/* * edid.c: tegra edid functions. * * Copyright (C) 2010 Google, Inc. * Author: Erik Gilling * * Copyright (c) 2010-2021, NVIDIA CORPORATION, All rights reserved. * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * 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. * */ #include #include #include #include #include #include #include #include "edid.h" #include "dc_priv.h" #include "hdmi2.0.h" struct tegra_edid_pvt { struct kref refcnt; struct tegra_edid_hdmi_eld eld; bool support_stereo; bool support_underscan; bool support_audio; bool scdc_present; bool db420_present; bool hfvsdb_present; bool support_yuv422; bool support_yuv444; bool rgb_quant_selectable; bool yuv_quant_selectable; u16 color_depth_flag; u16 max_tmds_char_rate_hf_mhz; u16 max_tmds_char_rate_hllc_mhz; u16 colorimetry; u16 min_vrr_fps; u8 hdr_pckt_len; bool hdr_eotf_smpte2084; u8 hdr_eotf; u8 hdr_static_metadata; u8 hdr_desired_max_luma; u8 hdr_desired_max_frame_avg_luma; u8 hdr_desired_min_luma; u32 quirks; /* Note: dc_edid must remain the last member */ struct tegra_dc_edid dc_edid; }; /* 720p 60Hz EDID */ static const char default_720p_edid[256] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x3a, 0xc4, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x1b, 0x01, 0x03, 0x80, 0x59, 0x32, 0x8c, 0x0a, 0xe2, 0xbd, 0xa1, 0x5b, 0x4a, 0x98, 0x24, 0x15, 0x47, 0x4a, 0x20, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 0x75, 0xf2, 0x31, 0x00, 0x00, 0x1e, 0x01, 0x1d, 0x00, 0xbc, 0x52, 0xd0, 0x1e, 0x20, 0xb8, 0x28, 0x55, 0x40, 0x75, 0xf2, 0x31, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x32, 0x3d, 0x0f, 0x2e, 0x08, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4e, 0x56, 0x49, 0x44, 0x49, 0x41, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xf9, 0x02, 0x03, 0x19, 0x71, 0x46, 0x84, 0x13, 0x05, 0x14, 0x03, 0x12, 0x23, 0x09, 0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0x65, 0x03, 0x0c, 0x00, 0x10, 0x00, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 0x25, 0x00, 0x75, 0xf2, 0x31, 0x00, 0x00, 0x9e, 0x01, 0x1d, 0x80, 0xd0, 0x72, 0x1c, 0x16, 0x20, 0x10, 0x2c, 0x25, 0x80, 0x75, 0xf2, 0x31, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0x75, 0xf2, 0x31, 0x00, 0x00, 0x18, 0x8c, 0x0a, 0xd0, 0x90, 0x20, 0x40, 0x31, 0x20, 0x0c, 0x40, 0x55, 0x00, 0x75, 0xf2, 0x31, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xca, }; #ifdef DEBUG static char tegra_edid_dump_buff[16 * 1024]; static void tegra_edid_dump(struct tegra_edid *edid) { struct seq_file s; int i; char c; memset(&s, 0x0, sizeof(s)); s.buf = tegra_edid_dump_buff; s.size = sizeof(tegra_edid_dump_buff); s.private = edid; tegra_edid_show(&s, NULL); i = 0; while (i < s.count ) { if ((s.count - i) > 256) { c = s.buf[i + 256]; s.buf[i + 256] = 0; printk("%s", s.buf + i); s.buf[i + 256] = c; } else { printk("%s", s.buf + i); } i += 256; } } #else static void tegra_edid_dump(struct tegra_edid *edid) { } #endif int tegra_edid_i2c_adap_change_rate(struct i2c_adapter *i2c_adap, int rate) { const int MIN_RATE = 5000, MAX_RATE = 4000000; int err = 0, cur_rate = 0; if (rate < MIN_RATE || rate > MAX_RATE) { pr_warn("Cannot change the i2c_ddc rate, the rate:%d cannot" "be below minimum rate:%d or above maximum rate:%d", rate, MIN_RATE, MAX_RATE); return -1; } if (i2c_adap) { cur_rate = i2c_get_adapter_bus_clk_rate(i2c_adap); if (cur_rate == rate) return 0; err = i2c_set_adapter_bus_clk_rate(i2c_adap, rate); if (err) pr_warn("Could not change i2c_ddc sclk rate\n"); else pr_info("Switching i2c_ddc sclk rate: from %d, " "to %d\n", cur_rate, rate); } else { pr_warn("ddc i2c adapter NULL\n"); err = -1; } return err; } int tegra_edid_i2c_divide_rate(struct tegra_edid *edid) { struct i2c_adapter *i2c_adap = i2c_get_adapter(edid->dc->out->ddc_bus); int new_rate = 0, old_rate = 0, err = 0; if (i2c_adap) { old_rate = i2c_get_adapter_bus_clk_rate(i2c_adap); new_rate = old_rate >> 1; err = tegra_edid_i2c_adap_change_rate(i2c_adap, new_rate); } else err = -1; return err; } int tegra_edid_read_block(struct tegra_edid *edid, int block, u8 *data) { u8 block_buf[] = {block >> 1}; u8 cmd_buf[] = {(block % 0x2) * EDID_BYTES_PER_BLOCK}; u8 i; u8 last_checksum = 0; u8 checksum = 0; size_t attempt_cnt = 0; struct i2c_msg msg[] = { { .addr = 0x30, .flags = 0, .len = 1, .buf = block_buf, }, { .addr = 0x50, .flags = 0, .len = 1, .buf = cmd_buf, }, { .addr = 0x50, .flags = I2C_M_RD, .len = EDID_BYTES_PER_BLOCK, .buf = data, }}; struct i2c_msg *m; int msg_len; if (block > 1) { msg_len = 3; m = msg; } else { msg_len = 2; m = &msg[1]; } do { int status = edid->i2c_ops.i2c_transfer(edid->dc, m, msg_len); checksum = 0; if (status < 0) return status; if (status != msg_len) return -EIO; /* fix base block header if corrupted */ if (!block) { for (i = 0; i < EDID_BASE_HEADER_SIZE; i++) { if (data[i] != edid_base_header[i]) data[i] = edid_base_header[i]; } } for (i = 0; i < EDID_BYTES_PER_BLOCK; i++) checksum += data[i]; if (checksum != 0) { /* * It is completely possible that the sink that we are * reading has a bad EDID checksum (specifically, some * of the older TVs). These TVs have the modes, etc * programmed in their EDID correctly, but just have * a bad checksum. It then becomes hard to distinguish * between an i2c failure vs bad EDID. * To get around this, read the EDID multiple times. * If the calculated checksum is the exact same * multiple number of times, just print a * warning and ignore. */ if (attempt_cnt == 0) last_checksum = checksum; /* On different checksum remainder, lower i2c speed */ if (last_checksum != checksum) { pr_warn("%s: checksum failed and did not match consecutive reads. Previous remainder was %u. New remainder is %u. Failed at attempt %zu\n", __func__, last_checksum, checksum, attempt_cnt); if (tegra_edid_i2c_divide_rate(edid)) { pr_warn("Cannot halve i2c speed giving" "up on trying to change the i2c speed for EDID read\n"); return -EIO; } else { attempt_cnt = 0; continue; } } usleep_range(TEGRA_EDID_MIN_RETRY_DELAY_US, TEGRA_EDID_MAX_RETRY_DELAY_US); } } while (checksum != 0 && ++attempt_cnt < TEGRA_EDID_MAX_RETRY); /* * Re-calculate the checksum since the standard EDID parser doesn't * like the bad checksum */ if (checksum != 0) { checksum = 0; edid->errors |= EDID_ERRORS_CHECKSUM_CORRUPTED; for (i = 0; i < 127; i++) checksum += data[i]; checksum = (u8)(256 - checksum); data[127] = checksum; pr_warn("%s: remainder is %u for the last %d attempts. Assuming bad sink EDID and ignoring. New checksum is %u\n", __func__, last_checksum, TEGRA_EDID_MAX_RETRY, checksum); } return 0; } static int tegra_edid_parse_ext_block(const u8 *raw, int idx, struct tegra_edid_pvt *edid) { const u8 *ptr; u8 tmp; u8 code; int len; int i; bool basic_audio = false; if (!edid) { pr_err("%s: invalid argument\n", __func__); return -EINVAL; } ptr = &raw[0]; /* If CEA 861 block get info for eld struct */ if (ptr) { if (*ptr <= 3) edid->eld.eld_ver = 0x02; edid->eld.cea_edid_ver = ptr[1]; /* check for basic audio support in CEA 861 block */ if(raw[3] & (1<<6)) { /* For basic audio, set spk_alloc to Left+Right. * If there is a Speaker Alloc block this will * get over written with that value */ basic_audio = true; edid->support_audio = 1; } } if (raw[3] & 0x80) edid->support_underscan = 1; else edid->support_underscan = 0; if (raw[3] & (1<<5)) edid->support_yuv444 = 1; else edid->support_yuv444 = 0; if (raw[3] & (1<<4)) edid->support_yuv422 = 1; else edid->support_yuv422 = 0; ptr = &raw[4]; while (ptr < &raw[idx]) { tmp = *ptr; len = tmp & 0x1f; /* HDMI Specification v1.4a, section 8.3.2: * see Table 8-16 for HDMI VSDB format. * data blocks have tags in top 3 bits: * tag code 2: video data block * tag code 3: vendor specific data block */ code = (tmp >> 5) & 0x7; switch (code) { case CEA_DATA_BLOCK_AUDIO: { int sad_n = edid->eld.sad_count * 3; edid->eld.sad_count += len / 3; pr_debug("%s: incrementing eld.sad_count by %d to %d\n", __func__, len / 3, edid->eld.sad_count); edid->eld.conn_type = 0x00; edid->eld.support_hdcp = 0x00; for (i = 0; (i < len) && (sad_n < ELD_MAX_SAD_BYTES); i++, sad_n++) edid->eld.sad[sad_n] = ptr[i + 1]; len++; ptr += len; /* adding the header */ /* Got an audio data block so enable audio */ if (basic_audio == true) edid->eld.spk_alloc = 1; break; } /* case 2 is commented out for now */ case CEA_DATA_BLOCK_VENDOR: { int j = 0; u16 temp = 0; /* OUI for hdmi licensing, LLC */ if ((ptr[1] == 0x03) && (ptr[2] == 0x0c) && (ptr[3] == 0)) { edid->eld.port_id[0] = ptr[4]; edid->eld.port_id[1] = ptr[5]; temp = ptr[6]; edid->color_depth_flag = (temp << 5) & TEGRA_DC_RGB_MASK; if (edid->support_yuv422 && (temp & 0x08)) edid->color_depth_flag |= (temp >> 1) & TEGRA_DC_Y422_MASK; if (edid->support_yuv444 && (temp & 0x08)) edid->color_depth_flag |= (temp << 2) & TEGRA_DC_Y444_MASK; if (len >= 7) edid->max_tmds_char_rate_hllc_mhz = ptr[7] * 5; edid->max_tmds_char_rate_hllc_mhz = edid->max_tmds_char_rate_hllc_mhz ? : 165; /* for <=165MHz field may be 0 */ } /* OUI for hdmi forum */ if ((ptr[1] == 0xd8) && (ptr[2] == 0x5d) && (ptr[3] == 0xc4)) { edid->hfvsdb_present = true; edid->color_depth_flag |= ptr[7] & TEGRA_DC_Y420_MASK; edid->max_tmds_char_rate_hf_mhz = ptr[5] * 5; edid->scdc_present = (ptr[6] >> 7) & 0x1; } /* OUI for Nvidia */ if ((ptr[1] == 0x4b) && (ptr[2] == 0x04) && (ptr[3] == 0)) { /* version 1.0 vrr capabilities */ if (ptr[4] == 1) edid->min_vrr_fps = ptr[5]; } if ((len >= 8) && (ptr[1] == 0x03) && (ptr[2] == 0x0c) && (ptr[3] == 0)) { j = 8; tmp = ptr[j++]; /* HDMI_Video_present? */ if (tmp & 0x20) { /* Latency_Fields_present? */ if (tmp & 0x80) j += 2; /* I_Latency_Fields_present? */ if (tmp & 0x40) j += 2; /* 3D_present? */ if (j <= len && (ptr[j] & 0x80)) edid->support_stereo = 1; } } if ((len > 5) && (ptr[1] == 0x03) && (ptr[2] == 0x0c) && (ptr[3] == 0)) { edid->eld.support_ai = (ptr[6] & 0x80); } if ((len > 9) && (ptr[1] == 0x03) && (ptr[2] == 0x0c) && (ptr[3] == 0)) { edid->eld.aud_synch_delay = ptr[10]; } len++; ptr += len; /* adding the header */ break; } case CEA_DATA_BLOCK_SPEAKER_ALLOC: { edid->eld.spk_alloc = ptr[1]; len++; ptr += len; /* adding the header */ break; } case CEA_DATA_BLOCK_EXT: { u8 ext_db = ptr[1]; switch (ext_db) { case CEA_DATA_BLOCK_EXT_VCDB: edid->rgb_quant_selectable = ptr[2] & 0x40; edid->yuv_quant_selectable = ptr[2] & 0x80; break; case CEA_DATA_BLOCK_EXT_Y420VDB: /* fall through */ case CEA_DATA_BLOCK_EXT_Y420CMDB: edid->db420_present = true; break; case CEA_DATA_BLOCK_EXT_CDB: edid->colorimetry = ptr[2]; break; case CEA_DATA_BLOCK_EXT_HDR: edid->hdr_pckt_len = ptr[0] & 0x1f; edid->hdr_eotf_smpte2084 = ptr[2] & TEGRA_DC_EXT_CEA861_3_EOTF_SMPTE_2084; edid->hdr_eotf = ptr[2]; edid->hdr_static_metadata = ptr[3]; if (edid->hdr_pckt_len > 5) { edid->hdr_desired_max_luma = ptr[4]; edid->hdr_desired_max_frame_avg_luma = ptr[5]; edid->hdr_desired_min_luma = ptr[6]; } else if (edid->hdr_pckt_len > 4) { edid->hdr_desired_max_luma = ptr[4]; edid->hdr_desired_max_frame_avg_luma = ptr[5]; } else if (edid->hdr_pckt_len > 3) { edid->hdr_desired_max_luma = ptr[4]; } break; }; len++; ptr += len; break; } default: len++; /* len does not include header */ ptr += len; break; } } return 0; } static int tegra_edid_mode_support_stereo(struct fb_videomode *mode) { if (!mode) return 0; if (mode->xres == 1280 && mode->yres == 720 && ((mode->refresh == 60) || (mode->refresh == 50))) return 1; if (mode->xres == 1920 && mode->yres == 1080 && mode->refresh == 24) return 1; return 0; } static void data_release(struct kref *ref) { struct tegra_edid_pvt *data = container_of(ref, struct tegra_edid_pvt, refcnt); vfree(data); } u16 tegra_edid_get_cd_flag(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return -EFAULT; } return edid->data->color_depth_flag; } u16 tegra_edid_get_ex_hdr_cap(struct tegra_edid *edid) { u16 ret = 0; struct tegra_dc_out *default_out; if (!edid || !edid->data) { pr_warn("edid invalid\n"); return -EFAULT; } if (edid->dc && edid->dc->pdata && edid->dc->pdata->default_out) { default_out = edid->dc->pdata->default_out; if ((default_out->type == TEGRA_DC_OUT_HDMI) && (default_out->hdmi_out->generic_infoframe_type != HDMI_INFOFRAME_TYPE_HDR)) { pr_debug("hdmi generic infoframe is not for hdr\n"); return ret; } } if (edid->data->hdr_eotf_smpte2084) ret |= FB_CAP_SMPTE_2084; return ret; } int tegra_edid_get_ex_hdr_cap_info(struct tegra_edid *edid, struct tegra_dc_ext_hdr_caps *hdr_cap_info) { int ret = 0; struct tegra_dc_out *default_out; if (!edid || !edid->data) { pr_warn("edid invalid\n"); return -EFAULT; } if (edid->dc && edid->dc->pdata && edid->dc->pdata->default_out) { default_out = edid->dc->pdata->default_out; if ((default_out->type == TEGRA_DC_OUT_HDMI) && (default_out->hdmi_out->generic_infoframe_type != HDMI_INFOFRAME_TYPE_HDR)) { pr_debug("hdmi generic infoframe is not for hdr\n"); return ret; } } if (!edid->data->hdr_pckt_len) return ret; hdr_cap_info->nr_elements = edid->data->hdr_pckt_len; hdr_cap_info->eotf = edid->data->hdr_eotf; hdr_cap_info->static_metadata_type = edid->data->hdr_static_metadata; hdr_cap_info->desired_content_max_lum = edid->data->hdr_desired_max_luma; hdr_cap_info->desired_content_max_frame_avg_lum = edid->data->hdr_desired_max_frame_avg_luma; hdr_cap_info->desired_content_min_lum = edid->data->hdr_desired_min_luma; return ret; } inline bool tegra_edid_is_rgb_quantization_selectable(struct tegra_edid *edid) { if (!edid || !edid->data) { return false; } return edid->data->rgb_quant_selectable; } inline bool tegra_edid_is_yuv_quantization_selectable(struct tegra_edid *edid) { if (!edid || !edid->data) { return false; } return edid->data->yuv_quant_selectable; } int tegra_edid_get_ex_quant_cap_info(struct tegra_edid *edid, struct tegra_dc_ext_quant_caps *quant_cap_info) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return -EINVAL; } quant_cap_info->rgb_quant_selectable = edid->data->rgb_quant_selectable; quant_cap_info->yuv_quant_selectable = edid->data->yuv_quant_selectable; return 0; } /* hdmi spec mandates sink to specify correct max_tmds_clk only for >165MHz */ u16 tegra_edid_get_max_clk_rate(struct tegra_edid *edid) { u16 tmds_hf, tmds_llc; if (!edid || !edid->data) { pr_warn("edid invalid\n"); return -EFAULT; } tmds_hf = edid->data->max_tmds_char_rate_hf_mhz; tmds_llc = edid->data->max_tmds_char_rate_hllc_mhz; if (tmds_hf || tmds_llc) return tmds_hf ? : tmds_llc; return 0; } bool tegra_edid_is_scdc_present(struct tegra_edid *edid) { if (tegra_platform_is_vdk()) return false; if (!edid || !edid->data) { pr_warn("edid invalid\n"); return false; } if (edid->data->scdc_present && !tegra_edid_is_hfvsdb_present(edid)) { pr_warn("scdc presence incorrectly parsed\n"); dump_stack(); } return edid->data->scdc_present; } bool tegra_edid_is_hfvsdb_present(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return false; } return edid->data->hfvsdb_present; } bool tegra_edid_is_420db_present(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return false; } return edid->data->db420_present; } u32 tegra_edid_get_quirks(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return 0; } return edid->data->quirks; } u16 tegra_edid_get_ex_colorimetry(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return 0; } return edid->data->colorimetry; } bool tegra_edid_support_yuv422(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return 0; } return edid->data->support_yuv422; } bool tegra_edid_support_yuv444(struct tegra_edid *edid) { if (!edid || !edid->data) { pr_warn("edid invalid\n"); return 0; } return edid->data->support_yuv444; } int tegra_edid_get_monspecs(struct tegra_edid *edid, struct fb_monspecs *specs) { int i; int j; int ret; int extension_blocks; struct tegra_edid_pvt *new_data, *old_data; u8 checksum = 0; u8 *data; bool use_fallback = false; new_data = vzalloc(SZ_32K + sizeof(struct tegra_edid_pvt)); if (!new_data) return -ENOMEM; kref_init(&new_data->refcnt); if (edid->errors & EDID_ERRORS_READ_FAILED) use_fallback = true; edid->errors = 0; data = new_data->dc_edid.buf; if (edid->dc->vedid) { memcpy(data, edid->dc->vedid_data, EDID_BYTES_PER_BLOCK); /* checksum new edid */ for (i = 0; i < EDID_BYTES_PER_BLOCK; i++) checksum += data[i]; if (checksum != 0) { pr_err("%s: checksum failed\n", __func__); ret = -EINVAL; goto fail; } } else if (use_fallback) { memcpy(data, default_720p_edid, EDID_BYTES_PER_BLOCK); /* no checksum test needed */ } else { ret = tegra_edid_read_block(edid, 0, data); if (ret) goto fail; } memset(specs, 0x0, sizeof(struct fb_monspecs)); memset(&new_data->eld, 0x0, sizeof(new_data->eld)); fb_edid_to_monspecs(data, specs); if (specs->modedb == NULL) pr_info("%s: no modes in EDID base block\n", __func__); memcpy(new_data->eld.monitor_name, specs->monitor, sizeof(specs->monitor)); new_data->eld.mnl = strlen(new_data->eld.monitor_name) + 1; new_data->eld.product_id[0] = data[0x8]; new_data->eld.product_id[1] = data[0x9]; new_data->eld.manufacture_id[0] = data[0xA]; new_data->eld.manufacture_id[1] = data[0xB]; new_data->quirks = tegra_edid_lookup_quirks(specs->manufacturer, specs->model, specs->monitor); extension_blocks = data[0x7e]; /* verify only one extension block (to stay in bounds) */ if (use_fallback && extension_blocks != 1) { pr_err("%s: fallback edid parsing failed\n", __func__); ret = -EINVAL; goto fail; } for (i = 1; i <= extension_blocks; i++) { if (edid->dc->vedid) { memcpy(data + i * EDID_BYTES_PER_BLOCK, edid->dc->vedid_data + i * EDID_BYTES_PER_BLOCK, EDID_BYTES_PER_BLOCK); for (j = 0; j < EDID_BYTES_PER_BLOCK; j++) checksum += data[i * EDID_BYTES_PER_BLOCK + j]; if (checksum != 0) { pr_err("%s: checksum failed\n", __func__); ret = -EINVAL; goto fail; } } else if (use_fallback) { /* only one extension block, verified above */ memcpy(data + i * EDID_BYTES_PER_BLOCK, default_720p_edid + i * EDID_BYTES_PER_BLOCK, EDID_BYTES_PER_BLOCK); } else { ret = tegra_edid_read_block(edid, i, data + i * EDID_BYTES_PER_BLOCK); if (ret < 0) goto fail; } if (data[i * EDID_BYTES_PER_BLOCK] == 0x2) { fb_edid_add_monspecs( data + i * EDID_BYTES_PER_BLOCK, specs); tegra_edid_parse_ext_block( data + i * EDID_BYTES_PER_BLOCK, data[i * EDID_BYTES_PER_BLOCK + 2], new_data); if (new_data->support_stereo) { for (j = 0; j < specs->modedb_len; j++) { if (tegra_edid_mode_support_stereo( &specs->modedb[j])) specs->modedb[j].vmode |= FB_VMODE_STEREO_FRAME_PACK; } } } else if (data[i * EDID_BYTES_PER_BLOCK] == 0x70 && specs->modedb) { tegra_edid_disp_id_ext_block_parse( data + i * EDID_BYTES_PER_BLOCK, specs, new_data); } } if (specs->modedb == NULL) { pr_err("%s: EDID has no valid modes\n", __func__); ret = -EINVAL; goto fail; } /* T210 and T186 supports fractional divider and hence can support the * 1000 / 1001 modes. For now, only enable support for 24, 30 and 60 Hz modes. */ { const int max_modes = 50; struct fb_videomode *frac_modes, *m; int frac_n = 0; frac_modes = kzalloc(sizeof(struct fb_videomode) * max_modes, GFP_KERNEL); if (frac_modes) { for (j = 0; j < specs->modedb_len; ++j) { int rate = tegra_dc_calc_fb_refresh(&specs->modedb[j]); #if defined(CONFIG_FB_MODE_PIXCLOCK_HZ) u64 pixclock_hz = 0; u64 frac_pixclock_hz = 0; #endif /* * 1000/1001 modes are only supported on CEA * SVDs or on HDMI EXT * */ bool supported = ((specs->modedb[j].vmode & FB_VMODE_IS_CEA) && !(specs->modedb[j].vmode & FB_VMODE_IS_DETAILED)) || specs->modedb[j].vmode & FB_VMODE_IS_HDMI_EXT; if (supported && (rate == 24000 || rate == 30000 || (rate > (60000 - 20) && rate < (60000 + 20))) && frac_n < max_modes) { memcpy(&frac_modes[frac_n], &specs->modedb[j], sizeof(struct fb_videomode)); frac_modes[frac_n].pixclock = frac_modes[frac_n].pixclock * 1001 / 1000; frac_modes[frac_n].vmode |= FB_VMODE_1000DIV1001; #if defined(CONFIG_FB_MODE_PIXCLOCK_HZ) /* u64 to avoid overflow in pclk hz */ pixclock_hz = frac_modes[frac_n].pixclock_hz; frac_pixclock_hz = pixclock_hz * 1000 / 1001; frac_modes[frac_n].pixclock_hz = (u32)frac_pixclock_hz; #endif frac_n++; } } if (frac_n == max_modes) pr_warn("Hit fractional mode limit %d!\n", frac_n); m = kzalloc((specs->modedb_len + frac_n) * sizeof(struct fb_videomode), GFP_KERNEL); if (m) { memcpy(m, specs->modedb, specs->modedb_len * sizeof(struct fb_videomode)); memcpy(&m[specs->modedb_len], frac_modes, frac_n * sizeof(struct fb_videomode)); kfree(specs->modedb); specs->modedb = m; specs->modedb_len += frac_n; } kfree(frac_modes); } } for (j = 0; j < specs->modedb_len; j++) { if (!new_data->rgb_quant_selectable && !(specs->modedb[j].vmode & FB_VMODE_SET_YUV_MASK)) /* * Follow HDMI 2.0 specification (section 7.3) to * select color range. */ if (specs->modedb[j].vmode & FB_VMODE_IS_CEA && !(specs->modedb[j].xres == 640 && specs->modedb[j].yres == 480)) specs->modedb[j].vmode |= FB_VMODE_LIMITED_RANGE; /* TODO: add color range selection for YUV mode. */ if (!new_data->yuv_quant_selectable && (specs->modedb[j].vmode & FB_VMODE_SET_YUV_MASK)) specs->modedb[j].vmode |= FB_VMODE_LIMITED_RANGE; } if (use_fallback) edid->errors |= EDID_ERRORS_USING_FALLBACK; new_data->dc_edid.len = i * EDID_BYTES_PER_BLOCK; mutex_lock(&edid->lock); old_data = edid->data; edid->data = new_data; mutex_unlock(&edid->lock); if (old_data) kref_put(&old_data->refcnt, data_release); tegra_edid_dump(edid); return 0; fail: vfree(new_data); return ret; } int tegra_edid_audio_supported(struct tegra_edid *edid) { if ((!edid) || (!edid->data)) return 0; return edid->data->support_audio; } int tegra_edid_underscan_supported(struct tegra_edid *edid) { if ((!edid) || (!edid->data)) return 0; return edid->data->support_underscan; } int tegra_edid_get_eld(struct tegra_edid *edid, struct tegra_edid_hdmi_eld *elddata) { if (!elddata || !edid->data) return -EFAULT; memcpy(elddata,&edid->data->eld,sizeof(struct tegra_edid_hdmi_eld)); return 0; } int tegra_edid_get_source_physical_address(struct tegra_edid *edid, u8 *phy_address) { if ((!phy_address) || (!edid) || (!edid->data)) return -EFAULT; phy_address[0] = edid->data->eld.port_id[0]; phy_address[1] = edid->data->eld.port_id[1]; return 0; } struct tegra_edid *tegra_edid_create(struct tegra_dc *dc, i2c_transfer_func_t i2c_func) { struct tegra_edid *edid; edid = kzalloc(sizeof(struct tegra_edid), GFP_KERNEL); if (!edid) return ERR_PTR(-ENOMEM); mutex_init(&edid->lock); edid->i2c_ops.i2c_transfer = i2c_func; edid->dc = dc; return edid; } void tegra_edid_destroy(struct tegra_edid *edid) { if (edid->data) kref_put(&edid->data->refcnt, data_release); kfree(edid); } struct tegra_dc_edid *tegra_edid_get_data(struct tegra_edid *edid) { struct tegra_edid_pvt *data; mutex_lock(&edid->lock); data = edid->data; if (data) kref_get(&data->refcnt); mutex_unlock(&edid->lock); return data ? &data->dc_edid : NULL; } void tegra_edid_put_data(struct tegra_dc_edid *data) { struct tegra_edid_pvt *pvt; if (!data) return; pvt = container_of(data, struct tegra_edid_pvt, dc_edid); kref_put(&pvt->refcnt, data_release); } int tegra_dc_edid_blob(struct tegra_dc *dc, struct i2c_msg *msgs, int num) { struct i2c_msg *pmsg; int i; int status = 0; u32 len = 0; struct device_node *np_panel = NULL; np_panel = tegra_dc_get_panel_np(dc); if (!np_panel || !of_device_is_available(np_panel)) return -ENOENT; for (i = 0; i < num; ++i) { pmsg = &msgs[i]; if (pmsg->flags & I2C_M_RD) { /* Read */ len = pmsg->len; status = of_property_read_u8_array(np_panel, "nvidia,edid", pmsg->buf, len); if (status) { dev_err(&dc->ndev->dev, "Failed to read EDID blob from DT" " addr:%d, size:%d\n", pmsg->addr, len); return status; } } } return i; } struct tegra_dc_edid *tegra_dc_get_edid(struct tegra_dc *dc) { if (!dc || !dc->edid) return ERR_PTR(-ENODEV); return tegra_edid_get_data(dc->edid); } EXPORT_SYMBOL(tegra_dc_get_edid); void tegra_dc_put_edid(struct tegra_dc_edid *edid) { tegra_edid_put_data(edid); } EXPORT_SYMBOL(tegra_dc_put_edid); static const struct i2c_device_id tegra_edid_id[] = { { "tegra_edid", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, tegra_edid_id); static struct i2c_driver tegra_edid_driver = { .id_table = tegra_edid_id, .driver = { .name = "tegra_edid", }, }; static int __init tegra_edid_init(void) { return i2c_add_driver(&tegra_edid_driver); } static void __exit tegra_edid_exit(void) { i2c_del_driver(&tegra_edid_driver); } module_init(tegra_edid_init); module_exit(tegra_edid_exit);