diff options
Diffstat (limited to 'drivers/gpu/drm/imx/dcss/dcss-scaler.c')
| -rw-r--r-- | drivers/gpu/drm/imx/dcss/dcss-scaler.c | 826 |
1 files changed, 826 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dcss/dcss-scaler.c b/drivers/gpu/drm/imx/dcss/dcss-scaler.c new file mode 100644 index 000000000..cd21905de --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-scaler.c @@ -0,0 +1,826 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + * + * Scaling algorithms were contributed by Dzung Hoang <dzung.hoang@nxp.com> + */ + +#include <linux/device.h> +#include <linux/slab.h> + +#include "dcss-dev.h" + +#define DCSS_SCALER_CTRL 0x00 +#define SCALER_EN BIT(0) +#define REPEAT_EN BIT(4) +#define SCALE2MEM_EN BIT(8) +#define MEM2OFIFO_EN BIT(12) +#define DCSS_SCALER_OFIFO_CTRL 0x04 +#define OFIFO_LOW_THRES_POS 0 +#define OFIFO_LOW_THRES_MASK GENMASK(9, 0) +#define OFIFO_HIGH_THRES_POS 16 +#define OFIFO_HIGH_THRES_MASK GENMASK(25, 16) +#define UNDERRUN_DETECT_CLR BIT(26) +#define LOW_THRES_DETECT_CLR BIT(27) +#define HIGH_THRES_DETECT_CLR BIT(28) +#define UNDERRUN_DETECT_EN BIT(29) +#define LOW_THRES_DETECT_EN BIT(30) +#define HIGH_THRES_DETECT_EN BIT(31) +#define DCSS_SCALER_SDATA_CTRL 0x08 +#define YUV_EN BIT(0) +#define RTRAM_8LINES BIT(1) +#define Y_UV_BYTE_SWAP BIT(4) +#define A2R10G10B10_FORMAT_POS 8 +#define A2R10G10B10_FORMAT_MASK GENMASK(11, 8) +#define DCSS_SCALER_BIT_DEPTH 0x0C +#define LUM_BIT_DEPTH_POS 0 +#define LUM_BIT_DEPTH_MASK GENMASK(1, 0) +#define CHR_BIT_DEPTH_POS 4 +#define CHR_BIT_DEPTH_MASK GENMASK(5, 4) +#define DCSS_SCALER_SRC_FORMAT 0x10 +#define DCSS_SCALER_DST_FORMAT 0x14 +#define FORMAT_MASK GENMASK(1, 0) +#define DCSS_SCALER_SRC_LUM_RES 0x18 +#define DCSS_SCALER_SRC_CHR_RES 0x1C +#define DCSS_SCALER_DST_LUM_RES 0x20 +#define DCSS_SCALER_DST_CHR_RES 0x24 +#define WIDTH_POS 0 +#define WIDTH_MASK GENMASK(11, 0) +#define HEIGHT_POS 16 +#define HEIGHT_MASK GENMASK(27, 16) +#define DCSS_SCALER_V_LUM_START 0x48 +#define V_START_MASK GENMASK(15, 0) +#define DCSS_SCALER_V_LUM_INC 0x4C +#define V_INC_MASK GENMASK(15, 0) +#define DCSS_SCALER_H_LUM_START 0x50 +#define H_START_MASK GENMASK(18, 0) +#define DCSS_SCALER_H_LUM_INC 0x54 +#define H_INC_MASK GENMASK(15, 0) +#define DCSS_SCALER_V_CHR_START 0x58 +#define DCSS_SCALER_V_CHR_INC 0x5C +#define DCSS_SCALER_H_CHR_START 0x60 +#define DCSS_SCALER_H_CHR_INC 0x64 +#define DCSS_SCALER_COEF_VLUM 0x80 +#define DCSS_SCALER_COEF_HLUM 0x140 +#define DCSS_SCALER_COEF_VCHR 0x200 +#define DCSS_SCALER_COEF_HCHR 0x300 + +struct dcss_scaler_ch { + void __iomem *base_reg; + u32 base_ofs; + struct dcss_scaler *scl; + + u32 sdata_ctrl; + u32 scaler_ctrl; + + bool scaler_ctrl_chgd; + + u32 c_vstart; + u32 c_hstart; +}; + +struct dcss_scaler { + struct device *dev; + + struct dcss_ctxld *ctxld; + u32 ctx_id; + + struct dcss_scaler_ch ch[3]; +}; + +/* scaler coefficients generator */ +#define PSC_FRAC_BITS 30 +#define PSC_FRAC_SCALE BIT(PSC_FRAC_BITS) +#define PSC_BITS_FOR_PHASE 4 +#define PSC_NUM_PHASES 16 +#define PSC_STORED_PHASES (PSC_NUM_PHASES / 2 + 1) +#define PSC_NUM_TAPS 7 +#define PSC_NUM_TAPS_RGBA 5 +#define PSC_COEFF_PRECISION 10 +#define PSC_PHASE_FRACTION_BITS 13 +#define PSC_PHASE_MASK (PSC_NUM_PHASES - 1) +#define PSC_Q_FRACTION 19 +#define PSC_Q_ROUND_OFFSET (1 << (PSC_Q_FRACTION - 1)) + +/** + * mult_q() - Performs fixed-point multiplication. + * @A: multiplier + * @B: multiplicand + */ +static int mult_q(int A, int B) +{ + int result; + s64 temp; + + temp = (int64_t)A * (int64_t)B; + temp += PSC_Q_ROUND_OFFSET; + result = (int)(temp >> PSC_Q_FRACTION); + return result; +} + +/** + * div_q() - Performs fixed-point division. + * @A: dividend + * @B: divisor + */ +static int div_q(int A, int B) +{ + int result; + s64 temp; + + temp = (int64_t)A << PSC_Q_FRACTION; + if ((temp >= 0 && B >= 0) || (temp < 0 && B < 0)) + temp += B / 2; + else + temp -= B / 2; + + result = (int)(temp / B); + return result; +} + +/** + * exp_approx_q() - Compute approximation to exp(x) function using Taylor + * series. + * @x: fixed-point argument of exp function + */ +static int exp_approx_q(int x) +{ + int sum = 1 << PSC_Q_FRACTION; + int term = 1 << PSC_Q_FRACTION; + + term = mult_q(term, div_q(x, 1 << PSC_Q_FRACTION)); + sum += term; + term = mult_q(term, div_q(x, 2 << PSC_Q_FRACTION)); + sum += term; + term = mult_q(term, div_q(x, 3 << PSC_Q_FRACTION)); + sum += term; + term = mult_q(term, div_q(x, 4 << PSC_Q_FRACTION)); + sum += term; + + return sum; +} + +/** + * dcss_scaler_gaussian_filter() - Generate gaussian prototype filter. + * @fc_q: fixed-point cutoff frequency normalized to range [0, 1] + * @use_5_taps: indicates whether to use 5 taps or 7 taps + * @coef: output filter coefficients + */ +static void dcss_scaler_gaussian_filter(int fc_q, bool use_5_taps, + bool phase0_identity, + int coef[][PSC_NUM_TAPS]) +{ + int sigma_q, g0_q, g1_q, g2_q; + int tap_cnt1, tap_cnt2, tap_idx, phase_cnt; + int mid; + int phase; + int i; + int taps; + + if (use_5_taps) + for (phase = 0; phase < PSC_STORED_PHASES; phase++) { + coef[phase][0] = 0; + coef[phase][PSC_NUM_TAPS - 1] = 0; + } + + /* seed coefficient scanner */ + taps = use_5_taps ? PSC_NUM_TAPS_RGBA : PSC_NUM_TAPS; + mid = (PSC_NUM_PHASES * taps) / 2 - 1; + phase_cnt = (PSC_NUM_PHASES * (PSC_NUM_TAPS + 1)) / 2; + tap_cnt1 = (PSC_NUM_PHASES * PSC_NUM_TAPS) / 2; + tap_cnt2 = (PSC_NUM_PHASES * PSC_NUM_TAPS) / 2; + + /* seed gaussian filter generator */ + sigma_q = div_q(PSC_Q_ROUND_OFFSET, fc_q); + g0_q = 1 << PSC_Q_FRACTION; + g1_q = exp_approx_q(div_q(-PSC_Q_ROUND_OFFSET, + mult_q(sigma_q, sigma_q))); + g2_q = mult_q(g1_q, g1_q); + coef[phase_cnt & PSC_PHASE_MASK][tap_cnt1 >> PSC_BITS_FOR_PHASE] = g0_q; + + for (i = 0; i < mid; i++) { + phase_cnt++; + tap_cnt1--; + tap_cnt2++; + + g0_q = mult_q(g0_q, g1_q); + g1_q = mult_q(g1_q, g2_q); + + if ((phase_cnt & PSC_PHASE_MASK) <= 8) { + tap_idx = tap_cnt1 >> PSC_BITS_FOR_PHASE; + coef[phase_cnt & PSC_PHASE_MASK][tap_idx] = g0_q; + } + if (((-phase_cnt) & PSC_PHASE_MASK) <= 8) { + tap_idx = tap_cnt2 >> PSC_BITS_FOR_PHASE; + coef[(-phase_cnt) & PSC_PHASE_MASK][tap_idx] = g0_q; + } + } + + phase_cnt++; + tap_cnt1--; + coef[phase_cnt & PSC_PHASE_MASK][tap_cnt1 >> PSC_BITS_FOR_PHASE] = 0; + + /* override phase 0 with identity filter if specified */ + if (phase0_identity) + for (i = 0; i < PSC_NUM_TAPS; i++) + coef[0][i] = i == (PSC_NUM_TAPS >> 1) ? + (1 << PSC_COEFF_PRECISION) : 0; + + /* normalize coef */ + for (phase = 0; phase < PSC_STORED_PHASES; phase++) { + int sum = 0; + s64 ll_temp; + + for (i = 0; i < PSC_NUM_TAPS; i++) + sum += coef[phase][i]; + for (i = 0; i < PSC_NUM_TAPS; i++) { + ll_temp = coef[phase][i]; + ll_temp <<= PSC_COEFF_PRECISION; + ll_temp += sum >> 1; + ll_temp /= sum; + coef[phase][i] = (int)ll_temp; + } + } +} + +/** + * dcss_scaler_filter_design() - Compute filter coefficients using + * Gaussian filter. + * @src_length: length of input + * @dst_length: length of output + * @use_5_taps: 0 for 7 taps per phase, 1 for 5 taps + * @coef: output coefficients + */ +static void dcss_scaler_filter_design(int src_length, int dst_length, + bool use_5_taps, bool phase0_identity, + int coef[][PSC_NUM_TAPS]) +{ + int fc_q; + + /* compute cutoff frequency */ + if (dst_length >= src_length) + fc_q = div_q(1, PSC_NUM_PHASES); + else + fc_q = div_q(dst_length, src_length * PSC_NUM_PHASES); + + /* compute gaussian filter coefficients */ + dcss_scaler_gaussian_filter(fc_q, use_5_taps, phase0_identity, coef); +} + +static void dcss_scaler_write(struct dcss_scaler_ch *ch, u32 val, u32 ofs) +{ + struct dcss_scaler *scl = ch->scl; + + dcss_ctxld_write(scl->ctxld, scl->ctx_id, val, ch->base_ofs + ofs); +} + +static int dcss_scaler_ch_init_all(struct dcss_scaler *scl, + unsigned long scaler_base) +{ + struct dcss_scaler_ch *ch; + int i; + + for (i = 0; i < 3; i++) { + ch = &scl->ch[i]; + + ch->base_ofs = scaler_base + i * 0x400; + + ch->base_reg = ioremap(ch->base_ofs, SZ_4K); + if (!ch->base_reg) { + dev_err(scl->dev, "scaler: unable to remap ch base\n"); + return -ENOMEM; + } + + ch->scl = scl; + } + + return 0; +} + +int dcss_scaler_init(struct dcss_dev *dcss, unsigned long scaler_base) +{ + struct dcss_scaler *scaler; + + scaler = kzalloc(sizeof(*scaler), GFP_KERNEL); + if (!scaler) + return -ENOMEM; + + dcss->scaler = scaler; + scaler->dev = dcss->dev; + scaler->ctxld = dcss->ctxld; + scaler->ctx_id = CTX_SB_HP; + + if (dcss_scaler_ch_init_all(scaler, scaler_base)) { + int i; + + for (i = 0; i < 3; i++) { + if (scaler->ch[i].base_reg) + iounmap(scaler->ch[i].base_reg); + } + + kfree(scaler); + + return -ENOMEM; + } + + return 0; +} + +void dcss_scaler_exit(struct dcss_scaler *scl) +{ + int ch_no; + + for (ch_no = 0; ch_no < 3; ch_no++) { + struct dcss_scaler_ch *ch = &scl->ch[ch_no]; + + dcss_writel(0, ch->base_reg + DCSS_SCALER_CTRL); + + if (ch->base_reg) + iounmap(ch->base_reg); + } + + kfree(scl); +} + +void dcss_scaler_ch_enable(struct dcss_scaler *scl, int ch_num, bool en) +{ + struct dcss_scaler_ch *ch = &scl->ch[ch_num]; + u32 scaler_ctrl; + + scaler_ctrl = en ? SCALER_EN | REPEAT_EN : 0; + + if (en) + dcss_scaler_write(ch, ch->sdata_ctrl, DCSS_SCALER_SDATA_CTRL); + + if (ch->scaler_ctrl != scaler_ctrl) + ch->scaler_ctrl_chgd = true; + + ch->scaler_ctrl = scaler_ctrl; +} + +static void dcss_scaler_yuv_enable(struct dcss_scaler_ch *ch, bool en) +{ + ch->sdata_ctrl &= ~YUV_EN; + ch->sdata_ctrl |= en ? YUV_EN : 0; +} + +static void dcss_scaler_rtr_8lines_enable(struct dcss_scaler_ch *ch, bool en) +{ + ch->sdata_ctrl &= ~RTRAM_8LINES; + ch->sdata_ctrl |= en ? RTRAM_8LINES : 0; +} + +static void dcss_scaler_bit_depth_set(struct dcss_scaler_ch *ch, int depth) +{ + u32 val; + + val = depth == 30 ? 2 : 0; + + dcss_scaler_write(ch, + ((val << CHR_BIT_DEPTH_POS) & CHR_BIT_DEPTH_MASK) | + ((val << LUM_BIT_DEPTH_POS) & LUM_BIT_DEPTH_MASK), + DCSS_SCALER_BIT_DEPTH); +} + +enum buffer_format { + BUF_FMT_YUV420, + BUF_FMT_YUV422, + BUF_FMT_ARGB8888_YUV444, +}; + +enum chroma_location { + PSC_LOC_HORZ_0_VERT_1_OVER_4 = 0, + PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_4 = 1, + PSC_LOC_HORZ_0_VERT_0 = 2, + PSC_LOC_HORZ_1_OVER_4_VERT_0 = 3, + PSC_LOC_HORZ_0_VERT_1_OVER_2 = 4, + PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_2 = 5 +}; + +static void dcss_scaler_format_set(struct dcss_scaler_ch *ch, + enum buffer_format src_fmt, + enum buffer_format dst_fmt) +{ + dcss_scaler_write(ch, src_fmt, DCSS_SCALER_SRC_FORMAT); + dcss_scaler_write(ch, dst_fmt, DCSS_SCALER_DST_FORMAT); +} + +static void dcss_scaler_res_set(struct dcss_scaler_ch *ch, + int src_xres, int src_yres, + int dst_xres, int dst_yres, + u32 pix_format, enum buffer_format dst_format) +{ + u32 lsrc_xres, lsrc_yres, csrc_xres, csrc_yres; + u32 ldst_xres, ldst_yres, cdst_xres, cdst_yres; + bool src_is_444 = true; + + lsrc_xres = src_xres; + csrc_xres = src_xres; + lsrc_yres = src_yres; + csrc_yres = src_yres; + ldst_xres = dst_xres; + cdst_xres = dst_xres; + ldst_yres = dst_yres; + cdst_yres = dst_yres; + + if (pix_format == DRM_FORMAT_UYVY || pix_format == DRM_FORMAT_VYUY || + pix_format == DRM_FORMAT_YUYV || pix_format == DRM_FORMAT_YVYU) { + csrc_xres >>= 1; + src_is_444 = false; + } else if (pix_format == DRM_FORMAT_NV12 || + pix_format == DRM_FORMAT_NV21) { + csrc_xres >>= 1; + csrc_yres >>= 1; + src_is_444 = false; + } + + if (dst_format == BUF_FMT_YUV422) + cdst_xres >>= 1; + + /* for 4:4:4 to 4:2:2 conversion, source height should be 1 less */ + if (src_is_444 && dst_format == BUF_FMT_YUV422) { + lsrc_yres--; + csrc_yres--; + } + + dcss_scaler_write(ch, (((lsrc_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) | + (((lsrc_xres - 1) << WIDTH_POS) & WIDTH_MASK), + DCSS_SCALER_SRC_LUM_RES); + dcss_scaler_write(ch, (((csrc_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) | + (((csrc_xres - 1) << WIDTH_POS) & WIDTH_MASK), + DCSS_SCALER_SRC_CHR_RES); + dcss_scaler_write(ch, (((ldst_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) | + (((ldst_xres - 1) << WIDTH_POS) & WIDTH_MASK), + DCSS_SCALER_DST_LUM_RES); + dcss_scaler_write(ch, (((cdst_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) | + (((cdst_xres - 1) << WIDTH_POS) & WIDTH_MASK), + DCSS_SCALER_DST_CHR_RES); +} + +#define downscale_fp(factor, fp_pos) ((factor) << (fp_pos)) +#define upscale_fp(factor, fp_pos) ((1 << (fp_pos)) / (factor)) + +struct dcss_scaler_factors { + int downscale; + int upscale; +}; + +static const struct dcss_scaler_factors dcss_scaler_factors[] = { + {3, 8}, {5, 8}, {5, 8}, +}; + +static void dcss_scaler_fractions_set(struct dcss_scaler_ch *ch, + int src_xres, int src_yres, + int dst_xres, int dst_yres, + u32 src_format, u32 dst_format, + enum chroma_location src_chroma_loc) +{ + int src_c_xres, src_c_yres, dst_c_xres, dst_c_yres; + u32 l_vinc, l_hinc, c_vinc, c_hinc; + u32 c_vstart, c_hstart; + + src_c_xres = src_xres; + src_c_yres = src_yres; + dst_c_xres = dst_xres; + dst_c_yres = dst_yres; + + c_vstart = 0; + c_hstart = 0; + + /* adjustments for source chroma location */ + if (src_format == BUF_FMT_YUV420) { + /* vertical input chroma position adjustment */ + switch (src_chroma_loc) { + case PSC_LOC_HORZ_0_VERT_1_OVER_4: + case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_4: + /* + * move chroma up to first luma line + * (1/4 chroma input line spacing) + */ + c_vstart -= (1 << (PSC_PHASE_FRACTION_BITS - 2)); + break; + case PSC_LOC_HORZ_0_VERT_1_OVER_2: + case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_2: + /* + * move chroma up to first luma line + * (1/2 chroma input line spacing) + */ + c_vstart -= (1 << (PSC_PHASE_FRACTION_BITS - 1)); + break; + default: + break; + } + /* horizontal input chroma position adjustment */ + switch (src_chroma_loc) { + case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_4: + case PSC_LOC_HORZ_1_OVER_4_VERT_0: + case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_2: + /* move chroma left 1/4 chroma input sample spacing */ + c_hstart -= (1 << (PSC_PHASE_FRACTION_BITS - 2)); + break; + default: + break; + } + } + + /* adjustments to chroma resolution */ + if (src_format == BUF_FMT_YUV420) { + src_c_xres >>= 1; + src_c_yres >>= 1; + } else if (src_format == BUF_FMT_YUV422) { + src_c_xres >>= 1; + } + + if (dst_format == BUF_FMT_YUV422) + dst_c_xres >>= 1; + + l_vinc = ((src_yres << 13) + (dst_yres >> 1)) / dst_yres; + c_vinc = ((src_c_yres << 13) + (dst_c_yres >> 1)) / dst_c_yres; + l_hinc = ((src_xres << 13) + (dst_xres >> 1)) / dst_xres; + c_hinc = ((src_c_xres << 13) + (dst_c_xres >> 1)) / dst_c_xres; + + /* save chroma start phase */ + ch->c_vstart = c_vstart; + ch->c_hstart = c_hstart; + + dcss_scaler_write(ch, 0, DCSS_SCALER_V_LUM_START); + dcss_scaler_write(ch, l_vinc, DCSS_SCALER_V_LUM_INC); + + dcss_scaler_write(ch, 0, DCSS_SCALER_H_LUM_START); + dcss_scaler_write(ch, l_hinc, DCSS_SCALER_H_LUM_INC); + + dcss_scaler_write(ch, c_vstart, DCSS_SCALER_V_CHR_START); + dcss_scaler_write(ch, c_vinc, DCSS_SCALER_V_CHR_INC); + + dcss_scaler_write(ch, c_hstart, DCSS_SCALER_H_CHR_START); + dcss_scaler_write(ch, c_hinc, DCSS_SCALER_H_CHR_INC); +} + +int dcss_scaler_get_min_max_ratios(struct dcss_scaler *scl, int ch_num, + int *min, int *max) +{ + *min = upscale_fp(dcss_scaler_factors[ch_num].upscale, 16); + *max = downscale_fp(dcss_scaler_factors[ch_num].downscale, 16); + + return 0; +} + +static void dcss_scaler_program_5_coef_set(struct dcss_scaler_ch *ch, + int base_addr, + int coef[][PSC_NUM_TAPS]) +{ + int i, phase; + + for (i = 0; i < PSC_STORED_PHASES; i++) { + dcss_scaler_write(ch, ((coef[i][1] & 0xfff) << 16 | + (coef[i][2] & 0xfff) << 4 | + (coef[i][3] & 0xf00) >> 8), + base_addr + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[i][3] & 0x0ff) << 20 | + (coef[i][4] & 0xfff) << 8 | + (coef[i][5] & 0xff0) >> 4), + base_addr + 0x40 + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[i][5] & 0x00f) << 24), + base_addr + 0x80 + i * sizeof(u32)); + } + + /* reverse both phase and tap orderings */ + for (phase = (PSC_NUM_PHASES >> 1) - 1; + i < PSC_NUM_PHASES; i++, phase--) { + dcss_scaler_write(ch, ((coef[phase][5] & 0xfff) << 16 | + (coef[phase][4] & 0xfff) << 4 | + (coef[phase][3] & 0xf00) >> 8), + base_addr + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[phase][3] & 0x0ff) << 20 | + (coef[phase][2] & 0xfff) << 8 | + (coef[phase][1] & 0xff0) >> 4), + base_addr + 0x40 + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[phase][1] & 0x00f) << 24), + base_addr + 0x80 + i * sizeof(u32)); + } +} + +static void dcss_scaler_program_7_coef_set(struct dcss_scaler_ch *ch, + int base_addr, + int coef[][PSC_NUM_TAPS]) +{ + int i, phase; + + for (i = 0; i < PSC_STORED_PHASES; i++) { + dcss_scaler_write(ch, ((coef[i][0] & 0xfff) << 16 | + (coef[i][1] & 0xfff) << 4 | + (coef[i][2] & 0xf00) >> 8), + base_addr + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[i][2] & 0x0ff) << 20 | + (coef[i][3] & 0xfff) << 8 | + (coef[i][4] & 0xff0) >> 4), + base_addr + 0x40 + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[i][4] & 0x00f) << 24 | + (coef[i][5] & 0xfff) << 12 | + (coef[i][6] & 0xfff)), + base_addr + 0x80 + i * sizeof(u32)); + } + + /* reverse both phase and tap orderings */ + for (phase = (PSC_NUM_PHASES >> 1) - 1; + i < PSC_NUM_PHASES; i++, phase--) { + dcss_scaler_write(ch, ((coef[phase][6] & 0xfff) << 16 | + (coef[phase][5] & 0xfff) << 4 | + (coef[phase][4] & 0xf00) >> 8), + base_addr + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[phase][4] & 0x0ff) << 20 | + (coef[phase][3] & 0xfff) << 8 | + (coef[phase][2] & 0xff0) >> 4), + base_addr + 0x40 + i * sizeof(u32)); + dcss_scaler_write(ch, ((coef[phase][2] & 0x00f) << 24 | + (coef[phase][1] & 0xfff) << 12 | + (coef[phase][0] & 0xfff)), + base_addr + 0x80 + i * sizeof(u32)); + } +} + +static void dcss_scaler_yuv_coef_set(struct dcss_scaler_ch *ch, + enum buffer_format src_format, + enum buffer_format dst_format, + bool use_5_taps, + int src_xres, int src_yres, int dst_xres, + int dst_yres) +{ + int coef[PSC_STORED_PHASES][PSC_NUM_TAPS]; + bool program_5_taps = use_5_taps || + (dst_format == BUF_FMT_YUV422 && + src_format == BUF_FMT_ARGB8888_YUV444); + + /* horizontal luma */ + dcss_scaler_filter_design(src_xres, dst_xres, false, + src_xres == dst_xres, coef); + dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_HLUM, coef); + + /* vertical luma */ + dcss_scaler_filter_design(src_yres, dst_yres, program_5_taps, + src_yres == dst_yres, coef); + + if (program_5_taps) + dcss_scaler_program_5_coef_set(ch, DCSS_SCALER_COEF_VLUM, coef); + else + dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_VLUM, coef); + + /* adjust chroma resolution */ + if (src_format != BUF_FMT_ARGB8888_YUV444) + src_xres >>= 1; + if (src_format == BUF_FMT_YUV420) + src_yres >>= 1; + if (dst_format != BUF_FMT_ARGB8888_YUV444) + dst_xres >>= 1; + if (dst_format == BUF_FMT_YUV420) /* should not happen */ + dst_yres >>= 1; + + /* horizontal chroma */ + dcss_scaler_filter_design(src_xres, dst_xres, false, + (src_xres == dst_xres) && (ch->c_hstart == 0), + coef); + + dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_HCHR, coef); + + /* vertical chroma */ + dcss_scaler_filter_design(src_yres, dst_yres, program_5_taps, + (src_yres == dst_yres) && (ch->c_vstart == 0), + coef); + if (program_5_taps) + dcss_scaler_program_5_coef_set(ch, DCSS_SCALER_COEF_VCHR, coef); + else + dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_VCHR, coef); +} + +static void dcss_scaler_rgb_coef_set(struct dcss_scaler_ch *ch, + int src_xres, int src_yres, int dst_xres, + int dst_yres) +{ + int coef[PSC_STORED_PHASES][PSC_NUM_TAPS]; + + /* horizontal RGB */ + dcss_scaler_filter_design(src_xres, dst_xres, false, + src_xres == dst_xres, coef); + dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_HLUM, coef); + + /* vertical RGB */ + dcss_scaler_filter_design(src_yres, dst_yres, false, + src_yres == dst_yres, coef); + dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_VLUM, coef); +} + +static void dcss_scaler_set_rgb10_order(struct dcss_scaler_ch *ch, + const struct drm_format_info *format) +{ + u32 a2r10g10b10_format; + + if (format->is_yuv) + return; + + ch->sdata_ctrl &= ~A2R10G10B10_FORMAT_MASK; + + if (format->depth != 30) + return; + + switch (format->format) { + case DRM_FORMAT_ARGB2101010: + case DRM_FORMAT_XRGB2101010: + a2r10g10b10_format = 0; + break; + + case DRM_FORMAT_ABGR2101010: + case DRM_FORMAT_XBGR2101010: + a2r10g10b10_format = 5; + break; + + case DRM_FORMAT_RGBA1010102: + case DRM_FORMAT_RGBX1010102: + a2r10g10b10_format = 6; + break; + + case DRM_FORMAT_BGRA1010102: + case DRM_FORMAT_BGRX1010102: + a2r10g10b10_format = 11; + break; + + default: + a2r10g10b10_format = 0; + break; + } + + ch->sdata_ctrl |= a2r10g10b10_format << A2R10G10B10_FORMAT_POS; +} + +void dcss_scaler_setup(struct dcss_scaler *scl, int ch_num, + const struct drm_format_info *format, + int src_xres, int src_yres, int dst_xres, int dst_yres, + u32 vrefresh_hz) +{ + struct dcss_scaler_ch *ch = &scl->ch[ch_num]; + unsigned int pixel_depth = 0; + bool rtr_8line_en = false; + bool use_5_taps = false; + enum buffer_format src_format = BUF_FMT_ARGB8888_YUV444; + enum buffer_format dst_format = BUF_FMT_ARGB8888_YUV444; + u32 pix_format = format->format; + + if (format->is_yuv) { + dcss_scaler_yuv_enable(ch, true); + + if (pix_format == DRM_FORMAT_NV12 || + pix_format == DRM_FORMAT_NV21) { + rtr_8line_en = true; + src_format = BUF_FMT_YUV420; + } else if (pix_format == DRM_FORMAT_UYVY || + pix_format == DRM_FORMAT_VYUY || + pix_format == DRM_FORMAT_YUYV || + pix_format == DRM_FORMAT_YVYU) { + src_format = BUF_FMT_YUV422; + } + + use_5_taps = !rtr_8line_en; + } else { + dcss_scaler_yuv_enable(ch, false); + + pixel_depth = format->depth; + } + + dcss_scaler_fractions_set(ch, src_xres, src_yres, dst_xres, + dst_yres, src_format, dst_format, + PSC_LOC_HORZ_0_VERT_1_OVER_4); + + if (format->is_yuv) + dcss_scaler_yuv_coef_set(ch, src_format, dst_format, + use_5_taps, src_xres, src_yres, + dst_xres, dst_yres); + else + dcss_scaler_rgb_coef_set(ch, src_xres, src_yres, + dst_xres, dst_yres); + + dcss_scaler_rtr_8lines_enable(ch, rtr_8line_en); + dcss_scaler_bit_depth_set(ch, pixel_depth); + dcss_scaler_set_rgb10_order(ch, format); + dcss_scaler_format_set(ch, src_format, dst_format); + dcss_scaler_res_set(ch, src_xres, src_yres, dst_xres, dst_yres, + pix_format, dst_format); +} + +/* This function will be called from interrupt context. */ +void dcss_scaler_write_sclctrl(struct dcss_scaler *scl) +{ + int chnum; + + dcss_ctxld_assert_locked(scl->ctxld); + + for (chnum = 0; chnum < 3; chnum++) { + struct dcss_scaler_ch *ch = &scl->ch[chnum]; + + if (ch->scaler_ctrl_chgd) { + dcss_ctxld_write_irqsafe(scl->ctxld, scl->ctx_id, + ch->scaler_ctrl, + ch->base_ofs + + DCSS_SCALER_CTRL); + ch->scaler_ctrl_chgd = false; + } + } +} |