drm/rockchip: vop: support plane scale

Win_full support 1/8 to 8 scale down/up engine, support
all format scale.

Signed-off-by: Mark Yao <mark.yao@rock-chips.com>

2 files changed, 284 insertions, 2 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 16b7d98362b0..5d8ae5e49c44 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -50,6 +50,8 @@
 
 #define VOP_WIN_SET(x, win, name, v) \
                 REG_SET(x, win->base, win->phy->name, v, RELAXED)
+#define VOP_SCL_SET(x, win, name, v) \
+                REG_SET(x, win->base, win->phy->scl->name, v, RELAXED)
 #define VOP_CTRL_SET(x, name, v) \
                 REG_SET(x, 0, (x)->data->ctrl->name, v, NORMAL)
 
@@ -164,7 +166,37 @@ struct vop_ctrl {
         struct vop_reg vpost_st_end;
 };
 
+struct vop_scl_regs {
+        struct vop_reg cbcr_vsd_mode;
+        struct vop_reg cbcr_vsu_mode;
+        struct vop_reg cbcr_hsd_mode;
+        struct vop_reg cbcr_ver_scl_mode;
+        struct vop_reg cbcr_hor_scl_mode;
+        struct vop_reg yrgb_vsd_mode;
+        struct vop_reg yrgb_vsu_mode;
+        struct vop_reg yrgb_hsd_mode;
+        struct vop_reg yrgb_ver_scl_mode;
+        struct vop_reg yrgb_hor_scl_mode;
+        struct vop_reg line_load_mode;
+        struct vop_reg cbcr_axi_gather_num;
+        struct vop_reg yrgb_axi_gather_num;
+        struct vop_reg vsd_cbcr_gt2;
+        struct vop_reg vsd_cbcr_gt4;
+        struct vop_reg vsd_yrgb_gt2;
+        struct vop_reg vsd_yrgb_gt4;
+        struct vop_reg bic_coe_sel;
+        struct vop_reg cbcr_axi_gather_en;
+        struct vop_reg yrgb_axi_gather_en;
+
+        struct vop_reg lb_mode;
+        struct vop_reg scale_yrgb_x;
+        struct vop_reg scale_yrgb_y;
+        struct vop_reg scale_cbcr_x;
+        struct vop_reg scale_cbcr_y;
+};
+
 struct vop_win_phy {
+        const struct vop_scl_regs *scl;
         const uint32_t *data_formats;
         uint32_t nformats;
 
@@ -222,7 +254,36 @@ static const uint32_t formats_234[] = {
         DRM_FORMAT_BGR565,
 };
 
+static const struct vop_scl_regs win_full_scl = {
+        .cbcr_vsd_mode = VOP_REG(WIN0_CTRL1, 0x1, 31),
+        .cbcr_vsu_mode = VOP_REG(WIN0_CTRL1, 0x1, 30),
+        .cbcr_hsd_mode = VOP_REG(WIN0_CTRL1, 0x3, 28),
+        .cbcr_ver_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 26),
+        .cbcr_hor_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 24),
+        .yrgb_vsd_mode = VOP_REG(WIN0_CTRL1, 0x1, 23),
+        .yrgb_vsu_mode = VOP_REG(WIN0_CTRL1, 0x1, 22),
+        .yrgb_hsd_mode = VOP_REG(WIN0_CTRL1, 0x3, 20),
+        .yrgb_ver_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 18),
+        .yrgb_hor_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 16),
+        .line_load_mode = VOP_REG(WIN0_CTRL1, 0x1, 15),
+        .cbcr_axi_gather_num = VOP_REG(WIN0_CTRL1, 0x7, 12),
+        .yrgb_axi_gather_num = VOP_REG(WIN0_CTRL1, 0xf, 8),
+        .vsd_cbcr_gt2 = VOP_REG(WIN0_CTRL1, 0x1, 7),
+        .vsd_cbcr_gt4 = VOP_REG(WIN0_CTRL1, 0x1, 6),
+        .vsd_yrgb_gt2 = VOP_REG(WIN0_CTRL1, 0x1, 5),
+        .vsd_yrgb_gt4 = VOP_REG(WIN0_CTRL1, 0x1, 4),
+        .bic_coe_sel = VOP_REG(WIN0_CTRL1, 0x3, 2),
+        .cbcr_axi_gather_en = VOP_REG(WIN0_CTRL1, 0x1, 1),
+        .yrgb_axi_gather_en = VOP_REG(WIN0_CTRL1, 0x1, 0),
+        .lb_mode = VOP_REG(WIN0_CTRL0, 0x7, 5),
+        .scale_yrgb_x = VOP_REG(WIN0_SCL_FACTOR_YRGB, 0xffff, 0x0),
+        .scale_yrgb_y = VOP_REG(WIN0_SCL_FACTOR_YRGB, 0xffff, 16),
+        .scale_cbcr_x = VOP_REG(WIN0_SCL_FACTOR_CBR, 0xffff, 0x0),
+        .scale_cbcr_y = VOP_REG(WIN0_SCL_FACTOR_CBR, 0xffff, 16),
+};
+
 static const struct vop_win_phy win01_data = {
+        .scl = &win_full_scl,
         .data_formats = formats_01,
         .nformats = ARRAY_SIZE(formats_01),
         .enable = VOP_REG(WIN0_CTRL0, 0x1, 0),
@@ -422,6 +483,126 @@ static bool is_alpha_support(uint32_t format)
         }
 }
 
+static uint16_t scl_vop_cal_scale(enum scale_mode mode, uint32_t src,
+                                  uint32_t dst, bool is_horizontal,
+                                  int vsu_mode, int *vskiplines)
+{
+        uint16_t val = 1 << SCL_FT_DEFAULT_FIXPOINT_SHIFT;
+
+        if (is_horizontal) {
+                if (mode == SCALE_UP)
+                        val = GET_SCL_FT_BIC(src, dst);
+                else if (mode == SCALE_DOWN)
+                        val = GET_SCL_FT_BILI_DN(src, dst);
+        } else {
+                if (mode == SCALE_UP) {
+                        if (vsu_mode == SCALE_UP_BIL)
+                                val = GET_SCL_FT_BILI_UP(src, dst);
+                        else
+                                val = GET_SCL_FT_BIC(src, dst);
+                } else if (mode == SCALE_DOWN) {
+                        if (vskiplines) {
+                                *vskiplines = scl_get_vskiplines(src, dst);
+                                val = scl_get_bili_dn_vskip(src, dst,
+                                                            *vskiplines);
+                        } else {
+                                val = GET_SCL_FT_BILI_DN(src, dst);
+                        }
+                }
+        }
+
+        return val;
+}
+
+static void scl_vop_cal_scl_fac(struct vop *vop, const struct vop_win_data *win,
+                             uint32_t src_w, uint32_t src_h, uint32_t dst_w,
+                             uint32_t dst_h, uint32_t pixel_format)
+{
+        uint16_t yrgb_hor_scl_mode, yrgb_ver_scl_mode;
+        uint16_t cbcr_hor_scl_mode = SCALE_NONE;
+        uint16_t cbcr_ver_scl_mode = SCALE_NONE;
+        int hsub = drm_format_horz_chroma_subsampling(pixel_format);
+        int vsub = drm_format_vert_chroma_subsampling(pixel_format);
+        bool is_yuv = is_yuv_support(pixel_format);
+        uint16_t cbcr_src_w = src_w / hsub;
+        uint16_t cbcr_src_h = src_h / vsub;
+        uint16_t vsu_mode;
+        uint16_t lb_mode;
+        uint32_t val;
+        int vskiplines;
+
+        if (dst_w > 3840) {
+                DRM_ERROR("Maximum destination width (3840) exceeded\n");
+                return;
+        }
+
+        yrgb_hor_scl_mode = scl_get_scl_mode(src_w, dst_w);
+        yrgb_ver_scl_mode = scl_get_scl_mode(src_h, dst_h);
+
+        if (is_yuv) {
+                cbcr_hor_scl_mode = scl_get_scl_mode(cbcr_src_w, dst_w);
+                cbcr_ver_scl_mode = scl_get_scl_mode(cbcr_src_h, dst_h);
+                if (cbcr_hor_scl_mode == SCALE_DOWN)
+                        lb_mode = scl_vop_cal_lb_mode(dst_w, true);
+                else
+                        lb_mode = scl_vop_cal_lb_mode(cbcr_src_w, true);
+        } else {
+                if (yrgb_hor_scl_mode == SCALE_DOWN)
+                        lb_mode = scl_vop_cal_lb_mode(dst_w, false);
+                else
+                        lb_mode = scl_vop_cal_lb_mode(src_w, false);
+        }
+
+        VOP_SCL_SET(vop, win, lb_mode, lb_mode);
+        if (lb_mode == LB_RGB_3840X2) {
+                if (yrgb_ver_scl_mode != SCALE_NONE) {
+                        DRM_ERROR("ERROR : not allow yrgb ver scale\n");
+                        return;
+                }
+                if (cbcr_ver_scl_mode != SCALE_NONE) {
+                        DRM_ERROR("ERROR : not allow cbcr ver scale\n");
+                        return;
+                }
+                vsu_mode = SCALE_UP_BIL;
+        } else if (lb_mode == LB_RGB_2560X4) {
+                vsu_mode = SCALE_UP_BIL;
+        } else {
+                vsu_mode = SCALE_UP_BIC;
+        }
+
+        val = scl_vop_cal_scale(yrgb_hor_scl_mode, src_w, dst_w,
+                                true, 0, NULL);
+        VOP_SCL_SET(vop, win, scale_yrgb_x, val);
+        val = scl_vop_cal_scale(yrgb_ver_scl_mode, src_h, dst_h,
+                                false, vsu_mode, &vskiplines);
+        VOP_SCL_SET(vop, win, scale_yrgb_y, val);
+
+        VOP_SCL_SET(vop, win, vsd_yrgb_gt4, vskiplines == 4);
+        VOP_SCL_SET(vop, win, vsd_yrgb_gt2, vskiplines == 2);
+
+        VOP_SCL_SET(vop, win, yrgb_hor_scl_mode, yrgb_hor_scl_mode);
+        VOP_SCL_SET(vop, win, yrgb_ver_scl_mode, yrgb_ver_scl_mode);
+        VOP_SCL_SET(vop, win, yrgb_hsd_mode, SCALE_DOWN_BIL);
+        VOP_SCL_SET(vop, win, yrgb_vsd_mode, SCALE_DOWN_BIL);
+        VOP_SCL_SET(vop, win, yrgb_vsu_mode, vsu_mode);
+        if (is_yuv) {
+                val = scl_vop_cal_scale(cbcr_hor_scl_mode, cbcr_src_w,
+                                        dst_w, true, 0, NULL);
+                VOP_SCL_SET(vop, win, scale_cbcr_x, val);
+                val = scl_vop_cal_scale(cbcr_ver_scl_mode, cbcr_src_h,
+                                        dst_h, false, vsu_mode, &vskiplines);
+                VOP_SCL_SET(vop, win, scale_cbcr_y, val);
+
+                VOP_SCL_SET(vop, win, vsd_cbcr_gt4, vskiplines == 4);
+                VOP_SCL_SET(vop, win, vsd_cbcr_gt2, vskiplines == 2);
+                VOP_SCL_SET(vop, win, cbcr_hor_scl_mode, cbcr_hor_scl_mode);
+                VOP_SCL_SET(vop, win, cbcr_ver_scl_mode, cbcr_ver_scl_mode);
+                VOP_SCL_SET(vop, win, cbcr_hsd_mode, SCALE_DOWN_BIL);
+                VOP_SCL_SET(vop, win, cbcr_vsd_mode, SCALE_DOWN_BIL);
+                VOP_SCL_SET(vop, win, cbcr_vsu_mode, vsu_mode);
+        }
+}
+
 static void vop_dsp_hold_valid_irq_enable(struct vop *vop)
 {
         unsigned long flags;
@@ -653,11 +834,15 @@ static int vop_update_plane_event(struct drm_plane *plane,
                 .y2 = crtc->mode.vdisplay,
         };
         bool can_position = plane->type != DRM_PLANE_TYPE_PRIMARY;
+        int min_scale = win->phy->scl ? FRAC_16_16(1, 8) :
+                                        DRM_PLANE_HELPER_NO_SCALING;
+        int max_scale = win->phy->scl ? FRAC_16_16(8, 1) :
+                                        DRM_PLANE_HELPER_NO_SCALING;
 
         ret = drm_plane_helper_check_update(plane, crtc, fb,
                                             &src, &dest, &clip,
-                                            DRM_PLANE_HELPER_NO_SCALING,
-                                            DRM_PLANE_HELPER_NO_SCALING,
+                                            min_scale,
+                                            max_scale,
                                             can_position, false, &visible);
         if (ret)
                 return ret;
@@ -761,9 +946,18 @@ static int vop_update_plane_event(struct drm_plane *plane,
                 VOP_WIN_SET(vop, win, uv_vir, uv_vir_stride);
                 VOP_WIN_SET(vop, win, uv_mst, uv_mst);
         }
+
+        if (win->phy->scl)
+                scl_vop_cal_scl_fac(vop, win, actual_w, actual_h,
+                                    dest.x2 - dest.x1, dest.y2 - dest.y1,
+                                    fb->pixel_format);
+
         val = (actual_h - 1) << 16;
         val |= (actual_w - 1) & 0xffff;
         VOP_WIN_SET(vop, win, act_info, val);
+
+        val = (dest.y2 - dest.y1 - 1) << 16;
+        val |= (dest.x2 - dest.x1 - 1) & 0xffff;
         VOP_WIN_SET(vop, win, dsp_info, val);
         val = (dsp_sty - 1) << 16;
         val |= (dsp_stx - 1) & 0xffff;
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
index 63e9b3a084c5..a2d4ddb896fa 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -198,4 +198,92 @@ enum factor_mode {
         ALPHA_SRC_GLOBAL,
 };
 
+enum scale_mode {
+        SCALE_NONE = 0x0,
+        SCALE_UP   = 0x1,
+        SCALE_DOWN = 0x2
+};
+
+enum lb_mode {
+        LB_YUV_3840X5 = 0x0,
+        LB_YUV_2560X8 = 0x1,
+        LB_RGB_3840X2 = 0x2,
+        LB_RGB_2560X4 = 0x3,
+        LB_RGB_1920X5 = 0x4,
+        LB_RGB_1280X8 = 0x5
+};
+
+enum sacle_up_mode {
+        SCALE_UP_BIL = 0x0,
+        SCALE_UP_BIC = 0x1
+};
+
+enum scale_down_mode {
+        SCALE_DOWN_BIL = 0x0,
+        SCALE_DOWN_AVG = 0x1
+};
+
+#define FRAC_16_16(mult, div)    (((mult) << 16) / (div))
+#define SCL_FT_DEFAULT_FIXPOINT_SHIFT   12
+#define SCL_MAX_VSKIPLINES              4
+#define MIN_SCL_FT_AFTER_VSKIP          1
+
+static inline uint16_t scl_cal_scale(int src, int dst, int shift)
+{
+        return ((src * 2 - 3) << (shift - 1)) / (dst - 1);
+}
+
+#define GET_SCL_FT_BILI_DN(src, dst)    scl_cal_scale(src, dst, 12)
+#define GET_SCL_FT_BILI_UP(src, dst)    scl_cal_scale(src, dst, 16)
+#define GET_SCL_FT_BIC(src, dst)        scl_cal_scale(src, dst, 16)
+
+static inline uint16_t scl_get_bili_dn_vskip(int src_h, int dst_h,
+                                             int vskiplines)
+{
+        int act_height;
+
+        act_height = (src_h + vskiplines - 1) / vskiplines;
+
+        return GET_SCL_FT_BILI_DN(act_height, dst_h);
+}
+
+static inline enum scale_mode scl_get_scl_mode(int src, int dst)
+{
+        if (src < dst)
+                return SCALE_UP;
+        else if (src > dst)
+                return SCALE_DOWN;
+
+        return SCALE_NONE;
+}
+
+static inline int scl_get_vskiplines(uint32_t srch, uint32_t dsth)
+{
+        uint32_t vskiplines;
+
+        for (vskiplines = SCL_MAX_VSKIPLINES; vskiplines > 1; vskiplines /= 2)
+                if (srch >= vskiplines * dsth * MIN_SCL_FT_AFTER_VSKIP)
+                        break;
+
+        return vskiplines;
+}
+
+static inline int scl_vop_cal_lb_mode(int width, bool is_yuv)
+{
+        int lb_mode;
+
+        if (width > 2560)
+                lb_mode = LB_RGB_3840X2;
+        else if (width > 1920)
+                lb_mode = LB_RGB_2560X4;
+        else if (!is_yuv)
+                lb_mode = LB_RGB_1920X5;
+        else if (width > 1280)
+                lb_mode = LB_YUV_3840X5;
+        else
+                lb_mode = LB_YUV_2560X8;
+
+        return lb_mode;
+}
+
 #endif /* _ROCKCHIP_DRM_VOP_H */