// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2021, ASPEED Technology Inc. // Authors: KuoHsiang Chou #include #include #include #include #include #include #include #include "ast_drv.h" static bool ast_astdp_is_connected(struct ast_device *ast) { if (!ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xDF, AST_IO_VGACRDF_HPD)) return false; return true; } static int ast_astdp_read_edid_block(void *data, u8 *buf, unsigned int block, size_t len) { struct ast_device *ast = data; size_t rdlen = round_up(len, 4); int ret = 0; unsigned int i; if (block > 0) return -EIO; /* extension headers not supported */ /* * Protect access to I/O registers from concurrent modesetting * by acquiring the I/O-register lock. */ mutex_lock(&ast->modeset_lock); /* Start reading EDID data */ ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xe5, (u8)~AST_IO_VGACRE5_EDID_READ_DONE, 0x00); for (i = 0; i < rdlen; i += 4) { unsigned int offset; unsigned int j; u8 ediddata[4]; u8 vgacre4; offset = (i + block * EDID_LENGTH) / 4; if (offset >= 64) { ret = -EIO; goto out; } vgacre4 = offset; /* * CRE4[7:0]: Read-Pointer for EDID (Unit: 4bytes); valid range: 0~64 */ ast_set_index_reg(ast, AST_IO_VGACRI, 0xe4, vgacre4); /* * CRD7[b0]: valid flag for EDID * CRD6[b0]: mirror read pointer for EDID */ for (j = 0; j < 200; ++j) { u8 vgacrd7, vgacrd6; /* * Delay are getting longer with each retry. * * 1. No delay on first try * 2. The Delays are often 2 loops when users request "Display Settings" * of right-click of mouse. * 3. The Delays are often longer a lot when system resume from S3/S4. */ if (j) mdelay(j + 1); /* Wait for EDID offset to show up in mirror register */ vgacrd7 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd7); if (vgacrd7 & AST_IO_VGACRD7_EDID_VALID_FLAG) { vgacrd6 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd6); if (vgacrd6 == offset) break; } } if (j == 200) { ret = -EBUSY; goto out; } ediddata[0] = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd8); ediddata[1] = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd9); ediddata[2] = ast_get_index_reg(ast, AST_IO_VGACRI, 0xda); ediddata[3] = ast_get_index_reg(ast, AST_IO_VGACRI, 0xdb); if (i == 31) { /* * For 128-bytes EDID_1.3, * 1. Add the value of Bytes-126 to Bytes-127. * The Bytes-127 is Checksum. Sum of all 128bytes should * equal 0 (mod 256). * 2. Modify Bytes-126 to be 0. * The Bytes-126 indicates the Number of extensions to * follow. 0 represents noextensions. */ ediddata[3] = ediddata[3] + ediddata[2]; ediddata[2] = 0; } memcpy(buf, ediddata, min((len - i), 4)); buf += 4; } out: /* Signal end of reading */ ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xe5, (u8)~AST_IO_VGACRE5_EDID_READ_DONE, AST_IO_VGACRE5_EDID_READ_DONE); mutex_unlock(&ast->modeset_lock); return ret; } /* * Launch Aspeed DP */ int ast_dp_launch(struct ast_device *ast) { struct drm_device *dev = &ast->base; unsigned int i = 10; while (i) { u8 vgacrd1 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd1); if (vgacrd1 & AST_IO_VGACRD1_MCU_FW_EXECUTING) break; --i; msleep(100); } if (!i) { drm_err(dev, "Wait DPMCU executing timeout\n"); return -ENODEV; } ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xe5, (u8) ~AST_IO_VGACRE5_EDID_READ_DONE, AST_IO_VGACRE5_EDID_READ_DONE); return 0; } static bool ast_dp_power_is_on(struct ast_device *ast) { u8 vgacre3; vgacre3 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xe3); return !(vgacre3 & AST_DP_PHY_SLEEP); } static void ast_dp_power_on_off(struct drm_device *dev, bool on) { struct ast_device *ast = to_ast_device(dev); // Read and Turn off DP PHY sleep u8 bE3 = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xE3, AST_DP_VIDEO_ENABLE); // Turn on DP PHY sleep if (!on) bE3 |= AST_DP_PHY_SLEEP; // DP Power on/off ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xE3, (u8) ~AST_DP_PHY_SLEEP, bE3); msleep(50); } static void ast_dp_link_training(struct ast_device *ast) { struct drm_device *dev = &ast->base; int i; for (i = 0; i < 10; i++) { u8 vgacrdc; if (i) msleep(100); vgacrdc = ast_get_index_reg(ast, AST_IO_VGACRI, 0xdc); if (vgacrdc & AST_IO_VGACRDC_LINK_SUCCESS) return; } drm_err(dev, "Link training failed\n"); } static void ast_dp_set_on_off(struct drm_device *dev, bool on) { struct ast_device *ast = to_ast_device(dev); u8 video_on_off = on; u32 i = 0; // Video On/Off ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xE3, (u8) ~AST_DP_VIDEO_ENABLE, on); video_on_off <<= 4; while (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xDF, ASTDP_MIRROR_VIDEO_ENABLE) != video_on_off) { // wait 1 ms mdelay(1); if (++i > 200) break; } } static void ast_dp_set_mode(struct drm_crtc *crtc, struct ast_vbios_mode_info *vbios_mode) { struct ast_device *ast = to_ast_device(crtc->dev); u32 ulRefreshRateIndex; u8 ModeIdx; ulRefreshRateIndex = vbios_mode->enh_table->refresh_rate_index - 1; switch (crtc->mode.crtc_hdisplay) { case 320: ModeIdx = ASTDP_320x240_60; break; case 400: ModeIdx = ASTDP_400x300_60; break; case 512: ModeIdx = ASTDP_512x384_60; break; case 640: ModeIdx = (ASTDP_640x480_60 + (u8) ulRefreshRateIndex); break; case 800: ModeIdx = (ASTDP_800x600_56 + (u8) ulRefreshRateIndex); break; case 1024: ModeIdx = (ASTDP_1024x768_60 + (u8) ulRefreshRateIndex); break; case 1152: ModeIdx = ASTDP_1152x864_75; break; case 1280: if (crtc->mode.crtc_vdisplay == 800) ModeIdx = (ASTDP_1280x800_60_RB - (u8) ulRefreshRateIndex); else // 1024 ModeIdx = (ASTDP_1280x1024_60 + (u8) ulRefreshRateIndex); break; case 1360: case 1366: ModeIdx = ASTDP_1366x768_60; break; case 1440: ModeIdx = (ASTDP_1440x900_60_RB - (u8) ulRefreshRateIndex); break; case 1600: if (crtc->mode.crtc_vdisplay == 900) ModeIdx = (ASTDP_1600x900_60_RB - (u8) ulRefreshRateIndex); else //1200 ModeIdx = ASTDP_1600x1200_60; break; case 1680: ModeIdx = (ASTDP_1680x1050_60_RB - (u8) ulRefreshRateIndex); break; case 1920: if (crtc->mode.crtc_vdisplay == 1080) ModeIdx = ASTDP_1920x1080_60; else //1200 ModeIdx = ASTDP_1920x1200_60; break; default: return; } /* * CRE0[7:0]: MISC0 ((0x00: 18-bpp) or (0x20: 24-bpp) * CRE1[7:0]: MISC1 (default: 0x00) * CRE2[7:0]: video format index (0x00 ~ 0x20 or 0x40 ~ 0x50) */ ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xE0, ASTDP_AND_CLEAR_MASK, ASTDP_MISC0_24bpp); ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xE1, ASTDP_AND_CLEAR_MASK, ASTDP_MISC1); ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xE2, ASTDP_AND_CLEAR_MASK, ModeIdx); } static void ast_wait_for_vretrace(struct ast_device *ast) { unsigned long timeout = jiffies + HZ; u8 vgair1; do { vgair1 = ast_io_read8(ast, AST_IO_VGAIR1_R); } while (!(vgair1 & AST_IO_VGAIR1_VREFRESH) && time_before(jiffies, timeout)); } /* * Encoder */ static const struct drm_encoder_funcs ast_astdp_encoder_funcs = { .destroy = drm_encoder_cleanup, }; static void ast_astdp_encoder_helper_atomic_mode_set(struct drm_encoder *encoder, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { struct drm_crtc *crtc = crtc_state->crtc; struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state); struct ast_vbios_mode_info *vbios_mode_info = &ast_crtc_state->vbios_mode_info; ast_dp_set_mode(crtc, vbios_mode_info); } static void ast_astdp_encoder_helper_atomic_enable(struct drm_encoder *encoder, struct drm_atomic_state *state) { struct drm_device *dev = encoder->dev; struct ast_device *ast = to_ast_device(dev); struct ast_connector *ast_connector = &ast->output.astdp.connector; if (ast_connector->physical_status == connector_status_connected) { ast_dp_power_on_off(dev, AST_DP_POWER_ON); ast_dp_link_training(ast); ast_wait_for_vretrace(ast); ast_dp_set_on_off(dev, 1); } } static void ast_astdp_encoder_helper_atomic_disable(struct drm_encoder *encoder, struct drm_atomic_state *state) { struct drm_device *dev = encoder->dev; ast_dp_set_on_off(dev, 0); ast_dp_power_on_off(dev, AST_DP_POWER_OFF); } static const struct drm_encoder_helper_funcs ast_astdp_encoder_helper_funcs = { .atomic_mode_set = ast_astdp_encoder_helper_atomic_mode_set, .atomic_enable = ast_astdp_encoder_helper_atomic_enable, .atomic_disable = ast_astdp_encoder_helper_atomic_disable, }; /* * Connector */ static int ast_astdp_connector_helper_get_modes(struct drm_connector *connector) { struct ast_connector *ast_connector = to_ast_connector(connector); int count; if (ast_connector->physical_status == connector_status_connected) { struct ast_device *ast = to_ast_device(connector->dev); const struct drm_edid *drm_edid; drm_edid = drm_edid_read_custom(connector, ast_astdp_read_edid_block, ast); drm_edid_connector_update(connector, drm_edid); count = drm_edid_connector_add_modes(connector); drm_edid_free(drm_edid); } else { drm_edid_connector_update(connector, NULL); /* * There's no EDID data without a connected monitor. Set BMC- * compatible modes in this case. The XGA default resolution * should work well for all BMCs. */ count = drm_add_modes_noedid(connector, 4096, 4096); if (count) drm_set_preferred_mode(connector, 1024, 768); } return count; } static int ast_astdp_connector_helper_detect_ctx(struct drm_connector *connector, struct drm_modeset_acquire_ctx *ctx, bool force) { struct ast_connector *ast_connector = to_ast_connector(connector); struct drm_device *dev = connector->dev; struct ast_device *ast = to_ast_device(connector->dev); enum drm_connector_status status = connector_status_disconnected; bool power_is_on; mutex_lock(&ast->modeset_lock); power_is_on = ast_dp_power_is_on(ast); if (!power_is_on) ast_dp_power_on_off(dev, true); if (ast_astdp_is_connected(ast)) status = connector_status_connected; if (!power_is_on && status == connector_status_disconnected) ast_dp_power_on_off(dev, false); mutex_unlock(&ast->modeset_lock); if (status != ast_connector->physical_status) ++connector->epoch_counter; ast_connector->physical_status = status; return connector_status_connected; } static const struct drm_connector_helper_funcs ast_astdp_connector_helper_funcs = { .get_modes = ast_astdp_connector_helper_get_modes, .detect_ctx = ast_astdp_connector_helper_detect_ctx, }; static const struct drm_connector_funcs ast_astdp_connector_funcs = { .reset = drm_atomic_helper_connector_reset, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static int ast_astdp_connector_init(struct drm_device *dev, struct drm_connector *connector) { int ret; ret = drm_connector_init(dev, connector, &ast_astdp_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); if (ret) return ret; drm_connector_helper_add(connector, &ast_astdp_connector_helper_funcs); connector->interlace_allowed = 0; connector->doublescan_allowed = 0; connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; return 0; } int ast_astdp_output_init(struct ast_device *ast) { struct drm_device *dev = &ast->base; struct drm_crtc *crtc = &ast->crtc; struct drm_encoder *encoder = &ast->output.astdp.encoder; struct ast_connector *ast_connector = &ast->output.astdp.connector; struct drm_connector *connector = &ast_connector->base; int ret; ret = drm_encoder_init(dev, encoder, &ast_astdp_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL); if (ret) return ret; drm_encoder_helper_add(encoder, &ast_astdp_encoder_helper_funcs); encoder->possible_crtcs = drm_crtc_mask(crtc); ret = ast_astdp_connector_init(dev, connector); if (ret) return ret; ast_connector->physical_status = connector->status; ret = drm_connector_attach_encoder(connector, encoder); if (ret) return ret; return 0; }