From patchwork Fri Mar 31 22:12:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Yacoub X-Patchwork-Id: 668902 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE4EBC761A6 for ; Fri, 31 Mar 2023 22:13:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233513AbjCaWN2 (ORCPT ); Fri, 31 Mar 2023 18:13:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233544AbjCaWNN (ORCPT ); Fri, 31 Mar 2023 18:13:13 -0400 Received: from mail-yw1-x1133.google.com (mail-yw1-x1133.google.com [IPv6:2607:f8b0:4864:20::1133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36E0920C07 for ; Fri, 31 Mar 2023 15:12:42 -0700 (PDT) Received: by mail-yw1-x1133.google.com with SMTP id 00721157ae682-54184571389so440904067b3.4 for ; Fri, 31 Mar 2023 15:12:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1680300761; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=zmW/qErFdGERfJoD2MZQu4nGjRcnztEc/MF6gkYsel4=; b=K4t24nOH7SxcyZ3NNNZv13iY03mmYTKp8uAec2s8dXsh+BOPLBK2IEwGMpjAY60G/S Bqx4av/Nln0VWV09YYGx55vAVjanz2H4Uq9PY82yFa44jMXgAFveYRd1IZYPBRar+4Xj oQpkL4VSaDQA46Vc2EeUnfkQjI6LZ1HTWwQFE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680300761; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zmW/qErFdGERfJoD2MZQu4nGjRcnztEc/MF6gkYsel4=; b=1B5f2q2fOX557xqq+1Rs5GDxIXlnHbY2Dup458EqNA9N9Wz4ydUpO7EgUpZLIDjt1v utYH4UVadE5PvhVdO7BB7lRZZbcRMyMIwHZbBNyMHiEaMKHXVxF7AQZOOO8rqkvn2bvj SPE3SseB8rygD17JxXb0KRQIDRoJi+Dbr9A3Wu6NXzzOTuqat7YugTrcNMUD1KRc4nHO RT2U9csCLQ2Xo/RzQlqpwZeEYE7h9HpodR1rvPfCTq6ut57pc00h7M0vuf4DKhFdI1Lr IUq28idzRCVpClvuVAYqxN550DEpj6mWPBKpnSXgHt/T14PnsOcNOHFBn5beARwV3Gmh ju6Q== X-Gm-Message-State: AAQBX9eMSMXebzLsKroLk1zXbRgzyhEF937vTiSVX13XrTNbq+tpG8lg ZYbzLYID9ZT5uv3CS2Ose62+bg== X-Google-Smtp-Source: AKy350YlfZmZpNnPnV6Iq90clj/A8BJ+/sxfIqXEir4DkCOjvoGFmF0jBJL539yFyqBPnkpL+k7Ovg== X-Received: by 2002:a0d:e213:0:b0:541:8735:1723 with SMTP id l19-20020a0de213000000b0054187351723mr29229838ywe.32.1680300760876; Fri, 31 Mar 2023 15:12:40 -0700 (PDT) Received: from localhost ([2620:0:1035:15:a8f6:869a:3ef5:e1d]) by smtp.gmail.com with UTF8SMTPSA id 79-20020a811452000000b00545a081848csm791793ywu.28.2023.03.31.15.12.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Mar 2023 15:12:40 -0700 (PDT) From: Mark Yacoub X-Google-Original-From: Mark Yacoub To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter Cc: seanpaul@chromium.org, suraj.kandpal@intel.com, dianders@chromium.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Stephen Boyd , Mark Yacoub , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v8 10/10] drm/msm: Implement HDCP 1.x using the new drm HDCP helpers Date: Fri, 31 Mar 2023 18:12:12 -0400 Message-Id: <20230331221213.1691997-11-markyacoub@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog In-Reply-To: <20230331221213.1691997-1-markyacoub@google.com> References: <20230331221213.1691997-1-markyacoub@google.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Sean Paul Add HDCP 1.x support to msm DP bridges using the new HDCP helpers. Cc: Stephen Boyd Reviewed-by: Stephen Boyd Signed-off-by: Sean Paul Signed-off-by: Mark Yacoub --- Changes in v2: -Squash [1] into this patch with the following changes (Stephen) -Update the sc7180 dtsi file -Remove resource names and just use index (Stephen) Changes in v3: -Split out the dtsi change from v2 (Stephen) -Fix set-but-unused warning identified by 0-day -Fix up a couple of style nits (Stephen) -Store HDCP key directly in dp_hdcp struct (Stephen) -Remove wmb in HDCP key initialization, move an_seed (Stephen) -Use FIELD_PREP for bstatus/bcaps (Stephen) -#define read_poll_timeout values (Stephen) -Remove unnecessary parentheses in dp_hdcp_store_ksv_fifo (Stephen) -Add compatible string for hdcp (Stephen) -Rename dp_hdcp_write_* functions (Abhinav) -Add 1us delay between An reads (Abhinav) -Delete unused dp_hdcp_read_* functions Changes in v4: -Rebase on Bjorn's multi-dp patchset Changes in v5: -Change return check of drm_hdcp_helper_initialize_dp() (Stephen) Changes in v6: -Change the tracking of the state from connector state to bridge as state as drm_connector_state is no longer tracked and the functionality has moved to msm_dp_bridge Changes in v7: -Use dp bridge to maintain the state with no use for connector Changes in v8: -Move the hdcp read/write to dp_catalog drivers/gpu/drm/msm/Kconfig | 1 + drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/dp/dp_catalog.c | 156 +++++++++++ drivers/gpu/drm/msm/dp/dp_catalog.h | 18 ++ drivers/gpu/drm/msm/dp/dp_debug.c | 46 +++- drivers/gpu/drm/msm/dp/dp_debug.h | 11 +- drivers/gpu/drm/msm/dp/dp_display.c | 39 ++- drivers/gpu/drm/msm/dp/dp_display.h | 5 + drivers/gpu/drm/msm/dp/dp_drm.c | 39 ++- drivers/gpu/drm/msm/dp/dp_drm.h | 7 + drivers/gpu/drm/msm/dp/dp_hdcp.c | 397 ++++++++++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_hdcp.h | 33 +++ drivers/gpu/drm/msm/dp/dp_parser.c | 14 + drivers/gpu/drm/msm/dp/dp_parser.h | 4 + drivers/gpu/drm/msm/dp/dp_reg.h | 30 ++- drivers/gpu/drm/msm/msm_atomic.c | 19 ++ 16 files changed, 808 insertions(+), 12 deletions(-) create mode 100644 drivers/gpu/drm/msm/dp/dp_hdcp.c create mode 100644 drivers/gpu/drm/msm/dp/dp_hdcp.h diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig index 4d8fddbdcd9e0..1c369ca2ea6e3 100644 --- a/drivers/gpu/drm/msm/Kconfig +++ b/drivers/gpu/drm/msm/Kconfig @@ -15,6 +15,7 @@ config DRM_MSM select REGULATOR select DRM_DP_AUX_BUS select DRM_DISPLAY_DP_HELPER + select DRM_DISPLAY_HDCP_HELPER select DRM_DISPLAY_HELPER select DRM_KMS_HELPER select DRM_PANEL diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 7274c41228ed9..a73e7b858af27 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -122,6 +122,7 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \ dp/dp_ctrl.o \ dp/dp_display.o \ dp/dp_drm.o \ + dp/dp_hdcp.o \ dp/dp_hpd.o \ dp/dp_link.o \ dp/dp_panel.o \ diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 676279d0ca8d9..a1395e0c67d56 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -16,6 +16,8 @@ #include "dp_catalog.h" #include "dp_reg.h" +#include + #define POLLING_SLEEP_US 1000 #define POLLING_TIMEOUT_US 10000 @@ -47,6 +49,14 @@ #define DP_INTERRUPT_STATUS2_MASK \ (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) +#define DP_AN_READ_DELAY_US 1 +/* Key offsets based on hdcp_key mmio */ +#define DP_HDCP_KEY_BASE 0x30 +#define DP_HDCP_KEY_MSB(x) (DP_HDCP_KEY_BASE + (x * 8)) +#define DP_HDCP_KEY_LSB(x) (DP_HDCP_KEY_MSB(x) + 4) +#define DP_HDCP_KEY_VALID 0x170 +#define DP_HDCP_SW_KEY_VALID BIT(0) + struct dp_catalog_private { struct device *dev; struct drm_device *drm_dev; @@ -133,6 +143,18 @@ static inline void dp_write_link(struct dp_catalog_private *catalog, writel(data, catalog->io->dp_controller.link.base + offset); } +static inline void dp_write_hdcp_key(struct dp_catalog_private *catalog, + u32 offset, u32 val) +{ + writel(val, catalog->io->dp_controller.hdcp_key.base + offset); +} + +static inline void dp_write_hdcp_tz(struct dp_catalog_private *catalog, + u32 offset, u32 val) +{ + writel(val, catalog->io->dp_controller.hdcp_tz.base + offset); +} + /* aux related catalog functions */ u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog) { @@ -1094,3 +1116,137 @@ void dp_catalog_audio_sfe_level(struct dp_catalog *dp_catalog) dp_write_link(catalog, REG_DP_MAINLINK_LEVELS, mainlink_levels); } + +u32 dp_catalog_hdcp_read_ahb(struct dp_catalog *dp_catalog, u32 offset) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + return dp_read_ahb(catalog, offset); +} + +void dp_catalog_hdcp_write_ahb(struct dp_catalog *dp_catalog, u32 offset, + u32 val) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + dp_write_ahb(catalog, offset, val); +} + +void dp_catalog_hdcp_disable_hdcp1(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + u32 val = dp_read_ahb(catalog, REG_DP_SW_RESET); + dp_write_ahb(catalog, REG_DP_SW_RESET, val | DP_HDCP_SW_RESET); + + /* Disable encryption and disable the HDCP block */ + dp_write_ahb(catalog, DP_HDCP_CTRL, 0); + dp_write_ahb(catalog, REG_DP_SW_RESET, val); +} + +void dp_catalog_hdcp_read_aksv(struct dp_catalog *dp_catalog, u32 *aksv) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + aksv[0] = dp_read_aux(catalog, DP_HDCP_RCVPORT_DATA3); + aksv[1] = GENMASK(7, 0) & dp_read_aux(catalog, DP_HDCP_RCVPORT_DATA4); +} + +void dp_catalog_hdcp_write_aksv(struct dp_catalog *dp_catalog, u32 *aksv) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + dp_write_aux(catalog, DP_HDCP_SW_LOWER_AKSV, aksv[0]); + dp_write_aux(catalog, DP_HDCP_SW_UPPER_AKSV, aksv[1]); +} + +void dp_catalog_hdcp_read_an(struct dp_catalog *dp_catalog, u32 *an) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + /* + * Get An from hardware, for unknown reasons we need to read the reg + * twice to get valid data. + */ + dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA5); + an[0] = dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA5); + + udelay(DP_AN_READ_DELAY_US); + + dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA6); + an[1] = dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA6); +} + +void dp_catalog_hdcp_clear_a_info(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + dp_write_ahb(catalog, DP_HDCP_RCVPORT_DATA4, 0); +} + +void dp_catalog_hdcp_write_key_words(struct dp_catalog *dp_catalog, + int key_offset, u32 *words) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + dp_write_hdcp_key(catalog, DP_HDCP_KEY_LSB(key_offset), words[0]); + dp_write_hdcp_key(catalog, DP_HDCP_KEY_MSB(key_offset), words[1]); +} + +void dp_catalog_hdcp_post_write_key(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + u64 an_seed = get_random_u64(); + + dp_write_hdcp_key(catalog, DP_HDCP_KEY_VALID, DP_HDCP_SW_KEY_VALID); + + dp_write_link(catalog, DP_HDCP_ENTROPY_CTRL0, + FIELD_GET(GENMASK(31, 0), an_seed)); + dp_write_link(catalog, DP_HDCP_ENTROPY_CTRL1, + FIELD_GET(GENMASK_ULL(63, 32), an_seed)); +} + +void dp_catalog_hdcp_hdcp1_store_receiver_info(struct dp_catalog *dp_catalog, + u32 *ksv, u32 status, u8 bcaps) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + u32 val; + + dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0, + ksv[0]); + dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1, + ksv[1]); + + val = FIELD_PREP(GENMASK(23, 8), status) | + FIELD_PREP(GENMASK(7, 0), bcaps); + + dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12, + val); +} + +void dp_catalog_hdcp_reset_sha_comp_block(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, + DP_HDCP_SHA_CTRL_RESET); + dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, 0); +} + +void dp_catalog_hdcp_write_tz(struct dp_catalog *dp_catalog, u32 offset, + u32 val) +{ + struct dp_catalog_private *catalog = + container_of(dp_catalog, struct dp_catalog_private, dp_catalog); + + dp_write_hdcp_tz(catalog, offset, val); +} diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 1f717f45c1158..565dbe3d802e3 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -135,4 +135,22 @@ void dp_catalog_audio_config_sdp(struct dp_catalog *catalog); void dp_catalog_audio_init(struct dp_catalog *catalog); void dp_catalog_audio_sfe_level(struct dp_catalog *catalog); +/* HDCP APIs */ +u32 dp_catalog_hdcp_read_ahb(struct dp_catalog *dp_catalog, u32 offset); +void dp_catalog_hdcp_write_ahb(struct dp_catalog *dp_catalog, u32 offset, + u32 val); +void dp_catalog_hdcp_disable_hdcp1(struct dp_catalog *dp_catalog); +void dp_catalog_hdcp_read_aksv(struct dp_catalog *dp_catalog, u32 *aksv); +void dp_catalog_hdcp_write_aksv(struct dp_catalog *dp_catalog, u32 *aksv); +void dp_catalog_hdcp_read_an(struct dp_catalog *dp_catalog, u32 *an); +void dp_catalog_hdcp_clear_a_info(struct dp_catalog *dp_catalog); +void dp_catalog_hdcp_write_key_words(struct dp_catalog *dp_catalog, + int key_offset, u32 *words); +void dp_catalog_hdcp_post_write_key(struct dp_catalog *dp_catalog); +void dp_catalog_hdcp_hdcp1_store_receiver_info(struct dp_catalog *dp_catalog, + u32 *ksv, u32 status, u8 bcaps); +void dp_catalog_hdcp_reset_sha_comp_block(struct dp_catalog *dp_catalog); +void dp_catalog_hdcp_write_tz(struct dp_catalog *dp_catalog, u32 offset, + u32 val); + #endif /* _DP_CATALOG_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index 5e35033ba3e43..bfef65b0c0f92 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -8,6 +8,7 @@ #include #include #include +#include #include "dp_parser.h" #include "dp_catalog.h" @@ -15,6 +16,7 @@ #include "dp_ctrl.h" #include "dp_debug.h" #include "dp_display.h" +#include "dp_hdcp.h" #define DEBUG_NAME "msm_dp" @@ -25,6 +27,7 @@ struct dp_debug_private { struct dp_link *link; struct dp_panel *panel; struct drm_connector *connector; + struct dp_hdcp *hdcp; struct device *dev; struct drm_device *drm_dev; @@ -196,6 +199,35 @@ static int dp_test_active_open(struct inode *inode, inode->i_private); } +static ssize_t dp_hdcp_key_write(struct file *file, const char __user *ubuf, + size_t len, loff_t *offp) +{ + char *input_buffer; + int ret; + struct dp_debug_private *debug = file->private_data; + + if (len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) + return -EINVAL; + + if (!debug->hdcp) + return -ENOENT; + + input_buffer = memdup_user_nul(ubuf, len); + if (IS_ERR(input_buffer)) + return PTR_ERR(input_buffer); + + ret = dp_hdcp_ingest_key(debug->hdcp, input_buffer, len); + + kfree(input_buffer); + if (ret < 0) { + DRM_ERROR("Could not ingest HDCP key, ret=%d\n", ret); + return ret; + } + + *offp += len; + return len; +} + static const struct file_operations test_active_fops = { .owner = THIS_MODULE, .open = dp_test_active_open, @@ -205,6 +237,12 @@ static const struct file_operations test_active_fops = { .write = dp_test_active_write }; +static const struct file_operations dp_hdcp_key_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = dp_hdcp_key_write, +}; + static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) { char path[64]; @@ -229,11 +267,14 @@ static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) debugfs_create_file("msm_dp_test_type", 0444, debug->root, debug, &dp_test_type_fops); + + debugfs_create_file("msm_dp_hdcp_key", 0222, minor->debugfs_root, debug, + &dp_hdcp_key_fops); } struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, - struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector *connector, struct drm_minor *minor) + struct dp_usbpd *usbpd, struct dp_link *link, struct dp_hdcp *hdcp, + struct drm_connector *connector, struct drm_minor *minor) { struct dp_debug_private *debug; struct dp_debug *dp_debug; @@ -255,6 +296,7 @@ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, debug->usbpd = usbpd; debug->link = link; debug->panel = panel; + debug->hdcp = hdcp; debug->dev = dev; debug->drm_dev = minor->dev; debug->connector = connector; diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h index 8c0d0b5178fdf..ab6c5e8e5ea63 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.h +++ b/drivers/gpu/drm/msm/dp/dp_debug.h @@ -6,6 +6,7 @@ #ifndef _DP_DEBUG_H_ #define _DP_DEBUG_H_ +#include "dp_hdcp.h" #include "dp_panel.h" #include "dp_link.h" @@ -34,6 +35,7 @@ struct dp_debug { * @panel: instance of panel module * @usbpd: instance of usbpd module * @link: instance of link module + * @hdcp: instance of hdcp module * @connector: double pointer to display connector * @minor: pointer to drm minor number after device registration * return: pointer to allocated debug module data @@ -42,9 +44,10 @@ struct dp_debug { * for debugfs input to be communicated with existing modules */ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, - struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector *connector, - struct drm_minor *minor); + struct dp_usbpd *usbpd, struct dp_link *link, + struct dp_hdcp *hdcp, + struct drm_connector *connector, + struct drm_minor *minor); /** * dp_debug_put() @@ -59,7 +62,7 @@ void dp_debug_put(struct dp_debug *dp_debug); static inline struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, - struct dp_usbpd *usbpd, struct dp_link *link, + struct dp_usbpd *usbpd, struct dp_link *link, struct dp_hdcp *hdcp, struct drm_connector *connector, struct drm_minor *minor) { return ERR_PTR(-EINVAL); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index bde1a7ce442ff..7c90d7cefedbc 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -27,6 +27,7 @@ #include "dp_drm.h" #include "dp_audio.h" #include "dp_debug.h" +#include "dp_hdcp.h" #define HPD_STRING_SIZE 30 @@ -97,6 +98,7 @@ struct dp_display_private { struct dp_panel *panel; struct dp_ctrl *ctrl; struct dp_debug *debug; + struct dp_hdcp *hdcp; struct dp_usbpd_cb usbpd_cb; struct dp_display_mode dp_mode; @@ -190,6 +192,14 @@ static struct dp_display_private *dev_get_dp_display_private(struct device *dev) return container_of(dp, struct dp_display_private, dp_display); } +struct dp_hdcp *dp_display_bridge_to_hdcp(struct drm_bridge *bridge) +{ + struct msm_dp *dp_display = msm_dp_from_bridge(bridge); + struct dp_display_private *dp = + container_of(dp_display, struct dp_display_private, dp_display); + return dp->hdcp; +} + static int dp_add_event(struct dp_display_private *dp_priv, u32 event, u32 data, u32 delay) { @@ -752,6 +762,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) static void dp_display_deinit_sub_modules(struct dp_display_private *dp) { dp_debug_put(dp->debug); + dp_hdcp_put(dp->hdcp); dp_audio_put(dp->audio); dp_panel_put(dp->panel); dp_aux_put(dp->aux); @@ -852,8 +863,18 @@ static int dp_init_sub_modules(struct dp_display_private *dp) dp->ctrl->wide_bus_en = dp->wide_bus_en; dp->catalog->wide_bus_en = dp->wide_bus_en; + dp->hdcp = dp_hdcp_get(dp->parser, dp->aux); + if (IS_ERR(dp->hdcp)) { + rc = PTR_ERR(dp->hdcp); + DRM_ERROR("failed to initialize hdcp, rc = %d\n", rc); + dp->hdcp = NULL; + goto error_hdcp; + } + return rc; +error_hdcp: + dp_audio_put(dp->audio); error_ctrl: dp_panel_put(dp->panel); error_link: @@ -965,6 +986,15 @@ int dp_display_set_plugged_cb(struct msm_dp *dp_display, return 0; } +void dp_display_hdcp_commit(struct msm_dp *dp, struct drm_atomic_state *state) +{ + struct dp_display_private *dp_display = + container_of(dp, struct dp_display_private, dp_display); + + if (dp_display->hdcp) + dp_hdcp_commit(dp_display->hdcp, state); +} + /** * dp_bridge_mode_valid - callback to determine if specified mode is valid * @bridge: Pointer to drm bridge structure @@ -1528,7 +1558,7 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) dev = &dp->pdev->dev; dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd, - dp->link, dp->dp_display.connector, + dp->link, dp->hdcp, dp->dp_display.connector, minor); if (IS_ERR(dp->debug)) { rc = PTR_ERR(dp->debug); @@ -1649,6 +1679,13 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, dp_priv->panel->connector = dp_display->connector; + ret = dp_hdcp_attach(dp_priv->hdcp, dp_display->connector, + dp_display->bridge, dp_priv->catalog); + if (ret) { + DRM_ERROR("Failed to attach hdcp, ret=%d\n", ret); + return ret; + } + return 0; } diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index 371337d0fae26..1d64b86b0b354 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -31,8 +31,13 @@ struct msm_dp { struct dp_audio *dp_audio; }; +struct drm_atomic_state; + int dp_display_set_plugged_cb(struct msm_dp *dp_display, hdmi_codec_plugged_cb fn, struct device *codec_dev); +struct dp_hdcp *dp_display_bridge_to_hdcp(struct drm_bridge *bridge); +void dp_display_hdcp_commit(struct msm_dp *dp_display, + struct drm_atomic_state *state); int dp_display_get_modes(struct msm_dp *dp_display); int dp_display_request_irq(struct msm_dp *dp_display); bool dp_display_check_video_test(struct msm_dp *dp_display); diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c index 275370f211159..6bf3b224ccaef 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -7,11 +7,19 @@ #include #include #include +#include #include +#include #include "msm_drv.h" #include "msm_kms.h" #include "dp_drm.h" +#include "dp_hdcp.h" + +struct msm_dp *msm_dp_from_bridge(struct drm_bridge *bridge) +{ + return to_dp_bridge(bridge)->dp_display; +} /** * dp_bridge_detect - callback to determine if connector is connected @@ -37,8 +45,8 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge, struct drm_connector_state *conn_state) { struct msm_dp *dp; - - dp = to_dp_bridge(bridge)->dp_display; + struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge); + dp = dp_bridge->dp_display; drm_dbg_dp(dp->drm_dev, "is_connected = %s\n", (dp->is_connected) ? "true" : "false"); @@ -54,8 +62,11 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge, * disabled by the hardware and thus all access to it should be forbidden. * After that this piece of code can be removed. */ - if (bridge->ops & DRM_BRIDGE_OP_HPD) - return (dp->is_connected) ? 0 : -ENOTCONN; + if (bridge->ops & DRM_BRIDGE_OP_HPD && !dp->is_connected) + return -ENOTCONN; + + dp_bridge->hdcp_transition = + drm_hdcp_has_changed(conn_state->connector, conn_state->state); return 0; } @@ -107,6 +118,25 @@ static const struct drm_bridge_funcs dp_bridge_ops = { .hpd_notify = dp_bridge_hpd_notify, }; +bool dp_drm_is_bridge_msm_dp(struct drm_bridge *bridge) +{ + return bridge->funcs == &dp_bridge_ops; +} + +void dp_drm_atomic_commit(struct drm_bridge *bridge, + struct drm_atomic_state *state) +{ + struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge); + struct msm_dp *dp_disp; + + if (!dp_bridge->hdcp_transition) + return; + + dp_disp = msm_dp_from_bridge(bridge); + + dp_display_hdcp_commit(dp_disp, state); +} + struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder) { @@ -119,6 +149,7 @@ struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device * return ERR_PTR(-ENOMEM); dp_bridge->dp_display = dp_display; + dp_bridge->hdcp_transition = false; bridge = &dp_bridge->bridge; bridge->funcs = &dp_bridge_ops; diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h index 250f7c66201f2..9b3f81cf2e139 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.h +++ b/drivers/gpu/drm/msm/dp/dp_drm.h @@ -15,11 +15,18 @@ struct msm_dp_bridge { struct drm_bridge bridge; struct msm_dp *dp_display; + bool hdcp_transition; }; #define to_dp_bridge(x) container_of((x), struct msm_dp_bridge, bridge) +struct msm_dp *msm_dp_from_bridge(struct drm_bridge *bridge); + struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display, struct drm_encoder *encoder); +bool dp_drm_is_bridge_msm_dp(struct drm_bridge *bridge); +void dp_drm_atomic_commit(struct drm_bridge *bridge, + struct drm_atomic_state *state); + struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder); diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.c b/drivers/gpu/drm/msm/dp/dp_hdcp.c new file mode 100644 index 0000000000000..05e7c24fda756 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c @@ -0,0 +1,397 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2023 Google, Inc. + * + * Authors: + * Sean Paul + */ + +#include "dp_display.h" +#include "dp_drm.h" +#include "dp_hdcp.h" +#include "dp_reg.h" + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +/* Timeouts */ +#define DP_KEYS_VALID_SLEEP_US (20 * 1000) +#define DP_KEYS_VALID_TIMEOUT_US (100 * 1000) +#define DP_AN_READY_SLEEP_US 100 +#define DP_AN_READY_TIMEOUT_US (10 * 1000) +#define DP_R0_READY_SLEEP_US 100 +#define DP_R0_READY_TIMEOUT_US (10 * 1000) +#define DP_RI_MATCH_SLEEP_US (20 * 1000) +#define DP_RI_MATCH_TIMEOUT_US (100 * 1000) +#define DP_KSV_WRITTEN_SLEEP_US 100 +#define DP_KSV_WRITTEN_TIMEOUT_US (100 * 1000) +#define DP_SHA_COMPUTATION_SLEEP_US 100 +#define DP_SHA_COMPUTATION_TIMEOUT_US (100 * 1000) + +/* + * dp_hdcp_key - structure which contains an HDCP key set + * @ksv: The key selection vector + * @keys: Contains 40 keys + */ +struct dp_hdcp_key { + struct drm_hdcp_ksv ksv; + union { + u32 words[2]; + u8 bytes[DP_HDCP_KEY_LEN]; + } keys[DP_HDCP_NUM_KEYS]; + bool valid; +}; + +struct dp_hdcp { + struct drm_device *dev; + struct drm_connector *connector; + + struct drm_dp_aux *aux; + struct dp_parser *parser; + + struct drm_hdcp_helper_data *helper_data; + + struct mutex key_lock; + struct dp_hdcp_key key; + + struct dp_catalog *catalog; +}; + +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len) +{ + unsigned int ksv_weight; + int i, ret = 0; + int expected_len = + DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN; + + if (raw_len != expected_len) { + DRM_ERROR("Invalid HDCP key length expected=%d actual=%d\n", + expected_len, raw_len); + return -EINVAL; + } + + mutex_lock(&hdcp->key_lock); + + memcpy(hdcp->key.ksv.bytes, raw_key, DRM_HDCP_KSV_LEN); + ksv_weight = hweight32(hdcp->key.ksv.words[0]) + + hweight32(hdcp->key.ksv.words[1]); + if (ksv_weight != 20) { + DRM_ERROR("Invalid ksv weight, expected=20 actual=%d\n", + ksv_weight); + ret = -EINVAL; + goto out; + } + + raw_key += DRM_HDCP_KSV_LEN; + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { + memcpy(hdcp->key.keys[i].bytes, raw_key, DP_HDCP_KEY_LEN); + raw_key += DP_HDCP_KEY_LEN; + } + + DRM_DEBUG_DRIVER("Successfully ingested HDCP key\n"); + hdcp->key.valid = true; + +out: + mutex_unlock(&hdcp->key_lock); + return ret; +} + +static bool dp_hdcp_are_keys_valid(struct drm_connector *connector, + void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + u32 val; + + val = dp_catalog_hdcp_read_ahb(hdcp->catalog, DP_HDCP_STATUS); + return FIELD_GET(DP_HDCP_KEY_STATUS, val) == DP_HDCP_KEY_STATUS_VALID; +} + +static int dp_hdcp_load_keys(struct drm_connector *connector, void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + int i, ret = 0; + + mutex_lock(&hdcp->key_lock); + + if (!hdcp->key.valid) { + ret = -ENOENT; + goto out; + } + + dp_catalog_hdcp_write_aksv(hdcp->catalog, hdcp->key.ksv.words); + + + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { + dp_catalog_hdcp_write_key_words(hdcp->catalog, i, + hdcp->key.keys[i].words); + } + dp_catalog_hdcp_post_write_key(hdcp->catalog); + +out: + mutex_unlock(&hdcp->key_lock); + return ret; +} + +static int dp_hdcp_hdcp2_capable(struct drm_connector *connector, bool *capable, + void *driver_data) +{ + *capable = false; + return 0; +} + +static int dp_hdcp_hdcp1_read_an_aksv(struct drm_connector *connector, u32 *an, + u32 *aksv, void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + bool keys_valid; + int ret; + u32 val; + + dp_catalog_hdcp_write_ahb(hdcp->catalog, DP_HDCP_CTRL, 1); + + ret = read_poll_timeout(dp_hdcp_are_keys_valid, keys_valid, keys_valid, + DP_KEYS_VALID_SLEEP_US, + DP_KEYS_VALID_TIMEOUT_US, false, connector, + driver_data); + if (ret) { + drm_err(hdcp->dev, "HDCP keys invalid %d\n", ret); + return ret; + } + + /* Clear AInfo */ + dp_catalog_hdcp_clear_a_info(hdcp->catalog); + + dp_catalog_hdcp_read_aksv(hdcp->catalog, aksv); + + ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val, + (val & DP_HDCP_AN_READY_MASK) == + DP_HDCP_AN_READY_MASK, + DP_AN_READY_SLEEP_US, DP_AN_READY_TIMEOUT_US, + false, hdcp->catalog, DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, "AN failed to become ready %x/%d\n", val, + ret); + return ret; + } + + dp_catalog_hdcp_read_an(hdcp->catalog, an); + + return 0; +} + +static int dp_hdcp_hdcp1_store_receiver_info(struct drm_connector *connector, + u32 *ksv, u32 status, u8 bcaps, + bool is_repeater, + void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + + dp_catalog_hdcp_hdcp1_store_receiver_info(hdcp->catalog, ksv, status, + bcaps); + + return 0; +} + +static int dp_hdcp_hdcp1_enable_encryption(struct drm_connector *connector, + void *driver_data) +{ + /* + * On Qcom hardware, there is nothing explicit about enabling encryption + * like it is the case in other drivers. It gets enabled by default. + */ + return 0; +} + +static int dp_hdcp_hdcp1_wait_for_r0(struct drm_connector *connector, + void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + int ret; + u32 val; + + ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val, + (val & DP_HDCP_R0_READY), DP_R0_READY_SLEEP_US, + DP_R0_READY_TIMEOUT_US, false, hdcp->catalog, + DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, "HDCP R0 not ready %x/%d\n", val, ret); + return ret; + } + + return 0; +} + +static int dp_hdcp_hdcp1_match_ri(struct drm_connector *connector, u32 ri_prime, + void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + int ret; + u32 val; + + dp_catalog_hdcp_write_ahb(hdcp->catalog, DP_HDCP_RCVPORT_DATA2_0, + ri_prime); + + ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val, + (val & DP_HDCP_RI_MATCH), DP_RI_MATCH_SLEEP_US, + DP_RI_MATCH_TIMEOUT_US, false, hdcp->catalog, + DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, + "Failed to match Ri and Ri` (%08x) %08x/%d\n", ri_prime, + val, ret); + return ret; + } + return 0; +} + +static int dp_hdcp_hdcp1_store_ksv_fifo(struct drm_connector *connector, + u8 *ksv_fifo, u8 num_downstream, + u8 *bstatus, u32 *vprime, + void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + int num_bytes = num_downstream * DRM_HDCP_KSV_LEN; + int ret, i; + u32 val; + + dp_catalog_hdcp_reset_sha_comp_block(hdcp->catalog); + + /* + * KSV info gets written a byte at a time in the same order it was + * received. Every 64 bytes, we need to wait for the SHA_BLOCK_DONE + * bit to be set in SHA_CTRL. + */ + for (i = 0; i < num_bytes; i++) { + val = FIELD_PREP(DP_HDCP_SHA_DATA_MASK, ksv_fifo[i]); + + if (i == (num_bytes - 1)) + val |= DP_HDCP_SHA_DATA_DONE; + + dp_catalog_hdcp_write_tz(hdcp->catalog, + HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA, + val); + + if ((i + 1) % 64 != 0) + continue; + + ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val, + (val & DP_HDCP_SHA_DONE), + DP_KSV_WRITTEN_SLEEP_US, + DP_KSV_WRITTEN_TIMEOUT_US, false, + hdcp->catalog, DP_HDCP_SHA_STATUS); + if (ret) { + drm_err(hdcp->dev, "SHA block incomplete %d\n", ret); + return ret; + } + } + + ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val, + (val & DP_HDCP_SHA_COMP_DONE), + DP_SHA_COMPUTATION_SLEEP_US, + DP_SHA_COMPUTATION_TIMEOUT_US, false, + hdcp->catalog, DP_HDCP_SHA_STATUS); + if (ret) { + drm_err(hdcp->dev, "SHA computation incomplete %d\n", ret); + return ret; + } + + return 0; +} + +static int dp_hdcp_hdcp1_disable(struct drm_connector *connector, + void *driver_data) +{ + struct drm_bridge *bridge = (struct drm_bridge *)driver_data; + struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge); + dp_catalog_hdcp_disable_hdcp1(hdcp->catalog); + return 0; +} + +void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state) +{ + drm_hdcp_helper_atomic_commit(hdcp->helper_data, state, NULL); +} + +static const struct drm_hdcp_helper_funcs dp_hdcp_funcs = { + .are_keys_valid = dp_hdcp_are_keys_valid, + .load_keys = dp_hdcp_load_keys, + .hdcp2_capable = dp_hdcp_hdcp2_capable, + .hdcp1_read_an_aksv = dp_hdcp_hdcp1_read_an_aksv, + .hdcp1_store_receiver_info = dp_hdcp_hdcp1_store_receiver_info, + .hdcp1_enable_encryption = dp_hdcp_hdcp1_enable_encryption, + .hdcp1_wait_for_r0 = dp_hdcp_hdcp1_wait_for_r0, + .hdcp1_match_ri = dp_hdcp_hdcp1_match_ri, + .hdcp1_store_ksv_fifo = dp_hdcp_hdcp1_store_ksv_fifo, + .hdcp1_disable = dp_hdcp_hdcp1_disable, + /* Common DRM functions that are different between DP vs HDMI*/ + .remote_read = drm_hdcp_remote_dpcd_read, + .remote_write = drm_hdcp_remote_dpcd_write, + .hdcp1_capable = drm_hdcp_helper_hdcp1_capable_dp, + .hdcp1_ksv_fifo_ready = drm_hdcp_helper_hdcp1_ksv_fifo_ready_dp, + .wait_r0 = drm_hdcp_helper_wait_r0_dp, + .hdcp1_check_link_registers = drm_hdcp_hdcp1_check_link_registers_dp, + .hdcp1_read_ksv_fifo = drm_hdcp_helper_hdcp1_read_ksv_fifo_dp +}; + +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector, + struct drm_bridge *bridge, struct dp_catalog *catalog) +{ + struct drm_hdcp_helper_data *helper_data; + + /* HDCP is not configured for this device */ + if (!hdcp->parser->io.dp_controller.hdcp_key.base) + return 0; + + helper_data = drm_hdcp_helper_initialize_dp(connector, hdcp->aux, + &dp_hdcp_funcs, false); + if (IS_ERR(helper_data)) + return PTR_ERR(helper_data); + + helper_data->driver_data = bridge; + hdcp->dev = connector->dev; + hdcp->connector = connector; + hdcp->helper_data = helper_data; + hdcp->catalog = catalog; + + return 0; +} + +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux) +{ + struct device *dev = &parser->pdev->dev; + struct dp_hdcp *hdcp; + + hdcp = devm_kzalloc(dev, sizeof(*hdcp), GFP_KERNEL); + if (!hdcp) + return ERR_PTR(-ENOMEM); + + hdcp->parser = parser; + hdcp->aux = aux; + + mutex_init(&hdcp->key_lock); + + return hdcp; +} + +void dp_hdcp_put(struct dp_hdcp *hdcp) +{ + if (hdcp) + drm_hdcp_helper_destroy(hdcp->helper_data); +} diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.h b/drivers/gpu/drm/msm/dp/dp_hdcp.h new file mode 100644 index 0000000000000..4586e45d14d26 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.h @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2021 Google, Inc. + * + * Authors: + * Sean Paul + */ + +#ifndef DP_HDCP_H_ +#define DP_HDCP_H_ + +#include +#include + +#include "dp_catalog.h" + +#define DP_HDCP_KEY_LEN 7 +#define DP_HDCP_NUM_KEYS 40 + +struct dp_hdcp; +struct dp_parser; +struct drm_atomic_state; +struct drm_dp_aux; + +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux); +void dp_hdcp_put(struct dp_hdcp *hdcp); + +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector, + struct drm_bridge *bridgem, struct dp_catalog *catalog); +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len); +void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state); + +#endif /* _DP_HDCP_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index 7032dcc8842b3..1f9bb001aebc3 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -39,6 +39,8 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) struct platform_device *pdev = parser->pdev; struct dp_io *io = &parser->io; struct dss_io_data *dss = &io->dp_controller; + void __iomem *dss_hdcp_key; + size_t dss_hdcp_key_len; dss->ahb.base = dp_ioremap(pdev, 0, &dss->ahb.len); if (IS_ERR(dss->ahb.base)) @@ -84,6 +86,18 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) } } + dss_hdcp_key = dp_ioremap(pdev, 5, &dss_hdcp_key_len); + if (!IS_ERR(dss_hdcp_key)) { + dss->hdcp_key.base = dss_hdcp_key; + dss->hdcp_key.len = dss_hdcp_key_len; + dss->hdcp_tz.base = dp_ioremap(pdev, 6, &dss->hdcp_tz.len); + if (IS_ERR(dss->hdcp_tz.base)) { + DRM_ERROR("unable to remap hdcp_tz region: %pe\n", + dss->hdcp_tz.base); + return PTR_ERR(dss->hdcp_tz.base); + } + } + io->phy = devm_phy_get(&pdev->dev, "dp"); if (IS_ERR(io->phy)) return PTR_ERR(io->phy); diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 1f068626d445e..8b5dd3deb85ff 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -35,6 +35,8 @@ struct dss_io_data { struct dss_io_region aux; struct dss_io_region link; struct dss_io_region p0; + struct dss_io_region hdcp_key; + struct dss_io_region hdcp_tz; }; static inline const char *dp_parser_pm_name(enum dp_pm_type module) @@ -69,6 +71,8 @@ struct dp_display_data { * struct dp_ctrl_resource - controller's IO related data * * @dp_controller: Display Port controller mapped memory address + * @hdcp_key: mapped memory for HDCP key ingestion + * @hdcp_tz: mapped memory for HDCP TZ interaction * @phy_io: phy's mapped memory address */ struct dp_io { diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 268602803d9a3..d2ac60ce7ae50 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -10,7 +10,8 @@ #define REG_DP_HW_VERSION (0x00000000) #define REG_DP_SW_RESET (0x00000010) -#define DP_SW_RESET (0x00000001) +#define DP_SW_RESET BIT(0) +#define DP_HDCP_SW_RESET BIT(1) #define REG_DP_PHY_CTRL (0x00000014) #define DP_PHY_CTRL_SW_RESET_PLL (0x00000001) @@ -283,19 +284,46 @@ /* DP HDCP 1.3 registers */ #define DP_HDCP_CTRL (0x0A0) #define DP_HDCP_STATUS (0x0A4) +#define DP_HDCP_KEY_STATUS GENMASK(18, 16) +#define DP_HDCP_KEY_STATUS_NO_KEYS 0 +#define DP_HDCP_KEY_STATUS_NOT_CHECKED 1 +#define DP_HDCP_KEY_STATUS_CHECKING 2 +#define DP_HDCP_KEY_STATUS_VALID 3 +#define DP_HDCP_KEY_STATUS_INVALID_AKSV 4 +#define DP_HDCP_KEY_STATUS_BAD_CHECKSUM 5 +#define DP_HDCP_KEY_STATUS_PROD_AKSV 6 +#define DP_HDCP_KEY_STATUS_RESV 7 +#define DP_HDCP_R0_READY BIT(14) +#define DP_HDCP_SHA_V_MATCH BIT(13) +#define DP_HDCP_RI_MATCH BIT(12) +#define DP_HDCP_AN_MSB_READY BIT(9) +#define DP_HDCP_AN_LSB_READY BIT(8) +#define DP_HDCP_AN_READY_MASK (DP_HDCP_AN_MSB_READY | DP_HDCP_AN_LSB_READY) +#define DP_HDCP_AUTH_FAIL_INFO GENMASK(7, 4) +#define DP_HDCP_AUTH_FAIL_INVALID_AKSV 3 +#define DP_HDCP_AUTH_FAIL_INVALID_BKSV 4 +#define DP_HDCP_AUTH_FAIL_RI_MISMATCH 5 +#define DP_HDCP_AUTH_FAIL BIT(2) +#define DP_HDCP_AUTH_SUCCESS BIT(0) #define DP_HDCP_SW_UPPER_AKSV (0x098) #define DP_HDCP_SW_LOWER_AKSV (0x09C) #define DP_HDCP_ENTROPY_CTRL0 (0x350) #define DP_HDCP_ENTROPY_CTRL1 (0x35C) #define DP_HDCP_SHA_STATUS (0x0C8) +#define DP_HDCP_SHA_COMP_DONE BIT(4) +#define DP_HDCP_SHA_DONE BIT(0) #define DP_HDCP_RCVPORT_DATA2_0 (0x0B0) #define DP_HDCP_RCVPORT_DATA3 (0x0A4) #define DP_HDCP_RCVPORT_DATA4 (0x0A8) #define DP_HDCP_RCVPORT_DATA5 (0x0C0) #define DP_HDCP_RCVPORT_DATA6 (0x0C4) +#define DP_HDCP_RCVPORT_DATA7 (0x0C8) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL (0x024) +#define DP_HDCP_SHA_CTRL_RESET BIT(0) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA (0x028) +#define DP_HDCP_SHA_DATA_MASK GENMASK(23, 16) +#define DP_HDCP_SHA_DATA_DONE BIT(0) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0 (0x004) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1 (0x008) #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA7 (0x00C) diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 1686fbb611fd7..2168188d6379c 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -5,8 +5,11 @@ */ #include +#include +#include #include +#include "dp/dp_drm.h" #include "msm_atomic_trace.h" #include "msm_drv.h" #include "msm_gem.h" @@ -179,6 +182,20 @@ static unsigned get_crtc_mask(struct drm_atomic_state *state) return mask; } +static void msm_atomic_commit_connectors(struct drm_atomic_state *state) +{ + struct drm_device *dev = state->dev; + struct msm_drm_private *priv = dev->dev_private; + int i; + + for (i = 0; i < priv->num_bridges; ++i) { + struct drm_bridge *bridge = priv->bridges[i]; + if (dp_drm_is_bridge_msm_dp(bridge)) { + dp_drm_atomic_commit(bridge, state); + } + } +} + void msm_atomic_commit_tail(struct drm_atomic_state *state) { struct drm_device *dev = state->dev; @@ -215,6 +232,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_commit_planes(dev, state, 0); drm_atomic_helper_commit_modeset_enables(dev, state); + msm_atomic_commit_connectors(state); + if (async) { struct msm_pending_timer *timer = &kms->pending_timers[drm_crtc_index(async_crtc)];