/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Designware High-Definition Multimedia Interface (HDMI) driveG */ #include <device/mmio.h> #include <console/console.h> #include <delay.h> #include <edid.h> #include <gpio.h> #include <stdint.h> #include <soc/addressmap.h> #include <soc/hdmi.h> #include <soc/grf.h> #include <soc/vop.h> #include <timer.h> #include "chip.h" #define AUDIO_SAMPLERATE_DEFAULT (48*KHz) #define hdmi_debug(x...) do { if (0) printk(BIOS_DEBUG, x); } while (0) struct rk3288_hdmi_regs * const hdmi_regs = (void *)HDMI_TX_BASE; struct tmds_n_cts { u32 tmds; u32 cts; u32 n; }; static const struct tmds_n_cts n_cts_table[] = { { .tmds = 25175, .n = 6144, .cts = 25175, }, { .tmds = 25200, .n = 6144, .cts = 25200, }, { .tmds = 27000, .n = 6144, .cts = 27000, }, { .tmds = 27027, .n = 6144, .cts = 27027, }, { .tmds = 40000, .n = 6144, .cts = 40000, }, { .tmds = 54000, .n = 6144, .cts = 54000, }, { .tmds = 54054, .n = 6144, .cts = 54054, }, { .tmds = 65000, .n = 6144, .cts = 65000, }, { .tmds = 74176, .n = 11648, .cts = 140625, }, { .tmds = 74250, .n = 6144, .cts = 74250, }, { .tmds = 83500, .n = 6144, .cts = 83500, }, { .tmds = 106500, .n = 6144, .cts = 106500, }, { .tmds = 108000, .n = 6144, .cts = 108000, }, { .tmds = 148352, .n = 5824, .cts = 140625, }, { .tmds = 148500, .n = 6144, .cts = 148500, }, { .tmds = 297000, .n = 5120, .cts = 247500, } }; struct hdmi_mpll_config { u64 mpixelclock; /* Mode of Operation and PLL Dividers Control Register */ u32 cpce; /* PLL Gmp Control Register */ u32 gmp; /* PLL Current COntrol Register */ u32 curr; }; struct hdmi_phy_config { u64 mpixelclock; u32 sym_ctr; /* clock symbol and transmitter control */ u32 term; /* transmission termination value */ u32 vlev_ctr; /* voltage level control */ }; static const struct hdmi_phy_config rockchip_phy_config[] = { { .mpixelclock = 74250, .sym_ctr = 0x8009, .term = 0x0004, .vlev_ctr = 0x0272, }, { .mpixelclock = 148500, .sym_ctr = 0x802b, .term = 0x0004, .vlev_ctr = 0x028d, }, { .mpixelclock = 297000, .sym_ctr = 0x8039, .term = 0x0005, .vlev_ctr = 0x028d, }, { .mpixelclock = ~0ul, .sym_ctr = 0x0000, .term = 0x0000, .vlev_ctr = 0x0000, } }; static const struct hdmi_mpll_config rockchip_mpll_cfg[] = { { .mpixelclock = 40000, .cpce = 0x00b3, .gmp = 0x0000, .curr = 0x0018, }, { .mpixelclock = 65000, .cpce = 0x0072, .gmp = 0x0001, .curr = 0x0028, }, { .mpixelclock = 66000, .cpce = 0x013e, .gmp = 0x0003, .curr = 0x0038, }, { .mpixelclock = 83500, .cpce = 0x0072, .gmp = 0x0001, .curr = 0x0028, }, { .mpixelclock = 146250, .cpce = 0x0051, .gmp = 0x0002, .curr = 0x0038, }, { .mpixelclock = 148500, .cpce = 0x0051, .gmp = 0x0003, .curr = 0x0000, }, { .mpixelclock = ~0ul, .cpce = 0x0051, .gmp = 0x0003, .curr = 0x0000, } }; static const u32 csc_coeff_default[3][4] = { { 0x2000, 0x0000, 0x0000, 0x0000 }, { 0x0000, 0x2000, 0x0000, 0x0000 }, { 0x0000, 0x0000, 0x2000, 0x0000 } }; static void hdmi_set_clock_regenerator(u32 n, u32 cts) { u8 cts3; u8 n3; /* first set ncts_atomic_write (if present) */ n3 = HDMI_AUD_N3_NCTS_ATOMIC_WRITE; write32(&hdmi_regs->aud_n3, n3); /* set cts_manual (if present) */ cts3 = HDMI_AUD_CTS3_CTS_MANUAL; cts3 |= HDMI_AUD_CTS3_N_SHIFT_1 << HDMI_AUD_CTS3_N_SHIFT_OFFSET; cts3 |= (cts >> 16) & HDMI_AUD_CTS3_AUDCTS19_16_MASK; /* write cts values; cts3 must be written first */ write32(&hdmi_regs->aud_cts3, cts3); write32(&hdmi_regs->aud_cts2, (cts >> 8) & 0xff); write32(&hdmi_regs->aud_cts1, cts & 0xff); /* write n values; n1 must be written last */ n3 |= (n >> 16) & HDMI_AUD_N3_AUDN19_16_MASK; write32(&hdmi_regs->aud_n3, n3); write32(&hdmi_regs->aud_n2, (n >> 8) & 0xff); write32(&hdmi_regs->aud_n1, n & 0xff); write32(&hdmi_regs->aud_inputclkfs, HDMI_AUD_INPUTCLKFS_128); } static int hdmi_lookup_n_cts(u32 pixel_clk) { int i; for (i = 0; i < ARRAY_SIZE(n_cts_table); i++) if (pixel_clk <= n_cts_table[i].tmds) break; if (i >= ARRAY_SIZE(n_cts_table)) return -1; return i; } static void hdmi_audio_set_samplerate(u32 pixel_clk) { u32 clk_n, clk_cts; int index; index = hdmi_lookup_n_cts(pixel_clk); if (index == -1) { hdmi_debug("audio not supported for pixel clk %d\n", pixel_clk); return; } clk_n = n_cts_table[index].n; clk_cts = n_cts_table[index].cts; hdmi_set_clock_regenerator(clk_n, clk_cts); } /* * this submodule is responsible for the video data synchronization. * for example, for rgb 4:4:4 input, the data map is defined as * pin{47~40} <==> r[7:0] * pin{31~24} <==> g[7:0] * pin{15~8} <==> b[7:0] */ static void hdmi_video_sample(void) { u32 color_format = 0x01; u8 val; val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE | ((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) & HDMI_TX_INVID0_VIDEO_MAPPING_MASK); write32(&hdmi_regs->tx_invid0, val); /* enable tx stuffing: when de is inactive, fix the output data to 0 */ val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE | HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE | HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE; write32(&hdmi_regs->tx_instuffing, val); write32(&hdmi_regs->tx_gydata0, 0x0); write32(&hdmi_regs->tx_gydata1, 0x0); write32(&hdmi_regs->tx_rcrdata0, 0x0); write32(&hdmi_regs->tx_rcrdata1, 0x0); write32(&hdmi_regs->tx_bcbdata0, 0x0); write32(&hdmi_regs->tx_bcbdata1, 0x0); } static void hdmi_update_csc_coeffs(void) { u32 i, j; u32 csc_scale = 1; /* the csc registers are sequential, alternating msb then lsb */ for (i = 0; i < ARRAY_SIZE(csc_coeff_default); i++) { for (j = 0; j < ARRAY_SIZE(csc_coeff_default[0]); j++) { u32 coeff = csc_coeff_default[i][j]; write32(&hdmi_regs->csc_coef[i][j].msb, coeff >> 8); write32(&hdmi_regs->csc_coef[i][j].lsb, coeff & 0xff); } } clrsetbits32(&hdmi_regs->csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK, csc_scale); } static void hdmi_video_csc(void) { u32 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP; u32 interpolation = HDMI_CSC_CFG_INTMODE_DISABLE; /* configure the csc registers */ write32(&hdmi_regs->csc_cfg, interpolation); clrsetbits32(&hdmi_regs->csc_scale, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK, color_depth); hdmi_update_csc_coeffs(); } static void hdmi_video_packetize(void) { u32 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS; u32 remap_size = HDMI_VP_REMAP_YCC422_16BIT; u32 color_depth = 0; u8 val, vp_conf; /* set the packetizer registers */ val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) & HDMI_VP_PR_CD_COLOR_DEPTH_MASK) | ((0 << HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) & HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK); write32(&hdmi_regs->vp_pr_cd, val); clrsetbits32(&hdmi_regs->vp_stuff, HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE); /* data from pixel repeater block */ vp_conf = HDMI_VP_CONF_PR_EN_DISABLE | HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER; clrsetbits32(&hdmi_regs->vp_conf, HDMI_VP_CONF_PR_EN_MASK | HDMI_VP_CONF_BYPASS_SELECT_MASK, vp_conf); clrsetbits32(&hdmi_regs->vp_stuff, HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET); write32(&hdmi_regs->vp_remap, remap_size); vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE | HDMI_VP_CONF_PP_EN_DISABLE | HDMI_VP_CONF_YCC422_EN_DISABLE; clrsetbits32(&hdmi_regs->vp_conf, HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK | HDMI_VP_CONF_YCC422_EN_MASK, vp_conf); clrsetbits32(&hdmi_regs->vp_stuff, HDMI_VP_STUFF_PP_STUFFING_MASK | HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE | HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE); clrsetbits32(&hdmi_regs->vp_conf, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK, output_select); } static inline void hdmi_phy_test_clear(u8 bit) { clrsetbits32(&hdmi_regs->phy_tst0, HDMI_PHY_TST0_TSTCLR_MASK, bit << HDMI_PHY_TST0_TSTCLR_OFFSET); } static int hdmi_phy_wait_i2c_done(u32 msec) { struct stopwatch phyi2c_done; u32 val; stopwatch_init_msecs_expire(&phyi2c_done, msec); do { val = read32(&hdmi_regs->ih_i2cmphy_stat0); if (val & 0x3) { write32(&hdmi_regs->ih_i2cmphy_stat0, val); return 0; } udelay(100); } while (!stopwatch_expired(&phyi2c_done)); return 1; } static void hdmi_phy_i2c_write(u16 data, u8 addr) { write32(&hdmi_regs->ih_i2cmphy_stat0, 0xff); write32(&hdmi_regs->phy_i2cm_address_addr, addr); write32(&hdmi_regs->phy_i2cm_datao_1_addr, (u8)(data >> 8)); write32(&hdmi_regs->phy_i2cm_datao_0_addr, (u8)(data >> 0)); write32(&hdmi_regs->phy_i2cm_operation_addr, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE); hdmi_phy_wait_i2c_done(1000); } static void hdmi_phy_enable_power(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_PDZ_MASK, enable << HDMI_PHY_CONF0_PDZ_OFFSET); } static void hdmi_phy_enable_tmds(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_ENTMDS_MASK, enable << HDMI_PHY_CONF0_ENTMDS_OFFSET); } static void hdmi_phy_enable_spare(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_SPARECTRL_MASK, enable << HDMI_PHY_CONF0_SPARECTRL_OFFSET); } static void hdmi_phy_gen2_pddq(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_GEN2_PDDQ_MASK, enable << HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET); } static void hdmi_phy_gen2_txpwron(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_GEN2_TXPWRON_MASK, enable << HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET); } static void hdmi_phy_sel_data_en_pol(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_SELDATAENPOL_MASK, enable << HDMI_PHY_CONF0_SELDATAENPOL_OFFSET); } static void hdmi_phy_sel_interface_control(u8 enable) { clrsetbits32(&hdmi_regs->phy_conf0, HDMI_PHY_CONF0_SELDIPIF_MASK, enable << HDMI_PHY_CONF0_SELDIPIF_OFFSET); } static int hdmi_phy_configure(u32 mpixelclock) { struct stopwatch pll_ready; u8 i, val; write32(&hdmi_regs->mc_flowctrl, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS); /* gen2 tx power off */ hdmi_phy_gen2_txpwron(0); /* gen2 pddq */ hdmi_phy_gen2_pddq(1); /* phy reset */ write32(&hdmi_regs->mc_phyrstz, HDMI_MC_PHYRSTZ_DEASSERT); write32(&hdmi_regs->mc_phyrstz, HDMI_MC_PHYRSTZ_ASSERT); write32(&hdmi_regs->mc_heacphy_rst, HDMI_MC_HEACPHY_RST_ASSERT); hdmi_phy_test_clear(1); write32(&hdmi_regs->phy_i2cm_slave_addr, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2); hdmi_phy_test_clear(0); /* pll/mpll cfg - always match on final entry */ for (i = 0; rockchip_mpll_cfg[i].mpixelclock != (~0ul); i++) if (mpixelclock <= rockchip_mpll_cfg[i].mpixelclock) break; hdmi_phy_i2c_write(rockchip_mpll_cfg[i].cpce, PHY_OPMODE_PLLCFG); hdmi_phy_i2c_write(rockchip_mpll_cfg[i].gmp, PHY_PLLGMPCTRL); hdmi_phy_i2c_write(rockchip_mpll_cfg[i].curr, PHY_PLLCURRCTRL); hdmi_phy_i2c_write(0x0000, PHY_PLLPHBYCTRL); hdmi_phy_i2c_write(0x0006, PHY_PLLCLKBISTPHASE); for (i = 0; rockchip_phy_config[i].mpixelclock != (~0ul); i++) if (mpixelclock <= rockchip_phy_config[i].mpixelclock) break; /* * resistance term 133ohm cfg * preemp cgf 0.00 * tx/ck lvl 10 */ hdmi_phy_i2c_write(rockchip_phy_config[i].term, PHY_TXTERM); hdmi_phy_i2c_write(rockchip_phy_config[i].sym_ctr, PHY_CKSYMTXCTRL); hdmi_phy_i2c_write(rockchip_phy_config[i].vlev_ctr, PHY_VLEVCTRL); /* remove clk term */ hdmi_phy_i2c_write(0x8000, PHY_CKCALCTRL); hdmi_phy_enable_power(1); /* toggle tmds enable */ hdmi_phy_enable_tmds(0); hdmi_phy_enable_tmds(1); /* gen2 tx power on */ hdmi_phy_gen2_txpwron(1); hdmi_phy_gen2_pddq(0); hdmi_phy_enable_spare(1); /* wait for phy pll lock */ stopwatch_init_msecs_expire(&pll_ready, 5); do { val = read32(&hdmi_regs->phy_stat0); if (!(val & HDMI_PHY_TX_PHY_LOCK)) return 0; udelay(100); } while (!stopwatch_expired(&pll_ready)); return -1; } static int hdmi_phy_init(u32 mpixelclock) { int i, ret; /* hdmi phy spec says to do the phy initialization sequence twice */ for (i = 0; i < 2; i++) { hdmi_phy_sel_data_en_pol(1); hdmi_phy_sel_interface_control(0); hdmi_phy_enable_tmds(0); hdmi_phy_enable_power(0); /* enable csc */ ret = hdmi_phy_configure(mpixelclock); if (ret) { hdmi_debug("hdmi phy config failure %d\n", ret); return ret; } } return 0; } static void hdmi_av_composer(const struct edid *edid) { u8 mdataenablepolarity = 1; u8 inv_val; /* set up hdmi_fc_invidconf */ inv_val = HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE; inv_val |= ((edid->mode.pvsync == '+') ? HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH : HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW); inv_val |= ((edid->mode.phsync == '+') ? HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH : HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW); inv_val |= (mdataenablepolarity ? HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH : HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW); inv_val |= (edid->hdmi_monitor_detected ? HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE : HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE); inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW; inv_val |= HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE; write32(&hdmi_regs->fc_invidconf, inv_val); /* set up horizontal active pixel width */ write32(&hdmi_regs->fc_inhactv1, edid->mode.ha >> 8); write32(&hdmi_regs->fc_inhactv0, edid->mode.ha); /* set up vertical active lines */ write32(&hdmi_regs->fc_invactv1, edid->mode.va >> 8); write32(&hdmi_regs->fc_invactv0, edid->mode.va); /* set up horizontal blanking pixel region width */ write32(&hdmi_regs->fc_inhblank1, edid->mode.hbl >> 8); write32(&hdmi_regs->fc_inhblank0, edid->mode.hbl); /* set up vertical blanking pixel region width */ write32(&hdmi_regs->fc_invblank, edid->mode.vbl); /* set up hsync active edge delay width (in pixel clks) */ write32(&hdmi_regs->fc_hsyncindelay1, edid->mode.hso >> 8); write32(&hdmi_regs->fc_hsyncindelay0, edid->mode.hso); /* set up vsync active edge delay (in lines) */ write32(&hdmi_regs->fc_vsyncindelay, edid->mode.vso); /* set up hsync active pulse width (in pixel clks) */ write32(&hdmi_regs->fc_hsyncinwidth1, edid->mode.hspw >> 8); write32(&hdmi_regs->fc_hsyncinwidth0, edid->mode.hspw); /* set up vsync active edge delay (in lines) */ write32(&hdmi_regs->fc_vsyncinwidth, edid->mode.vspw); } /* hdmi initialization step b.4 */ static void hdmi_enable_video_path(void) { u8 clkdis; /* control period minimum duration */ write32(&hdmi_regs->fc_ctrldur, 12); write32(&hdmi_regs->fc_exctrldur, 32); write32(&hdmi_regs->fc_exctrlspac, 1); /* set to fill tmds data channels */ write32(&hdmi_regs->fc_ch0pream, 0x0b); write32(&hdmi_regs->fc_ch1pream, 0x16); write32(&hdmi_regs->fc_ch2pream, 0x21); /* enable pixel clock and tmds data path */ clkdis = 0x7f; clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE; write32(&hdmi_regs->mc_clkdis, clkdis); clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE; write32(&hdmi_regs->mc_clkdis, clkdis); clkdis &= ~HDMI_MC_CLKDIS_AUDCLK_DISABLE; write32(&hdmi_regs->mc_clkdis, clkdis); } /* workaround to clear the overflow condition */ static void hdmi_clear_overflow(void) { u8 val, count; /* tmds software reset */ write32(&hdmi_regs->mc_swrstz, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ); val = read32(&hdmi_regs->fc_invidconf); for (count = 0; count < 4; count++) write32(&hdmi_regs->fc_invidconf, val); } static void hdmi_audio_set_format(void) { write32(&hdmi_regs->aud_conf0, HDMI_AUD_CONF0_I2S_SELECT | HDMI_AUD_CONF0_I2S_IN_EN_0); write32(&hdmi_regs->aud_conf1, HDMI_AUD_CONF1_I2S_MODE_STANDARD_MODE | HDMI_AUD_CONF1_I2S_WIDTH_16BIT); write32(&hdmi_regs->aud_conf2, 0x00); } static void hdmi_audio_fifo_reset(void) { write32(&hdmi_regs->mc_swrstz, (u8)~HDMI_MC_SWRSTZ_II2SSWRST_REQ); write32(&hdmi_regs->aud_conf0, HDMI_AUD_CONF0_SW_AUDIO_FIFO_RST); write32(&hdmi_regs->aud_int, 0x00); write32(&hdmi_regs->aud_int1, 0x00); } static int hdmi_setup(const struct edid *edid) { int ret; hdmi_debug("hdmi, mode info : clock %d hdis %d vdis %d\n", edid->mode.pixel_clock, edid->mode.ha, edid->mode.va); hdmi_av_composer(edid); ret = hdmi_phy_init(edid->mode.pixel_clock); if (ret) return ret; hdmi_enable_video_path(); hdmi_audio_fifo_reset(); hdmi_audio_set_format(); hdmi_audio_set_samplerate(edid->mode.pixel_clock); hdmi_video_packetize(); hdmi_video_csc(); hdmi_video_sample(); hdmi_clear_overflow(); return 0; } static void hdmi_init_interrupt(void) { u8 ih_mute; /* * boot up defaults are: * hdmi_ih_mute = 0x03 (disabled) * hdmi_ih_mute_* = 0x00 (enabled) * * disable top level interrupt bits in hdmi block */ ih_mute = read32(&hdmi_regs->ih_mute) | HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT | HDMI_IH_MUTE_MUTE_ALL_INTERRUPT; write32(&hdmi_regs->ih_mute, ih_mute); /* enable i2c master done irq */ write32(&hdmi_regs->i2cm_int, ~0x04); /* enable i2c client nack % arbitration error irq */ write32(&hdmi_regs->i2cm_ctlint, ~0x44); /* enable phy i2cm done irq */ write32(&hdmi_regs->phy_i2cm_int_addr, HDMI_PHY_I2CM_INT_ADDR_DONE_POL); /* enable phy i2cm nack & arbitration error irq */ write32(&hdmi_regs->phy_i2cm_ctlint_addr, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL | HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL); /* enable cable hot plug irq */ write32(&hdmi_regs->phy_mask0, (u8)~HDMI_PHY_HPD); /* clear hotplug interrupts */ write32(&hdmi_regs->ih_phy_stat0, HDMI_IH_PHY_STAT0_HPD); } static u8 hdmi_get_plug_in_status(void) { u8 val = read32(&hdmi_regs->phy_stat0) & HDMI_PHY_HPD; return !!(val); } static int hdmi_wait_for_hpd(void) { struct stopwatch hpd; stopwatch_init_msecs_expire(&hpd, 30000); do { if (hdmi_get_plug_in_status()) return 0; udelay(100); } while (!stopwatch_expired(&hpd)); return -1; } static int hdmi_ddc_wait_i2c_done(int msec) { struct stopwatch ddci2c_done; u32 val; stopwatch_init_msecs_expire(&ddci2c_done, msec); do { val = read32(&hdmi_regs->ih_i2cm_stat0); if (val & 0x2) { write32(&hdmi_regs->ih_i2cm_stat0, val); return 0; } udelay(100); } while (!stopwatch_expired(&ddci2c_done)); return 1; } static void hdmi_ddc_reset(void) { clrsetbits32(&hdmi_regs->i2cm_softrstz, HDMI_I2CM_SOFTRSTZ, HDMI_I2CM_SOFTRSTZ); } static int hdmi_read_edid(int block, u8 *buff) { int shift = (block % 2) * 0x80; int edid_read_err = 0; u32 trytime = 5; u32 n, j, val; /* set ddc i2c clk which derived from ddc_clk to 100kHz */ write32(&hdmi_regs->i2cm_ss_scl_hcnt_0_addr, 0x7a); write32(&hdmi_regs->i2cm_ss_scl_lcnt_0_addr, 0x8d); clrsetbits32(&hdmi_regs->i2cm_div, HDMI_I2CM_DIV_FAST_STD_MODE, HDMI_I2CM_DIV_STD_MODE); write32(&hdmi_regs->i2cm_slave, HDMI_I2CM_SLAVE_DDC_ADDR); write32(&hdmi_regs->i2cm_segaddr, HDMI_I2CM_SEGADDR_DDC); write32(&hdmi_regs->i2cm_segptr, block >> 1); while (trytime--) { edid_read_err = 0; for (n = 0; n < HDMI_EDID_BLOCK_SIZE/8; n++) { write32(&hdmi_regs->i2cmess, shift + 8 * n); if (block == 0) clrsetbits32(&hdmi_regs->i2cm_operation, HDMI_I2CM_OPT_RD8, HDMI_I2CM_OPT_RD8); else clrsetbits32(&hdmi_regs->i2cm_operation, HDMI_I2CM_OPT_RD8_EXT, HDMI_I2CM_OPT_RD8_EXT); if (hdmi_ddc_wait_i2c_done(10)) { hdmi_ddc_reset(); edid_read_err = 1; break; } for (j = 0; j < 8; j++) { val = read32(&hdmi_regs->i2cm_buf0 + j); buff[8 * n + j] = val; } } if (!edid_read_err) break; } return edid_read_err; } int rk_hdmi_get_edid(struct edid *edid) { u8 edid_buf[HDMI_EDID_BLOCK_SIZE * 2]; u32 edid_size = HDMI_EDID_BLOCK_SIZE; gpio_t hdmi_i2c_sda = GPIO(7, C, 3); gpio_t hdmi_i2c_scl = GPIO(7, C, 4); int ret; /* If SDA is low, try to clock once to fix it */ gpio_input_pullup(hdmi_i2c_sda); if (gpio_get(hdmi_i2c_sda) == 0) { gpio_output(hdmi_i2c_scl, 0); udelay(1000); gpio_input_pullup(hdmi_i2c_scl); udelay(1000); } /* HDMI I2C */ write32(&rk3288_grf->iomux_i2c5sda, IOMUX_HDMI_EDP_I2C_SDA); write32(&rk3288_grf->iomux_i2c5scl, IOMUX_HDMI_EDP_I2C_SCL); ret = hdmi_read_edid(0, edid_buf); if (ret) { hdmi_debug("failed to read edid.\n"); return -1; } if (edid_buf[0x7e] != 0) { hdmi_read_edid(1, edid_buf + HDMI_EDID_BLOCK_SIZE); edid_size += HDMI_EDID_BLOCK_SIZE; } /* Assume usage of HDMI implies an external display in which case * we should be lenient about errors that the EDID decoder finds. */ if (decode_edid(edid_buf, edid_size, edid) != EDID_CONFORMANT) hdmi_debug("failed to decode edid.\n"); /* Try 480p for best compatibility. */ if (set_display_mode(edid, EDID_MODE_640x480_60Hz)) hdmi_debug("failed to set mode to 640x480@60Hz\n"); return 0; } int rk_hdmi_enable(const struct edid *edid) { hdmi_setup(edid); return 0; } int rk_hdmi_init(u32 vop_id) { int ret; u32 val; /* hdmi source select hdmi controller */ write32(&rk3288_grf->soc_con6, RK_SETBITS(1 << 15)); /* hdmi data from vop id */ val = (vop_id == 1) ? RK_SETBITS(1 << 4) : RK_CLRBITS(1 << 4); write32(&rk3288_grf->soc_con6, val); ret = hdmi_wait_for_hpd(); if (ret < 0) { hdmi_debug("hdmi can not get hpd signal\n"); return -1; } hdmi_init_interrupt(); hdmi_debug("hdmi init success\n"); return 0; }