diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/analogix/anx7625.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/anx7625.c | 440 |
1 files changed, 421 insertions, 19 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 2346dbcc505f..76662fce4ce6 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -24,8 +24,9 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_crtc_helper.h> -#include <drm/drm_dp_helper.h> +#include <drm/dp/drm_dp_helper.h> #include <drm/drm_edid.h> +#include <drm/drm_hdcp.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> @@ -213,6 +214,65 @@ static int wait_aux_op_finish(struct anx7625_data *ctx) return 0; } +static int anx7625_aux_dpcd_read(struct anx7625_data *ctx, + u32 address, u8 len, u8 *buf) +{ + struct device *dev = &ctx->client->dev; + int ret; + u8 addrh, addrm, addrl; + u8 cmd; + + if (len > MAX_DPCD_BUFFER_SIZE) { + dev_err(dev, "exceed aux buffer len.\n"); + return -EINVAL; + } + + addrl = address & 0xFF; + addrm = (address >> 8) & 0xFF; + addrh = (address >> 16) & 0xFF; + + cmd = DPCD_CMD(len, DPCD_READ); + cmd = ((len - 1) << 4) | 0x09; + + /* Set command and length */ + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_COMMAND, cmd); + + /* Set aux access address */ + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_7_0, addrl); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_15_8, addrm); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_19_16, addrh); + + /* Enable aux access */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); + + if (ret < 0) { + dev_err(dev, "cannot access aux related register.\n"); + return -EIO; + } + + usleep_range(2000, 2100); + + ret = wait_aux_op_finish(ctx); + if (ret) { + dev_err(dev, "aux IO error: wait aux op finish.\n"); + return ret; + } + + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, + AP_AUX_BUFF_START, len, buf); + if (ret < 0) { + dev_err(dev, "read dpcd register failed\n"); + return -EIO; + } + + return 0; +} + static int anx7625_video_mute_control(struct anx7625_data *ctx, u8 status) { @@ -669,6 +729,165 @@ static int anx7625_dpi_config(struct anx7625_data *ctx) return ret; } +static int anx7625_read_flash_status(struct anx7625_data *ctx) +{ + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, R_RAM_CTRL); +} + +static int anx7625_hdcp_key_probe(struct anx7625_data *ctx) +{ + int ret, val; + struct device *dev = &ctx->client->dev; + u8 ident[FLASH_BUF_LEN]; + + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + FLASH_ADDR_HIGH, 0x91); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + FLASH_ADDR_LOW, 0xA0); + if (ret < 0) { + dev_err(dev, "IO error : set key flash address.\n"); + return ret; + } + + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + FLASH_LEN_HIGH, (FLASH_BUF_LEN - 1) >> 8); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + FLASH_LEN_LOW, (FLASH_BUF_LEN - 1) & 0xFF); + if (ret < 0) { + dev_err(dev, "IO error : set key flash len.\n"); + return ret; + } + + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_FLASH_RW_CTRL, FLASH_READ); + ret |= readx_poll_timeout(anx7625_read_flash_status, + ctx, val, + ((val & FLASH_DONE) || (val < 0)), + 2000, + 2000 * 150); + if (ret) { + dev_err(dev, "flash read access fail!\n"); + return -EIO; + } + + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, + FLASH_BUF_BASE_ADDR, + FLASH_BUF_LEN, ident); + if (ret < 0) { + dev_err(dev, "read flash data fail!\n"); + return -EIO; + } + + if (ident[29] == 0xFF && ident[30] == 0xFF && ident[31] == 0xFF) + return -EINVAL; + + return 0; +} + +static int anx7625_hdcp_key_load(struct anx7625_data *ctx) +{ + int ret; + struct device *dev = &ctx->client->dev; + + /* Select HDCP 1.4 KEY */ + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_BOOT_RETRY, 0x12); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + FLASH_ADDR_HIGH, HDCP14KEY_START_ADDR >> 8); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + FLASH_ADDR_LOW, HDCP14KEY_START_ADDR & 0xFF); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_RAM_LEN_H, HDCP14KEY_SIZE >> 12); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_RAM_LEN_L, HDCP14KEY_SIZE >> 4); + + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_RAM_ADDR_H, 0); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_RAM_ADDR_L, 0); + /* Enable HDCP 1.4 KEY load */ + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + R_RAM_CTRL, DECRYPT_EN | LOAD_START); + dev_dbg(dev, "load HDCP 1.4 key done\n"); + return ret; +} + +static int anx7625_hdcp_disable(struct anx7625_data *ctx) +{ + int ret; + struct device *dev = &ctx->client->dev; + + dev_dbg(dev, "disable HDCP 1.4\n"); + + /* Disable HDCP */ + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f); + /* Try auth flag */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10); + /* Interrupt for DRM */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01); + if (ret < 0) + dev_err(dev, "fail to disable HDCP\n"); + + return anx7625_write_and(ctx, ctx->i2c.tx_p0_client, + TX_HDCP_CTRL0, ~HARD_AUTH_EN & 0xFF); +} + +static int anx7625_hdcp_enable(struct anx7625_data *ctx) +{ + u8 bcap; + int ret; + struct device *dev = &ctx->client->dev; + + ret = anx7625_hdcp_key_probe(ctx); + if (ret) { + dev_dbg(dev, "no key found, not to do hdcp\n"); + return ret; + } + + /* Read downstream capability */ + anx7625_aux_dpcd_read(ctx, 0x68028, 1, &bcap); + if (!(bcap & 0x01)) { + pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap); + return 0; + } + + dev_dbg(dev, "enable HDCP 1.4\n"); + + /* First clear HDCP state */ + ret = anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, + TX_HDCP_CTRL0, + KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN); + usleep_range(1000, 1100); + /* Second clear HDCP state */ + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, + TX_HDCP_CTRL0, + KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN); + + /* Set time for waiting KSVR */ + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, + SP_TX_WAIT_KSVR_TIME, 0xc8); + /* Set time for waiting R0 */ + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, + SP_TX_WAIT_R0_TIME, 0xb0); + ret |= anx7625_hdcp_key_load(ctx); + if (ret) { + pr_warn("prepare HDCP key failed.\n"); + return ret; + } + + ret = anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xee, 0x20); + + /* Try auth flag */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10); + /* Interrupt for DRM */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01); + if (ret < 0) + dev_err(dev, "fail to enable HDCP\n"); + + return anx7625_write_or(ctx, ctx->i2c.tx_p0_client, + TX_HDCP_CTRL0, HARD_AUTH_EN); +} + static void anx7625_dp_start(struct anx7625_data *ctx) { int ret; @@ -679,6 +898,9 @@ static void anx7625_dp_start(struct anx7625_data *ctx) return; } + /* Disable HDCP */ + anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f); + if (ctx->pdata.is_dpi) ret = anx7625_dpi_config(ctx); else @@ -686,6 +908,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx) if (ret < 0) DRM_DEV_ERROR(dev, "MIPI phy setup error.\n"); + + ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED; + + ctx->dp_en = 1; } static void anx7625_dp_stop(struct anx7625_data *ctx) @@ -705,6 +931,10 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) ret |= anx7625_video_mute_control(ctx, 1); if (ret < 0) DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); + + ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED; + + ctx->dp_en = 0; } static int sp_tx_rst_aux(struct anx7625_data *ctx) @@ -1098,9 +1328,18 @@ static void anx7625_init_gpio(struct anx7625_data *platform) /* Gpio for chip power enable */ platform->pdata.gpio_p_on = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); + if (IS_ERR_OR_NULL(platform->pdata.gpio_p_on)) { + DRM_DEV_DEBUG_DRIVER(dev, "no enable gpio found\n"); + platform->pdata.gpio_p_on = NULL; + } + /* Gpio for chip reset */ platform->pdata.gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR_OR_NULL(platform->pdata.gpio_reset)) { + DRM_DEV_DEBUG_DRIVER(dev, "no reset gpio found\n"); + platform->pdata.gpio_reset = NULL; + } if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) { platform->pdata.low_power_mode = 1; @@ -1601,9 +1840,27 @@ static int anx7625_audio_hook_plugged_cb(struct device *dev, void *data, return 0; } +static int anx7625_audio_get_eld(struct device *dev, void *data, + u8 *buf, size_t len) +{ + struct anx7625_data *ctx = dev_get_drvdata(dev); + + if (!ctx->connector) { + dev_err(dev, "connector not initial\n"); + return -EINVAL; + } + + dev_dbg(dev, "audio copy eld\n"); + memcpy(buf, ctx->connector->eld, + min(sizeof(ctx->connector->eld), len)); + + return 0; +} + static const struct hdmi_codec_ops anx7625_codec_ops = { .hw_params = anx7625_audio_hw_params, .audio_shutdown = anx7625_audio_shutdown, + .get_eld = anx7625_audio_get_eld, .get_dai_id = anx7625_hdmi_i2s_get_dai_id, .hook_plugged_cb = anx7625_audio_hook_plugged_cb, }; @@ -1660,7 +1917,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx) host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node); if (!host) { DRM_DEV_ERROR(dev, "fail to find dsi host.\n"); - return -EINVAL; + return -EPROBE_DEFER; } dsi = devm_mipi_dsi_device_register_full(dev, host, &info); @@ -1688,6 +1945,83 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx) return 0; } +static void hdcp_check_work_func(struct work_struct *work) +{ + u8 status; + struct delayed_work *dwork; + struct anx7625_data *ctx; + struct device *dev; + struct drm_device *drm_dev; + + dwork = to_delayed_work(work); + ctx = container_of(dwork, struct anx7625_data, hdcp_work); + dev = &ctx->client->dev; + + if (!ctx->connector) { + dev_err(dev, "HDCP connector is null!"); + return; + } + + drm_dev = ctx->connector->dev; + drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL); + mutex_lock(&ctx->hdcp_wq_lock); + + status = anx7625_reg_read(ctx, ctx->i2c.tx_p0_client, 0); + dev_dbg(dev, "sink HDCP status check: %.02x\n", status); + if (status & BIT(1)) { + ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_ENABLED; + drm_hdcp_update_content_protection(ctx->connector, + ctx->hdcp_cp); + dev_dbg(dev, "update CP to ENABLE\n"); + } + + mutex_unlock(&ctx->hdcp_wq_lock); + drm_modeset_unlock(&drm_dev->mode_config.connection_mutex); +} + +static int anx7625_connector_atomic_check(struct anx7625_data *ctx, + struct drm_connector_state *state) +{ + struct device *dev = &ctx->client->dev; + int cp; + + dev_dbg(dev, "hdcp state check\n"); + cp = state->content_protection; + + if (cp == ctx->hdcp_cp) + return 0; + + if (cp == DRM_MODE_CONTENT_PROTECTION_DESIRED) { + if (ctx->dp_en) { + dev_dbg(dev, "enable HDCP\n"); + anx7625_hdcp_enable(ctx); + + queue_delayed_work(ctx->hdcp_workqueue, + &ctx->hdcp_work, + msecs_to_jiffies(2000)); + } + } + + if (cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { + if (ctx->hdcp_cp != DRM_MODE_CONTENT_PROTECTION_ENABLED) { + dev_err(dev, "current CP is not ENABLED\n"); + return -EINVAL; + } + anx7625_hdcp_disable(ctx); + ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED; + drm_hdcp_update_content_protection(ctx->connector, + ctx->hdcp_cp); + dev_dbg(dev, "update CP to UNDESIRE\n"); + } + + if (cp == DRM_MODE_CONTENT_PROTECTION_ENABLED) { + dev_err(dev, "Userspace illegal set to PROTECTION ENABLE\n"); + return -EINVAL; + } + + return 0; +} + static int anx7625_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { @@ -1902,25 +2236,57 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge, return true; } -static void anx7625_bridge_enable(struct drm_bridge *bridge) +static int anx7625_bridge_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct anx7625_data *ctx = bridge_to_anx7625(bridge); + struct device *dev = &ctx->client->dev; + + dev_dbg(dev, "drm bridge atomic check\n"); + + anx7625_bridge_mode_fixup(bridge, &crtc_state->mode, + &crtc_state->adjusted_mode); + + return anx7625_connector_atomic_check(ctx, conn_state); +} + +static void anx7625_bridge_atomic_enable(struct drm_bridge *bridge, + struct drm_bridge_state *state) { struct anx7625_data *ctx = bridge_to_anx7625(bridge); struct device *dev = &ctx->client->dev; + struct drm_connector *connector; - DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n"); + dev_dbg(dev, "drm atomic enable\n"); + + if (!bridge->encoder) { + dev_err(dev, "Parent encoder object not found"); + return; + } + + connector = drm_atomic_get_new_connector_for_encoder(state->base.state, + bridge->encoder); + if (!connector) + return; + + ctx->connector = connector; pm_runtime_get_sync(dev); anx7625_dp_start(ctx); } -static void anx7625_bridge_disable(struct drm_bridge *bridge) +static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old) { struct anx7625_data *ctx = bridge_to_anx7625(bridge); struct device *dev = &ctx->client->dev; - DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n"); + dev_dbg(dev, "drm atomic disable\n"); + ctx->connector = NULL; anx7625_dp_stop(ctx); pm_runtime_put_sync(dev); @@ -1950,11 +2316,14 @@ static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge, static const struct drm_bridge_funcs anx7625_bridge_funcs = { .attach = anx7625_bridge_attach, - .disable = anx7625_bridge_disable, .mode_valid = anx7625_bridge_mode_valid, .mode_set = anx7625_bridge_mode_set, - .mode_fixup = anx7625_bridge_mode_fixup, - .enable = anx7625_bridge_enable, + .atomic_check = anx7625_bridge_atomic_check, + .atomic_enable = anx7625_bridge_atomic_enable, + .atomic_disable = anx7625_bridge_atomic_disable, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, .detect = anx7625_bridge_detect, .get_edid = anx7625_bridge_get_edid, }; @@ -1962,40 +2331,54 @@ static const struct drm_bridge_funcs anx7625_bridge_funcs = { static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx, struct i2c_client *client) { + int err = 0; + ctx->i2c.tx_p0_client = i2c_new_dummy_device(client->adapter, TX_P0_ADDR >> 1); - if (!ctx->i2c.tx_p0_client) - return -ENOMEM; + if (IS_ERR(ctx->i2c.tx_p0_client)) + return PTR_ERR(ctx->i2c.tx_p0_client); ctx->i2c.tx_p1_client = i2c_new_dummy_device(client->adapter, TX_P1_ADDR >> 1); - if (!ctx->i2c.tx_p1_client) + if (IS_ERR(ctx->i2c.tx_p1_client)) { + err = PTR_ERR(ctx->i2c.tx_p1_client); goto free_tx_p0; + } ctx->i2c.tx_p2_client = i2c_new_dummy_device(client->adapter, TX_P2_ADDR >> 1); - if (!ctx->i2c.tx_p2_client) + if (IS_ERR(ctx->i2c.tx_p2_client)) { + err = PTR_ERR(ctx->i2c.tx_p2_client); goto free_tx_p1; + } ctx->i2c.rx_p0_client = i2c_new_dummy_device(client->adapter, RX_P0_ADDR >> 1); - if (!ctx->i2c.rx_p0_client) + if (IS_ERR(ctx->i2c.rx_p0_client)) { + err = PTR_ERR(ctx->i2c.rx_p0_client); goto free_tx_p2; + } ctx->i2c.rx_p1_client = i2c_new_dummy_device(client->adapter, RX_P1_ADDR >> 1); - if (!ctx->i2c.rx_p1_client) + if (IS_ERR(ctx->i2c.rx_p1_client)) { + err = PTR_ERR(ctx->i2c.rx_p1_client); goto free_rx_p0; + } ctx->i2c.rx_p2_client = i2c_new_dummy_device(client->adapter, RX_P2_ADDR >> 1); - if (!ctx->i2c.rx_p2_client) + if (IS_ERR(ctx->i2c.rx_p2_client)) { + err = PTR_ERR(ctx->i2c.rx_p2_client); goto free_rx_p1; + } ctx->i2c.tcpc_client = i2c_new_dummy_device(client->adapter, TCPC_INTERFACE_ADDR >> 1); - if (!ctx->i2c.tcpc_client) + if (IS_ERR(ctx->i2c.tcpc_client)) { + err = PTR_ERR(ctx->i2c.tcpc_client); goto free_rx_p2; + } return 0; @@ -2012,7 +2395,7 @@ free_tx_p1: free_tx_p0: i2c_unregister_device(ctx->i2c.tx_p0_client); - return -ENOMEM; + return err; } static void anx7625_unregister_i2c_dummy_clients(struct anx7625_data *ctx) @@ -2134,6 +2517,15 @@ static int anx7625_i2c_probe(struct i2c_client *client, anx7625_init_gpio(platform); mutex_init(&platform->lock); + mutex_init(&platform->hdcp_wq_lock); + + INIT_DELAYED_WORK(&platform->hdcp_work, hdcp_check_work_func); + platform->hdcp_workqueue = create_workqueue("hdcp workqueue"); + if (!platform->hdcp_workqueue) { + dev_err(dev, "fail to create work queue\n"); + ret = -ENOMEM; + goto free_platform; + } platform->pdata.intp_irq = client->irq; if (platform->pdata.intp_irq) { @@ -2143,7 +2535,7 @@ static int anx7625_i2c_probe(struct i2c_client *client, if (!platform->workqueue) { DRM_DEV_ERROR(dev, "fail to create work queue\n"); ret = -ENOMEM; - goto free_platform; + goto free_hdcp_wq; } ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq, @@ -2213,6 +2605,10 @@ free_wq: if (platform->workqueue) destroy_workqueue(platform->workqueue); +free_hdcp_wq: + if (platform->hdcp_workqueue) + destroy_workqueue(platform->hdcp_workqueue); + free_platform: kfree(platform); @@ -2228,6 +2624,12 @@ static int anx7625_i2c_remove(struct i2c_client *client) if (platform->pdata.intp_irq) destroy_workqueue(platform->workqueue); + if (platform->hdcp_workqueue) { + cancel_delayed_work(&platform->hdcp_work); + flush_workqueue(platform->workqueue); + destroy_workqueue(platform->workqueue); + } + if (!platform->pdata.low_power_mode) pm_runtime_put_sync_suspend(&client->dev); |