Hi,

Dne petek, 01. december 2017 07.07.08 UTC+1 je oseba Jernej Skrabec 
napisala:
>
> Scaling is currently supported only for RGB framebuffers 
>
> Coefficients and algorithm which coefficients to select are taken 
> from BSP driver. 
>
> Signed-off-by: Jernej Skrabec <[email protected] <javascript:>> 
> --- 
>  drivers/gpu/drm/sun4i/Makefile          |   3 +- 
>  drivers/gpu/drm/sun4i/sun8i_mixer.h     |   4 - 
>  drivers/gpu/drm/sun4i/sun8i_ui_layer.c  |  73 +++-- 
>  drivers/gpu/drm/sun4i/sun8i_ui_scaler.c | 172 ++++++++++ 
>  drivers/gpu/drm/sun4i/sun8i_ui_scaler.h |  49 +++ 
>  drivers/gpu/drm/sun4i/sun8i_vi_layer.c  |  62 +++- 
>  drivers/gpu/drm/sun4i/sun8i_vi_scaler.c | 535 
> ++++++++++++++++++++++++++++++++ 
>  drivers/gpu/drm/sun4i/sun8i_vi_scaler.h |  56 ++++ 
>  8 files changed, 915 insertions(+), 39 deletions(-) 
>  create mode 100644 drivers/gpu/drm/sun4i/sun8i_ui_scaler.c 
>  create mode 100644 drivers/gpu/drm/sun4i/sun8i_ui_scaler.h 
>  create mode 100644 drivers/gpu/drm/sun4i/sun8i_vi_scaler.c 
>  create mode 100644 drivers/gpu/drm/sun4i/sun8i_vi_scaler.h 
>
> diff --git a/drivers/gpu/drm/sun4i/Makefile 
> b/drivers/gpu/drm/sun4i/Makefile 
> index b0a2eb2c4806..a458ddbf4a8e 100644 
> --- a/drivers/gpu/drm/sun4i/Makefile 
> +++ b/drivers/gpu/drm/sun4i/Makefile 
> @@ -10,7 +10,8 @@ sun4i-drm-hdmi-y                += sun4i_hdmi_i2c.o 
>  sun4i-drm-hdmi-y                += sun4i_hdmi_tmds_clk.o 
>   
>  sun8i-mixer-y                        += sun8i_mixer.o sun8i_ui_layer.o \ 
> -                                   sun8i_vi_layer.o 
> +                                   sun8i_vi_layer.o sun8i_ui_scaler.o \ 
> +                                   sun8i_vi_scaler.o 
>   
>  sun4i-tcon-y                        += sun4i_crtc.o 
>  sun4i-tcon-y                        += sun4i_dotclock.o 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h 
> b/drivers/gpu/drm/sun4i/sun8i_mixer.h 
> index a6270b307ae5..9bbd762d26f7 100644 
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.h 
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h 
> @@ -77,10 +77,6 @@ 
>   * These sub-engines are still unknown now, the EN registers are here 
> only to 
>   * be used to disable these sub-engines. 
>   */ 
> -#define SUN8I_MIXER_VSU_EN                        0x20000 
> -#define SUN8I_MIXER_GSU1_EN                        0x30000 
> -#define SUN8I_MIXER_GSU2_EN                        0x40000 
> -#define SUN8I_MIXER_GSU3_EN                        0x50000 
>  #define SUN8I_MIXER_FCE_EN                        0xa0000 
>  #define SUN8I_MIXER_BWS_EN                        0xa2000 
>  #define SUN8I_MIXER_LTI_EN                        0xa4000 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c 
> b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c 
> index 3ecf39c50111..3cf0729cc7e9 100644 
> --- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c 
> +++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c 
> @@ -24,6 +24,7 @@ 
>   
>  #include "sun8i_ui_layer.h" 
>  #include "sun8i_mixer.h" 
> +#include "sun8i_ui_scaler.h" 
>   
>  static void sun8i_ui_layer_enable(struct sun8i_mixer *mixer, int channel, 
>                                    int overlay, bool enable) 
> @@ -56,29 +57,35 @@ static int sun8i_ui_layer_update_coord(struct 
> sun8i_mixer *mixer, int channel, 
>                                         int overlay, struct drm_plane 
> *plane) 
>  { 
>          struct drm_plane_state *state = plane->state; 
> -        u32 width, height, size; 
> +        u32 src_w, src_h, dst_w, dst_h; 
> +        u32 outsize, insize; 
> +        u32 hphase, vphase; 
>   
> -        DRM_DEBUG_DRIVER("Updating channel %d overlay %d\n", channel, 
> overlay); 
> +        DRM_DEBUG_DRIVER("Updating UI channel %d overlay %d\n", 
> +                         channel, overlay); 
>   
> -        /* 
> -         * Same source and destination width and height are guaranteed 
> -         * by atomic check function. 
> -         */ 
> -        width = drm_rect_width(&state->dst); 
> -        height = drm_rect_height(&state->dst); 
> -        size = SUN8I_MIXER_SIZE(width, height); 
> +        src_w = drm_rect_width(&state->src) >> 16; 
> +        src_h = drm_rect_height(&state->src) >> 16; 
> +        dst_w = drm_rect_width(&state->dst); 
> +        dst_h = drm_rect_height(&state->dst); 
> + 
> +        hphase = state->src.x1 & 0xffff; 
> +        vphase = state->src.y1 & 0xffff; 
> + 
> +        insize = SUN8I_MIXER_SIZE(src_w, src_h); 
> +        outsize = SUN8I_MIXER_SIZE(dst_w, dst_h); 
>   
>          if (plane->type == DRM_PLANE_TYPE_PRIMARY) { 
>                  bool interlaced = false; 
>                  u32 val; 
>   
>                  DRM_DEBUG_DRIVER("Primary layer, updating global size W: 
> %u H: %u\n", 
> -                                 width, height); 
> +                                 dst_w, dst_h); 
>                  regmap_write(mixer->engine.regs, 
>                               SUN8I_MIXER_GLOBAL_SIZE, 
> -                             size); 
> +                             outsize); 
>                  regmap_write(mixer->engine.regs, 
> SUN8I_MIXER_BLEND_OUTSIZE, 
> -                             size); 
> +                             outsize); 
>   
>                  if (state->crtc) 
>                          interlaced = 
> state->crtc->state->adjusted_mode.flags 
> @@ -99,23 +106,42 @@ static int sun8i_ui_layer_update_coord(struct 
> sun8i_mixer *mixer, int channel, 
>          } 
>   
>          /* Set height and width */ 
> -        DRM_DEBUG_DRIVER("Layer size W: %u H: %u\n", width, height); 
> +        DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n", 
> +                         state->src.x1 >> 16, state->src.y1 >> 16); 
> +        DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, 
> src_h); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_CHAN_UI_LAYER_SIZE(channel, overlay), 
> -                     size); 
> +                     insize); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_CHAN_UI_OVL_SIZE(channel), 
> -                     size); 
> +                     insize); 
> + 
> +        if (insize != outsize || hphase || vphase) { 
> +                u32 hscale, vscale; 
> + 
> +                DRM_DEBUG_DRIVER("HW scaling is enabled\n"); 
> + 
> +                hscale = state->src_w / state->crtc_w; 
> +                vscale = state->src_h / state->crtc_h; 
> + 
> +                sun8i_ui_scaler_setup(mixer, channel, src_w, src_h, 
> dst_w, 
> +                                      dst_h, hscale, vscale, hphase, 
> vphase); 
> +                sun8i_ui_scaler_enable(mixer, channel, true); 
> +        } else { 
> +                DRM_DEBUG_DRIVER("HW scaling is not needed\n"); 
> +                sun8i_ui_scaler_enable(mixer, channel, false); 
> +        } 
>   
>          /* Set base coordinates */ 
> -        DRM_DEBUG_DRIVER("Layer coordinates X: %d Y: %d\n", 
> +        DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n", 
>                           state->dst.x1, state->dst.y1); 
> +        DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, 
> dst_h); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_BLEND_ATTR_COORD(channel), 
>                       SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1)); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_BLEND_ATTR_INSIZE(channel), 
> -                     size); 
> +                     outsize); 
>   
>          return 0; 
>  } 
> @@ -181,8 +207,10 @@ static int sun8i_ui_layer_update_buffer(struct 
> sun8i_mixer *mixer, int channel, 
>  static int sun8i_ui_layer_atomic_check(struct drm_plane *plane, 
>                                         struct drm_plane_state *state) 
>  { 
> +        struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane); 
>          struct drm_crtc *crtc = state->crtc; 
>          struct drm_crtc_state *crtc_state; 
> +        int min_scale, max_scale; 
>          struct drm_rect clip; 
>   
>          if (!crtc) 
> @@ -197,9 +225,16 @@ static int sun8i_ui_layer_atomic_check(struct 
> drm_plane *plane, 
>          clip.x2 = crtc_state->adjusted_mode.hdisplay; 
>          clip.y2 = crtc_state->adjusted_mode.vdisplay; 
>   
> +        min_scale = DRM_PLANE_HELPER_NO_SCALING; 
> +        max_scale = DRM_PLANE_HELPER_NO_SCALING; 
> + 
> +        if (layer->mixer->cfg->scaler_mask & BIT(layer->channel)) { 
> +                min_scale = SUN8I_UI_SCALER_SCALE_MIN; 
> +                max_scale = SUN8I_UI_SCALER_SCALE_MAX; 
> +        } 
> + 
>          return drm_plane_helper_check_state(state, &clip, 
> -                                            DRM_PLANE_HELPER_NO_SCALING, 
> -                                            DRM_PLANE_HELPER_NO_SCALING, 
> +                                            min_scale, max_scale, 
>                                              true, true); 
>  } 
>   
> diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c 
> b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c 
> new file mode 100644 
> index 000000000000..6bb2aa164c8e 
> --- /dev/null 
> +++ b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c 
> @@ -0,0 +1,172 @@ 
> +/* 
> + * Copyright (C) 2017 Jernej Skrabec <[email protected] <javascript:>> 
> + * 
> + * Coefficients are taken from BSP driver, which is: 
> + * Copyright (C) 2014-2015 Allwinner 
> + * 
> + * This file is licensed under the terms of the GNU General Public 
> + * License version 2.  This program is licensed "as is" without any 
> + * warranty of any kind, whether express or implied. 
> + */ 
> + 
> +#include "sun8i_ui_scaler.h" 
> + 
> +static const u32 lan2coefftab16[240] = { 
> +        0x00004000, 0x00033ffe, 0x00063efc, 0x000a3bfb, 
> +        0xff0f37fb, 0xfe1433fb, 0xfd192ffb, 0xfd1f29fb, 
> +        0xfc2424fc, 0xfb291ffd, 0xfb2f19fd, 0xfb3314fe, 
> +        0xfb370fff, 0xfb3b0a00, 0xfc3e0600, 0xfe3f0300, 
> + 
> +        0xff053804, 0xff083801, 0xff0a3700, 0xff0e34ff, 
> +        0xff1232fd, 0xfe162ffd, 0xfd1b2cfc, 0xfd1f28fc, 
> +        0xfd2323fd, 0xfc281ffd, 0xfc2c1bfd, 0xfd2f16fe, 
> +        0xfd3212ff, 0xff340eff, 0x00360a00, 0x02370700, 
> + 
> +        0xff083207, 0xff0a3205, 0xff0d3103, 0xfe113001, 
> +        0xfe142e00, 0xfe182bff, 0xfe1b29fe, 0xfe1f25fe, 
> +        0xfe2222fe, 0xfe251ffe, 0xfe291bfe, 0xff2b18fe, 
> +        0x002e14fe, 0x013010ff, 0x03310dff, 0x05310a00, 
> + 
> +        0xff0a2e09, 0xff0c2e07, 0xff0f2d05, 0xff122c03, 
> +        0xfe152b02, 0xfe182901, 0xfe1b2700, 0xff1e24ff, 
> +        0xff2121ff, 0xff241eff, 0x00261bff, 0x012818ff, 
> +        0x022a15ff, 0x032c12ff, 0x052d0fff, 0x072d0c00, 
> + 
> +        0xff0c2a0b, 0xff0e2a09, 0xff102a07, 0xff132905, 
> +        0xff162803, 0xff182702, 0xff1b2501, 0xff1e2300, 
> +        0x00202000, 0x01221d00, 0x01251bff, 0x032618ff, 
> +        0x042815ff, 0x052913ff, 0x072a10ff, 0x092a0d00, 
> + 
> +        0xff0d280c, 0xff0f280a, 0xff112808, 0xff142706, 
> +        0xff162605, 0xff192503, 0x001b2302, 0x001d2201, 
> +        0x011f1f01, 0x01221d00, 0x02231b00, 0x04241800, 
> +        0x052616ff, 0x072713ff, 0x08271100, 0x0a280e00, 
> + 
> +        0xff0e260d, 0xff10260b, 0xff122609, 0xff142508, 
> +        0x00152506, 0x00182305, 0x001b2203, 0x011d2002, 
> +        0x011f1f01, 0x02201d01, 0x03221b00, 0x04231801, 
> +        0x06241600, 0x08251300, 0x09261100, 0x0b260f00, 
> + 
> +        0xff0e250e, 0xff10250c, 0x0011250a, 0x00142408, 
> +        0x00162307, 0x00182206, 0x011a2104, 0x011c2003, 
> +        0x021e1e02, 0x03201c01, 0x04211a01, 0x05221801, 
> +        0x07231600, 0x08241400, 0x0a241200, 0x0c241000, 
> + 
> +        0x000e240e, 0x0010240c, 0x0013230a, 0x00142309, 
> +        0x00162208, 0x01182106, 0x011a2005, 0x021b1f04, 
> +        0x031d1d03, 0x041e1c02, 0x05201a01, 0x06211801, 
> +        0x07221601, 0x09231400, 0x0a231300, 0x0c231100, 
> + 
> +        0x000f220f, 0x0011220d, 0x0013220b, 0x0015210a, 
> +        0x01162108, 0x01182007, 0x02191f06, 0x031a1e05, 
> +        0x041c1c04, 0x051d1b03, 0x061f1902, 0x07201801, 
> +        0x08211601, 0x0a211500, 0x0b221300, 0x0d221100, 
> + 
> +        0x0010210f, 0x0011210e, 0x0013210c, 0x0114200b, 
> +        0x01161f0a, 0x02171f08, 0x03181e07, 0x031a1d06, 
> +        0x041c1c04, 0x051d1a04, 0x071d1903, 0x081e1802, 
> +        0x091f1602, 0x0b1f1501, 0x0c211300, 0x0e201200, 
> + 
> +        0x00102010, 0x0012200e, 0x0013200d, 0x01151f0b, 
> +        0x01161f0a, 0x02171e09, 0x03191d07, 0x041a1c06, 
> +        0x051b1b05, 0x061c1a04, 0x071d1903, 0x081e1703, 
> +        0x0a1f1601, 0x0b1f1501, 0x0d201300, 0x0e201200, 
> + 
> +        0x00102010, 0x00121f0f, 0x00141f0d, 0x01141f0c, 
> +        0x02161e0a, 0x03171d09, 0x03181d08, 0x041a1c06, 
> +        0x051b1b05, 0x061c1a04, 0x081c1903, 0x091d1703, 
> +        0x0a1e1602, 0x0c1e1501, 0x0d1f1400, 0x0e1f1201, 
> + 
> +        0x00111e11, 0x00131e0f, 0x01131e0e, 0x02151d0c, 
> +        0x02161d0b, 0x03171c0a, 0x04181b09, 0x05191b07, 
> +        0x061a1a06, 0x071b1905, 0x091b1804, 0x0a1c1703, 
> +        0x0b1d1602, 0x0c1d1502, 0x0e1d1401, 0x0f1e1300, 
> + 
> +        0x00111e11, 0x00131d10, 0x01141d0e, 0x02151c0d, 
> +        0x03161c0b, 0x04171b0a, 0x05171b09, 0x06181a08, 
> +        0x07191907, 0x081a1806, 0x091a1805, 0x0a1b1704, 
> +        0x0b1c1603, 0x0d1c1502, 0x0e1d1401, 0x0f1d1301, 
> +}; 
> + 
> +static int sun8i_ui_scaler_coef_index(unsigned int step) 
> +{ 
> +        unsigned int scale, int_part, float_part; 
> + 
> +        scale = step >> (SUN8I_UI_SCALER_SCALE_FRAC - 3); 
> +        int_part = scale >> 3; 
> +        float_part = scale & 0x7; 
> + 
> +        switch (int_part) { 
> +        case 0: 
> +                return 0; 
> +        case 1: 
> +                return float_part; 
> +        case 2: 
> +                return 8 + (float_part >> 1); 
> +        case 3: 
> +                return 12; 
> +        case 4: 
> +                return 13; 
> +        default: 
> +                return 14; 
> +        } 
> +} 
> + 
> +void sun8i_ui_scaler_enable(struct sun8i_mixer *mixer, int layer, bool 
> enable) 
> +{ 
> +        int vi_cnt = mixer->cfg->vi_num; 
> +        u32 val; 
> + 
> +        if (WARN_ON(layer < vi_cnt)) 
> +                return; 
> + 
> +        if (enable) 
> +                val = SUN8I_SCALER_GSU_CTRL_EN | 
> +                      SUN8I_SCALER_GSU_CTRL_COEFF_RDY; 
> +        else 
> +                val = 0; 
> + 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_CTRL(vi_cnt, layer - vi_cnt), val); 
> +} 
> + 
> +void sun8i_ui_scaler_setup(struct sun8i_mixer *mixer, int layer, 
> +                           u32 src_w, u32 src_h, u32 dst_w, u32 dst_h, 
> +                           u32 hscale, u32 vscale, u32 hphase, u32 
> vphase) 
> +{ 
> +        int vi_cnt = mixer->cfg->vi_num; 
> +        u32 insize, outsize; 
> +        int i, offset; 
> + 
> +        if (WARN_ON(layer < vi_cnt)) 
> +                return; 
> + 
> +        hphase <<= SUN8I_UI_SCALER_PHASE_FRAC - 16; 
> +        vphase <<= SUN8I_UI_SCALER_PHASE_FRAC - 16; 
> +        hscale <<= SUN8I_UI_SCALER_SCALE_FRAC - 16; 
> +        vscale <<= SUN8I_UI_SCALER_SCALE_FRAC - 16; 
> + 
> +        insize = SUN8I_UI_SCALER_SIZE(src_w, src_h); 
> +        outsize = SUN8I_UI_SCALER_SIZE(dst_w, dst_h); 
> + 
> +        layer -= vi_cnt; 
> + 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_OUTSIZE(vi_cnt, layer), outsize); 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_INSIZE(vi_cnt, layer), insize); 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_HSTEP(vi_cnt, layer), hscale); 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_VSTEP(vi_cnt, layer), vscale); 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_HPHASE(vi_cnt, layer), hphase); 
> +        regmap_write(mixer->engine.regs, 
> +                     SUN8I_SCALER_GSU_VPHASE(vi_cnt, layer), vphase); 
> +        offset = sun8i_ui_scaler_coef_index(hscale) * 
> +                        SUN8I_UI_SCALER_COEFF_COUNT; 
> +        for (i = 0; i < SUN8I_UI_SCALER_COEFF_COUNT; i++) 
> +                regmap_write(mixer->engine.regs, 
> +                             SUN8I_SCALER_GSU_HCOEFF(vi_cnt, layer, i), 
> +                             lan2coefftab16[offset + i]); 
> +} 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h 
> b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h 
> new file mode 100644 
> index 000000000000..86295be8be78 
> --- /dev/null 
> +++ b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h 
> @@ -0,0 +1,49 @@ 
> +/* 
> + * Copyright (C) 2017 Jernej Skrabec <[email protected] <javascript:>> 
> + * 
> + * This file is licensed under the terms of the GNU General Public 
> + * License version 2.  This program is licensed "as is" without any 
> + * warranty of any kind, whether express or implied. 
> + */ 
> + 
> +#ifndef _SUN8I_UI_SCALER_H_ 
> +#define _SUN8I_UI_SCALER_H_ 
> + 
> +#include "sun8i_mixer.h" 
> + 
> +/* this two macros assumes 16 fractional bits which is standard in DRM */ 
> +#define SUN8I_UI_SCALER_SCALE_MIN                1 
> +#define SUN8I_UI_SCALER_SCALE_MAX                ((1UL << 20) - 1) 
> + 
> +#define SUN8I_UI_SCALER_SCALE_FRAC                20 
> +#define SUN8I_UI_SCALER_PHASE_FRAC                20 
> +#define SUN8I_UI_SCALER_COEFF_COUNT                16 
> +#define SUN8I_UI_SCALER_SIZE(w, h)                (((h) - 1) << 16 | ((w) 
> - 1)) 
> + 
> +#define SUN8I_SCALER_GSU_CTRL(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x0) 
> +#define SUN8I_SCALER_GSU_OUTSIZE(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x40) 
> +#define SUN8I_SCALER_GSU_INSIZE(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x80) 
> +#define SUN8I_SCALER_GSU_HSTEP(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x88) 
> +#define SUN8I_SCALER_GSU_VSTEP(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x8c) 
> +#define SUN8I_SCALER_GSU_HPHASE(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x90) 
> +#define SUN8I_SCALER_GSU_VPHASE(vi_cnt, ui_idx) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x98) 
> +#define SUN8I_SCALER_GSU_HCOEFF(vi_cnt, ui_idx, index) \ 
> +        (0x20000 + 0x20000 * (vi_cnt) + 0x10000 * (ui_idx) + 0x200 + \ 
> +        0x4 * (index)) 
> + 
> +#define SUN8I_SCALER_GSU_CTRL_EN                BIT(0) 
> +#define SUN8I_SCALER_GSU_CTRL_COEFF_RDY                BIT(4) 
> + 
> +void sun8i_ui_scaler_enable(struct sun8i_mixer *mixer, int layer, bool 
> enable); 
> +void sun8i_ui_scaler_setup(struct sun8i_mixer *mixer, int layer, 
> +                           u32 src_w, u32 src_h, u32 dst_w, u32 dst_h, 
> +                           u32 hscale, u32 vscale, u32 hphase, u32 
> vphase); 
> + 
> +#endif 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c 
> b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c 
> index b78d4f3e2b48..e47a0c1f640d 100644 
> --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c 
> +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c 
> @@ -18,6 +18,7 @@ 
>   
>  #include "sun8i_vi_layer.h" 
>  #include "sun8i_mixer.h" 
> +#include "sun8i_vi_scaler.h" 
>   
>  static void sun8i_vi_layer_enable(struct sun8i_mixer *mixer, int channel, 
>                                    int overlay, bool enable) 
> @@ -50,36 +51,61 @@ static int sun8i_vi_layer_update_coord(struct 
> sun8i_mixer *mixer, int channel, 
>                                         int overlay, struct drm_plane 
> *plane) 
>  { 
>          struct drm_plane_state *state = plane->state; 
> -        u32 width, height, size; 
> +        u32 src_w, src_h, dst_w, dst_h; 
> +        u32 outsize, insize; 
> +        u32 hphase, vphase; 
>   
>          DRM_DEBUG_DRIVER("Updating VI channel %d overlay %d\n", 
>                           channel, overlay); 
> -        /* 
> -         * Same source and destination width and height are guaranteed 
> -         * by atomic check function. 
> -         */ 
> -        width = drm_rect_width(&state->dst); 
> -        height = drm_rect_height(&state->dst); 
> -        size = SUN8I_MIXER_SIZE(width, height); 
> + 
> +        src_w = drm_rect_width(&state->src) >> 16; 
> +        src_h = drm_rect_height(&state->src) >> 16; 
> +        dst_w = drm_rect_width(&state->dst); 
> +        dst_h = drm_rect_height(&state->dst); 
> + 
> +        hphase = state->src.x1 & 0xffff; 
> +        vphase = state->src.y1 & 0xffff; 
> + 
> +        insize = SUN8I_MIXER_SIZE(src_w, src_h); 
> +        outsize = SUN8I_MIXER_SIZE(dst_w, dst_h); 
>   
>          /* Set height and width */ 
> -        DRM_DEBUG_DRIVER("Layer size W: %u H: %u\n", width, height); 
> +        DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n", 
> +                         state->src.x1 >> 16, state->src.y1 >> 16); 
> +        DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, 
> src_h); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_CHAN_VI_LAYER_SIZE(channel, overlay), 
> -                     size); 
> +                     insize); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_CHAN_VI_OVL_SIZE(channel), 
> -                     size); 
> +                     insize); 
> + 
> +        if (insize != outsize || hphase || vphase) { 
> +                u32 hscale, vscale; 
> + 
> +                DRM_DEBUG_DRIVER("HW scaling is enabled\n"); 
> + 
> +                hscale = state->src_w / state->crtc_w; 
> +                vscale = state->src_h / state->crtc_h; 
> + 
> +                sun8i_vi_scaler_setup(mixer, channel, src_w, src_h, 
> dst_w, 
> +                                      dst_h, hscale, vscale, hphase, 
> vphase); 
> +                sun8i_vi_scaler_enable(mixer, channel, true); 
> +        } else { 
> +                DRM_DEBUG_DRIVER("HW scaling is not needed\n"); 
> +                sun8i_vi_scaler_enable(mixer, channel, false); 
> +        } 
>   
>          /* Set base coordinates */ 
> -        DRM_DEBUG_DRIVER("Layer coordinates X: %d Y: %d\n", 
> +        DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n", 
>                           state->dst.x1, state->dst.y1); 
> +        DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, 
> dst_h); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_BLEND_ATTR_COORD(channel), 
>                       SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1)); 
>          regmap_write(mixer->engine.regs, 
>                       SUN8I_MIXER_BLEND_ATTR_INSIZE(channel), 
> -                     size); 
> +                     outsize); 
>   
>          return 0; 
>  } 
> @@ -147,8 +173,10 @@ static int sun8i_vi_layer_update_buffer(struct 
> sun8i_mixer *mixer, int channel, 
>  static int sun8i_vi_layer_atomic_check(struct drm_plane *plane, 
>                                         struct drm_plane_state *state) 
>  { 
> +        struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane); 
>          struct drm_crtc *crtc = state->crtc; 
>          struct drm_crtc_state *crtc_state; 
> +        int min_scale, max_scale; 
>          struct drm_rect clip; 
>   
>          if (!crtc) 
> @@ -163,9 +191,13 @@ static int sun8i_vi_layer_atomic_check(struct 
> drm_plane *plane, 
>          clip.x2 = crtc_state->adjusted_mode.hdisplay; 
>          clip.y2 = crtc_state->adjusted_mode.vdisplay; 
>   
>

Refactoring gone wrong. Two lines are missing:

min_scale = DRM_PLANE_HELPER_NO_SCALING; 
max_scale = DRM_PLANE_HELPER_NO_SCALING; 

I will send new version after I get some comments.

Best regards,
Jernej

 

> +        if (layer->mixer->cfg->scaler_mask & BIT(layer->channel)) { 
> +                min_scale = SUN8I_VI_SCALER_SCALE_MIN; 
> +                max_scale = SUN8I_VI_SCALER_SCALE_MAX; 
> +        } 
> + 
>          return drm_plane_helper_check_state(state, &clip, 
> -                                            DRM_PLANE_HELPER_NO_SCALING, 
> -                                            DRM_PLANE_HELPER_NO_SCALING, 
> +                                            min_scale, max_scale, 
>                                              true, true); 
>  } 
>   
> diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c 
> b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c 
> new file mode 100644 
> index 000000000000..68b92e46be68 
> --- /dev/null 
> +++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c 
> @@ -0,0 +1,535 @@ 
> +/* 
> + * Copyright (C) 2017 Jernej Skrabec <[email protected] <javascript:>> 
> + * 
> + * Coefficients are taken from BSP driver, which is: 
> + * Copyright (C) 2014-2015 Allwinner 
> + * 
> + * This file is licensed under the terms of the GNU General Public 
> + * License version 2.  This program is licensed "as is" without any 
> + * warranty of any kind, whether express or implied. 
> + */ 
> + 
> +#include "sun8i_vi_scaler.h" 
> + 
> +static const u32 lan3coefftab32_left[480] = { 
> +        0x40000000, 0x40fe0000, 0x3ffd0100, 0x3efc0100, 
> +        0x3efb0100, 0x3dfa0200, 0x3cf90200, 0x3bf80200, 
> +        0x39f70200, 0x37f70200, 0x35f70200, 0x33f70200, 
> +        0x31f70200, 0x2ef70200, 0x2cf70200, 0x2af70200, 
> +        0x27f70200, 0x24f80100, 0x22f80100, 0x1ef90100, 
> +        0x1cf90100, 0x19fa0100, 0x17fa0100, 0x14fb0100, 
> +        0x11fc0000, 0x0ffc0000, 0x0cfd0000, 0x0afd0000, 
> +        0x08fe0000, 0x05ff0000, 0x03ff0000, 0x02000000, 
> + 
> +        0x3806fc02, 0x3805fc02, 0x3803fd01, 0x3801fe01, 
> +        0x3700fe01, 0x35ffff01, 0x35fdff01, 0x34fc0001, 
> +        0x34fb0000, 0x33fa0000, 0x31fa0100, 0x2ff90100, 
> +        0x2df80200, 0x2bf80200, 0x2af70200, 0x28f70200, 
> +        0x27f70200, 0x24f70300, 0x22f70300, 0x1ff70300, 
> +        0x1ef70300, 0x1cf70300, 0x1af70300, 0x18f70300, 
> +        0x16f80300, 0x13f80300, 0x11f90300, 0x0ef90300, 
> +        0x0efa0200, 0x0cfa0200, 0x0afb0200, 0x08fb0200, 
> + 
> +        0x320bfa02, 0x3309fa02, 0x3208fb02, 0x3206fb02, 
> +        0x3205fb02, 0x3104fc02, 0x3102fc01, 0x3001fd01, 
> +        0x3000fd01, 0x2ffffd01, 0x2efefe01, 0x2dfdfe01, 
> +        0x2bfcff01, 0x29fcff01, 0x28fbff01, 0x27fa0001, 
> +        0x26fa0000, 0x24f90000, 0x22f90100, 0x20f90100, 
> +        0x1ff80100, 0x1ef80100, 0x1cf80100, 0x1af80200, 
> +        0x18f80200, 0x17f80200, 0x15f80200, 0x12f80200, 
> +        0x11f90200, 0x0ff90200, 0x0df90200, 0x0cfa0200, 
> + 
> +        0x2e0efa01, 0x2f0dfa01, 0x2f0bfa01, 0x2e0afa01, 
> +        0x2e09fa01, 0x2e07fb01, 0x2d06fb01, 0x2d05fb01, 
> +        0x2c04fb01, 0x2b03fc01, 0x2a02fc01, 0x2a01fc01, 
> +        0x2800fd01, 0x28fffd01, 0x26fefd01, 0x25fefe01, 
> +        0x24fdfe01, 0x23fcfe01, 0x21fcff01, 0x20fbff01, 
> +        0x1efbff01, 0x1efbff00, 0x1cfa0000, 0x1bfa0000, 
> +        0x19fa0000, 0x18fa0000, 0x17f90000, 0x15f90100, 
> +        0x14f90100, 0x12f90100, 0x11f90100, 0x0ff90100, 
> + 
> +        0x2b10fa00, 0x2b0ffa00, 0x2b0efa00, 0x2b0cfa00, 
> +        0x2b0bfa00, 0x2a0afb01, 0x2a09fb01, 0x2908fb01, 
> +        0x2807fb01, 0x2806fb01, 0x2805fb01, 0x2604fc01, 
> +        0x2503fc01, 0x2502fc01, 0x2401fc01, 0x2301fc01, 
> +        0x2100fd01, 0x21fffd01, 0x21fffd01, 0x20fefd01, 
> +        0x1dfefe01, 0x1cfdfe01, 0x1cfdfe00, 0x1bfcfe00, 
> +        0x19fcff00, 0x19fbff00, 0x17fbff00, 0x16fbff00, 
> +        0x15fbff00, 0x14fb0000, 0x13fa0000, 0x11fa0000, 
> + 
> +        0x2811fcff, 0x2810fcff, 0x280ffbff, 0x280efbff, 
> +        0x270dfb00, 0x270cfb00, 0x270bfb00, 0x260afb00, 
> +        0x2609fb00, 0x2508fb00, 0x2507fb00, 0x2407fb00, 
> +        0x2406fc00, 0x2305fc00, 0x2204fc00, 0x2203fc00, 
> +        0x2103fc00, 0x2002fc00, 0x1f01fd00, 0x1e01fd00, 
> +        0x1d00fd00, 0x1dfffd00, 0x1cfffd00, 0x1bfefd00, 
> +        0x1afefe00, 0x19fefe00, 0x18fdfe00, 0x17fdfe00, 
> +        0x16fdfe00, 0x15fcff00, 0x13fcff00, 0x12fcff00, 
> + 
> +        0x2512fdfe, 0x2511fdff, 0x2410fdff, 0x240ffdff, 
> +        0x240efcff, 0x240dfcff, 0x240dfcff, 0x240cfcff, 
> +        0x230bfcff, 0x230afc00, 0x2209fc00, 0x2108fc00, 
> +        0x2108fc00, 0x2007fc00, 0x2006fc00, 0x2005fc00, 
> +        0x1f05fc00, 0x1e04fc00, 0x1e03fc00, 0x1c03fd00, 
> +        0x1c02fd00, 0x1b02fd00, 0x1b01fd00, 0x1a00fd00, 
> +        0x1900fd00, 0x1800fd00, 0x17fffe00, 0x16fffe00, 
> +        0x16fefe00, 0x14fefe00, 0x13fefe00, 0x13fdfe00, 
> + 
> +        0x2212fffe, 0x2211fefe, 0x2211fefe, 0x2110fefe, 
> +        0x210ffeff, 0x220efdff, 0x210dfdff, 0x210dfdff, 
> +        0x210cfdff, 0x210bfdff, 0x200afdff, 0x200afdff, 
> +        0x1f09fdff, 0x1f08fdff, 0x1d08fd00, 0x1c07fd00, 
> +        0x1d06fd00, 0x1b06fd00, 0x1b05fd00, 0x1c04fd00, 
> +        0x1b04fd00, 0x1a03fd00, 0x1a03fd00, 0x1902fd00, 
> +        0x1802fd00, 0x1801fd00, 0x1701fd00, 0x1600fd00, 
> +        0x1400fe00, 0x1400fe00, 0x14fffe00, 0x13fffe00, 
> + 
> +        0x201200fe, 0x201100fe, 0x1f11fffe, 0x2010fffe, 
> +        0x1f0ffffe, 0x1e0ffffe, 0x1f0efeff, 0x1f0dfeff, 
> +        0x1f0dfeff, 0x1e0cfeff, 0x1e0bfeff, 0x1d0bfeff, 
> +        0x1d0afeff, 0x1d09fdff, 0x1d09fdff, 0x1c08fdff, 
> +        0x1c07fdff, 0x1b07fd00, 0x1b06fd00, 0x1a06fd00, 
> +        0x1a05fd00, 0x1805fd00, 0x1904fd00, 0x1804fd00, 
> +        0x1703fd00, 0x1703fd00, 0x1602fe00, 0x1502fe00, 
> +        0x1501fe00, 0x1401fe00, 0x1301fe00, 0x1300fe00, 
> + 
> +        0x1c1202fe, 0x1c1102fe, 0x1b1102fe, 0x1c1001fe, 
> +        0x1b1001fe, 0x1b0f01ff, 0x1b0e00ff, 0x1b0e00ff, 
> +        0x1b0d00ff, 0x1a0d00ff, 0x1a0c00ff, 0x1a0cffff, 
> +        0x1a0bffff, 0x1a0bffff, 0x1a0affff, 0x180affff, 
> +        0x1909ffff, 0x1809ffff, 0x1808ffff, 0x1808feff, 
> +        0x1807feff, 0x1707fe00, 0x1606fe00, 0x1506fe00, 
> +        0x1605fe00, 0x1505fe00, 0x1504fe00, 0x1304fe00, 
> +        0x1304fe00, 0x1303fe00, 0x1203fe00, 0x1203fe00, 
> + 
> +        0x181104ff, 0x191103ff, 0x191003ff, 0x181003ff, 
> +        0x180f03ff, 0x190f02ff, 0x190e02ff, 0x180e02ff, 
> +        0x180d02ff, 0x180d01ff, 0x180d01ff, 0x180c01ff, 
> +        0x180c01ff, 0x180b00ff, 0x170b00ff, 0x170a00ff, 
> +        0x170a00ff, 0x170900ff, 0x160900ff, 0x160900ff, 
> +        0x1608ffff, 0x1508ffff, 0x1507ff00, 0x1507ff00, 
> +        0x1407ff00, 0x1306ff00, 0x1306ff00, 0x1305ff00, 
> +        0x1205ff00, 0x1105ff00, 0x1204ff00, 0x1104ff00, 
> + 
> +        0x171005ff, 0x171005ff, 0x171004ff, 0x170f04ff, 
> +        0x160f04ff, 0x170f03ff, 0x170e03ff, 0x160e03ff, 
> +        0x160d03ff, 0x160d02ff, 0x160d02ff, 0x160c02ff, 
> +        0x160c02ff, 0x160c02ff, 0x160b01ff, 0x150b01ff, 
> +        0x150a01ff, 0x150a01ff, 0x150a01ff, 0x140901ff, 
> +        0x14090000, 0x14090000, 0x14080000, 0x13080000, 
> +        0x13070000, 0x12070000, 0x12070000, 0x12060000, 
> +        0x11060000, 0x11060000, 0x11050000, 0x1105ff00, 
> + 
> +        0x14100600, 0x15100500, 0x150f0500, 0x150f0500, 
> +        0x140f0500, 0x150e0400, 0x140e0400, 0x130e0400, 
> +        0x140d0400, 0x150d0300, 0x130d0300, 0x140c0300, 
> +        0x140c0300, 0x140c0200, 0x140b0200, 0x130b0200, 
> +        0x120b0200, 0x130a0200, 0x130a0200, 0x130a0100, 
> +        0x13090100, 0x12090100, 0x11090100, 0x12080100, 
> +        0x11080100, 0x10080100, 0x11070100, 0x11070000, 
> +        0x10070000, 0x11060000, 0x10060000, 0x10060000, 
> + 
> +        0x140f0600, 0x140f0600, 0x130f0600, 0x140f0500, 
> +        0x140e0500, 0x130e0500, 0x130e0500, 0x140d0400, 
> +        0x140d0400, 0x130d0400, 0x120d0400, 0x130c0400, 
> +        0x130c0300, 0x130c0300, 0x130b0300, 0x130b0300, 
> +        0x110b0300, 0x130a0200, 0x120a0200, 0x120a0200, 
> +        0x120a0200, 0x12090200, 0x10090200, 0x11090100, 
> +        0x11080100, 0x11080100, 0x10080100, 0x10080100, 
> +        0x10070100, 0x10070100, 0x0f070100, 0x10060100, 
> + 
> +        0x120f0701, 0x130f0601, 0x130e0601, 0x130e0601, 
> +        0x120e0601, 0x130e0501, 0x130e0500, 0x130d0500, 
> +        0x120d0500, 0x120d0500, 0x130c0400, 0x130c0400, 
> +        0x120c0400, 0x110c0400, 0x120b0400, 0x120b0300, 
> +        0x120b0300, 0x120b0300, 0x120a0300, 0x110a0300, 
> +        0x110a0200, 0x11090200, 0x11090200, 0x10090200, 
> +        0x10090200, 0x10080200, 0x10080200, 0x10080100, 
> +        0x0f080100, 0x10070100, 0x0f070100, 0x0f070100 
> +}; 
> + 
> +static const u32 lan3coefftab32_right[480] = { 
> +        0x00000000, 0x00000002, 0x0000ff04, 0x0000ff06, 
> +        0x0000fe08, 0x0000fd0a, 0x0000fd0c, 0x0000fc0f, 
> +        0x0000fc12, 0x0001fb14, 0x0001fa17, 0x0001fa19, 
> +        0x0001f91c, 0x0001f91f, 0x0001f822, 0x0001f824, 
> +        0x0002f727, 0x0002f72a, 0x0002f72c, 0x0002f72f, 
> +        0x0002f731, 0x0002f733, 0x0002f735, 0x0002f737, 
> +        0x0002f73a, 0x0002f83b, 0x0002f93c, 0x0002fa3d, 
> +        0x0001fb3e, 0x0001fc3f, 0x0001fd40, 0x0000fe40, 
> + 
> +        0x0002fc06, 0x0002fb08, 0x0002fb0a, 0x0002fa0c, 
> +        0x0002fa0e, 0x0003f910, 0x0003f912, 0x0003f814, 
> +        0x0003f816, 0x0003f719, 0x0003f71a, 0x0003f71d, 
> +        0x0003f71f, 0x0003f721, 0x0003f723, 0x0003f725, 
> +        0x0002f727, 0x0002f729, 0x0002f72b, 0x0002f82d, 
> +        0x0002f82e, 0x0001f930, 0x0001fa31, 0x0000fa34, 
> +        0x0000fb34, 0x0100fc35, 0x01fffd36, 0x01ffff37, 
> +        0x01fe0037, 0x01fe0138, 0x01fd0338, 0x02fc0538, 
> + 
> +        0x0002fa0b, 0x0002fa0c, 0x0002f90e, 0x0002f910, 
> +        0x0002f911, 0x0002f813, 0x0002f816, 0x0002f817, 
> +        0x0002f818, 0x0002f81a, 0x0001f81c, 0x0001f81e, 
> +        0x0001f820, 0x0001f921, 0x0001f923, 0x0000f925, 
> +        0x0000fa26, 0x0100fa28, 0x01fffb29, 0x01fffc2a, 
> +        0x01fffc2c, 0x01fefd2d, 0x01fefe2e, 0x01fdff2f, 
> +        0x01fd0030, 0x01fd0130, 0x01fc0232, 0x02fc0432, 
> +        0x02fb0532, 0x02fb0633, 0x02fb0833, 0x02fa0933, 
> + 
> +        0x0001fa0e, 0x0001f90f, 0x0001f911, 0x0001f913, 
> +        0x0001f914, 0x0001f915, 0x0000f918, 0x0000fa18, 
> +        0x0000fa1a, 0x0000fa1b, 0x0000fa1d, 0x00fffb1e, 
> +        0x01fffb1f, 0x01fffb20, 0x01fffc22, 0x01fefc23, 
> +        0x01fefd24, 0x01fefe25, 0x01fdfe27, 0x01fdff28, 
> +        0x01fd0029, 0x01fc012a, 0x01fc022b, 0x01fc032b, 
> +        0x01fb042d, 0x01fb052d, 0x01fb062e, 0x01fb072e, 
> +        0x01fa092e, 0x01fa0a2f, 0x01fa0b2f, 0x01fa0d2f, 
> + 
> +        0x0000fa11, 0x0000fa12, 0x0000fa13, 0x0000fb14, 
> +        0x00fffb16, 0x00fffb16, 0x00fffb17, 0x00fffb19, 
> +        0x00fffc1a, 0x00fefc1c, 0x00fefd1c, 0x01fefd1d, 
> +        0x01fefe1e, 0x01fdfe20, 0x01fdff21, 0x01fdff22, 
> +        0x01fd0023, 0x01fc0124, 0x01fc0124, 0x01fc0225, 
> +        0x01fc0326, 0x01fc0427, 0x01fb0528, 0x01fb0629, 
> +        0x01fb0729, 0x01fb0829, 0x01fb092a, 0x01fb0a2a, 
> +        0x00fa0b2c, 0x00fa0c2b, 0x00fa0e2b, 0x00fa0f2c, 
> + 
> +        0x00fffc11, 0x00fffc12, 0x00fffc14, 0x00fffc15, 
> +        0x00fefd16, 0x00fefd17, 0x00fefd18, 0x00fefe19, 
> +        0x00fefe1a, 0x00fdfe1d, 0x00fdff1d, 0x00fdff1e, 
> +        0x00fd001d, 0x00fd011e, 0x00fd0120, 0x00fc0221, 
> +        0x00fc0321, 0x00fc0323, 0x00fc0423, 0x00fc0523, 
> +        0x00fc0624, 0x00fb0725, 0x00fb0726, 0x00fb0827, 
> +        0x00fb0926, 0x00fb0a26, 0x00fb0b27, 0x00fb0c27, 
> +        0x00fb0d27, 0xfffb0e28, 0xfffb0f29, 0xfffc1028, 
> + 
> +        0x00fefd13, 0x00fefd13, 0x00fefe14, 0x00fefe15, 
> +        0x00fefe17, 0x00feff17, 0x00feff17, 0x00fd0018, 
> +        0x00fd001a, 0x00fd001a, 0x00fd011b, 0x00fd021c, 
> +        0x00fd021c, 0x00fd031d, 0x00fc031f, 0x00fc041f, 
> +        0x00fc051f, 0x00fc0521, 0x00fc0621, 0x00fc0721, 
> +        0x00fc0821, 0x00fc0822, 0x00fc0922, 0x00fc0a23, 
> +        0xfffc0b24, 0xfffc0c24, 0xfffc0d24, 0xfffc0d25, 
> +        0xfffc0e25, 0xfffd0f25, 0xfffd1025, 0xfffd1125, 
> + 
> +        0x00feff12, 0x00feff14, 0x00feff14, 0x00fe0015, 
> +        0x00fe0015, 0x00fd0017, 0x00fd0118, 0x00fd0118, 
> +        0x00fd0218, 0x00fd0219, 0x00fd031a, 0x00fd031a, 
> +        0x00fd041b, 0x00fd041c, 0x00fd051c, 0x00fd061d, 
> +        0x00fd061d, 0x00fd071e, 0x00fd081e, 0xfffd081f, 
> +        0xfffd091f, 0xfffd0a20, 0xfffd0a20, 0xfffd0b21, 
> +        0xfffd0c21, 0xfffd0d21, 0xfffd0d22, 0xfffd0e23, 
> +        0xfffe0f22, 0xfefe1022, 0xfefe1122, 0xfefe1123, 
> + 
> +        0x00fe0012, 0x00fe0013, 0x00fe0114, 0x00fe0114, 
> +        0x00fe0116, 0x00fe0216, 0x00fe0216, 0x00fd0317, 
> +        0x00fd0317, 0x00fd0418, 0x00fd0419, 0x00fd0519, 
> +        0x00fd051a, 0x00fd061b, 0x00fd061b, 0x00fd071c, 
> +        0xfffd071e, 0xfffd081d, 0xfffd091d, 0xfffd091e, 
> +        0xfffe0a1d, 0xfffe0b1e, 0xfffe0b1e, 0xfffe0c1e, 
> +        0xfffe0d1f, 0xfffe0d1f, 0xfffe0e1f, 0xfeff0f1f, 
> +        0xfeff0f20, 0xfeff1020, 0xfeff1120, 0xfe001120, 
> + 
> +        0x00fe0212, 0x00fe0312, 0x00fe0313, 0x00fe0314, 
> +        0x00fe0414, 0x00fe0414, 0x00fe0416, 0x00fe0515, 
> +        0x00fe0516, 0x00fe0616, 0x00fe0617, 0x00fe0717, 
> +        0xfffe0719, 0xfffe0818, 0xffff0818, 0xffff0919, 
> +        0xffff0919, 0xffff0a19, 0xffff0a1a, 0xffff0b1a, 
> +        0xffff0b1b, 0xffff0c1a, 0xff000c1b, 0xff000d1b, 
> +        0xff000d1b, 0xff000e1b, 0xff000e1c, 0xff010f1c, 
> +        0xfe01101c, 0xfe01101d, 0xfe02111c, 0xfe02111c, 
> + 
> +        0x00ff0411, 0x00ff0411, 0x00ff0412, 0x00ff0512, 
> +        0x00ff0513, 0x00ff0513, 0x00ff0613, 0x00ff0614, 
> +        0x00ff0714, 0x00ff0715, 0x00ff0715, 0xffff0816, 
> +        0xffff0816, 0xff000916, 0xff000917, 0xff000918, 
> +        0xff000a17, 0xff000a18, 0xff000b18, 0xff000b18, 
> +        0xff010c18, 0xff010c19, 0xff010d18, 0xff010d18, 
> +        0xff020d18, 0xff020e19, 0xff020e19, 0xff020f19, 
> +        0xff030f19, 0xff031019, 0xff031019, 0xff031119, 
> + 
> +        0x00ff0511, 0x00ff0511, 0x00000511, 0x00000611, 
> +        0x00000612, 0x00000612, 0x00000712, 0x00000713, 
> +        0x00000714, 0x00000814, 0x00000814, 0x00000914, 
> +        0x00000914, 0xff010914, 0xff010a15, 0xff010a16, 
> +        0xff010a17, 0xff010b16, 0xff010b16, 0xff020c16, 
> +        0xff020c16, 0xff020c16, 0xff020d16, 0xff020d17, 
> +        0xff030d17, 0xff030e17, 0xff030e17, 0xff030f17, 
> +        0xff040f17, 0xff040f17, 0xff041017, 0xff051017, 
> + 
> +        0x00000610, 0x00000610, 0x00000611, 0x00000611, 
> +        0x00000711, 0x00000712, 0x00010712, 0x00010812, 
> +        0x00010812, 0x00010812, 0x00010913, 0x00010913, 
> +        0x00010913, 0x00010a13, 0x00020a13, 0x00020a14, 
> +        0x00020b14, 0x00020b14, 0x00020b14, 0x00020c14, 
> +        0x00030c14, 0x00030c15, 0x00030d15, 0x00030d15, 
> +        0x00040d15, 0x00040e15, 0x00040e15, 0x00040e16, 
> +        0x00050f15, 0x00050f15, 0x00050f16, 0x00051015, 
> + 
> +        0x00000611, 0x00010610, 0x00010710, 0x00010710, 
> +        0x00010711, 0x00010811, 0x00010811, 0x00010812, 
> +        0x00010812, 0x00010912, 0x00020912, 0x00020912, 
> +        0x00020a12, 0x00020a12, 0x00020a13, 0x00020a13, 
> +        0x00030b13, 0x00030b13, 0x00030b14, 0x00030c13, 
> +        0x00030c13, 0x00040c13, 0x00040d14, 0x00040d14, 
> +        0x00040d15, 0x00040d15, 0x00050e14, 0x00050e14, 
> +        0x00050e15, 0x00050f14, 0x00060f14, 0x00060f14, 
> + 
> +        0x0001070f, 0x0001070f, 0x00010710, 0x00010710, 
> +        0x00010810, 0x00010810, 0x00020810, 0x00020811, 
> +        0x00020911, 0x00020911, 0x00020912, 0x00020912, 
> +        0x00020a12, 0x00030a12, 0x00030a12, 0x00030b12, 
> +        0x00030b12, 0x00030b12, 0x00040b12, 0x00040c12, 
> +        0x00040c13, 0x00040c14, 0x00040c14, 0x00050d13, 
> +        0x00050d13, 0x00050d14, 0x00050e13, 0x01050e13, 
> +        0x01060e13, 0x01060e13, 0x01060e14, 0x01060f13 
> +}; 
> + 
> +static const u32 lan2coefftab32[480] = { 
> +        0x00004000, 0x000140ff, 0x00033ffe, 0x00043ffd, 
> +        0x00063efc, 0xff083dfc, 0x000a3bfb, 0xff0d39fb, 
> +        0xff0f37fb, 0xff1136fa, 0xfe1433fb, 0xfe1631fb, 
> +        0xfd192ffb, 0xfd1c2cfb, 0xfd1f29fb, 0xfc2127fc, 
> +        0xfc2424fc, 0xfc2721fc, 0xfb291ffd, 0xfb2c1cfd, 
> +        0xfb2f19fd, 0xfb3116fe, 0xfb3314fe, 0xfa3611ff, 
> +        0xfb370fff, 0xfb390dff, 0xfb3b0a00, 0xfc3d08ff, 
> +        0xfc3e0600, 0xfd3f0400, 0xfe3f0300, 0xff400100, 
> + 
> +        0xff053804, 0xff063803, 0xff083801, 0xff093701, 
> +        0xff0a3700, 0xff0c3500, 0xff0e34ff, 0xff1033fe, 
> +        0xff1232fd, 0xfe1431fd, 0xfe162ffd, 0xfe182dfd, 
> +        0xfd1b2cfc, 0xfd1d2afc, 0xfd1f28fc, 0xfd2126fc, 
> +        0xfd2323fd, 0xfc2621fd, 0xfc281ffd, 0xfc2a1dfd, 
> +        0xfc2c1bfd, 0xfd2d18fe, 0xfd2f16fe, 0xfd3114fe, 
> +        0xfd3212ff, 0xfe3310ff, 0xff340eff, 0x00350cff, 
> +        0x00360a00, 0x01360900, 0x02370700, 0x03370600, 
> + 
> +        0xff083207, 0xff093206, 0xff0a3205, 0xff0c3203, 
> +        0xff0d3103, 0xff0e3102, 0xfe113001, 0xfe132f00, 
> +        0xfe142e00, 0xfe162dff, 0xfe182bff, 0xfe192aff, 
> +        0xfe1b29fe, 0xfe1d27fe, 0xfe1f25fe, 0xfd2124fe, 
> +        0xfe2222fe, 0xfe2421fd, 0xfe251ffe, 0xfe271dfe, 
> +        0xfe291bfe, 0xff2a19fe, 0xff2b18fe, 0xff2d16fe, 
> +        0x002e14fe, 0x002f12ff, 0x013010ff, 0x02300fff, 
> +        0x03310dff, 0x04310cff, 0x05310a00, 0x06310900, 
> + 
> +        0xff0a2e09, 0xff0b2e08, 0xff0c2e07, 0xff0e2d06, 
> +        0xff0f2d05, 0xff102d04, 0xff122c03, 0xfe142c02, 
> +        0xfe152b02, 0xfe172a01, 0xfe182901, 0xfe1a2800, 
> +        0xfe1b2700, 0xfe1d2500, 0xff1e24ff, 0xfe2023ff, 
> +        0xff2121ff, 0xff2320fe, 0xff241eff, 0x00251dfe, 
> +        0x00261bff, 0x00281afe, 0x012818ff, 0x012a16ff, 
> +        0x022a15ff, 0x032b13ff, 0x032c12ff, 0x052c10ff, 
> +        0x052d0fff, 0x062d0d00, 0x072d0c00, 0x082d0b00, 
> + 
> +        0xff0c2a0b, 0xff0d2a0a, 0xff0e2a09, 0xff0f2a08, 
> +        0xff102a07, 0xff112a06, 0xff132905, 0xff142904, 
> +        0xff162803, 0xff172703, 0xff182702, 0xff1a2601, 
> +        0xff1b2501, 0xff1c2401, 0xff1e2300, 0xff1f2200, 
> +        0x00202000, 0x00211f00, 0x01221d00, 0x01231c00, 
> +        0x01251bff, 0x02251aff, 0x032618ff, 0x032717ff, 
> +        0x042815ff, 0x052814ff, 0x052913ff, 0x06291100, 
> +        0x072a10ff, 0x082a0e00, 0x092a0d00, 0x0a2a0c00, 
> + 
> +        0xff0d280c, 0xff0e280b, 0xff0f280a, 0xff102809, 
> +        0xff112808, 0xff122708, 0xff142706, 0xff152705, 
> +        0xff162605, 0xff172604, 0xff192503, 0xff1a2403, 
> +        0x001b2302, 0x001c2202, 0x001d2201, 0x001e2101, 
> +        0x011f1f01, 0x01211e00, 0x01221d00, 0x02221c00, 
> +        0x02231b00, 0x03241900, 0x04241800, 0x04251700, 
> +        0x052616ff, 0x06261400, 0x072713ff, 0x08271100, 
> +        0x08271100, 0x09271000, 0x0a280e00, 0x0b280d00, 
> + 
> +        0xff0e260d, 0xff0f260c, 0xff10260b, 0xff11260a, 
> +        0xff122609, 0xff132608, 0xff142508, 0xff152507, 
> +        0x00152506, 0x00172405, 0x00182305, 0x00192304, 
> +        0x001b2203, 0x001c2103, 0x011d2002, 0x011d2002, 
> +        0x011f1f01, 0x021f1e01, 0x02201d01, 0x03211c00, 
> +        0x03221b00, 0x04221a00, 0x04231801, 0x05241700, 
> +        0x06241600, 0x07241500, 0x08251300, 0x09251200, 
> +        0x09261100, 0x0a261000, 0x0b260f00, 0x0c260e00, 
> + 
> +        0xff0e250e, 0xff0f250d, 0xff10250c, 0xff11250b, 
> +        0x0011250a, 0x00132409, 0x00142408, 0x00152407, 
> +        0x00162307, 0x00172306, 0x00182206, 0x00192205, 
> +        0x011a2104, 0x011b2004, 0x011c2003, 0x021c1f03, 
> +        0x021e1e02, 0x031e1d02, 0x03201c01, 0x04201b01, 
> +        0x04211a01, 0x05221900, 0x05221801, 0x06231700, 
> +        0x07231600, 0x07241500, 0x08241400, 0x09241300, 
> +        0x0a241200, 0x0b241100, 0x0c241000, 0x0d240f00, 
> + 
> +        0x000e240e, 0x000f240d, 0x0010240c, 0x0011240b, 
> +        0x0013230a, 0x0013230a, 0x00142309, 0x00152308, 
> +        0x00162208, 0x00172207, 0x01182106, 0x01192105, 
> +        0x011a2005, 0x021b1f04, 0x021b1f04, 0x021d1e03, 
> +        0x031d1d03, 0x031e1d02, 0x041e1c02, 0x041f1b02, 
> +        0x05201a01, 0x05211901, 0x06211801, 0x07221700, 
> +        0x07221601, 0x08231500, 0x09231400, 0x0a231300, 
> +        0x0a231300, 0x0b231200, 0x0c231100, 0x0d231000, 
> + 
> +        0x000f220f, 0x0010220e, 0x0011220d, 0x0012220c, 
> +        0x0013220b, 0x0013220b, 0x0015210a, 0x0015210a, 
> +        0x01162108, 0x01172008, 0x01182007, 0x02191f06, 
> +        0x02191f06, 0x021a1e06, 0x031a1e05, 0x031c1d04, 
> +        0x041c1c04, 0x041d1c03, 0x051d1b03, 0x051e1a03, 
> +        0x061f1902, 0x061f1902, 0x07201801, 0x08201701, 
> +        0x08211601, 0x09211501, 0x0a211500, 0x0b211400, 
> +        0x0b221300, 0x0c221200, 0x0d221100, 0x0e221000, 
> + 
> +        0x0010210f, 0x0011210e, 0x0011210e, 0x0012210d, 
> +        0x0013210c, 0x0014200c, 0x0114200b, 0x0115200a, 
> +        0x01161f0a, 0x01171f09, 0x02171f08, 0x02181e08, 
> +        0x03181e07, 0x031a1d06, 0x031a1d06, 0x041b1c05, 
> +        0x041c1c04, 0x051c1b04, 0x051d1a04, 0x061d1a03, 
> +        0x071d1903, 0x071e1803, 0x081e1802, 0x081f1702, 
> +        0x091f1602, 0x0a201501, 0x0b1f1501, 0x0b201401, 
> +        0x0c211300, 0x0d211200, 0x0e201200, 0x0e211100, 
> + 
> +        0x00102010, 0x0011200f, 0x0012200e, 0x0013200d, 
> +        0x0013200d, 0x01141f0c, 0x01151f0b, 0x01151f0b, 
> +        0x01161f0a, 0x02171e09, 0x02171e09, 0x03181d08, 
> +        0x03191d07, 0x03191d07, 0x041a1c06, 0x041b1c05, 
> +        0x051b1b05, 0x051c1b04, 0x061c1a04, 0x071d1903, 
> +        0x071d1903, 0x081d1803, 0x081e1703, 0x091e1702, 
> +        0x0a1f1601, 0x0a1f1502, 0x0b1f1501, 0x0c1f1401, 
> +        0x0d201300, 0x0d201300, 0x0e201200, 0x0f201100, 
> + 
> +        0x00102010, 0x0011200f, 0x00121f0f, 0x00131f0e, 
> +        0x00141f0d, 0x01141f0c, 0x01141f0c, 0x01151e0c, 
> +        0x02161e0a, 0x02171e09, 0x03171d09, 0x03181d08, 
> +        0x03181d08, 0x04191c07, 0x041a1c06, 0x051a1b06, 
> +        0x051b1b05, 0x061b1a05, 0x061c1a04, 0x071c1904, 
> +        0x081c1903, 0x081d1803, 0x091d1703, 0x091e1702, 
> +        0x0a1e1602, 0x0b1e1502, 0x0c1e1501, 0x0c1f1401, 
> +        0x0d1f1400, 0x0e1f1300, 0x0e1f1201, 0x0f1f1200, 
> + 
> +        0x00111e11, 0x00121e10, 0x00131e0f, 0x00131e0f, 
> +        0x01131e0e, 0x01141d0e, 0x02151d0c, 0x02151d0c, 
> +        0x02161d0b, 0x03161c0b, 0x03171c0a, 0x04171c09, 
> +        0x04181b09, 0x05181b08, 0x05191b07, 0x06191a07, 
> +        0x061a1a06, 0x071a1906, 0x071b1905, 0x081b1805, 
> +        0x091b1804, 0x091c1704, 0x0a1c1703, 0x0a1c1604, 
> +        0x0b1d1602, 0x0c1d1502, 0x0c1d1502, 0x0d1d1402, 
> +        0x0e1d1401, 0x0e1e1301, 0x0f1e1300, 0x101e1200, 
> + 
> +        0x00111e11, 0x00121e10, 0x00131d10, 0x01131d0f, 
> +        0x01141d0e, 0x01141d0e, 0x02151c0d, 0x02151c0d, 
> +        0x03161c0b, 0x03161c0b, 0x04171b0a, 0x04171b0a, 
> +        0x05171b09, 0x05181a09, 0x06181a08, 0x06191a07, 
> +        0x07191907, 0x071a1906, 0x081a1806, 0x081a1806, 
> +        0x091a1805, 0x0a1b1704, 0x0a1b1704, 0x0b1c1603, 
> +        0x0b1c1603, 0x0c1c1503, 0x0d1c1502, 0x0d1d1402, 
> +        0x0e1d1401, 0x0f1d1301, 0x0f1d1301, 0x101e1200, 
> +}; 
> + 
> +static int sun8i_vi_scaler_coef_index(unsigned int step) 
> +{ 
> +        unsigned int scale, int_part, float_part; 
> + 
> +        scale = step >> (SUN8I_VI_SCALER_SCALE_FRAC - 3); 
> +        int_part = scale >> 3; 
> +        float_part = scale & 0x7; 
> + 
> +        switch (int_part) { 
> +        case 0: 
> +                return 0; 
> +        case 1: 
> +                return float_part; 
> +        case 2: 
> +                return 8 + (float_part >> 1); 
> +        case 3: 
> +                return 12; 
> +        case 4: 
> +                return 13; 
> +        default: 
> +                return 14; 
> +        } 
> +} 
> + 
> +static void sun8i_vi_scaler_set_coeff(struct regmap *map, int layer, 
> +                                      u32 hstep, u32 vstep) 
> +{ 
> +        int offset, i; 
> + 
> +        offset = sun8i_vi_scaler_coef_index(hstep) * 
> +                        SUN8I_VI_SCALER_COEFF_COUNT; 
> +        for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) { 
> +                regmap_write(map, SUN8I_SCALER_VSU_YHCOEFF0(layer, i), 
> +                             lan3coefftab32_left[offset + i]); 
> +                regmap_write(map, SUN8I_SCALER_VSU_YHCOEFF1(layer, i), 
> +                             lan3coefftab32_right[offset + i]); 
> +                regmap_write(map, SUN8I_SCALER_VSU_CHCOEFF0(layer, i), 
> +                             lan3coefftab32_left[offset + i]); 
> +                regmap_write(map, SUN8I_SCALER_VSU_CHCOEFF1(layer, i), 
> +                             lan3coefftab32_right[offset + i]); 
> +        } 
> + 
> +        offset = sun8i_vi_scaler_coef_index(hstep) * 
> +                        SUN8I_VI_SCALER_COEFF_COUNT; 
> +        for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) { 
> +                regmap_write(map, SUN8I_SCALER_VSU_YVCOEFF(layer, i), 
> +                             lan2coefftab32[offset + i]); 
> +                regmap_write(map, SUN8I_SCALER_VSU_CVCOEFF(layer, i), 
> +                             lan2coefftab32[offset + i]); 
> +        } 
> +} 
> + 
>

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