >                                  layer, i, j), +
> > >           table[i * 5 + j]);
> >
> > Given that the first three values occupy contiguous addresses,
> > you can use regmap_bulk_write() here.
>
> Do you mind if I rework table in a way that directly fits in registers and use
> regmap_bulk_write() on whole table? This means I must combine two values into
> one for "const" register, but I would explain it better in a comment. It would
> be most elegant solution, one call to regmap_bulk_write() instead of two for
> loops and some arithmetics.

With proper comments I see no problem with it. The constants are hexidecimal
and only loaded once. It's unlikely others would use it any other way.

> I guess macro for "const" part can stay as documentation.

I agree.

>
> >
> > > +               regmap_write(map,
> > > +                            SUN8I_MIXER_BLEND_CSC_CONST(DE3_BLD_BASE,
> > > +                                                        layer, i),
> > > +                            SUN8I_MIXER_BLEND_CSC_CONST_VAL(table[i * 5 +
> > > 3], +                                                            table[i
> > > * 5 + 4]));
> > Nit: Using a two-dimension array might make it easier to read.
> >
> > > +       }
> > > +}
> > > +
> > >
> > >  static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable)
> > >  {
> > >
> > >         u32 val;
> > >
> > > @@ -73,21 +133,45 @@ static void sun8i_csc_enable(struct regmap *map, u32
> > > base, bool enable)>
> > >         regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN,
> > >         val);
> > >
> > >  }
> > >
> > > +static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool
> > > enable) +{
> > > +       u32 val, mask;
> > > +
> > > +       mask = SUN8I_MIXER_BLEND_CSC_CTL_EN(layer);
> > > +
> > > +       if (enable)
> > > +               val = mask;
> > > +       else
> > > +               val = 0;
> > > +
> > > +       regmap_update_bits(map, SUN8I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE),
> > > +                          mask, val);
> > > +}
> > > +
> > >
> > >  void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int
> > >  layer,
> > >
> > >                                      enum sun8i_csc_mode mode)
> > >
> > >  {
> > >
> > > -       u32 base;
> > > +       if (!mixer->cfg->is_de3) {
> > > +               u32 base;
> >
> > You could rewrite this as
> >
> >     if (mixer->cfg->is_de3) {
> >                sun8i_de3_ccsc_set_coefficients(mixer->engine.regs,
> >                                                layer, mode);
> >                return;
> >     }
> >
> > That way you don't need to change the indentation on the existing lines.
> > I suppose this is more of a personal preference. The downside is the control
> > flow is slightly more complicated.
> >
> > > -       base = ccsc_base[mixer->cfg->ccsc][layer];
> > > +               base = ccsc_base[mixer->cfg->ccsc][layer];
> > >
> > > -       sun8i_csc_set_coefficients(mixer->engine.regs, base, mode);
> > > +               sun8i_csc_set_coefficients(mixer->engine.regs, base,
> > > mode);
> > > +       } else {
> > > +               sun8i_de3_ccsc_set_coefficients(mixer->engine.regs,
> > > +                                               layer, mode);
> > > +       }
> > >
> > >  }
> > >
> > >  void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool
> > >  enable) {
> > >
> > > -       u32 base;
> > > +       if (!mixer->cfg->is_de3) {
> > > +               u32 base;
> > >
> > > -       base = ccsc_base[mixer->cfg->ccsc][layer];
> > > +               base = ccsc_base[mixer->cfg->ccsc][layer];
> > >
> > > -       sun8i_csc_enable(mixer->engine.regs, base, enable);
> > > +               sun8i_csc_enable(mixer->engine.regs, base, enable);
> > > +       } else {
> > > +               sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable);
> > > +       }
> > >
> > >  }
> > >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > > b/drivers/gpu/drm/sun4i/sun8i_mixer.c index 743941a33d88..a9218abf0935
> > > 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > > @@ -460,8 +460,21 @@ static int sun8i_mixer_bind(struct device *dev,
> > > struct device *master,>
> > >         base = sun8i_blender_base(mixer);
> > >
> > >         /* Reset the registers */
> > >
> > > -       for (i = 0x0; i < 0x20000; i += 4)
> > > -               regmap_write(mixer->engine.regs, i, 0);
> > > +       if (mixer->cfg->is_de3) {
> > > +               for (i = 0x0; i < 0x3000; i += 4)
> > > +                       regmap_write(mixer->engine.regs, i, 0);
> > > +               for (i = 0x20000; i < 0x40000; i += 4)
> > > +                       regmap_write(mixer->engine.regs, i, 0);
> > > +               for (i = 0x70000; i < 0x88000; i += 4)
> > > +                       regmap_write(mixer->engine.regs, i, 0);
> > > +               for (i = 0xa0000; i < 0xb0000; i += 4)
> > > +                       regmap_write(mixer->engine.regs, i, 0);
> > > +               for (i = 0xd0000; i < 0xe0000; i += 4)
> > > +                       regmap_write(mixer->engine.regs, i, 0);
> >
> > Could you use the macros *_BASE and *_SIZE here? That would make
> > it more obviously what parts you're clearing.
> >
> > The last offset, 0xd0000, isn't even defined in the DE3 spec.
> >
> > > +       } else {
> > > +               for (i = 0x0; i < 0x20000; i += 4)
> > > +                       regmap_write(mixer->engine.regs, i, 0);
> > > +       }
> > >
> > >         /* Enable the mixer */
> > >         regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_CTL,
> > >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h
> > > b/drivers/gpu/drm/sun4i/sun8i_mixer.h index 020b0a097c84..4c9a442bbb44
> > > 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> > > @@ -33,6 +33,10 @@
> > >
> > >  #define DE2_CH_BASE                            0x2000
> > >  #define DE2_CH_SIZE                            0x1000
> > >
> > > +#define DE3_BLD_BASE                           0x0800
> > > +#define DE3_CH_BASE                            0x1000
> > > +#define DE3_CH_SIZE                            0x0800
> > > +
> > >
> > >  #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))
> > >
> > > @@ -47,6 +51,11 @@
> > >
> > >  #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_CSC_CTL(base)                ((base) + 0x100)
> > > +#define SUN8I_MIXER_BLEND_CSC_COEFF(base, layer, x, y) \
> > > +       ((base) + 0x110 + (layer) * 0x30 +  (x) * 0x10 + 4 * (y))
> > > +#define SUN8I_MIXER_BLEND_CSC_CONST(base, layer, i) \
> > > +       ((base) + 0x110 + (layer) * 0x30 +  (i) * 0x10 + 0x0c)
> >
> > Should these have a DE3 prefix?
>
> How do you want this to look like?
>
> SUN50I_DE3_MIXER_BLEND_CSC_CONST?
>
> SUN8I prefix doesn't fit for DE3, but as usual, there is a chance that AW
> releases 32 bit SoC with DE3.
>
> At the end, it would be better to rename everything to have just DE2 or DE3
> prefix without mentioning any SoC family. After all, DE2 is also supported on
> sun50i family, which makes any family name in DE2/3 macros confusing...

Probably SUNXI_DEx_MIXER_foo or just DEx_MIXER_foo ...
Since it's contained in the driver I think the latter would suffice.

> Do you think I can squeeze dropping SUN8I prefix to a previous patch, where
> macros are reworked anyway?

Given there's a lot of them, and you're only changing about half of them
in that patch, I suggest you have a separate patch to do all the renaming.

ChenYu

> Best regards,
> Jernej
>
> >
> > >  #define SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK      GENMASK(12, 8)
> > >  #define SUN8I_MIXER_BLEND_PIPE_CTL_EN(pipe)    BIT(8 + pipe)
> > >
> > > @@ -61,6 +70,9 @@
> > >
> > >  #define SUN8I_MIXER_BLEND_OUTCTL_INTERLACED    BIT(1)
> > >
> > > +#define SUN8I_MIXER_BLEND_CSC_CTL_EN(ch)       BIT(ch)
> > > +#define SUN8I_MIXER_BLEND_CSC_CONST_VAL(d, c)  (((d) << 16) | ((c) &
> > > 0xffff)) +
> >
> > Same here.
> >
> > >  #define SUN8I_MIXER_FBFMT_ARGB8888     0
> > >  #define SUN8I_MIXER_FBFMT_ABGR8888     1
> > >  #define SUN8I_MIXER_FBFMT_RGBA8888     2
> >
> > [...]
> >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.h
> > > b/drivers/gpu/drm/sun4i/sun8i_vi_layer.h index 46f0237c17bb..3d0ad64178ea
> > > 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.h
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.h
> > > @@ -30,6 +30,8 @@
> > >
> > >  #define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE                BIT(15)
> > >  #define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_OFFSET    8
> > >  #define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK      GENMASK(12, 8)
> > >
> > > +#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA_MASK      GENMASK(31, 24)
> > > +#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA(x)                ((x) <<
> > > 24)
> >
> > DE3 prefix?
> >
> > >  struct sun8i_mixer;
> > >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
> > > b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c index
> > > 8697afc36023..22e1ed5cd7a4 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
> > > @@ -835,7 +835,10 @@ static const u32 bicubic4coefftab32[480] = {
> > >
> > >  static inline u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int
> > >  channel) {
> > >
> > > -       return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * channel;
> > > +       if (mixer->cfg->is_de3)
> > > +               return DE3_VI_SCALER_BASE + DE3_VI_SCALER_SIZE * channel;
> > > +       else
> > > +               return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * channel;
> > >
> > >  }
> > >
> > >  static int sun8i_vi_scaler_coef_index(unsigned int step)
> > >
> > > @@ -951,6 +954,35 @@ void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer,
> > > int layer,>
> > >                 cvphase = vphase;
> > >
> > >         }
> > >
> > > +       if (mixer->cfg->is_de3) {
> > > +               u32 val;
> > > +
> > > +               if (format->hsub == 1 && format->vsub == 1)
> > > +                       val = SUN8I_SCALER_VSU_SCALE_MODE_UI;
> > > +               else
> > > +                       val = SUN8I_SCALER_VSU_SCALE_MODE_NORMAL;
> > > +
> > > +               regmap_write(mixer->engine.regs,
> > > +                            SUN8I_SCALER_VSU_SCALE_MODE(base), val);
> >
> > The remaining settings seem to be related to the edge detection scaling
> > method. Since you aren't supporting it, are they necessary?
> >
> > > +               regmap_write(mixer->engine.regs,
> > > +                            SUN8I_SCALER_VSU_DIR_THR(base),
> > > +                            SUN8I_SCALER_VSU_SUB_ZERO_DIR_THR(0) |
> > > +                            SUN8I_SCALER_VSU_ZERO_DIR_THR(0) |
> > > +                            SUN8I_SCALER_VSU_HORZ_DIR_THR(0xff) |
> > > +                            SUN8I_SCALER_VSU_VERT_DIR_THR(1));
> > > +               regmap_write(mixer->engine.regs,
> > > +                            SUN8I_SCALER_VSU_EDGE_THR(base),
> > > +                            SUN8I_SCALER_VSU_EDGE_SHIFT(8) |
> > > +                            SUN8I_SCALER_VSU_EDGE_OFFSET(0));
> > > +               regmap_write(mixer->engine.regs,
> > > +                            SUN8I_SCALER_VSU_EDSCL_CTRL(base), 0);
> > > +               regmap_write(mixer->engine.regs,
> > > +                            SUN8I_SCALER_VSU_ANGLE_THR(base),
> > > +                            SUN8I_SCALER_VSU_ANGLE_SHIFT(2) |
> > > +                            SUN8I_SCALER_VSU_ANGLE_OFFSET(0));
> > > +       }
> > > +
> > >
> > >         regmap_write(mixer->engine.regs,
> > >
> > >                      SUN8I_SCALER_VSU_OUTSIZE(base), outsize);
> > >
> > >         regmap_write(mixer->engine.regs,
> > >
> > > diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
> > > b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h index
> > > cd015405f66d..c322f5652481 100644
> > > --- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
> > > +++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
> > > @@ -15,6 +15,9 @@
> > >
> > >  #define DE2_VI_SCALER_BASE 0x20000
> > >  #define DE2_VI_SCALER_SIZE 0x20000
> > >
> > > +#define DE3_VI_SCALER_BASE 0x20000
> > > +#define DE3_VI_SCALER_SIZE 0x08000
> > > +
> > >
> > >  /* this two macros assumes 16 fractional bits which is standard in DRM */
> > >  #define SUN8I_VI_SCALER_SCALE_MIN              1
> > >  #define SUN8I_VI_SCALER_SCALE_MAX              ((1UL << 20) - 1)
> > >
> > > @@ -25,6 +28,11 @@
> > >
> > >  #define SUN8I_VI_SCALER_SIZE(w, h)             (((h) - 1) << 16 | ((w) -
> > >  1))
> > >
> > >  #define SUN8I_SCALER_VSU_CTRL(base)            ((base) + 0x0)
> > >
> > > +#define SUN8I_SCALER_VSU_SCALE_MODE(base)      ((base) + 0x10)
> > > +#define SUN8I_SCALER_VSU_DIR_THR(base)         ((base) + 0x20)
> > > +#define SUN8I_SCALER_VSU_EDGE_THR(base)                ((base) + 0x24)
> > > +#define SUN8I_SCALER_VSU_EDSCL_CTRL(base)      ((base) + 0x28)
> > > +#define SUN8I_SCALER_VSU_ANGLE_THR(base)       ((base) + 0x2c)
> >
> > DE3 prefix for the new ones please.
> >
> > >  #define SUN8I_SCALER_VSU_OUTSIZE(base)         ((base) + 0x40)
> > >  #define SUN8I_SCALER_VSU_YINSIZE(base)         ((base) + 0x80)
> > >  #define SUN8I_SCALER_VSU_YHSTEP(base)          ((base) + 0x88)
> > >
> > > @@ -46,6 +54,21 @@
> > >
> > >  #define SUN8I_SCALER_VSU_CTRL_EN               BIT(0)
> > >  #define SUN8I_SCALER_VSU_CTRL_COEFF_RDY                BIT(4)
> > >
> > > +#define SUN8I_SCALER_VSU_SUB_ZERO_DIR_THR(x)   (((x) << 24) & 0xFF)
> > > +#define SUN8I_SCALER_VSU_ZERO_DIR_THR(x)       (((x) << 16) & 0xFF)
> > > +#define SUN8I_SCALER_VSU_HORZ_DIR_THR(x)       (((x) << 8) & 0xFF)
> > > +#define SUN8I_SCALER_VSU_VERT_DIR_THR(x)       ((x) & 0xFF)
> > > +
> > > +#define SUN8I_SCALER_VSU_SCALE_MODE_UI         0
> > > +#define SUN8I_SCALER_VSU_SCALE_MODE_NORMAL     1
> > > +#define SUN8I_SCALER_VSU_SCALE_MODE_ED_SCALE   2
> > > +
> > > +#define SUN8I_SCALER_VSU_EDGE_SHIFT(x)         (((x) << 16) & 0xF)
> > > +#define SUN8I_SCALER_VSU_EDGE_OFFSET(x)                ((x) & 0xFF)
> > > +
> > > +#define SUN8I_SCALER_VSU_ANGLE_SHIFT(x)                (((x) << 16) &
> > > 0xF)
> > > +#define SUN8I_SCALER_VSU_ANGLE_OFFSET(x)       ((x) & 0xFF)
> > > +
> >
> > Same here.
> >
> > Regards
> > ChenYu
> >
> > >  void sun8i_vi_scaler_enable(struct sun8i_mixer *mixer, int layer, bool
> > >  enable); void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int
> > >  layer,
> > >
> > >                            u32 src_w, u32 src_h, u32 dst_w, u32 dst_h,
> > >
> > > --
> > > 2.18.0
>
>
>
>
> --
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