[v3,2/3] Subject: [PATCH] drm/mediatek/dp: Add HDCP2.x feature for DisplayPort

Message ID	20240608120219.21817-3-mac.shen@mediatek.com (mailing list archive)
State	New
Headers	show Return-Path: <linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org> From: mac.shen <mac.shen@mediatek.com> To: <chunkuang.hu@kernel.org>, <p.zabel@pengutronix.de>, <airlied@gmail.com>, <daniel@ffwll.ch>, <matthias.bgg@gmail.com>, <angelogioacchino.delregno@collabora.com>, <jitao.shi@mediatek.com> CC: <mac.shen@mediatek.com>, <shuijing.li@mediatek.com>, <linux-kernel@vger.kernel.org>, <dri-devel@lists.freedesktop.org>, <linux-mediatek@lists.infradead.org>, <linux-arm-kernel@lists.infradead.org> Subject: [PATCH v3 2/3] Subject: [PATCH] drm/mediatek/dp: Add HDCP2.x feature for DisplayPort Date: Sat, 8 Jun 2024 20:01:05 +0800 Message-ID: <20240608120219.21817-3-mac.shen@mediatek.com> In-Reply-To: <20240608120219.21817-1-mac.shen@mediatek.com> References: <20240608120219.21817-1-mac.shen@mediatek.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: list Sender: "Linux-mediatek" <linux-mediatek-bounces@lists.infradead.org> Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org
Series	Add HDCP feature for DisplayPort \| expand [v3,0/3] Add HDCP feature for DisplayPort [v3,1/3] Subject: [PATCH] drm/mediatek/dp: Add tee client application for HDCP feature [v3,2/3] Subject: [PATCH] drm/mediatek/dp: Add HDCP2.x feature for DisplayPort [v3,3/3] Subject: [PATCH] drm/mediatek/dp: Add HDCP1.x feature for DisplayPort

diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile index f27ddfbd2e12..19b7625ae573 100644 --- a/drivers/gpu/drm/mediatek/Makefile +++ b/drivers/gpu/drm/mediatek/Makefile @@ -28,6 +28,7 @@ mediatek-drm-hdmi-objs := mtk_cec.o \ obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o mtk-dp-objs := tlc_dp_hdcp.o \ + mtk_dp_hdcp2.o \ mtk_dp.o obj-$(CONFIG_DRM_MEDIATEK_DP) += mtk-dp.o diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index 536366956447..12854a04622f 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (c) 2019-2022 MediaTek Inc. + * Copyright (c) 2019-2024 MediaTek Inc. * Copyright (c) 2022 BayLibre */ @@ -8,13 +8,13 @@ #include <drm/display/drm_dp.h> #include <drm/display/drm_dp_helper.h> #include <drm/drm_atomic_helper.h> -#include <drm/drm_bridge.h> #include <drm/drm_crtc.h> #include <drm/drm_edid.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> +#include <drm/display/drm_hdcp_helper.h> #include <linux/arm-smccc.h> #include <linux/clk.h> #include <linux/delay.h> @@ -30,10 +30,10 @@ #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/soc/mediatek/mtk_sip_svc.h> -#include <sound/hdmi-codec.h> -#include <video/videomode.h> +#include "mtk_dp.h" #include "mtk_dp_reg.h" +#include "mtk_dp_hdcp2.h" #define MTK_DP_SIP_CONTROL_AARCH32 MTK_SIP_SMC_CMD(0x523) #define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE (BIT(0) | BIT(5)) @@ -52,43 +52,6 @@ #define MTK_DP_VERSION 0x11 #define MTK_DP_SDP_AUI 0x4 -enum { - MTK_DP_CAL_GLB_BIAS_TRIM = 0, - MTK_DP_CAL_CLKTX_IMPSE, - MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0, - MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1, - MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2, - MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3, - MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0, - MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1, - MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2, - MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3, - MTK_DP_CAL_MAX, -}; - -struct mtk_dp_train_info { - bool sink_ssc; - bool cable_plugged_in; - /* link_rate is in multiple of 0.27Gbps */ - int link_rate; - int lane_count; - unsigned int channel_eq_pattern; -}; - -struct mtk_dp_audio_cfg { - bool detect_monitor; - int sad_count; - int sample_rate; - int word_length_bits; - int channels; -}; - -struct mtk_dp_info { - enum dp_pixelformat format; - struct videomode vm; - struct mtk_dp_audio_cfg audio_cur_cfg; -}; - struct mtk_dp_efuse_fmt { unsigned short idx; unsigned short shift; @@ -98,44 +61,6 @@ struct mtk_dp_efuse_fmt { unsigned short default_val; }; -struct mtk_dp { - bool enabled; - bool need_debounce; - int irq; - u8 max_lanes; - u8 max_linkrate; - u8 rx_cap[DP_RECEIVER_CAP_SIZE]; - u32 cal_data[MTK_DP_CAL_MAX]; - u32 irq_thread_handle; - /* irq_thread_lock is used to protect irq_thread_handle */ - spinlock_t irq_thread_lock; - - struct device *dev; - struct drm_bridge bridge; - struct drm_bridge *next_bridge; - struct drm_connector *conn; - struct drm_device *drm_dev; - struct drm_dp_aux aux; - - const struct mtk_dp_data *data; - struct mtk_dp_info info; - struct mtk_dp_train_info train_info; - - struct platform_device *phy_dev; - struct phy *phy; - struct regmap *regs; - struct timer_list debounce_timer; - - /* For audio */ - bool audio_enable; - hdmi_codec_plugged_cb plugged_cb; - struct platform_device *audio_pdev; - - struct device *codec_dev; - /* protect the plugged_cb as it's used in both bridge ops and audio */ - struct mutex update_plugged_status_lock; -}; - struct mtk_dp_data { int bridge_type; unsigned int smc_cmd; @@ -319,12 +244,24 @@ static struct regmap_config mtk_dp_regmap_config = { .name = "mtk-dp-registers", }; +u64 mtk_dp_get_system_time(void) +{ + return ktime_get_mono_fast_ns(); +} + +u64 mtk_dp_get_time_diff(u64 pre_time) +{ + u64 post_time = mtk_dp_get_system_time(); + + return (post_time - pre_time); +} + static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b) { return container_of(b, struct mtk_dp, bridge); } -static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset) +u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset) { u32 read_val; int ret; @@ -350,8 +287,8 @@ static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offset, u32 val) return ret; } -static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset, - u32 val, u32 mask) +int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset, + u32 val, u32 mask) { int ret = regmap_update_bits(mtk_dp->regs, offset, mask, val); @@ -1865,11 +1802,200 @@ static void mtk_dp_init_port(struct mtk_dp *mtk_dp) mtk_dp_digital_sw_reset(mtk_dp); } +static void mtk_dp_check_sink_esi(struct mtk_dp *mtk_dp) +{ + u8 clear_cp_irq = BIT(2); + + /* hdcp 1.x do not need irq */ + if (mtk_dp->hdcp_info.hdcp2_info.capable) { + dp_tx_hdcp2x_irq(&mtk_dp->hdcp_info); + drm_dp_dpcd_write(&mtk_dp->aux, + DP_DEVICE_SERVICE_IRQ_VECTOR, &clear_cp_irq, 0x1); + } +} + +static int mtk_dp_hpd_sink_event(struct mtk_dp *mtk_dp) +{ + ssize_t ret; + u8 sink_count; + u8 sink_count_200; + + ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT_ESI, &sink_count); + if (ret < 0) { + drm_info(mtk_dp->drm_dev, "Read sink count failed: %zd\n", ret); + return ret; + } + + ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count_200); + if (ret < 0) { + drm_info(mtk_dp->drm_dev, + "Read DP_SINK_COUNT_ESI failed: %zd\n", ret); + return ret; + } + + mtk_dp_check_sink_esi(mtk_dp); + + return 0; +} + +static void mtk_dp_hdcp_get_info(struct mtk_dp *mtk_dp) +{ + dp_tx_hdcp2x_get_info(&mtk_dp->hdcp_info); +} + +static void mtk_dp_hdcp_disable(struct mtk_dp *mtk_dp) +{ + mutex_lock(&mtk_dp->hdcp_mutex); + + if (mtk_dp->hdcp_info.auth_status == AUTH_ZERO) + goto end; + + if (mtk_dp->hdcp_info.auth_version == HDCP_VERSION_2X) + dp_tx_hdcp2x_disabel(&mtk_dp->hdcp_info); + +end: + cancel_delayed_work_sync(&mtk_dp->check_work); + mtk_dp_hdcp_update_value(mtk_dp, DRM_MODE_CONTENT_PROTECTION_DESIRED); + + mutex_unlock(&mtk_dp->hdcp_mutex); +} + +static void mtk_dp_hdcp_check_work(struct work_struct *work) +{ + struct mtk_dp *mtk_dp = container_of(to_delayed_work(work), + struct mtk_dp, check_work); + + if (mtk_dp->hdcp_info.auth_version == HDCP_VERSION_2X && + (!dp_tx_hdcp2x_check_link(&mtk_dp->hdcp_info))) { + schedule_delayed_work(&mtk_dp->check_work, DRM_HDCP2_CHECK_PERIOD_MS); + } +} + +static void mtk_dp_hdcp_handle(struct work_struct *data) +{ + struct mtk_dp *mtk_dp = container_of(data, struct mtk_dp, hdcp_work); + unsigned long check_link_interval = DRM_HDCP_CHECK_PERIOD_MS; + int ret = -EINVAL; + + mutex_lock(&mtk_dp->hdcp_mutex); + + if (mtk_dp->hdcp_info.auth_status == AUTH_PASS) + goto end; + + mtk_dp_hdcp_get_info(mtk_dp); + + if (mtk_dp->hdcp_info.hdcp2_info.capable) { + ret = dp_tx_hdcp2x_enable(&mtk_dp->hdcp_info); + if (!ret) + check_link_interval = DRM_HDCP2_CHECK_PERIOD_MS; + } + + if (!ret) { + schedule_delayed_work(&mtk_dp->check_work, check_link_interval); + mtk_dp_hdcp_update_value(mtk_dp, DRM_MODE_CONTENT_PROTECTION_ENABLED); + } + +end: + mutex_unlock(&mtk_dp->hdcp_mutex); +} + +static void mtk_dp_hdcp_enable(struct mtk_dp *mtk_dp) +{ + if (!mtk_dp->train_info.cable_plugged_in || !mtk_dp->enabled) + return; + + dev_info(mtk_dp->dev, "[HDCP] dp start HDCP work\n"); + queue_work(mtk_dp->hdcp_workqueue, &mtk_dp->hdcp_work); +} + +static void mtk_dp_hdcp_prop_work(struct work_struct *work) +{ + struct mtk_dp *mtk_dp; + struct drm_device *drm_dev; + + mtk_dp = container_of(work, struct mtk_dp, prop_work); + + if (!mtk_dp->conn) { + dev_err(mtk_dp->dev, "[HDCP] Connector is null\n"); + return; + } + + drm_dev = mtk_dp->conn->dev; + + drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL); + + if (mtk_dp->hdcp_info.content_protection != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { + dev_info(mtk_dp->dev, "[HDCP] Update CP, content protection: %d, auth status:%d\n", + mtk_dp->hdcp_info.content_protection, mtk_dp->hdcp_info.auth_status); + + /* only update between ENABLED/DESIRED */ + drm_hdcp_update_content_protection(mtk_dp->conn, + mtk_dp->hdcp_info.content_protection); + } + + drm_modeset_unlock(&drm_dev->mode_config.connection_mutex); +} + +void mtk_dp_hdcp_update_value(struct mtk_dp *mtk_dp, u32 value) +{ + if (mtk_dp->hdcp_info.content_protection == value) + return; + + mtk_dp->hdcp_info.content_protection = value; + if (mtk_dp->hdcp_info.content_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) + return; + + schedule_work(&mtk_dp->prop_work); +} + +static void mtk_dp_hdcp_atomic_check(struct mtk_dp *mtk_dp, struct drm_connector_state *state) +{ + unsigned int current_protection = mtk_dp->hdcp_info.content_protection; + unsigned int new_protection = state->content_protection; + bool type_changed = state->hdcp_content_type != mtk_dp->hdcp_info.hdcp_content_type; + bool protection_changed = current_protection != new_protection; + bool disable = false; + bool enable = false; + + dev_dbg(mtk_dp->dev, "[HDCP] atomic check, old[%d, %d], new[%d, %d]\n", + mtk_dp->hdcp_info.content_protection, mtk_dp->hdcp_info.hdcp_content_type, + state->content_protection, state->hdcp_content_type); + + if (type_changed) { + /* + * With the current protection as ENABLED/DESIRED, + * re-authenticate with new content type if the content type changed. + */ + mtk_dp->hdcp_info.hdcp_content_type = state->hdcp_content_type; + mtk_dp->hdcp_info.hdcp2_info.stream_id_type = state->hdcp_content_type; + + if (current_protection != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) + disable = true; + + if (new_protection != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) + enable = true; + } else if (protection_changed) { + if (new_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) + disable = true; + else + enable = true; + } + + if (disable) + mtk_dp_hdcp_disable(mtk_dp); + + if (enable) { + mtk_dp->hdcp_info.content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED; + mtk_dp_hdcp_enable(mtk_dp); + } +} + static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev) { struct mtk_dp *mtk_dp = dev; unsigned long flags; u32 status; + int ret; if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in) msleep(100); @@ -1894,8 +2020,13 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev) } } - if (status & MTK_DP_THREAD_HPD_EVENT) + if (status & MTK_DP_THREAD_HPD_EVENT) { dev_dbg(mtk_dp->dev, "Receive IRQ from sink devices\n"); + /* check if need clear hpd irq */ + ret = mtk_dp_hpd_sink_event(mtk_dp); + if (ret) + dev_err(mtk_dp->dev, "Fail to process hpd sink event\n"); + } return IRQ_HANDLED; } @@ -2242,6 +2373,7 @@ static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge, struct drm_bridge_state *old_state) { struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge); + struct drm_connector_state *connector_state; int ret; mtk_dp->conn = drm_atomic_get_new_connector_for_encoder(old_state->base.state, @@ -2252,6 +2384,8 @@ static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge, return; } + connector_state = drm_atomic_get_connector_state(old_state->base.state, mtk_dp->conn); + mtk_dp_aux_panel_poweron(mtk_dp, true); /* Training */ @@ -2281,6 +2415,14 @@ static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge, mtk_dp->enabled = true; mtk_dp_update_plugged_status(mtk_dp); + /* Enable hdcp if it's desired */ + dev_dbg(mtk_dp->dev, "hdcp_content_type:%d, content protection: %d", + connector_state->hdcp_content_type, connector_state->content_protection); + if (connector_state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED) { + mtk_dp->hdcp_info.hdcp_content_type = connector_state->hdcp_content_type; + mtk_dp_hdcp_enable(mtk_dp); + } + return; power_off_aux: mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, @@ -2427,6 +2569,8 @@ static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge, drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &mtk_dp->info.vm); + mtk_dp_hdcp_atomic_check(mtk_dp, conn_state); + return 0; } @@ -2666,6 +2810,17 @@ static int mtk_dp_probe(struct platform_device *pdev) if (ret) return ret; + mutex_init(&mtk_dp->hdcp_mutex); + init_waitqueue_head(&mtk_dp->hdcp_info.hdcp2_info.cp_irq_queue); + INIT_WORK(&mtk_dp->hdcp_work, mtk_dp_hdcp_handle); + INIT_WORK(&mtk_dp->prop_work, mtk_dp_hdcp_prop_work); + INIT_DELAYED_WORK(&mtk_dp->check_work, mtk_dp_hdcp_check_work); + mtk_dp->hdcp_workqueue = create_workqueue("mtk_dp_hdcp_work"); + if (!mtk_dp->hdcp_workqueue) { + dev_err(mtk_dp->dev, "failed to create hdcp work queue"); + return -ENOMEM; + } + mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs; mtk_dp->bridge.of_node = dev->of_node; mtk_dp->bridge.type = mtk_dp->data->bridge_type; diff --git a/drivers/gpu/drm/mediatek/mtk_dp.h b/drivers/gpu/drm/mediatek/mtk_dp.h new file mode 100644 index 000000000000..dfeaf12c7d58 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_dp.h @@ -0,0 +1,103 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019-2024 MediaTek Inc. + */ + +#ifndef _MTK_DP_H_ +#define _MTK_DP_H_ + +#include "tlc_dp_hdcp.h" +#include <drm/drm_bridge.h> +#include <sound/hdmi-codec.h> +#include <video/videomode.h> + +#define MS_TO_NS(x) ((x) * NSEC_PER_MSEC) + +enum { + MTK_DP_CAL_GLB_BIAS_TRIM = 0, + MTK_DP_CAL_CLKTX_IMPSE, + MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0, + MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1, + MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2, + MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3, + MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0, + MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1, + MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2, + MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3, + MTK_DP_CAL_MAX, +}; + +struct mtk_dp_audio_cfg { + bool detect_monitor; + int sad_count; + int sample_rate; + int word_length_bits; + int channels; +}; + +struct mtk_dp_info { + enum dp_pixelformat format; + struct videomode vm; + struct mtk_dp_audio_cfg audio_cur_cfg; +}; + +struct mtk_dp_train_info { + bool sink_ssc; + bool cable_plugged_in; + /* link_rate is in multiple of 0.27Gbps */ + int link_rate; + int lane_count; + unsigned int channel_eq_pattern; +}; + +struct mtk_dp { + bool enabled; + bool need_debounce; + int irq; + u8 max_lanes; + u8 max_linkrate; + u8 rx_cap[DP_RECEIVER_CAP_SIZE]; + u32 cal_data[MTK_DP_CAL_MAX]; + u32 irq_thread_handle; + /* irq_thread_lock is used to protect irq_thread_handle */ + spinlock_t irq_thread_lock; + + struct device *dev; + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct drm_connector *conn; + struct drm_device *drm_dev; + struct drm_dp_aux aux; + + const struct mtk_dp_data *data; + struct mtk_dp_info info; + struct mtk_dp_train_info train_info; + struct mtk_hdcp_info hdcp_info; + struct work_struct hdcp_work; + struct work_struct prop_work; + struct delayed_work check_work; + struct workqueue_struct *hdcp_workqueue; + /* This mutex is used to synchronize HDCP operations in the driver */ + struct mutex hdcp_mutex; + + struct platform_device *phy_dev; + struct phy *phy; + struct regmap *regs; + struct timer_list debounce_timer; + + /* For audio */ + bool audio_enable; + hdmi_codec_plugged_cb plugged_cb; + struct platform_device *audio_pdev; + + struct device *codec_dev; + /* protect the plugged_cb as it's used in both bridge ops and audio */ + struct mutex update_plugged_status_lock; +}; + +u64 mtk_dp_get_system_time(void); +u64 mtk_dp_get_time_diff(u64 pre_time); +u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset); +int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset, u32 val, u32 mask); +void mtk_dp_hdcp_update_value(struct mtk_dp *mtk_dp, u32 value); +#endif /* _MTK_DP_H_ */ diff --git a/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c b/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c new file mode 100644 index 000000000000..e8affa4343c1 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c @@ -0,0 +1,944 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019-2024 MediaTek Inc. + */ + +#include <drm/display/drm_hdcp_helper.h> + +#include "mtk_dp_hdcp2.h" +#include "mtk_dp_reg.h" +#include "mtk_dp.h" + +#define HDCP2_LC_RETRY_CNT 3 + +static u8 t_rtx[HDCP_2_2_RTX_LEN] = { + 0x18, 0xfa, 0xe4, 0x20, 0x6a, 0xfb, 0x51, 0x49 +}; + +static u8 t_tx_caps[HDCP_2_2_TXCAPS_LEN] = { + 0x02, 0x00, 0x00 +}; + +static u8 t_rn[HDCP_2_2_RN_LEN] = { + 0x32, 0x75, 0x3e, 0xa8, 0x78, 0xa6, 0x38, 0x1c +}; + +static u8 t_riv[HDCP_2_2_RIV_LEN] = { + 0x40, 0x2b, 0x6b, 0x43, 0xc5, 0xe8, 0x86, 0xd8 +}; + +static void dp_tx_hdcp2x_fill_stream_type(struct mtk_hdcp_info *hdcp_info, u8 uc_type) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + + mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34D0, uc_type, 0xff); +} + +static void dp_tx_hdcp2x_set_auth_pass(struct mtk_hdcp_info *hdcp_info, bool enable) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + + if (enable) { + mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3400, + HDCP_SEL_DP_TRANS_P0_MASK, HDCP_SEL_DP_TRANS_P0_MASK); + mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4, + HDCP22_AUTH_DONE_DP_TRANS_P0_MASK, + HDCP22_AUTH_DONE_DP_TRANS_P0_MASK); + } else { + mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3400, 0, HDCP_SEL_DP_TRANS_P0_MASK); + mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4, 0, + HDCP22_AUTH_DONE_DP_TRANS_P0_MASK); + } +} + +static int dp_tx_hdcp2x_enable_auth(struct mtk_hdcp_info *hdcp_info, bool enable) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u32 version; + int ret; + + dp_tx_hdcp2x_set_auth_pass(hdcp_info, enable); + if (!enable) { + ret = tee_hdcp_enable_encrypt(hdcp_info, enable, HDCP_NONE); + if (ret) + return ret; + mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000, 0, HDCP_FRAME_EN_DP_ENC0_P0); + + return 0; + } + + if (HDCP_2_2_HDCP1_DEVICE_CONNECTED(hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info[1])) + version = HDCP_V1; + else if (HDCP_2_2_HDCP_2_0_REP_CONNECTED + (hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info[1])) + version = HDCP_V2; + else + version = HDCP_V2_3; + + ret = tee_hdcp_enable_encrypt(hdcp_info, enable, version); + if (ret) + return ret; + mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000, + HDCP_FRAME_EN_DP_ENC0_P0, HDCP_FRAME_EN_DP_ENC0_P0); + + return 0; +} + +static int dp_tx_hdcp2x_init(struct mtk_hdcp_info *hdcp_info) +{ + int ret; + + memset(&hdcp_info->hdcp2_info.hdcp_tx, 0, sizeof(struct hdcp2_info_tx)); + memset(&hdcp_info->hdcp2_info.hdcp_rx, 0, sizeof(struct hdcp2_info_rx)); + memset(&hdcp_info->hdcp2_info.ake_stored_km, 0, sizeof(struct hdcp2_ake_stored_km)); + memcpy(hdcp_info->hdcp2_info.hdcp_tx.ake_init.r_tx, t_rtx, HDCP_2_2_RTX_LEN); + memcpy(&hdcp_info->hdcp2_info.hdcp_tx.tx_caps, t_tx_caps, HDCP_2_2_TXCAPS_LEN); + memcpy(hdcp_info->hdcp2_info.hdcp_tx.lc_init.r_n, t_rn, HDCP_2_2_RN_LEN); + memcpy(hdcp_info->hdcp2_info.hdcp_tx.send_eks.riv, t_riv, HDCP_2_2_RIV_LEN); + + ret = dp_tx_hdcp2x_enable_auth(hdcp_info, false); + if (ret) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_inc_seq_num_m(struct mtk_hdcp_info *hdcp_info) +{ + u32 tmp = drm_hdcp_be24_to_cpu(hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_m); + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + + if (tmp == HDCP_2_2_SEQ_NUM_MAX) { + dev_err(mtk_dp->dev, "[HDCP2.X] With seq num max\n"); + return -EINVAL; + } + + tmp++; + + drm_hdcp_cpu_to_be24(hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_m, tmp); + + return 0; +} + +static int dp_tx_hdcp2x_process_rep_auth_stream_manage(struct mtk_hdcp_info *hdcp_info) +{ + hdcp_info->hdcp2_info.hdcp_tx.k[0] = 0x00; + hdcp_info->hdcp2_info.hdcp_tx.k[1] = 0x01; + + hdcp_info->hdcp2_info.hdcp_tx.stream_id_type[0] = 0x00; /* Payload ID */ + hdcp_info->hdcp2_info.hdcp_tx.stream_id_type[1] = hdcp_info->hdcp2_info.stream_id_type; + + return dp_tx_hdcp2x_inc_seq_num_m(hdcp_info); +} + +static int dp_tx_hdcp2x_recv_rep_auth_send_recv_id_list(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u32 len = 0, len_recv_id_list = 0; + u8 *buffer = NULL; + int ret = 0; + + len_recv_id_list = hdcp_info->hdcp2_info.device_count * HDCP_2_2_RECEIVER_ID_LEN; + len = len_recv_id_list + HDCP_2_2_RXINFO_LEN + HDCP_2_2_SEQ_NUM_LEN; + buffer = kmalloc(len, GFP_KERNEL); + if (!buffer) { + dev_err(mtk_dp->dev, "[HDCP2.X] Out of memory\n"); + return -ENOMEM; + } + + memcpy(buffer, hdcp_info->hdcp2_info.hdcp_rx.recvid_list.receiver_ids, + len_recv_id_list); + memcpy(buffer + len_recv_id_list, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info, HDCP_2_2_RXINFO_LEN); + memcpy(buffer + len_recv_id_list + HDCP_2_2_RXINFO_LEN, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.seq_num_v, HDCP_2_2_SEQ_NUM_LEN); + + ret = tee_hdcp2_compute_compare_v(hdcp_info, buffer, len, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.v_prime, + hdcp_info->hdcp2_info.hdcp_tx.send_ack.v); + + kfree(buffer); + + return ret; +} + +static int dp_tx_hdcp2x_recv_rep_auth_stream_ready(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u8 *buffer = NULL; + u32 len = 0; + int ret = 0; + + len = HDCP2_STREAMID_TYPE_LEN + HDCP_2_2_SEQ_NUM_LEN; + buffer = kmalloc(len, GFP_KERNEL); + if (!buffer) { + dev_err(mtk_dp->dev, "[HDCP2.X] Out of memory\n"); + return -ENOMEM; + } + + memcpy(buffer, hdcp_info->hdcp2_info.hdcp_tx.stream_id_type, HDCP2_STREAMID_TYPE_LEN); + memcpy(buffer + HDCP2_STREAMID_TYPE_LEN, + hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_m, + HDCP_2_2_SEQ_NUM_LEN); + ret = tee_hdcp2_compute_compare_m(hdcp_info, buffer, len, + hdcp_info->hdcp2_info.hdcp_rx.stream_ready.m_prime); + + kfree(buffer); + + return ret; +} + +static void dp_tx_hdcp2x_wait_for_cp_irq(struct mtk_hdcp_info *hdcp_info, int timeout) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + long ret; + +#define C (hdcp_info->hdcp2_info.cp_irq_cached != atomic_read(&hdcp_info->hdcp2_info.cp_irq)) + ret = wait_event_interruptible_timeout(hdcp_info->hdcp2_info.cp_irq_queue, C, + msecs_to_jiffies(timeout)); + if (!ret) + dev_dbg(mtk_dp->dev, "[HDCP2.X] Timedout at waiting for CP_IRQ\n"); +} + +static int dp_tx_hdcp2x_read_ake_send_cert(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ktime_t msg_end; + bool msg_expired; + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_AKE_SEND_CERT\n"); + + mdelay(HDCP_2_2_CERT_TIMEOUT_MS); + + msg_end = ktime_add_ms(ktime_get_raw(), HDCP_2_2_DP_CERT_READ_TIMEOUT_MS); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_AKE_SEND_CERT_OFFSET, + (void *)&hdcp_info->hdcp2_info.hdcp_rx.cert_rx, HDCP2_CERTRX_LEN); + if (ret < 0) + return ret; + + msg_expired = ktime_after(ktime_get_raw(), msg_end); + if (msg_expired) + dev_dbg(mtk_dp->dev, "[HDCP2.X] Timeout to read Ake send cert\n"); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RRX_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.send_cert.r_rx, HDCP_2_2_RRX_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RX_CAPS_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.send_cert.rx_caps, + HDCP_2_2_RXCAPS_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_read_ake_send_hprime(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ktime_t msg_end; + bool msg_expired; + u8 rx_status = 0; + int timeout; + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_AKE_SEND_HPRIME\n"); + + timeout = hdcp_info->hdcp2_info.stored_km ? + HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS : HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS; + + dp_tx_hdcp2x_wait_for_cp_irq(hdcp_info, timeout); + hdcp_info->hdcp2_info.cp_irq_cached = atomic_read(&hdcp_info->hdcp2_info.cp_irq); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RXSTATUS_OFFSET, &rx_status, + HDCP_2_2_DP_RXSTATUS_LEN); + if (ret != HDCP_2_2_DP_RXSTATUS_LEN) + return ret >= 0 ? -EIO : ret; + + if (!HDCP_2_2_DP_RXSTATUS_H_PRIME(rx_status)) + return -EAGAIN; + + msg_end = ktime_add_ms(ktime_get_raw(), HDCP_2_2_DP_HPRIME_READ_TIMEOUT_MS); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_AKE_SEND_HPRIME_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.send_hprime.h_prime, + HDCP_2_2_H_PRIME_LEN); + if (ret < 0) + return ret; + + msg_expired = ktime_after(ktime_get_raw(), msg_end); + if (msg_expired) + dev_dbg(mtk_dp->dev, "[HDCP2.X] Timeout to read AKE hprime\n"); + + return 0; +} + +static int dp_tx_hdcp2x_read_ake_send_pairing_info(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ktime_t msg_end; + bool msg_expired; + u8 rx_status = 0; + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_AKE_SEND_PAIRING_INFO\n"); + + dp_tx_hdcp2x_wait_for_cp_irq(hdcp_info, HDCP_2_2_PAIRING_TIMEOUT_MS); + hdcp_info->hdcp2_info.cp_irq_cached = atomic_read(&hdcp_info->hdcp2_info.cp_irq); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RXSTATUS_OFFSET, &rx_status, + HDCP_2_2_DP_RXSTATUS_LEN); + if (ret != HDCP_2_2_DP_RXSTATUS_LEN) + return ret >= 0 ? -EIO : ret; + + if (!HDCP_2_2_DP_RXSTATUS_PAIRING(rx_status)) + return -EAGAIN; + + msg_end = ktime_add_ms(ktime_get_raw(), HDCP_2_2_DP_PAIRING_READ_TIMEOUT_MS); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_AKE_SEND_PAIRING_INFO_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.pairing_info.e_kh_km, + HDCP_2_2_E_KH_KM_LEN); + if (ret < 0) + return ret; + + msg_expired = ktime_after(ktime_get_raw(), msg_end); + if (msg_expired) + dev_err(mtk_dp->dev, "[HDCP2.X] Timeout to read pairing info\n"); + + return 0; +} + +static int dp_tx_hdcp2x_read_lc_send_lprime(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_LC_SEND_LPRIME\n"); + + mdelay(HDCP_2_2_DP_LPRIME_TIMEOUT_MS); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_LC_SEND_LPRIME_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.send_lprime.l_prime, + HDCP_2_2_L_PRIME_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_read_rep_send_recvid_list(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u8 rx_status = 0; + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_REP_SEND_RECVID_LIST\n"); + + dp_tx_hdcp2x_wait_for_cp_irq(hdcp_info, HDCP_2_2_RECVID_LIST_TIMEOUT_MS); + hdcp_info->hdcp2_info.cp_irq_cached = atomic_read(&hdcp_info->hdcp2_info.cp_irq); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RXSTATUS_OFFSET, &rx_status, + HDCP_2_2_DP_RXSTATUS_LEN); + if (ret != HDCP_2_2_DP_RXSTATUS_LEN) + return ret >= 0 ? -EIO : ret; + + if (!HDCP_2_2_DP_RXSTATUS_READY(rx_status)) { + dev_err(mtk_dp->dev, "[HDCP2.X] RX status no ready\n"); + return -EAGAIN; + } + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REP_SEND_RECVID_LIST_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info, + HDCP_2_2_RXINFO_LEN); + if (ret < 0) + return ret; + + hdcp_info->hdcp2_info.device_count = + (HDCP_2_2_DEV_COUNT_HI(hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info[0]) << 4 | + HDCP_2_2_DEV_COUNT_LO(hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info[1])); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_SEQ_NUM_V_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.seq_num_v, + HDCP_2_2_SEQ_NUM_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_VPRIME_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.v_prime, + HDCP_2_2_V_PRIME_HALF_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RECV_ID_LIST_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.receiver_ids, + hdcp_info->hdcp2_info.device_count * HDCP_2_2_RECEIVER_ID_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_read_rep_stream_ready(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_REP_STREAM_READY\n"); + + mdelay(HDCP_2_2_STREAM_READY_TIMEOUT_MS); + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REP_STREAM_READY_OFFSET, + hdcp_info->hdcp2_info.hdcp_rx.stream_ready.m_prime, + HDCP_2_2_MPRIME_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_ake_init(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_AKE_Init\n"); + + ret = tee_hdcp2_soft_rst(hdcp_info); + if (ret) + return ret; + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_AKE_INIT_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.ake_init.r_tx, HDCP_2_2_RTX_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_TXCAPS_OFFSET, + (void *)&hdcp_info->hdcp2_info.hdcp_tx.tx_caps, + HDCP_2_2_TXCAPS_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_ake_no_stored_km(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_AKE_NO_STORED_KM\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_AKE_NO_STORED_KM_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.no_stored_km.e_kpub_km, + HDCP_2_2_E_KPUB_KM_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_ake_stored_km(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_AKE_STORED_KM\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_AKE_STORED_KM_OFFSET, + hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m, + HDCP_2_2_E_KH_KM_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_M_OFFSET, + hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m + + HDCP_2_2_E_KH_KM_LEN, + HDCP_2_2_E_KH_KM_M_LEN - HDCP_2_2_E_KH_KM_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_lc_init(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_LC_INIT\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_LC_INIT_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.lc_init.r_n, HDCP_2_2_RN_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_ske_send_eks(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_SKE_SEND_EKS\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_SKE_SEND_EKS_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.send_eks.e_dkey_ks, + HDCP_2_2_E_DKEY_KS_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_RIV_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.send_eks.riv, HDCP_2_2_RIV_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_stream_type(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] Write stream type\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_STREAM_TYPE_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.stream_id_type, 1); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_send_ack(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_SEND_ACK\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REP_SEND_ACK_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.send_ack.v, + HDCP_2_2_V_PRIME_HALF_LEN); + if (ret < 0) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_write_stream_manage(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + ssize_t ret; + + dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_STREAM_MANAGE\n"); + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REP_STREAM_MANAGE_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_m, + HDCP_2_2_SEQ_NUM_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_K_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.k, HDCP2_K_LEN); + if (ret < 0) + return ret; + + ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_STREAM_ID_TYPE_OFFSET, + hdcp_info->hdcp2_info.hdcp_tx.stream_id_type, + HDCP2_STREAMID_TYPE_LEN); + if (ret < 0) + return ret; + + dp_tx_hdcp2x_fill_stream_type(hdcp_info, hdcp_info->hdcp2_info.stream_id_type); + + return 0; +} + +/* Authentication flow starts from here */ +static int dp_tx_hdcp2x_key_exchange(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + bool stored; + int ret; + + if (!hdcp_info->hdcp2_info.capable) + return -EAGAIN; + + ret = dp_tx_hdcp2x_init(hdcp_info); + if (ret) + return ret; + + ret = dp_tx_hdcp2x_write_ake_init(hdcp_info); + if (ret) + return ret; + + ret = dp_tx_hdcp2x_read_ake_send_cert(hdcp_info); + if (ret) + return ret; + + hdcp_info->hdcp2_info.repeater = + HDCP_2_2_RX_REPEATER(hdcp_info->hdcp2_info.hdcp_rx.send_cert.rx_caps[2]); + + if (drm_hdcp_check_ksvs_revoked(mtk_dp->drm_dev, + hdcp_info->hdcp2_info.hdcp_rx.send_cert.cert_rx.receiver_id, + 1) > 0) { + dev_err(mtk_dp->dev, "[HDCP2.X] Receiver ID is revoked\n"); + return -EPERM; + } + + ret = tee_ake_certificate(hdcp_info, + (u8 *)&hdcp_info->hdcp2_info.hdcp_rx.cert_rx, &stored, + hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m + + HDCP_2_2_E_KH_KM_LEN, + hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m); + if (ret) + return ret; + + hdcp_info->hdcp2_info.stored_km = stored; + + if (!hdcp_info->hdcp2_info.stored_km) { + ret = tee_enc_rsaes_oaep(hdcp_info, + hdcp_info->hdcp2_info.hdcp_tx.no_stored_km.e_kpub_km); + if (ret) + return ret; + + ret = dp_tx_hdcp2x_write_ake_no_stored_km(hdcp_info); + if (ret) + return ret; + + } else { + ret = dp_tx_hdcp2x_write_ake_stored_km(hdcp_info); + if (ret) + return ret; + } + + ret = dp_tx_hdcp2x_read_ake_send_hprime(hdcp_info); + if (ret) + return ret; + + ret = tee_ake_h_prime(hdcp_info, + hdcp_info->hdcp2_info.hdcp_tx.ake_init.r_tx, + hdcp_info->hdcp2_info.hdcp_rx.send_cert.r_rx, + hdcp_info->hdcp2_info.hdcp_rx.send_cert.rx_caps, + (u8 *)&hdcp_info->hdcp2_info.hdcp_tx.tx_caps, + hdcp_info->hdcp2_info.hdcp_rx.send_hprime.h_prime, + HDCP_2_2_H_PRIME_LEN); + if (ret) { + if (hdcp_info->hdcp2_info.stored_km) + tee_clear_paring(hdcp_info); + return ret; + } + + if (!hdcp_info->hdcp2_info.stored_km) { + ret = dp_tx_hdcp2x_read_ake_send_pairing_info(hdcp_info); + if (ret) + return ret; + + /* Store m, km, Ekh(km) */ + ret = tee_ake_paring(hdcp_info, + hdcp_info->hdcp2_info.hdcp_rx.pairing_info.e_kh_km); + if (ret) + return ret; + } + + return 0; +} + +static int dp_tx_hdcp2x_locality_check(struct mtk_hdcp_info *hdcp_info) +{ + int ret, i, tries = HDCP2_LC_RETRY_CNT; + + for (i = 0; i < tries; i++) { + ret = dp_tx_hdcp2x_write_lc_init(hdcp_info); + if (ret) + continue; + + ret = dp_tx_hdcp2x_read_lc_send_lprime(hdcp_info); + if (ret) + continue; + + ret = tee_lc_l_prime(hdcp_info, hdcp_info->hdcp2_info.hdcp_tx.lc_init.r_n, + hdcp_info->hdcp2_info.hdcp_rx.send_lprime.l_prime, + HDCP_2_2_L_PRIME_LEN); + if (!ret) + return 0; + } + + return ret; +} + +static int dp_tx_hdcp2x_session_key_exchange(struct mtk_hdcp_info *hdcp_info) +{ + int ret; + + ret = tee_ske_enc_ks(hdcp_info, hdcp_info->hdcp2_info.hdcp_tx.send_eks.riv, + hdcp_info->hdcp2_info.hdcp_tx.send_eks.e_dkey_ks); + if (ret) + return ret; + + ret = dp_tx_hdcp2x_write_ske_send_eks(hdcp_info); + if (ret) + return ret; + + return 0; +} + +static +int dp_tx_hdcp2x_authenticate_repeater(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u8 *rx_info; + int ret; + + ret = dp_tx_hdcp2x_read_rep_send_recvid_list(hdcp_info); + if (ret) + return ret; + + rx_info = hdcp_info->hdcp2_info.hdcp_rx.recvid_list.rx_info; + + if (HDCP_2_2_MAX_CASCADE_EXCEEDED(rx_info[1]) || + HDCP_2_2_MAX_DEVS_EXCEEDED(rx_info[1])) { + dev_err(mtk_dp->dev, "[HDCP2.X] Topology max size exceeded\n"); + return -EINVAL; + } + + if (drm_hdcp_check_ksvs_revoked(mtk_dp->drm_dev, + hdcp_info->hdcp2_info.hdcp_rx.recvid_list.receiver_ids, + hdcp_info->hdcp2_info.device_count) > 0) { + dev_err(mtk_dp->dev, "[HDCP2.X] Revoked receiver ID(s) is in list\n"); + return -EPERM; + } + + ret = dp_tx_hdcp2x_recv_rep_auth_send_recv_id_list(hdcp_info); + if (ret) + return -EINVAL; + + ret = dp_tx_hdcp2x_write_send_ack(hdcp_info); + if (ret) + return ret; + + return 0; +} + +static int dp_tx_hdcp2x_authenticate(struct mtk_hdcp_info *hdcp_info) +{ + int ret; + + ret = dp_tx_hdcp2x_key_exchange(hdcp_info); + if (ret) + return ret; + + ret = dp_tx_hdcp2x_locality_check(hdcp_info); + if (ret) + return ret; + + ret = dp_tx_hdcp2x_session_key_exchange(hdcp_info); + if (ret) + return ret; + + if (!hdcp_info->hdcp2_info.repeater) { + ret = dp_tx_hdcp2x_write_stream_type(hdcp_info); + if (ret) + return ret; + } + + if (hdcp_info->hdcp2_info.repeater) { + ret = dp_tx_hdcp2x_authenticate_repeater(hdcp_info); + if (ret) + return ret; + } + + return 0; +} + +static +int dp_tx_hdcp2x_propagate_stream_management_info(struct mtk_hdcp_info *hdcp_info) +{ + int i, ret, tries = 3; + + if (!hdcp_info->hdcp2_info.repeater) + return 0; + + for (i = 0; i < tries; i++) { + ret = dp_tx_hdcp2x_process_rep_auth_stream_manage(hdcp_info); + if (ret) + continue; + + ret = dp_tx_hdcp2x_write_stream_manage(hdcp_info); + if (ret) + continue; + + ret = dp_tx_hdcp2x_read_rep_stream_ready(hdcp_info); + if (ret) + continue; + + ret = dp_tx_hdcp2x_recv_rep_auth_stream_ready(hdcp_info); + if (!ret) + return 0; + } + + return ret; +} + +void dp_tx_hdcp2x_get_info(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u8 tmp[3]; + ssize_t ret; + + ret = drm_dp_dpcd_read(&mtk_dp->aux, + DP_HDCP_2_2_REG_RX_CAPS_OFFSET, tmp, HDCP_2_2_RXCAPS_LEN); + if (ret < 0) + return; + + if (!HDCP_2_2_DP_HDCP_CAPABLE(tmp[2]) || tmp[0] != HDCP_2_2_RX_CAPS_VERSION_VAL) { + hdcp_info->hdcp2_info.capable = false; + } else { + hdcp_info->hdcp2_info.capable = true; + hdcp_info->hdcp2_info.repeater = HDCP_2_2_RX_REPEATER(tmp[2]); + } + + dev_info(mtk_dp->dev, "[HDCP2.X] Capable: %d, Reapeater: %d\n", + hdcp_info->hdcp2_info.capable, + hdcp_info->hdcp2_info.repeater); +} + +int dp_tx_hdcp2x_enable(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + int ret, i, tries = 3; + + hdcp_info->auth_status = AUTH_INIT; + + ret = tee_add_device(hdcp_info, HDCP_VERSION_2X); + if (ret) + goto fail2; + + for (i = 0; i < tries; i++) { + ret = dp_tx_hdcp2x_authenticate(hdcp_info); + if (ret) + continue; + + ret = dp_tx_hdcp2x_propagate_stream_management_info(hdcp_info); + if (!ret) { + dev_dbg(mtk_dp->dev, "[HDCP2.X] Stream management done\n"); + break; + } + } + if (i == tries) + goto fail1; + + msleep(HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN); + ret = dp_tx_hdcp2x_enable_auth(hdcp_info, true); + if (!ret) { + hdcp_info->auth_version = HDCP_VERSION_2X; + hdcp_info->auth_status = AUTH_PASS; + dev_info(mtk_dp->dev, "[HDCP2.X] Authentication done\n"); + + return 0; + } + +fail1: + tee_remove_device(hdcp_info); + +fail2: + hdcp_info->auth_status = AUTH_FAIL; + dev_err(mtk_dp->dev, "[HDCP2.X] Authentication fail\n"); + + return ret; +} + +int dp_tx_hdcp2x_disabel(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + int ret; + + if (hdcp_info->auth_status == AUTH_PASS) { + ret = dp_tx_hdcp2x_enable_auth(hdcp_info, false); + if (ret) + return ret; + } + + tee_remove_device(hdcp_info); + + hdcp_info->auth_version = HDCP_NONE; + hdcp_info->auth_status = AUTH_ZERO; + dev_info(mtk_dp->dev, "[HDCP2.X] Disable Authentication\n"); + + return 0; +} + +int dp_tx_hdcp2x_check_link(struct mtk_hdcp_info *hdcp_info) +{ + struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info); + u8 rx_status; + int ret = -EINVAL; + int tmp = 0; + + mutex_lock(&mtk_dp->hdcp_mutex); + + if (mtk_dp->hdcp_info.auth_status != AUTH_PASS) + goto end; + + if (!mtk_dp->train_info.cable_plugged_in || !mtk_dp->enabled) + goto disable; + + ret = drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RXSTATUS_OFFSET, &rx_status, + HDCP_2_2_DP_RXSTATUS_LEN); + if (ret != HDCP_2_2_DP_RXSTATUS_LEN) { + dev_dbg(mtk_dp->dev, "[HDCP2.X] Read bstatus failed, reauth\n"); + goto disable; + } + + if (HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(rx_status)) + tmp = REAUTH_REQUEST; + else if (HDCP_2_2_DP_RXSTATUS_LINK_FAILED(rx_status)) + tmp = LINK_INTEGRITY_FAILURE; + else if (HDCP_2_2_DP_RXSTATUS_READY(rx_status)) + tmp = TOPOLOGY_CHANGE; + + if (tmp == LINK_PROTECTED) { + mtk_dp_hdcp_update_value(mtk_dp, DRM_MODE_CONTENT_PROTECTION_ENABLED); + ret = 0; + goto end; + } + + if (tmp == TOPOLOGY_CHANGE) { + ret = dp_tx_hdcp2x_authenticate_repeater(hdcp_info); + if (!ret) { + mtk_dp_hdcp_update_value(mtk_dp, DRM_MODE_CONTENT_PROTECTION_ENABLED); + goto end; + } + } else { + dev_info(mtk_dp->dev, "[HDCP2.X] link failed with:0x%x, retrying auth\n", tmp); + } + +disable: + ret = dp_tx_hdcp2x_disabel(hdcp_info); + if (ret || !mtk_dp->train_info.cable_plugged_in || !mtk_dp->enabled) { + ret = -EAGAIN; + mtk_dp_hdcp_update_value(mtk_dp, DRM_MODE_CONTENT_PROTECTION_DESIRED); + goto end; + } + + ret = dp_tx_hdcp2x_enable(hdcp_info); + if (ret) + mtk_dp_hdcp_update_value(mtk_dp, DRM_MODE_CONTENT_PROTECTION_DESIRED); + +end: + mutex_unlock(&mtk_dp->hdcp_mutex); + + return ret; +} + +void dp_tx_hdcp2x_irq(struct mtk_hdcp_info *hdcp_info) +{ + atomic_inc(&hdcp_info->hdcp2_info.cp_irq); + wake_up_all(&hdcp_info->hdcp2_info.cp_irq_queue); +} diff --git a/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h b/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h new file mode 100644 index 000000000000..0532bcb9958b --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019-2024 MediaTek Inc. + */ + +#ifndef _MTK_dp_HDCP2_H_ +#define _MTK_dp_HDCP2_H_ + +#include "tlc_dp_hdcp.h" + +#define HDCP_VERSION_2X 2 + +enum check_link { + LINK_PROTECTED = 0, + TOPOLOGY_CHANGE, + LINK_INTEGRITY_FAILURE, + REAUTH_REQUEST +}; + +void dp_tx_hdcp2x_get_info(struct mtk_hdcp_info *hdcp_info); +int dp_tx_hdcp2x_enable(struct mtk_hdcp_info *hdcp_info); +int dp_tx_hdcp2x_disabel(struct mtk_hdcp_info *hdcp_info); +int dp_tx_hdcp2x_check_link(struct mtk_hdcp_info *hdcp_info); +void dp_tx_hdcp2x_irq(struct mtk_hdcp_info *hdcp_info); +#endif /* _MTK_dp_HDCP2_H_ */ diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h b/drivers/gpu/drm/mediatek/mtk_dp_reg.h index 709b79480693..8c60983a26ed 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp_reg.h +++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* - * Copyright (c) 2019-2022 MediaTek Inc. + * Copyright (c) 2019-2024 MediaTek Inc. * Copyright (c) 2022 BayLibre */ #ifndef _MTK_DP_REG_H_ @@ -83,6 +83,7 @@ #define VIDEO_MUTE_SW_DP_ENC0_P0 BIT(2) #define VIDEO_MUTE_SEL_DP_ENC0_P0 BIT(3) #define ENHANCED_FRAME_EN_DP_ENC0_P0 BIT(4) +#define HDCP_FRAME_EN_DP_ENC0_P0 BIT(5) #define MTK_DP_ENC0_P0_3004 0x3004 #define VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK BIT(8) #define DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0 BIT(9) @@ -245,6 +246,7 @@ /* offset: TRANS_OFFSET (0x3400) */ #define MTK_DP_TRANS_P0_3400 0x3400 +#define HDCP_SEL_DP_TRANS_P0_MASK BIT(11) #define PATTERN1_EN_DP_TRANS_P0_MASK BIT(12) #define PATTERN2_EN_DP_TRANS_P0_MASK BIT(13) #define PATTERN3_EN_DP_TRANS_P0_MASK BIT(14) @@ -276,7 +278,11 @@ #define HPD_INT_THD_ECO_DP_TRANS_P0_MASK GENMASK(1, 0) #define HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT BIT(1) #define MTK_DP_TRANS_P0_34A4 0x34a4 +#define HDCP22_AUTH_DONE_DP_TRANS_P0_MASK BIT(4) +#define R0_AVAILABLE_DP_TRANS_P0 BIT(12) +#define REPEATER_I_DP_TRANS_P0_MASK BIT(15) #define LANE_NUM_DP_TRANS_P0_MASK GENMASK(3, 2) +#define MTK_DP_TRANS_P0_34D0 0x34D0 #define MTK_DP_TRANS_P0_3540 0x3540 #define FEC_EN_DP_TRANS_P0_MASK BIT(0) #define FEC_CLOCK_EN_MODE_DP_TRANS_P0 BIT(3) diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index bfe8653005db..6f85753c0c82 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -25,6 +25,7 @@ #include <drm/drm_edid.h> #include <drm/drm_of.h> #include <drm/drm_simple_kms_helper.h> +#include <drm/display/drm_hdcp_helper.h> #include "mtk_ddp_comp.h" #include "mtk_disp_drv.h" @@ -820,6 +821,8 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data) } drm_connector_attach_encoder(dpi->connector, &dpi->encoder); + drm_connector_attach_content_protection_property(dpi->connector, true); + return 0; err_cleanup:

[v3,2/3] Subject: [PATCH] drm/mediatek/dp: Add HDCP2.x feature for DisplayPort

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