diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/media/platform/ti/vpe/sc.c | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/drivers/media/platform/ti/vpe/sc.c b/drivers/media/platform/ti/vpe/sc.c new file mode 100644 index 0000000000..0202d27852 --- /dev/null +++ b/drivers/media/platform/ti/vpe/sc.c @@ -0,0 +1,306 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Scaler library + * + * Copyright (c) 2013 Texas Instruments Inc. + * + * David Griego, <dagriego@biglakesoftware.com> + * Dale Farnsworth, <dale@farnsworth.org> + * Archit Taneja, <archit@ti.com> + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include "sc.h" +#include "sc_coeff.h" + +void sc_dump_regs(struct sc_data *sc) +{ + struct device *dev = &sc->pdev->dev; + +#define DUMPREG(r) dev_dbg(dev, "%-35s %08x\n", #r, \ + ioread32(sc->base + CFG_##r)) + + dev_dbg(dev, "SC Registers @ %pa:\n", &sc->res->start); + + DUMPREG(SC0); + DUMPREG(SC1); + DUMPREG(SC2); + DUMPREG(SC3); + DUMPREG(SC4); + DUMPREG(SC5); + DUMPREG(SC6); + DUMPREG(SC8); + DUMPREG(SC9); + DUMPREG(SC10); + DUMPREG(SC11); + DUMPREG(SC12); + DUMPREG(SC13); + DUMPREG(SC17); + DUMPREG(SC18); + DUMPREG(SC19); + DUMPREG(SC20); + DUMPREG(SC21); + DUMPREG(SC22); + DUMPREG(SC23); + DUMPREG(SC24); + DUMPREG(SC25); + +#undef DUMPREG +} +EXPORT_SYMBOL(sc_dump_regs); + +/* + * set the horizontal scaler coefficients according to the ratio of output to + * input widths, after accounting for up to two levels of decimation + */ +void sc_set_hs_coeffs(struct sc_data *sc, void *addr, unsigned int src_w, + unsigned int dst_w) +{ + int sixteenths; + int idx; + int i, j; + u16 *coeff_h = addr; + const u16 *cp; + + if (dst_w > src_w) { + idx = HS_UP_SCALE; + } else { + if ((dst_w << 1) < src_w) + dst_w <<= 1; /* first level decimation */ + if ((dst_w << 1) < src_w) + dst_w <<= 1; /* second level decimation */ + + if (dst_w == src_w) { + idx = HS_LE_16_16_SCALE; + } else { + sixteenths = (dst_w << 4) / src_w; + if (sixteenths < 8) + sixteenths = 8; + idx = HS_LT_9_16_SCALE + sixteenths - 8; + } + } + + cp = scaler_hs_coeffs[idx]; + + for (i = 0; i < SC_NUM_PHASES * 2; i++) { + for (j = 0; j < SC_H_NUM_TAPS; j++) + *coeff_h++ = *cp++; + /* + * for each phase, the scaler expects space for 8 coefficients + * in it's memory. For the horizontal scaler, we copy the first + * 7 coefficients and skip the last slot to move to the next + * row to hold coefficients for the next phase + */ + coeff_h += SC_NUM_TAPS_MEM_ALIGN - SC_H_NUM_TAPS; + } + + sc->load_coeff_h = true; +} +EXPORT_SYMBOL(sc_set_hs_coeffs); + +/* + * set the vertical scaler coefficients according to the ratio of output to + * input heights + */ +void sc_set_vs_coeffs(struct sc_data *sc, void *addr, unsigned int src_h, + unsigned int dst_h) +{ + int sixteenths; + int idx; + int i, j; + u16 *coeff_v = addr; + const u16 *cp; + + if (dst_h > src_h) { + idx = VS_UP_SCALE; + } else if (dst_h == src_h) { + idx = VS_1_TO_1_SCALE; + } else { + sixteenths = (dst_h << 4) / src_h; + if (sixteenths < 8) + sixteenths = 8; + idx = VS_LT_9_16_SCALE + sixteenths - 8; + } + + cp = scaler_vs_coeffs[idx]; + + for (i = 0; i < SC_NUM_PHASES * 2; i++) { + for (j = 0; j < SC_V_NUM_TAPS; j++) + *coeff_v++ = *cp++; + /* + * for the vertical scaler, we copy the first 5 coefficients and + * skip the last 3 slots to move to the next row to hold + * coefficients for the next phase + */ + coeff_v += SC_NUM_TAPS_MEM_ALIGN - SC_V_NUM_TAPS; + } + + sc->load_coeff_v = true; +} +EXPORT_SYMBOL(sc_set_vs_coeffs); + +void sc_config_scaler(struct sc_data *sc, u32 *sc_reg0, u32 *sc_reg8, + u32 *sc_reg17, unsigned int src_w, unsigned int src_h, + unsigned int dst_w, unsigned int dst_h) +{ + struct device *dev = &sc->pdev->dev; + u32 val; + int dcm_x, dcm_shift; + bool use_rav; + unsigned long lltmp; + u32 lin_acc_inc, lin_acc_inc_u; + u32 col_acc_offset; + u16 factor = 0; + int row_acc_init_rav = 0, row_acc_init_rav_b = 0; + u32 row_acc_inc = 0, row_acc_offset = 0, row_acc_offset_b = 0; + /* + * location of SC register in payload memory with respect to the first + * register in the mmr address data block + */ + u32 *sc_reg9 = sc_reg8 + 1; + u32 *sc_reg12 = sc_reg8 + 4; + u32 *sc_reg13 = sc_reg8 + 5; + u32 *sc_reg24 = sc_reg17 + 7; + + val = sc_reg0[0]; + + /* clear all the features(they may get enabled elsewhere later) */ + val &= ~(CFG_SELFGEN_FID | CFG_TRIM | CFG_ENABLE_SIN2_VER_INTP | + CFG_INTERLACE_I | CFG_DCM_4X | CFG_DCM_2X | CFG_AUTO_HS | + CFG_ENABLE_EV | CFG_USE_RAV | CFG_INVT_FID | CFG_SC_BYPASS | + CFG_INTERLACE_O | CFG_Y_PK_EN | CFG_HP_BYPASS | CFG_LINEAR); + + if (src_w == dst_w && src_h == dst_h) { + val |= CFG_SC_BYPASS; + sc_reg0[0] = val; + return; + } + + /* we only support linear scaling for now */ + val |= CFG_LINEAR; + + /* configure horizontal scaler */ + + /* enable 2X or 4X decimation */ + dcm_x = src_w / dst_w; + if (dcm_x > 4) { + val |= CFG_DCM_4X; + dcm_shift = 2; + } else if (dcm_x > 2) { + val |= CFG_DCM_2X; + dcm_shift = 1; + } else { + dcm_shift = 0; + } + + lltmp = dst_w - 1; + lin_acc_inc = div64_u64(((u64)(src_w >> dcm_shift) - 1) << 24, lltmp); + lin_acc_inc_u = 0; + col_acc_offset = 0; + + dev_dbg(dev, "hs config: src_w = %d, dst_w = %d, decimation = %s, lin_acc_inc = %08x\n", + src_w, dst_w, dcm_shift == 2 ? "4x" : + (dcm_shift == 1 ? "2x" : "none"), lin_acc_inc); + + /* configure vertical scaler */ + + /* use RAV for vertical scaler if vertical downscaling is > 4x */ + if (dst_h < (src_h >> 2)) { + use_rav = true; + val |= CFG_USE_RAV; + } else { + use_rav = false; + } + + if (use_rav) { + /* use RAV */ + factor = (u16) ((dst_h << 10) / src_h); + + row_acc_init_rav = factor + ((1 + factor) >> 1); + if (row_acc_init_rav >= 1024) + row_acc_init_rav -= 1024; + + row_acc_init_rav_b = row_acc_init_rav + + (1 + (row_acc_init_rav >> 1)) - + (1024 >> 1); + + if (row_acc_init_rav_b < 0) { + row_acc_init_rav_b += row_acc_init_rav; + row_acc_init_rav *= 2; + } + + dev_dbg(dev, "vs config(RAV): src_h = %d, dst_h = %d, factor = %d, acc_init = %08x, acc_init_b = %08x\n", + src_h, dst_h, factor, row_acc_init_rav, + row_acc_init_rav_b); + } else { + /* use polyphase */ + row_acc_inc = ((src_h - 1) << 16) / (dst_h - 1); + row_acc_offset = 0; + row_acc_offset_b = 0; + + dev_dbg(dev, "vs config(POLY): src_h = %d, dst_h = %d,row_acc_inc = %08x\n", + src_h, dst_h, row_acc_inc); + } + + + sc_reg0[0] = val; + sc_reg0[1] = row_acc_inc; + sc_reg0[2] = row_acc_offset; + sc_reg0[3] = row_acc_offset_b; + + sc_reg0[4] = ((lin_acc_inc_u & CFG_LIN_ACC_INC_U_MASK) << + CFG_LIN_ACC_INC_U_SHIFT) | (dst_w << CFG_TAR_W_SHIFT) | + (dst_h << CFG_TAR_H_SHIFT); + + sc_reg0[5] = (src_w << CFG_SRC_W_SHIFT) | (src_h << CFG_SRC_H_SHIFT); + + sc_reg0[6] = (row_acc_init_rav_b << CFG_ROW_ACC_INIT_RAV_B_SHIFT) | + (row_acc_init_rav << CFG_ROW_ACC_INIT_RAV_SHIFT); + + *sc_reg9 = lin_acc_inc; + + *sc_reg12 = col_acc_offset << CFG_COL_ACC_OFFSET_SHIFT; + + *sc_reg13 = factor; + + *sc_reg24 = (src_w << CFG_ORG_W_SHIFT) | (src_h << CFG_ORG_H_SHIFT); +} +EXPORT_SYMBOL(sc_config_scaler); + +struct sc_data *sc_create(struct platform_device *pdev, const char *res_name) +{ + struct sc_data *sc; + + dev_dbg(&pdev->dev, "sc_create\n"); + + sc = devm_kzalloc(&pdev->dev, sizeof(*sc), GFP_KERNEL); + if (!sc) { + dev_err(&pdev->dev, "couldn't alloc sc_data\n"); + return ERR_PTR(-ENOMEM); + } + + sc->pdev = pdev; + + sc->res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name); + if (!sc->res) { + dev_err(&pdev->dev, "missing '%s' platform resources data\n", + res_name); + return ERR_PTR(-ENODEV); + } + + sc->base = devm_ioremap_resource(&pdev->dev, sc->res); + if (IS_ERR(sc->base)) + return ERR_CAST(sc->base); + + return sc; +} +EXPORT_SYMBOL(sc_create); + +MODULE_DESCRIPTION("TI VIP/VPE Scaler"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_LICENSE("GPL v2"); |