diff options
Diffstat (limited to 'drivers/gpu/drm/meson/meson_vclk.c')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_vclk.c | 900 |
1 files changed, 900 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_vclk.c b/drivers/gpu/drm/meson/meson_vclk.c new file mode 100644 index 000000000..ae5473257 --- /dev/null +++ b/drivers/gpu/drm/meson/meson_vclk.c @@ -0,0 +1,900 @@ +/* + * Copyright (C) 2016 BayLibre, SAS + * Author: Neil Armstrong <narmstrong@baylibre.com> + * Copyright (C) 2015 Amlogic, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <drm/drmP.h> +#include "meson_drv.h" +#include "meson_vclk.h" + +/** + * DOC: Video Clocks + * + * VCLK is the "Pixel Clock" frequency generator from a dedicated PLL. + * We handle the following encodings : + * + * - CVBS 27MHz generator via the VCLK2 to the VENCI and VDAC blocks + * - HDMI Pixel Clocks generation + * + * What is missing : + * + * - Genenate Pixel clocks for 2K/4K 10bit formats + * + * Clock generator scheme : + * + * .. code:: + * + * __________ _________ _____ + * | | | | | |--ENCI + * | HDMI PLL |-| PLL_DIV |--- VCLK--| |--ENCL + * |__________| |_________| \ | MUX |--ENCP + * --VCLK2-| |--VDAC + * |_____|--HDMI-TX + * + * Final clocks can take input for either VCLK or VCLK2, but + * VCLK is the preferred path for HDMI clocking and VCLK2 is the + * preferred path for CVBS VDAC clocking. + * + * VCLK and VCLK2 have fixed divided clocks paths for /1, /2, /4, /6 or /12. + * + * The PLL_DIV can achieve an additional fractional dividing like + * 1.5, 3.5, 3.75... to generate special 2K and 4K 10bit clocks. + */ + +/* HHI Registers */ +#define HHI_VID_PLL_CLK_DIV 0x1a0 /* 0x68 offset in data sheet */ +#define VID_PLL_EN BIT(19) +#define VID_PLL_BYPASS BIT(18) +#define VID_PLL_PRESET BIT(15) +#define HHI_VIID_CLK_DIV 0x128 /* 0x4a offset in data sheet */ +#define VCLK2_DIV_MASK 0xff +#define VCLK2_DIV_EN BIT(16) +#define VCLK2_DIV_RESET BIT(17) +#define CTS_VDAC_SEL_MASK (0xf << 28) +#define CTS_VDAC_SEL_SHIFT 28 +#define HHI_VIID_CLK_CNTL 0x12c /* 0x4b offset in data sheet */ +#define VCLK2_EN BIT(19) +#define VCLK2_SEL_MASK (0x7 << 16) +#define VCLK2_SEL_SHIFT 16 +#define VCLK2_SOFT_RESET BIT(15) +#define VCLK2_DIV1_EN BIT(0) +#define HHI_VID_CLK_DIV 0x164 /* 0x59 offset in data sheet */ +#define VCLK_DIV_MASK 0xff +#define VCLK_DIV_EN BIT(16) +#define VCLK_DIV_RESET BIT(17) +#define CTS_ENCP_SEL_MASK (0xf << 24) +#define CTS_ENCP_SEL_SHIFT 24 +#define CTS_ENCI_SEL_MASK (0xf << 28) +#define CTS_ENCI_SEL_SHIFT 28 +#define HHI_VID_CLK_CNTL 0x17c /* 0x5f offset in data sheet */ +#define VCLK_EN BIT(19) +#define VCLK_SEL_MASK (0x7 << 16) +#define VCLK_SEL_SHIFT 16 +#define VCLK_SOFT_RESET BIT(15) +#define VCLK_DIV1_EN BIT(0) +#define VCLK_DIV2_EN BIT(1) +#define VCLK_DIV4_EN BIT(2) +#define VCLK_DIV6_EN BIT(3) +#define VCLK_DIV12_EN BIT(4) +#define HHI_VID_CLK_CNTL2 0x194 /* 0x65 offset in data sheet */ +#define CTS_ENCI_EN BIT(0) +#define CTS_ENCP_EN BIT(2) +#define CTS_VDAC_EN BIT(4) +#define HDMI_TX_PIXEL_EN BIT(5) +#define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 offset in data sheet */ +#define HDMI_TX_PIXEL_SEL_MASK (0xf << 16) +#define HDMI_TX_PIXEL_SEL_SHIFT 16 +#define CTS_HDMI_SYS_SEL_MASK (0x7 << 9) +#define CTS_HDMI_SYS_DIV_MASK (0x7f) +#define CTS_HDMI_SYS_EN BIT(8) + +#define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */ +#define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */ + +#define HHI_HDMI_PLL_CNTL 0x320 /* 0xc8 offset in data sheet */ +#define HHI_HDMI_PLL_CNTL2 0x324 /* 0xc9 offset in data sheet */ +#define HHI_HDMI_PLL_CNTL3 0x328 /* 0xca offset in data sheet */ +#define HHI_HDMI_PLL_CNTL4 0x32C /* 0xcb offset in data sheet */ +#define HHI_HDMI_PLL_CNTL5 0x330 /* 0xcc offset in data sheet */ +#define HHI_HDMI_PLL_CNTL6 0x334 /* 0xcd offset in data sheet */ + +#define HDMI_PLL_RESET BIT(28) +#define HDMI_PLL_LOCK BIT(31) + +/* VID PLL Dividers */ +enum { + VID_PLL_DIV_1 = 0, + VID_PLL_DIV_2, + VID_PLL_DIV_2p5, + VID_PLL_DIV_3, + VID_PLL_DIV_3p5, + VID_PLL_DIV_3p75, + VID_PLL_DIV_4, + VID_PLL_DIV_5, + VID_PLL_DIV_6, + VID_PLL_DIV_6p25, + VID_PLL_DIV_7, + VID_PLL_DIV_7p5, + VID_PLL_DIV_12, + VID_PLL_DIV_14, + VID_PLL_DIV_15, +}; + +void meson_vid_pll_set(struct meson_drm *priv, unsigned int div) +{ + unsigned int shift_val = 0; + unsigned int shift_sel = 0; + + /* Disable vid_pll output clock */ + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_EN, 0); + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_PRESET, 0); + + switch (div) { + case VID_PLL_DIV_2: + shift_val = 0x0aaa; + shift_sel = 0; + break; + case VID_PLL_DIV_2p5: + shift_val = 0x5294; + shift_sel = 2; + break; + case VID_PLL_DIV_3: + shift_val = 0x0db6; + shift_sel = 0; + break; + case VID_PLL_DIV_3p5: + shift_val = 0x36cc; + shift_sel = 1; + break; + case VID_PLL_DIV_3p75: + shift_val = 0x6666; + shift_sel = 2; + break; + case VID_PLL_DIV_4: + shift_val = 0x0ccc; + shift_sel = 0; + break; + case VID_PLL_DIV_5: + shift_val = 0x739c; + shift_sel = 2; + break; + case VID_PLL_DIV_6: + shift_val = 0x0e38; + shift_sel = 0; + break; + case VID_PLL_DIV_6p25: + shift_val = 0x0000; + shift_sel = 3; + break; + case VID_PLL_DIV_7: + shift_val = 0x3c78; + shift_sel = 1; + break; + case VID_PLL_DIV_7p5: + shift_val = 0x78f0; + shift_sel = 2; + break; + case VID_PLL_DIV_12: + shift_val = 0x0fc0; + shift_sel = 0; + break; + case VID_PLL_DIV_14: + shift_val = 0x3f80; + shift_sel = 1; + break; + case VID_PLL_DIV_15: + shift_val = 0x7f80; + shift_sel = 2; + break; + } + + if (div == VID_PLL_DIV_1) + /* Enable vid_pll bypass to HDMI pll */ + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + VID_PLL_BYPASS, VID_PLL_BYPASS); + else { + /* Disable Bypass */ + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + VID_PLL_BYPASS, 0); + /* Clear sel */ + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + 3 << 16, 0); + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + VID_PLL_PRESET, 0); + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + 0x7fff, 0); + + /* Setup sel and val */ + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + 3 << 16, shift_sel << 16); + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + VID_PLL_PRESET, VID_PLL_PRESET); + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + 0x7fff, shift_val); + + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + VID_PLL_PRESET, 0); + } + + /* Enable the vid_pll output clock */ + regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, + VID_PLL_EN, VID_PLL_EN); +} + +/* + * Setup VCLK2 for 27MHz, and enable clocks for ENCI and VDAC + * + * TOFIX: Refactor into table to also handle HDMI frequency and paths + */ +static void meson_venci_cvbs_clock_config(struct meson_drm *priv) +{ + unsigned int val; + + /* Setup PLL to output 1.485GHz */ + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) { + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x5800023d); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x00404e00); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x0d5c5091); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x4800023d); + } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) { + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x4000027b); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb300); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0xa6212844); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c4d000c); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500); + + /* Reset PLL */ + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL, + HDMI_PLL_RESET, HDMI_PLL_RESET); + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL, + HDMI_PLL_RESET, 0); + } + + /* Poll for lock bit */ + regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL, val, + (val & HDMI_PLL_LOCK), 10, 0); + + /* Disable VCLK2 */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, VCLK2_EN, 0); + + /* Setup vid_pll to /1 */ + meson_vid_pll_set(priv, VID_PLL_DIV_1); + + /* Setup the VCLK2 divider value to achieve 27MHz */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV, + VCLK2_DIV_MASK, (55 - 1)); + + /* select vid_pll for vclk2 */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, + VCLK2_SEL_MASK, (4 << VCLK2_SEL_SHIFT)); + /* enable vclk2 gate */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, VCLK2_EN, VCLK2_EN); + + /* select vclk_div1 for enci */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCI_SEL_MASK, (8 << CTS_ENCI_SEL_SHIFT)); + /* select vclk_div1 for vdac */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV, + CTS_VDAC_SEL_MASK, (8 << CTS_VDAC_SEL_SHIFT)); + + /* release vclk2_div_reset and enable vclk2_div */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV, + VCLK2_DIV_EN | VCLK2_DIV_RESET, VCLK2_DIV_EN); + + /* enable vclk2_div1 gate */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, + VCLK2_DIV1_EN, VCLK2_DIV1_EN); + + /* reset vclk2 */ + regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, + VCLK2_SOFT_RESET, VCLK2_SOFT_RESET); + regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, + VCLK2_SOFT_RESET, 0); + + /* enable enci_clk */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2, + CTS_ENCI_EN, CTS_ENCI_EN); + /* enable vdac_clk */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2, + CTS_VDAC_EN, CTS_VDAC_EN); +} + +enum { +/* PLL O1 O2 O3 VP DV EN TX */ +/* 4320 /4 /4 /1 /5 /1 => /2 /2 */ + MESON_VCLK_HDMI_ENCI_54000 = 1, +/* 4320 /4 /4 /1 /5 /1 => /1 /2 */ + MESON_VCLK_HDMI_DDR_54000, +/* 2970 /4 /1 /1 /5 /1 => /1 /2 */ + MESON_VCLK_HDMI_DDR_148500, +/* 2970 /2 /2 /2 /5 /1 => /1 /1 */ + MESON_VCLK_HDMI_74250, +/* 2970 /1 /2 /2 /5 /1 => /1 /1 */ + MESON_VCLK_HDMI_148500, +/* 2970 /1 /1 /1 /5 /2 => /1 /1 */ + MESON_VCLK_HDMI_297000, +/* 5940 /1 /1 /2 /5 /1 => /1 /1 */ + MESON_VCLK_HDMI_594000 +}; + +struct meson_vclk_params { + unsigned int pll_base_freq; + unsigned int pll_od1; + unsigned int pll_od2; + unsigned int pll_od3; + unsigned int vid_pll_div; + unsigned int vclk_div; +} params[] = { + [MESON_VCLK_HDMI_ENCI_54000] = { + .pll_base_freq = 4320000, + .pll_od1 = 4, + .pll_od2 = 4, + .pll_od3 = 1, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 1, + }, + [MESON_VCLK_HDMI_DDR_54000] = { + .pll_base_freq = 4320000, + .pll_od1 = 4, + .pll_od2 = 4, + .pll_od3 = 1, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 1, + }, + [MESON_VCLK_HDMI_DDR_148500] = { + .pll_base_freq = 2970000, + .pll_od1 = 4, + .pll_od2 = 1, + .pll_od3 = 1, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 1, + }, + [MESON_VCLK_HDMI_74250] = { + .pll_base_freq = 2970000, + .pll_od1 = 2, + .pll_od2 = 2, + .pll_od3 = 2, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 1, + }, + [MESON_VCLK_HDMI_148500] = { + .pll_base_freq = 2970000, + .pll_od1 = 1, + .pll_od2 = 2, + .pll_od3 = 2, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 1, + }, + [MESON_VCLK_HDMI_297000] = { + .pll_base_freq = 2970000, + .pll_od1 = 1, + .pll_od2 = 1, + .pll_od3 = 1, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 2, + }, + [MESON_VCLK_HDMI_594000] = { + .pll_base_freq = 5940000, + .pll_od1 = 1, + .pll_od2 = 1, + .pll_od3 = 2, + .vid_pll_div = VID_PLL_DIV_5, + .vclk_div = 1, + }, +}; + +static inline unsigned int pll_od_to_reg(unsigned int od) +{ + switch (od) { + case 1: + return 0; + case 2: + return 1; + case 4: + return 2; + case 8: + return 3; + } + + /* Invalid */ + return 0; +} + +void meson_hdmi_pll_set_params(struct meson_drm *priv, unsigned int m, + unsigned int frac, unsigned int od1, + unsigned int od2, unsigned int od3) +{ + unsigned int val; + + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) { + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x58000200 | m); + if (frac) + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, + 0x00004000 | frac); + else + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, + 0x00000000); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x0d5c5091); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55); + + /* Enable and unreset */ + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL, + 0x7 << 28, 0x4 << 28); + + /* Poll for lock bit */ + regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL, + val, (val & HDMI_PLL_LOCK), 10, 0); + } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) { + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x40000200 | m); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb000 | frac); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x860f30c4); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c8e0000); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729); + regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500); + + /* Reset PLL */ + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL, + HDMI_PLL_RESET, HDMI_PLL_RESET); + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL, + HDMI_PLL_RESET, 0); + + /* Poll for lock bit */ + regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL, val, + (val & HDMI_PLL_LOCK), 10, 0); + } + + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2, + 3 << 16, pll_od_to_reg(od1) << 16); + else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3, + 3 << 21, pll_od_to_reg(od1) << 21); + + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2, + 3 << 22, pll_od_to_reg(od2) << 22); + else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3, + 3 << 23, pll_od_to_reg(od2) << 23); + + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2, + 3 << 18, pll_od_to_reg(od3) << 18); + else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) + regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3, + 3 << 19, pll_od_to_reg(od3) << 19); + +} + +#define XTAL_FREQ 24000 + +static unsigned int meson_hdmi_pll_get_m(struct meson_drm *priv, + unsigned int pll_freq) +{ + /* The GXBB PLL has a /2 pre-multiplier */ + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) + pll_freq /= 2; + + return pll_freq / XTAL_FREQ; +} + +#define HDMI_FRAC_MAX_GXBB 4096 +#define HDMI_FRAC_MAX_GXL 1024 + +static unsigned int meson_hdmi_pll_get_frac(struct meson_drm *priv, + unsigned int m, + unsigned int pll_freq) +{ + unsigned int parent_freq = XTAL_FREQ; + unsigned int frac_max = HDMI_FRAC_MAX_GXL; + unsigned int frac_m; + unsigned int frac; + + /* The GXBB PLL has a /2 pre-multiplier and a larger FRAC width */ + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) { + frac_max = HDMI_FRAC_MAX_GXBB; + parent_freq *= 2; + } + + /* We can have a perfect match !*/ + if (pll_freq / m == parent_freq && + pll_freq % m == 0) + return 0; + + frac = div_u64((u64)pll_freq * (u64)frac_max, parent_freq); + frac_m = m * frac_max; + if (frac_m > frac) + return frac_max; + frac -= frac_m; + + return min((u16)frac, (u16)(frac_max - 1)); +} + +static bool meson_hdmi_pll_validate_params(struct meson_drm *priv, + unsigned int m, + unsigned int frac) +{ + if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) { + /* Empiric supported min/max dividers */ + if (m < 53 || m > 123) + return false; + if (frac >= HDMI_FRAC_MAX_GXBB) + return false; + } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) { + /* Empiric supported min/max dividers */ + if (m < 106 || m > 247) + return false; + if (frac >= HDMI_FRAC_MAX_GXL) + return false; + } + + return true; +} + +static bool meson_hdmi_pll_find_params(struct meson_drm *priv, + unsigned int freq, + unsigned int *m, + unsigned int *frac, + unsigned int *od) +{ + /* Cycle from /16 to /2 */ + for (*od = 16 ; *od > 1 ; *od >>= 1) { + *m = meson_hdmi_pll_get_m(priv, freq * *od); + if (!*m) + continue; + *frac = meson_hdmi_pll_get_frac(priv, *m, freq * *od); + + DRM_DEBUG_DRIVER("PLL params for %dkHz: m=%x frac=%x od=%d\n", + freq, *m, *frac, *od); + + if (meson_hdmi_pll_validate_params(priv, *m, *frac)) + return true; + } + + return false; +} + +/* pll_freq is the frequency after the OD dividers */ +enum drm_mode_status +meson_vclk_dmt_supported_freq(struct meson_drm *priv, unsigned int freq) +{ + unsigned int od, m, frac; + + /* In DMT mode, path after PLL is always /10 */ + freq *= 10; + + if (meson_hdmi_pll_find_params(priv, freq, &m, &frac, &od)) + return MODE_OK; + + return MODE_CLOCK_RANGE; +} +EXPORT_SYMBOL_GPL(meson_vclk_dmt_supported_freq); + +/* pll_freq is the frequency after the OD dividers */ +static void meson_hdmi_pll_generic_set(struct meson_drm *priv, + unsigned int pll_freq) +{ + unsigned int od, m, frac, od1, od2, od3; + + if (meson_hdmi_pll_find_params(priv, pll_freq, &m, &frac, &od)) { + od3 = 1; + if (od < 4) { + od1 = 2; + od2 = 1; + } else { + od2 = od / 4; + od1 = od / od2; + } + + DRM_DEBUG_DRIVER("PLL params for %dkHz: m=%x frac=%x od=%d/%d/%d\n", + pll_freq, m, frac, od1, od2, od3); + + meson_hdmi_pll_set_params(priv, m, frac, od1, od2, od3); + + return; + } + + DRM_ERROR("Fatal, unable to find parameters for PLL freq %d\n", + pll_freq); +} + +static void meson_vclk_set(struct meson_drm *priv, unsigned int pll_base_freq, + unsigned int od1, unsigned int od2, unsigned int od3, + unsigned int vid_pll_div, unsigned int vclk_div, + unsigned int hdmi_tx_div, unsigned int venc_div, + bool hdmi_use_enci) +{ + /* Set HDMI-TX sys clock */ + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + CTS_HDMI_SYS_SEL_MASK, 0); + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + CTS_HDMI_SYS_DIV_MASK, 0); + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + CTS_HDMI_SYS_EN, CTS_HDMI_SYS_EN); + + /* Set HDMI PLL rate */ + if (!od1 && !od2 && !od3) { + meson_hdmi_pll_generic_set(priv, pll_base_freq); + } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) { + switch (pll_base_freq) { + case 2970000: + meson_hdmi_pll_set_params(priv, 0x3d, 0xe00, + od1, od2, od3); + break; + case 4320000: + meson_hdmi_pll_set_params(priv, 0x5a, 0, + od1, od2, od3); + break; + case 5940000: + meson_hdmi_pll_set_params(priv, 0x7b, 0xc00, + od1, od2, od3); + break; + } + } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") || + meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) { + switch (pll_base_freq) { + case 2970000: + meson_hdmi_pll_set_params(priv, 0x7b, 0x300, + od1, od2, od3); + break; + case 4320000: + meson_hdmi_pll_set_params(priv, 0xb4, 0, + od1, od2, od3); + break; + case 5940000: + meson_hdmi_pll_set_params(priv, 0xf7, 0x200, + od1, od2, od3); + break; + } + } + + /* Setup vid_pll divider */ + meson_vid_pll_set(priv, vid_pll_div); + + /* Set VCLK div */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_SEL_MASK, 0); + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + VCLK_DIV_MASK, vclk_div - 1); + + /* Set HDMI-TX source */ + switch (hdmi_tx_div) { + case 1: + /* enable vclk_div1 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV1_EN, VCLK_DIV1_EN); + + /* select vclk_div1 for HDMI-TX */ + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + HDMI_TX_PIXEL_SEL_MASK, 0); + break; + case 2: + /* enable vclk_div2 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV2_EN, VCLK_DIV2_EN); + + /* select vclk_div2 for HDMI-TX */ + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + HDMI_TX_PIXEL_SEL_MASK, 1 << HDMI_TX_PIXEL_SEL_SHIFT); + break; + case 4: + /* enable vclk_div4 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV4_EN, VCLK_DIV4_EN); + + /* select vclk_div4 for HDMI-TX */ + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + HDMI_TX_PIXEL_SEL_MASK, 2 << HDMI_TX_PIXEL_SEL_SHIFT); + break; + case 6: + /* enable vclk_div6 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV6_EN, VCLK_DIV6_EN); + + /* select vclk_div6 for HDMI-TX */ + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + HDMI_TX_PIXEL_SEL_MASK, 3 << HDMI_TX_PIXEL_SEL_SHIFT); + break; + case 12: + /* enable vclk_div12 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV12_EN, VCLK_DIV12_EN); + + /* select vclk_div12 for HDMI-TX */ + regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, + HDMI_TX_PIXEL_SEL_MASK, 4 << HDMI_TX_PIXEL_SEL_SHIFT); + break; + } + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2, + HDMI_TX_PIXEL_EN, HDMI_TX_PIXEL_EN); + + /* Set ENCI/ENCP Source */ + switch (venc_div) { + case 1: + /* enable vclk_div1 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV1_EN, VCLK_DIV1_EN); + + if (hdmi_use_enci) + /* select vclk_div1 for enci */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCI_SEL_MASK, 0); + else + /* select vclk_div1 for encp */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCP_SEL_MASK, 0); + break; + case 2: + /* enable vclk_div2 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV2_EN, VCLK_DIV2_EN); + + if (hdmi_use_enci) + /* select vclk_div2 for enci */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCI_SEL_MASK, 1 << CTS_ENCI_SEL_SHIFT); + else + /* select vclk_div2 for encp */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCP_SEL_MASK, 1 << CTS_ENCP_SEL_SHIFT); + break; + case 4: + /* enable vclk_div4 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV4_EN, VCLK_DIV4_EN); + + if (hdmi_use_enci) + /* select vclk_div4 for enci */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCI_SEL_MASK, 2 << CTS_ENCI_SEL_SHIFT); + else + /* select vclk_div4 for encp */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCP_SEL_MASK, 2 << CTS_ENCP_SEL_SHIFT); + break; + case 6: + /* enable vclk_div6 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV6_EN, VCLK_DIV6_EN); + + if (hdmi_use_enci) + /* select vclk_div6 for enci */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCI_SEL_MASK, 3 << CTS_ENCI_SEL_SHIFT); + else + /* select vclk_div6 for encp */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCP_SEL_MASK, 3 << CTS_ENCP_SEL_SHIFT); + break; + case 12: + /* enable vclk_div12 gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, + VCLK_DIV12_EN, VCLK_DIV12_EN); + + if (hdmi_use_enci) + /* select vclk_div12 for enci */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCI_SEL_MASK, 4 << CTS_ENCI_SEL_SHIFT); + else + /* select vclk_div12 for encp */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV, + CTS_ENCP_SEL_MASK, 4 << CTS_ENCP_SEL_SHIFT); + break; + } + + if (hdmi_use_enci) + /* Enable ENCI clock gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2, + CTS_ENCI_EN, CTS_ENCI_EN); + else + /* Enable ENCP clock gate */ + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2, + CTS_ENCP_EN, CTS_ENCP_EN); + + regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, VCLK_EN, VCLK_EN); +} + +void meson_vclk_setup(struct meson_drm *priv, unsigned int target, + unsigned int vclk_freq, unsigned int venc_freq, + unsigned int dac_freq, bool hdmi_use_enci) +{ + unsigned int freq; + unsigned int hdmi_tx_div; + unsigned int venc_div; + + if (target == MESON_VCLK_TARGET_CVBS) { + meson_venci_cvbs_clock_config(priv); + return; + } else if (target == MESON_VCLK_TARGET_DMT) { + /* The DMT clock path is fixed after the PLL: + * - automatic PLL freq + OD management + * - vid_pll_div = VID_PLL_DIV_5 + * - vclk_div = 2 + * - hdmi_tx_div = 1 + * - venc_div = 1 + * - encp encoder + */ + meson_vclk_set(priv, vclk_freq * 10, 0, 0, 0, + VID_PLL_DIV_5, 2, 1, 1, false); + return; + } + + hdmi_tx_div = vclk_freq / dac_freq; + + if (hdmi_tx_div == 0) { + pr_err("Fatal Error, invalid HDMI-TX freq %d\n", + dac_freq); + return; + } + + venc_div = vclk_freq / venc_freq; + + if (venc_div == 0) { + pr_err("Fatal Error, invalid HDMI venc freq %d\n", + venc_freq); + return; + } + + switch (vclk_freq) { + case 54000: + if (hdmi_use_enci) + freq = MESON_VCLK_HDMI_ENCI_54000; + else + freq = MESON_VCLK_HDMI_DDR_54000; + break; + case 74250: + freq = MESON_VCLK_HDMI_74250; + break; + case 148500: + if (dac_freq != 148500) + freq = MESON_VCLK_HDMI_DDR_148500; + else + freq = MESON_VCLK_HDMI_148500; + break; + case 297000: + freq = MESON_VCLK_HDMI_297000; + break; + case 594000: + freq = MESON_VCLK_HDMI_594000; + break; + default: + pr_err("Fatal Error, invalid HDMI vclk freq %d\n", + vclk_freq); + return; + } + + meson_vclk_set(priv, params[freq].pll_base_freq, + params[freq].pll_od1, params[freq].pll_od2, + params[freq].pll_od3, params[freq].vid_pll_div, + params[freq].vclk_div, hdmi_tx_div, venc_div, + hdmi_use_enci); +} +EXPORT_SYMBOL_GPL(meson_vclk_setup); |