From: Sean Paul seanpaul@chromium.org
This patch adds HDCP 1.x support to msm DP connectors using the new HDCP helpers.
Signed-off-by: Sean Paul seanpaul@chromium.org --- drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/dp/dp_debug.c | 49 +++- drivers/gpu/drm/msm/dp/dp_debug.h | 6 +- drivers/gpu/drm/msm/dp/dp_display.c | 45 ++- drivers/gpu/drm/msm/dp/dp_display.h | 5 + drivers/gpu/drm/msm/dp/dp_drm.c | 68 ++++- drivers/gpu/drm/msm/dp/dp_drm.h | 5 + drivers/gpu/drm/msm/dp/dp_hdcp.c | 433 ++++++++++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_hdcp.h | 27 ++ drivers/gpu/drm/msm/dp/dp_reg.h | 44 ++- drivers/gpu/drm/msm/msm_atomic.c | 15 + 11 files changed, 685 insertions(+), 13 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/Makefile b/drivers/gpu/drm/msm/Makefile index 904535eda0c4..98731fd262d6 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -109,6 +109,7 @@ 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_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index 2f6247e80e9d..de16fca8782a 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -8,6 +8,7 @@ #include <linux/debugfs.h> #include <drm/drm_connector.h> #include <drm/drm_file.h> +#include <drm/drm_hdcp.h>
#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"
@@ -24,6 +26,7 @@ struct dp_debug_private { struct dp_usbpd *usbpd; struct dp_link *link; struct dp_panel *panel; + struct dp_hdcp *hdcp; struct drm_connector **connector; struct device *dev; struct drm_device *drm_dev; @@ -349,6 +352,38 @@ 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 = 0; + struct dp_debug_private *debug = file->private_data; + struct drm_device *dev; + + dev = debug->drm_dev; + + 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 dp_debug_fops = { .open = simple_open, .read = dp_debug_read_info, @@ -363,6 +398,12 @@ 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 int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) { int rc = 0; @@ -384,6 +425,10 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) minor->debugfs_root, debug, &dp_test_type_fops);
+ debugfs_create_file("msm_dp_hdcp_key", 0222, + minor->debugfs_root, + debug, &dp_hdcp_key_fops); + debug->root = minor->debugfs_root;
return rc; @@ -391,7 +436,8 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
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_hdcp *hdcp, struct drm_connector **connector, + struct drm_minor *minor) { int rc = 0; struct dp_debug_private *debug; @@ -413,6 +459,7 @@ 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 7eaedfbb149c..c4481339c0c5 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"
@@ -43,7 +44,7 @@ struct dp_debug { */ 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 dp_hdcp *hdcp, struct drm_connector **connector, struct drm_minor *minor);
/** @@ -60,7 +61,8 @@ 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 drm_connector **connector, struct drm_minor *minor) + 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 19946024e235..e7971263686a 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -26,6 +26,7 @@ #include "dp_drm.h" #include "dp_audio.h" #include "dp_debug.h" +#include "dp_hdcp.h"
static struct msm_dp *g_dp_display; #define HPD_STRING_SIZE 30 @@ -96,6 +97,7 @@ 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; @@ -121,6 +123,15 @@ static const struct of_device_id dp_dt_match[] = { {} };
+struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector) +{ + struct msm_dp *dp_display = msm_dp_from_connector(connector); + struct dp_display_private *dp; + + 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) { @@ -714,6 +725,7 @@ 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); @@ -810,8 +822,18 @@ static int dp_init_sub_modules(struct dp_display_private *dp) goto error_ctrl; }
+ 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: @@ -930,6 +952,15 @@ 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; + + dp_display = container_of(dp, struct dp_display_private, dp_display); + + dp_hdcp_commit(dp_display->hdcp, state); +} + int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz) { const u32 num_components = 3, default_bpp = 24; @@ -1429,8 +1460,8 @@ 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, - minor); + dp->link, dp->hdcp, + &dp->dp_display.connector, minor); if (IS_ERR(dp->debug)) { rc = PTR_ERR(dp->debug); DRM_ERROR("failed to initialize debug, rc = %d\n", rc); @@ -1441,12 +1472,16 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder) { + struct dp_display_private *dp_display_priv; struct msm_drm_private *priv; int ret;
if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev)) return -EINVAL;
+ dp_display_priv = container_of(dp_display, struct dp_display_private, + dp_display); + priv = dev->dev_private; dp_display->drm_dev = dev;
@@ -1467,6 +1502,12 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, return ret; }
+ ret = dp_hdcp_attach(dp_display_priv->hdcp, dp_display->connector); + if (ret) { + DRM_ERROR("Failed to attach hdcp, ret=%d\n", ret); + return ret; + } + priv->connectors[priv->num_connectors++] = dp_display->connector; return 0; } diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index 8b47cdabb67e..421268e47f30 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -27,8 +27,13 @@ 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_connector_to_hdcp(struct drm_connector *connector); +void dp_display_hdcp_commit(struct msm_dp *dp_display, + struct drm_atomic_state *state); int dp_display_validate_mode(struct msm_dp *dp_display, u32 mode_pclk_khz); int dp_display_get_modes(struct msm_dp *dp_display, struct dp_display_mode *dp_mode); diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c index 764f4b81017e..8e62558b4fc3 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -5,11 +5,20 @@
#include <drm/drm_atomic_helper.h> #include <drm/drm_atomic.h> +#include <drm/drm_connector.h> #include <drm/drm_crtc.h> +#include <drm/drm_hdcp.h>
#include "msm_drv.h" #include "msm_kms.h" #include "dp_drm.h" +#include "dp_hdcp.h" + +struct dp_connector_state { + struct drm_connector_state base; + bool hdcp_transition; +}; +#define to_dp_connector_state(x) container_of(x, struct dp_connector_state, base)
struct dp_connector { struct drm_connector base; @@ -17,6 +26,11 @@ struct dp_connector { }; #define to_dp_connector(x) container_of(x, struct dp_connector, base)
+struct msm_dp *msm_dp_from_connector(struct drm_connector *connector) +{ + return to_dp_connector(connector)->dp_display; +} + /** * dp_connector_detect - callback to determine if connector is connected * @conn: Pointer to drm connector structure @@ -114,20 +128,72 @@ static enum drm_mode_status dp_connector_mode_valid( return dp_display_validate_mode(dp_disp, mode->clock); }
+static int dp_connector_atomic_check(struct drm_connector *connector, + struct drm_atomic_state *state) +{ + struct drm_connector_state *conn_state; + struct dp_connector_state *dp_state; + + conn_state = drm_atomic_get_new_connector_state(state, connector); + dp_state = to_dp_connector_state(conn_state); + + dp_state->hdcp_transition = drm_hdcp_atomic_check(connector, state); + + return 0; +} + +static struct drm_connector_state * +dp_connector_atomic_duplicate_state(struct drm_connector *connector) +{ + struct dp_connector_state *state; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return NULL; + + state->hdcp_transition = false; + + __drm_atomic_helper_connector_duplicate_state(connector, &state->base); + return &state->base; +} + static const struct drm_connector_funcs dp_connector_funcs = { .detect = dp_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .reset = drm_atomic_helper_connector_reset, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_duplicate_state = dp_connector_atomic_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, };
static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { .get_modes = dp_connector_get_modes, .mode_valid = dp_connector_mode_valid, + .atomic_check = dp_connector_atomic_check, };
+bool dp_drm_is_connector_msm_dp(struct drm_connector *connector) +{ + return connector->funcs == &dp_connector_funcs; +} + +void dp_drm_atomic_commit(struct drm_connector *connector, + struct drm_connector_state *conn_state, + struct drm_atomic_state *state) +{ + struct dp_connector_state *dp_state; + struct msm_dp *dp_disp; + + dp_state = to_dp_connector_state(conn_state); + + if (!dp_state->hdcp_transition) + return; + + dp_disp = msm_dp_from_connector(connector); + + dp_display_hdcp_commit(dp_disp, state); +} + /* connector initialization */ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display) { diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h index c27bfceefdf0..a5d95c6acd67 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.h +++ b/drivers/gpu/drm/msm/dp/dp_drm.h @@ -14,5 +14,10 @@ #include "dp_display.h"
struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display); +struct msm_dp *msm_dp_from_connector(struct drm_connector *connector); +bool dp_drm_is_connector_msm_dp(struct drm_connector *connector); +void dp_drm_atomic_commit(struct drm_connector *connector, + struct drm_connector_state *conn_state, + struct drm_atomic_state *state);
#endif /* _DP_DRM_H_ */ 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 000000000000..07d2a1f04d97 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c @@ -0,0 +1,433 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2021 Google, Inc. + * + * Authors: + * Sean Paul seanpaul@chromium.org + */ + +#include "dp_display.h" +#include "dp_drm.h" +#include "dp_hdcp.h" +#include "dp_reg.h" + +#include <drm/drm_connector.h> +#include <drm/drm_device.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_hdcp.h> +#include <drm/drm_print.h> + +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/iopoll.h> +#include <linux/mutex.h> +#include <linux/random.h> +#include <linux/slab.h> + +/* Offsets based on hdcp_ksv mmio */ +#define DP_HDCP_KSV_AN_LSB 0x0 +#define DP_HDCP_KSV_AN_MSB 0x4 +#define DP_HDCP_KSV_AKSV_MSB 0x1D8 +#define DP_HDCP_KSV_AKSV_LSB 0x1DC + +/* 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) + +/* + * 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; +}; + +static inline void dp_hdcp_write_dp(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.dp_controller.base + offset); +} + +static inline u32 dp_hdcp_read_dp(struct dp_hdcp *hdcp, u32 offset) +{ + return readl(hdcp->parser->io.dp_controller.base + offset); +} + +static inline void dp_hdcp_write_hdcp(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.hdcp_key.base + offset); +} + +static inline u32 dp_hdcp_read_hdcp(struct dp_hdcp *hdcp, u32 offset) +{ + return readl(hdcp->parser->io.hdcp_key.base + offset); +} + +static inline void dp_hdcp_write_tz(struct dp_hdcp *hdcp, u32 offset, u32 val) +{ + writel(val, hdcp->parser->io.hdcp_tz.base + offset); +} + +static inline u32 dp_hdcp_read_tz(struct dp_hdcp *hdcp, u32 offset) +{ + return readl(hdcp->parser->io.hdcp_tz.base + offset); +} + +int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len) +{ + struct dp_hdcp_key *key; + const u8 *ptr = raw_key; + unsigned int ksv_weight; + int i, ret = 0; + + mutex_lock(&hdcp->key_lock); + + if (raw_len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) { + DRM_ERROR("Invalid HDCP key length expected=%d actual=%d\n", + (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN), + raw_len); + ret = -EINVAL; + goto out; + } + + key = hdcp->key; + + memcpy(key->ksv.bytes, ptr, DRM_HDCP_KSV_LEN); + ksv_weight = hweight32(key->ksv.words[0]) + hweight32(key->ksv.words[1]); + if (ksv_weight != 20) { + DRM_ERROR("Invalid ksv weight, expected=20 actual=%d\n", + ksv_weight); + ret = -EINVAL; + goto out; + } + + ptr += DRM_HDCP_KSV_LEN; + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { + memcpy(key->keys[i].bytes, ptr, DP_HDCP_KEY_LEN); + ptr += 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) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + u32 val; + + val = dp_hdcp_read_dp(hdcp, 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) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + struct dp_hdcp_key *key; + int i, ret = 0; + + mutex_lock(&hdcp->key_lock); + + key = hdcp->key; + + if (!key->valid) { + ret = -ENOENT; + goto out; + } + + dp_hdcp_write_dp(hdcp, DP_HDCP_SW_LOWER_AKSV, key->ksv.words[0]); + dp_hdcp_write_dp(hdcp, DP_HDCP_SW_UPPER_AKSV, key->ksv.words[1]); + + for (i = 0; i < DP_HDCP_NUM_KEYS; i++) { + dp_hdcp_write_hdcp(hdcp, DP_HDCP_KEY_LSB(i), + key->keys[i].words[0]); + dp_hdcp_write_hdcp(hdcp, DP_HDCP_KEY_MSB(i), + key->keys[i].words[1]); + } + + dp_hdcp_write_hdcp(hdcp, DP_HDCP_KEY_VALID, DP_HDCP_SW_KEY_VALID); + wmb(); + + dp_hdcp_write_dp(hdcp, DP_HDCP_ENTROPY_CTRL0, get_random_u32()); + dp_hdcp_write_dp(hdcp, DP_HDCP_ENTROPY_CTRL1, get_random_u32()); + wmb(); + +out: + mutex_unlock(&hdcp->key_lock); + return ret; +} + +static int dp_hdcp_hdcp2_capable(struct drm_connector *connector, bool *capable) +{ + *capable = false; + return 0; +} + +static int dp_hdcp_hdcp1_read_an_aksv(struct drm_connector *connector, + u32 *an, u32 *aksv) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + bool keys_valid; + int ret; + u32 val; + + dp_hdcp_write_dp(hdcp, DP_HDCP_CTRL, 1); + + ret = read_poll_timeout(dp_hdcp_are_keys_valid, keys_valid, keys_valid, + 20 * 1000, 10 * 1000, false, connector); + if (ret) { + drm_err(hdcp->dev, "HDCP keys invalid %d\n", ret); + return ret; + } + + /* Clear AInfo */ + dp_hdcp_write_dp(hdcp, DP_HDCP_RCVPORT_DATA4, 0); + + aksv[0] = dp_hdcp_read_dp(hdcp, DP_HDCP_RCVPORT_DATA3); + aksv[1] = GENMASK(7, 0) & dp_hdcp_read_dp(hdcp, DP_HDCP_RCVPORT_DATA4); + + ret = read_poll_timeout(dp_hdcp_read_dp, val, + (val & DP_HDCP_AN_READY_MASK) == DP_HDCP_AN_READY_MASK, + 100, 10 * 1000, false, hdcp, DP_HDCP_STATUS); + if (ret) { + drm_err(hdcp->dev, "AN failed to become ready %x/%d\n", val, ret); + return ret; + } + + /* + * Get An from hardware, for unknown reasons we need to read the reg + * twice to get valid data. + */ + dp_hdcp_read_dp(hdcp, DP_HDCP_RCVPORT_DATA5); + an[0] = dp_hdcp_read_dp(hdcp, DP_HDCP_RCVPORT_DATA5); + + dp_hdcp_read_dp(hdcp, DP_HDCP_RCVPORT_DATA6); + an[1] = dp_hdcp_read_dp(hdcp, DP_HDCP_RCVPORT_DATA6); + + return 0; +} + +static int dp_hdcp_hdcp1_store_receiver_info(struct drm_connector *connector, + u32 *ksv, u32 status, u8 bcaps, + bool is_repeater) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + u32 val; + + dp_hdcp_write_tz(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0, + ksv[0]); + dp_hdcp_write_tz(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1, + ksv[1]); + + val = ((status & GENMASK(15, 0)) << 8) | (bcaps & GENMASK(7, 0)); + + dp_hdcp_write_tz(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12, val); + + return 0; +} + +static int dp_hdcp_hdcp1_enable_encryption(struct drm_connector *connector) +{ + return 0; +} + +static int dp_hdcp_hdcp1_wait_for_r0(struct drm_connector *connector) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int ret; + u32 val; + + ret = read_poll_timeout(dp_hdcp_read_dp, val, (val & DP_HDCP_R0_READY), + 100, 1000, false, hdcp, + 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) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int ret; + u32 val; + + dp_hdcp_write_dp(hdcp, DP_HDCP_RCVPORT_DATA2_0, ri_prime); + + ret = read_poll_timeout(dp_hdcp_read_dp, val, (val & DP_HDCP_RI_MATCH), + 20 * 1000, 100 * 1000, false, hdcp, + 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) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + int num_bytes = (num_downstream * DRM_HDCP_KSV_LEN); + int ret, i; + u32 val; + + /* Reset the SHA computation block */ + dp_hdcp_write_tz(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, + DP_HDCP_SHA_CTRL_RESET); + dp_hdcp_write_tz(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, 0); + + /* + * 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_hdcp_write_tz(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA, + val); + + if (((i + 1) % 64) != 0) + continue; + + ret = read_poll_timeout(dp_hdcp_read_dp, val, + (val & DP_HDCP_SHA_DONE), 100, + 100 * 1000, false, hdcp, + DP_HDCP_SHA_STATUS); + if (ret) { + drm_err(hdcp->dev, "SHA block incomplete %d\n", ret); + return ret; + } + } + + ret = read_poll_timeout(dp_hdcp_read_dp, val, + (val & DP_HDCP_SHA_COMP_DONE), 100, 100 * 1000, + false, hdcp, 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) +{ + struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector); + u32 val; + + val = dp_hdcp_read_dp(hdcp, REG_DP_SW_RESET); + dp_hdcp_write_dp(hdcp, REG_DP_SW_RESET, val | DP_HDCP_SW_RESET); + + /* Disable encryption and disable the HDCP block */ + dp_hdcp_write_dp(hdcp, DP_HDCP_CTRL, 0); + + dp_hdcp_write_dp(hdcp, REG_DP_SW_RESET, val); + + 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, +}; + +int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_hdcp_helper_data *helper_data; + int ret; + + /* HDCP is not configured for this device */ + if (!hdcp || !hdcp->parser || hdcp->parser->io.hdcp_key.len == 0) + return 0; + + helper_data = drm_hdcp_helper_initialize_dp(connector, hdcp->aux, + &dp_hdcp_funcs, false); + if (IS_ERR_OR_NULL(helper_data)) + return PTR_ERR(helper_data); + + ret = drm_connector_attach_content_protection_property(connector, false); + if (ret) { + drm_hdcp_helper_destroy(helper_data); + drm_err(dev, "Failed to attach content protection prop %d\n", ret); + return ret; + } + + hdcp->dev = connector->dev; + hdcp->connector = connector; + hdcp->helper_data = helper_data; + + return 0; +} + +struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux) +{ + struct dp_hdcp *hdcp; + + hdcp = devm_kzalloc(&parser->pdev->dev, sizeof(*hdcp), GFP_KERNEL); + if (!hdcp) + return ERR_PTR(-ENOMEM); + + hdcp->key = devm_kzalloc(&parser->pdev->dev, sizeof(*hdcp->key), GFP_KERNEL); + if (!hdcp->key) + 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) +{ + 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 000000000000..5637a9b0dea2 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hdcp.h @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2021 Google, Inc. + * + * Authors: + * Sean Paul seanpaul@chromium.org + */ + +#ifndef DP_HDCP_H_ +#define DP_HDCP_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); +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 diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 268602803d9a..bc53c56d6120 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -6,11 +6,14 @@ #ifndef _DP_REG_H_ #define _DP_REG_H_
+#include <linux/bits.h> + /* DP_TX Registers */ #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 +286,46 @@ /* DP HDCP 1.3 registers */ #define DP_HDCP_CTRL (0x0A0) #define DP_HDCP_STATUS (0x0A4) -#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_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 (0x298) +#define DP_HDCP_SW_LOWER_AKSV (0x29C) +#define DP_HDCP_ENTROPY_CTRL0 (0x750) +#define DP_HDCP_ENTROPY_CTRL1 (0x75C) #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_DATA3 (0x2A4) +#define DP_HDCP_RCVPORT_DATA4 (0x2A8) #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 fab09e7c6efc..444515277a1d 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -8,6 +8,7 @@ #include <drm/drm_gem_atomic_helper.h> #include <drm/drm_vblank.h>
+#include "dp_drm.h" #include "msm_atomic_trace.h" #include "msm_drv.h" #include "msm_gem.h" @@ -203,6 +204,18 @@ 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_connector_state *conn_state; + struct drm_connector *connector; + int i; + + for_each_new_connector_in_state(state, connector, conn_state, i) { + if (dp_drm_is_connector_msm_dp(connector)) + dp_drm_atomic_commit(connector, conn_state, state); + } +} + void msm_atomic_commit_tail(struct drm_atomic_state *state) { struct drm_device *dev = state->dev; @@ -239,6 +252,8 @@ 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)];