1a193ed20SBhawanpreet Lakha /*
2a193ed20SBhawanpreet Lakha * Copyright 2019 Advanced Micro Devices, Inc.
3a193ed20SBhawanpreet Lakha *
4a193ed20SBhawanpreet Lakha * Permission is hereby granted, free of charge, to any person obtaining a
5a193ed20SBhawanpreet Lakha * copy of this software and associated documentation files (the "Software"),
6a193ed20SBhawanpreet Lakha * to deal in the Software without restriction, including without limitation
7a193ed20SBhawanpreet Lakha * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8a193ed20SBhawanpreet Lakha * and/or sell copies of the Software, and to permit persons to whom the
9a193ed20SBhawanpreet Lakha * Software is furnished to do so, subject to the following conditions:
10a193ed20SBhawanpreet Lakha *
11a193ed20SBhawanpreet Lakha * The above copyright notice and this permission notice shall be included in
12a193ed20SBhawanpreet Lakha * all copies or substantial portions of the Software.
13a193ed20SBhawanpreet Lakha *
14a193ed20SBhawanpreet Lakha * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15a193ed20SBhawanpreet Lakha * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16a193ed20SBhawanpreet Lakha * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17a193ed20SBhawanpreet Lakha * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18a193ed20SBhawanpreet Lakha * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19a193ed20SBhawanpreet Lakha * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20a193ed20SBhawanpreet Lakha * OTHER DEALINGS IN THE SOFTWARE.
21a193ed20SBhawanpreet Lakha *
22a193ed20SBhawanpreet Lakha * Authors: AMD
23a193ed20SBhawanpreet Lakha *
24a193ed20SBhawanpreet Lakha */
25a193ed20SBhawanpreet Lakha
26a193ed20SBhawanpreet Lakha #include "amdgpu_dm_hdcp.h"
27a193ed20SBhawanpreet Lakha #include "amdgpu.h"
28a193ed20SBhawanpreet Lakha #include "amdgpu_dm.h"
2955b50e68SBhawanpreet Lakha #include "dm_helpers.h"
306a99099fSThomas Zimmermann #include <drm/display/drm_hdcp_helper.h>
319037246bSBhawanpreet Lakha #include "hdcp_psp.h"
329037246bSBhawanpreet Lakha
331746d5a1SBhawanpreet Lakha /*
341746d5a1SBhawanpreet Lakha * If the SRM version being loaded is less than or equal to the
351746d5a1SBhawanpreet Lakha * currently loaded SRM, psp will return 0xFFFF as the version
361746d5a1SBhawanpreet Lakha */
371746d5a1SBhawanpreet Lakha #define PSP_SRM_VERSION_MAX 0xFFFF
3855b50e68SBhawanpreet Lakha
39dab8f7e9Szhengbin static bool
lp_write_i2c(void * handle,uint32_t address,const uint8_t * data,uint32_t size)40dab8f7e9Szhengbin lp_write_i2c(void *handle, uint32_t address, const uint8_t *data, uint32_t size)
4155b50e68SBhawanpreet Lakha {
4255b50e68SBhawanpreet Lakha struct dc_link *link = handle;
4355b50e68SBhawanpreet Lakha struct i2c_payload i2c_payloads[] = {{true, address, size, (void *)data} };
44a19de9dbSSrinivasan Shanmugam struct i2c_command cmd = {i2c_payloads, 1, I2C_COMMAND_ENGINE_HW,
45a19de9dbSSrinivasan Shanmugam link->dc->caps.i2c_speed_in_khz};
4655b50e68SBhawanpreet Lakha
4755b50e68SBhawanpreet Lakha return dm_helpers_submit_i2c(link->ctx, link, &cmd);
4855b50e68SBhawanpreet Lakha }
4955b50e68SBhawanpreet Lakha
50dab8f7e9Szhengbin static bool
lp_read_i2c(void * handle,uint32_t address,uint8_t offset,uint8_t * data,uint32_t size)51dab8f7e9Szhengbin lp_read_i2c(void *handle, uint32_t address, uint8_t offset, uint8_t *data, uint32_t size)
5255b50e68SBhawanpreet Lakha {
5355b50e68SBhawanpreet Lakha struct dc_link *link = handle;
5455b50e68SBhawanpreet Lakha
55a19de9dbSSrinivasan Shanmugam struct i2c_payload i2c_payloads[] = {{true, address, 1, &offset},
56a19de9dbSSrinivasan Shanmugam {false, address, size, data} };
57a19de9dbSSrinivasan Shanmugam struct i2c_command cmd = {i2c_payloads, 2, I2C_COMMAND_ENGINE_HW,
58a19de9dbSSrinivasan Shanmugam link->dc->caps.i2c_speed_in_khz};
5955b50e68SBhawanpreet Lakha
6055b50e68SBhawanpreet Lakha return dm_helpers_submit_i2c(link->ctx, link, &cmd);
6155b50e68SBhawanpreet Lakha }
6255b50e68SBhawanpreet Lakha
63dab8f7e9Szhengbin static bool
lp_write_dpcd(void * handle,uint32_t address,const uint8_t * data,uint32_t size)64dab8f7e9Szhengbin lp_write_dpcd(void *handle, uint32_t address, const uint8_t *data, uint32_t size)
6555b50e68SBhawanpreet Lakha {
6655b50e68SBhawanpreet Lakha struct dc_link *link = handle;
6755b50e68SBhawanpreet Lakha
6855b50e68SBhawanpreet Lakha return dm_helpers_dp_write_dpcd(link->ctx, link, address, data, size);
6955b50e68SBhawanpreet Lakha }
7055b50e68SBhawanpreet Lakha
71dab8f7e9Szhengbin static bool
lp_read_dpcd(void * handle,uint32_t address,uint8_t * data,uint32_t size)72dab8f7e9Szhengbin lp_read_dpcd(void *handle, uint32_t address, uint8_t *data, uint32_t size)
7355b50e68SBhawanpreet Lakha {
7455b50e68SBhawanpreet Lakha struct dc_link *link = handle;
7555b50e68SBhawanpreet Lakha
7655b50e68SBhawanpreet Lakha return dm_helpers_dp_read_dpcd(link->ctx, link, address, data, size);
7755b50e68SBhawanpreet Lakha }
78a193ed20SBhawanpreet Lakha
psp_get_srm(struct psp_context * psp,uint32_t * srm_version,uint32_t * srm_size)799037246bSBhawanpreet Lakha static uint8_t *psp_get_srm(struct psp_context *psp, uint32_t *srm_version, uint32_t *srm_size)
809037246bSBhawanpreet Lakha {
811746d5a1SBhawanpreet Lakha struct ta_hdcp_shared_memory *hdcp_cmd;
821746d5a1SBhawanpreet Lakha
83ce97f37bSCandice Li if (!psp->hdcp_context.context.initialized) {
841746d5a1SBhawanpreet Lakha DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized.");
859037246bSBhawanpreet Lakha return NULL;
869037246bSBhawanpreet Lakha }
879037246bSBhawanpreet Lakha
88ce97f37bSCandice Li hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.context.mem_context.shared_buf;
891746d5a1SBhawanpreet Lakha memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory));
901746d5a1SBhawanpreet Lakha
911746d5a1SBhawanpreet Lakha hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_GET_SRM;
921746d5a1SBhawanpreet Lakha psp_hdcp_invoke(psp, hdcp_cmd->cmd_id);
931746d5a1SBhawanpreet Lakha
941746d5a1SBhawanpreet Lakha if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS)
951746d5a1SBhawanpreet Lakha return NULL;
961746d5a1SBhawanpreet Lakha
971746d5a1SBhawanpreet Lakha *srm_version = hdcp_cmd->out_msg.hdcp_get_srm.srm_version;
981746d5a1SBhawanpreet Lakha *srm_size = hdcp_cmd->out_msg.hdcp_get_srm.srm_buf_size;
991746d5a1SBhawanpreet Lakha
1001746d5a1SBhawanpreet Lakha return hdcp_cmd->out_msg.hdcp_get_srm.srm_buf;
1011746d5a1SBhawanpreet Lakha }
1021746d5a1SBhawanpreet Lakha
psp_set_srm(struct psp_context * psp,u8 * srm,uint32_t srm_size,uint32_t * srm_version)103a19de9dbSSrinivasan Shanmugam static int psp_set_srm(struct psp_context *psp,
104a19de9dbSSrinivasan Shanmugam u8 *srm, uint32_t srm_size, uint32_t *srm_version)
1059037246bSBhawanpreet Lakha {
1061746d5a1SBhawanpreet Lakha struct ta_hdcp_shared_memory *hdcp_cmd;
1071746d5a1SBhawanpreet Lakha
108ce97f37bSCandice Li if (!psp->hdcp_context.context.initialized) {
1091746d5a1SBhawanpreet Lakha DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized.");
1101746d5a1SBhawanpreet Lakha return -EINVAL;
1111746d5a1SBhawanpreet Lakha }
1121746d5a1SBhawanpreet Lakha
113ce97f37bSCandice Li hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.context.mem_context.shared_buf;
1141746d5a1SBhawanpreet Lakha memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory));
1151746d5a1SBhawanpreet Lakha
1161746d5a1SBhawanpreet Lakha memcpy(hdcp_cmd->in_msg.hdcp_set_srm.srm_buf, srm, srm_size);
1171746d5a1SBhawanpreet Lakha hdcp_cmd->in_msg.hdcp_set_srm.srm_buf_size = srm_size;
1181746d5a1SBhawanpreet Lakha hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_SET_SRM;
1191746d5a1SBhawanpreet Lakha
1201746d5a1SBhawanpreet Lakha psp_hdcp_invoke(psp, hdcp_cmd->cmd_id);
1211746d5a1SBhawanpreet Lakha
122a19de9dbSSrinivasan Shanmugam if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS ||
123a19de9dbSSrinivasan Shanmugam hdcp_cmd->out_msg.hdcp_set_srm.valid_signature != 1 ||
1241746d5a1SBhawanpreet Lakha hdcp_cmd->out_msg.hdcp_set_srm.srm_version == PSP_SRM_VERSION_MAX)
1251746d5a1SBhawanpreet Lakha return -EINVAL;
1261746d5a1SBhawanpreet Lakha
1271746d5a1SBhawanpreet Lakha *srm_version = hdcp_cmd->out_msg.hdcp_set_srm.srm_version;
1289037246bSBhawanpreet Lakha return 0;
1299037246bSBhawanpreet Lakha }
1309037246bSBhawanpreet Lakha
process_output(struct hdcp_workqueue * hdcp_work)131a193ed20SBhawanpreet Lakha static void process_output(struct hdcp_workqueue *hdcp_work)
132a193ed20SBhawanpreet Lakha {
133a193ed20SBhawanpreet Lakha struct mod_hdcp_output output = hdcp_work->output;
134a193ed20SBhawanpreet Lakha
135a193ed20SBhawanpreet Lakha if (output.callback_stop)
136a193ed20SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->callback_dwork);
137a193ed20SBhawanpreet Lakha
138a193ed20SBhawanpreet Lakha if (output.callback_needed)
139a193ed20SBhawanpreet Lakha schedule_delayed_work(&hdcp_work->callback_dwork,
140a193ed20SBhawanpreet Lakha msecs_to_jiffies(output.callback_delay));
141a193ed20SBhawanpreet Lakha
142a193ed20SBhawanpreet Lakha if (output.watchdog_timer_stop)
143a193ed20SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->watchdog_timer_dwork);
144a193ed20SBhawanpreet Lakha
145a193ed20SBhawanpreet Lakha if (output.watchdog_timer_needed)
146a193ed20SBhawanpreet Lakha schedule_delayed_work(&hdcp_work->watchdog_timer_dwork,
147a193ed20SBhawanpreet Lakha msecs_to_jiffies(output.watchdog_timer_delay));
148a193ed20SBhawanpreet Lakha
14945375a50SBhawanpreet Lakha schedule_delayed_work(&hdcp_work->property_validate_dwork, msecs_to_jiffies(0));
150a193ed20SBhawanpreet Lakha }
151a193ed20SBhawanpreet Lakha
link_lock(struct hdcp_workqueue * work,bool lock)1529037246bSBhawanpreet Lakha static void link_lock(struct hdcp_workqueue *work, bool lock)
1539037246bSBhawanpreet Lakha {
1549037246bSBhawanpreet Lakha int i = 0;
1559037246bSBhawanpreet Lakha
1569037246bSBhawanpreet Lakha for (i = 0; i < work->max_link; i++) {
1579037246bSBhawanpreet Lakha if (lock)
1589037246bSBhawanpreet Lakha mutex_lock(&work[i].mutex);
1599037246bSBhawanpreet Lakha else
1609037246bSBhawanpreet Lakha mutex_unlock(&work[i].mutex);
1619037246bSBhawanpreet Lakha }
1629037246bSBhawanpreet Lakha }
163a19de9dbSSrinivasan Shanmugam
hdcp_update_display(struct hdcp_workqueue * hdcp_work,unsigned int link_index,struct amdgpu_dm_connector * aconnector,u8 content_type,bool enable_encryption)164b1abe558SBhawanpreet Lakha void hdcp_update_display(struct hdcp_workqueue *hdcp_work,
165b1abe558SBhawanpreet Lakha unsigned int link_index,
166b1abe558SBhawanpreet Lakha struct amdgpu_dm_connector *aconnector,
167a19de9dbSSrinivasan Shanmugam u8 content_type,
168b1abe558SBhawanpreet Lakha bool enable_encryption)
169a193ed20SBhawanpreet Lakha {
170a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
171*393e8348SBhawanpreet Lakha struct mod_hdcp_link_adjustment link_adjust;
172*393e8348SBhawanpreet Lakha struct mod_hdcp_display_adjustment display_adjust;
173aa9fdd5dShersen wu unsigned int conn_index = aconnector->base.index;
174a193ed20SBhawanpreet Lakha
175a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_w->mutex);
176aa9fdd5dShersen wu hdcp_w->aconnector[conn_index] = aconnector;
177a193ed20SBhawanpreet Lakha
178*393e8348SBhawanpreet Lakha memset(&link_adjust, 0, sizeof(link_adjust));
179*393e8348SBhawanpreet Lakha memset(&display_adjust, 0, sizeof(display_adjust));
18023eb4191SBhawanpreet Lakha
181b1abe558SBhawanpreet Lakha if (enable_encryption) {
182*393e8348SBhawanpreet Lakha /* Explicitly set the saved SRM as sysfs call will be after we already enabled hdcp
183*393e8348SBhawanpreet Lakha * (s3 resume case)
184f4406d6fSBhawanpreet Lakha */
185f4406d6fSBhawanpreet Lakha if (hdcp_work->srm_size > 0)
186a19de9dbSSrinivasan Shanmugam psp_set_srm(hdcp_work->hdcp.config.psp.handle, hdcp_work->srm,
187a19de9dbSSrinivasan Shanmugam hdcp_work->srm_size,
188f4406d6fSBhawanpreet Lakha &hdcp_work->srm_version);
189f4406d6fSBhawanpreet Lakha
190*393e8348SBhawanpreet Lakha display_adjust.disable = MOD_HDCP_DISPLAY_NOT_DISABLE;
191*393e8348SBhawanpreet Lakha
192*393e8348SBhawanpreet Lakha link_adjust.auth_delay = 2;
193*393e8348SBhawanpreet Lakha
194c2850c12SBhawanpreet Lakha if (content_type == DRM_MODE_HDCP_CONTENT_TYPE0) {
195*393e8348SBhawanpreet Lakha link_adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_0;
196c2850c12SBhawanpreet Lakha } else if (content_type == DRM_MODE_HDCP_CONTENT_TYPE1) {
197*393e8348SBhawanpreet Lakha link_adjust.hdcp1.disable = 1;
198*393e8348SBhawanpreet Lakha link_adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_1;
199c2850c12SBhawanpreet Lakha }
20023eb4191SBhawanpreet Lakha
201b1abe558SBhawanpreet Lakha schedule_delayed_work(&hdcp_w->property_validate_dwork,
202b1abe558SBhawanpreet Lakha msecs_to_jiffies(DRM_HDCP_CHECK_PERIOD_MS));
203b1abe558SBhawanpreet Lakha } else {
204*393e8348SBhawanpreet Lakha display_adjust.disable = MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION;
205aa9fdd5dShersen wu hdcp_w->encryption_status[conn_index] = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
206b1abe558SBhawanpreet Lakha cancel_delayed_work(&hdcp_w->property_validate_dwork);
207b1abe558SBhawanpreet Lakha }
208b1abe558SBhawanpreet Lakha
209*393e8348SBhawanpreet Lakha mod_hdcp_update_display(&hdcp_w->hdcp, conn_index, &link_adjust, &display_adjust, &hdcp_w->output);
210a193ed20SBhawanpreet Lakha
211a193ed20SBhawanpreet Lakha process_output(hdcp_w);
212a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex);
213a193ed20SBhawanpreet Lakha }
214a193ed20SBhawanpreet Lakha
hdcp_remove_display(struct hdcp_workqueue * hdcp_work,unsigned int link_index,struct amdgpu_dm_connector * aconnector)215a30a8c2fSBhawanpreet Lakha static void hdcp_remove_display(struct hdcp_workqueue *hdcp_work,
216a30a8c2fSBhawanpreet Lakha unsigned int link_index,
217a30a8c2fSBhawanpreet Lakha struct amdgpu_dm_connector *aconnector)
218a30a8c2fSBhawanpreet Lakha {
219a30a8c2fSBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
220caa18dd6SDingchen (David) Zhang struct drm_connector_state *conn_state = aconnector->base.state;
221aa9fdd5dShersen wu unsigned int conn_index = aconnector->base.index;
222a30a8c2fSBhawanpreet Lakha
223a30a8c2fSBhawanpreet Lakha mutex_lock(&hdcp_w->mutex);
224aa9fdd5dShersen wu hdcp_w->aconnector[conn_index] = aconnector;
225a30a8c2fSBhawanpreet Lakha
226caa18dd6SDingchen (David) Zhang /* the removal of display will invoke auth reset -> hdcp destroy and
227caa18dd6SDingchen (David) Zhang * we'd expect the Content Protection (CP) property changed back to
228caa18dd6SDingchen (David) Zhang * DESIRED if at the time ENABLED. CP property change should occur
229caa18dd6SDingchen (David) Zhang * before the element removed from linked list.
230caa18dd6SDingchen (David) Zhang */
231caa18dd6SDingchen (David) Zhang if (conn_state && conn_state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
232caa18dd6SDingchen (David) Zhang conn_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;
233caa18dd6SDingchen (David) Zhang
234caa18dd6SDingchen (David) Zhang DRM_DEBUG_DRIVER("[HDCP_DM] display %d, CP 2 -> 1, type %u, DPMS %u\n",
235a19de9dbSSrinivasan Shanmugam aconnector->base.index, conn_state->hdcp_content_type,
236a19de9dbSSrinivasan Shanmugam aconnector->base.dpms);
237caa18dd6SDingchen (David) Zhang }
238caa18dd6SDingchen (David) Zhang
239a30a8c2fSBhawanpreet Lakha mod_hdcp_remove_display(&hdcp_w->hdcp, aconnector->base.index, &hdcp_w->output);
240a30a8c2fSBhawanpreet Lakha
241a30a8c2fSBhawanpreet Lakha process_output(hdcp_w);
242a30a8c2fSBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex);
243a30a8c2fSBhawanpreet Lakha }
244a19de9dbSSrinivasan Shanmugam
hdcp_reset_display(struct hdcp_workqueue * hdcp_work,unsigned int link_index)245a193ed20SBhawanpreet Lakha void hdcp_reset_display(struct hdcp_workqueue *hdcp_work, unsigned int link_index)
246a193ed20SBhawanpreet Lakha {
247a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
248aa9fdd5dShersen wu unsigned int conn_index;
249a193ed20SBhawanpreet Lakha
250a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_w->mutex);
251a193ed20SBhawanpreet Lakha
252a193ed20SBhawanpreet Lakha mod_hdcp_reset_connection(&hdcp_w->hdcp, &hdcp_w->output);
253a193ed20SBhawanpreet Lakha
254da3fd7acSBhawanpreet Lakha cancel_delayed_work(&hdcp_w->property_validate_dwork);
255aa9fdd5dShersen wu
256aa9fdd5dShersen wu for (conn_index = 0; conn_index < AMDGPU_DM_MAX_DISPLAY_INDEX; conn_index++) {
257aa9fdd5dShersen wu hdcp_w->encryption_status[conn_index] =
258aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
259aa9fdd5dShersen wu }
260da3fd7acSBhawanpreet Lakha
261a193ed20SBhawanpreet Lakha process_output(hdcp_w);
262a193ed20SBhawanpreet Lakha
263a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex);
264a193ed20SBhawanpreet Lakha }
265a193ed20SBhawanpreet Lakha
hdcp_handle_cpirq(struct hdcp_workqueue * hdcp_work,unsigned int link_index)266a193ed20SBhawanpreet Lakha void hdcp_handle_cpirq(struct hdcp_workqueue *hdcp_work, unsigned int link_index)
267a193ed20SBhawanpreet Lakha {
268a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
269a193ed20SBhawanpreet Lakha
270a193ed20SBhawanpreet Lakha schedule_work(&hdcp_w->cpirq_work);
271a193ed20SBhawanpreet Lakha }
272a193ed20SBhawanpreet Lakha
event_callback(struct work_struct * work)273a193ed20SBhawanpreet Lakha static void event_callback(struct work_struct *work)
274a193ed20SBhawanpreet Lakha {
275a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work;
276a193ed20SBhawanpreet Lakha
277a193ed20SBhawanpreet Lakha hdcp_work = container_of(to_delayed_work(work), struct hdcp_workqueue,
278a193ed20SBhawanpreet Lakha callback_dwork);
279a193ed20SBhawanpreet Lakha
280a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_work->mutex);
281a193ed20SBhawanpreet Lakha
2822ebbe7c9SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->callback_dwork);
283a193ed20SBhawanpreet Lakha
284a193ed20SBhawanpreet Lakha mod_hdcp_process_event(&hdcp_work->hdcp, MOD_HDCP_EVENT_CALLBACK,
285a193ed20SBhawanpreet Lakha &hdcp_work->output);
286a193ed20SBhawanpreet Lakha
287a193ed20SBhawanpreet Lakha process_output(hdcp_work);
288a193ed20SBhawanpreet Lakha
289a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex);
290a193ed20SBhawanpreet Lakha }
291aa9fdd5dShersen wu
event_property_update(struct work_struct * work)292da3fd7acSBhawanpreet Lakha static void event_property_update(struct work_struct *work)
293da3fd7acSBhawanpreet Lakha {
294a19de9dbSSrinivasan Shanmugam struct hdcp_workqueue *hdcp_work = container_of(work, struct hdcp_workqueue,
295a19de9dbSSrinivasan Shanmugam property_update_work);
296aa9fdd5dShersen wu struct amdgpu_dm_connector *aconnector = NULL;
297aa9fdd5dShersen wu struct drm_device *dev;
298da3fd7acSBhawanpreet Lakha long ret;
299aa9fdd5dShersen wu unsigned int conn_index;
300aa9fdd5dShersen wu struct drm_connector *connector;
301aa9fdd5dShersen wu struct drm_connector_state *conn_state;
302aa9fdd5dShersen wu
303aa9fdd5dShersen wu for (conn_index = 0; conn_index < AMDGPU_DM_MAX_DISPLAY_INDEX; conn_index++) {
304aa9fdd5dShersen wu aconnector = hdcp_work->aconnector[conn_index];
305aa9fdd5dShersen wu
306aa9fdd5dShersen wu if (!aconnector)
307aa9fdd5dShersen wu continue;
308aa9fdd5dShersen wu
309aa9fdd5dShersen wu connector = &aconnector->base;
310aa9fdd5dShersen wu
311aa9fdd5dShersen wu /* check if display connected */
312aa9fdd5dShersen wu if (connector->status != connector_status_connected)
313aa9fdd5dShersen wu continue;
314aa9fdd5dShersen wu
315aa9fdd5dShersen wu conn_state = aconnector->base.state;
316aa9fdd5dShersen wu
317aa9fdd5dShersen wu if (!conn_state)
318aa9fdd5dShersen wu continue;
319aa9fdd5dShersen wu
320aa9fdd5dShersen wu dev = connector->dev;
321aa9fdd5dShersen wu
322aa9fdd5dShersen wu if (!dev)
323aa9fdd5dShersen wu continue;
324da3fd7acSBhawanpreet Lakha
325da3fd7acSBhawanpreet Lakha drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
326da3fd7acSBhawanpreet Lakha mutex_lock(&hdcp_work->mutex);
327da3fd7acSBhawanpreet Lakha
328aa9fdd5dShersen wu if (conn_state->commit) {
329a19de9dbSSrinivasan Shanmugam ret = wait_for_completion_interruptible_timeout(&conn_state->commit->hw_done,
330a19de9dbSSrinivasan Shanmugam 10 * HZ);
331da3fd7acSBhawanpreet Lakha if (ret == 0) {
332a19de9dbSSrinivasan Shanmugam DRM_ERROR("HDCP state unknown! Setting it to DESIRED\n");
333aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] =
334aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
335da3fd7acSBhawanpreet Lakha }
336da3fd7acSBhawanpreet Lakha }
337aa9fdd5dShersen wu if (hdcp_work->encryption_status[conn_index] !=
338aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF) {
339aa9fdd5dShersen wu if (conn_state->hdcp_content_type ==
34072bb5030Shersen wu DRM_MODE_HDCP_CONTENT_TYPE0 &&
341aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] <=
342aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON) {
343aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] DRM_MODE_CONTENT_PROTECTION_ENABLED\n");
344a19de9dbSSrinivasan Shanmugam drm_hdcp_update_content_protection(connector,
345aa9fdd5dShersen wu DRM_MODE_CONTENT_PROTECTION_ENABLED);
346aa9fdd5dShersen wu } else if (conn_state->hdcp_content_type ==
347aa9fdd5dShersen wu DRM_MODE_HDCP_CONTENT_TYPE1 &&
348aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] ==
349aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON) {
350a19de9dbSSrinivasan Shanmugam drm_hdcp_update_content_protection(connector,
351aa9fdd5dShersen wu DRM_MODE_CONTENT_PROTECTION_ENABLED);
352aa9fdd5dShersen wu }
353aa9fdd5dShersen wu } else {
354aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] DRM_MODE_CONTENT_PROTECTION_DESIRED\n");
355a19de9dbSSrinivasan Shanmugam drm_hdcp_update_content_protection(connector,
356a19de9dbSSrinivasan Shanmugam DRM_MODE_CONTENT_PROTECTION_DESIRED);
357aa9fdd5dShersen wu }
358da3fd7acSBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex);
359da3fd7acSBhawanpreet Lakha drm_modeset_unlock(&dev->mode_config.connection_mutex);
360da3fd7acSBhawanpreet Lakha }
361aa9fdd5dShersen wu }
362da3fd7acSBhawanpreet Lakha
event_property_validate(struct work_struct * work)363da3fd7acSBhawanpreet Lakha static void event_property_validate(struct work_struct *work)
364da3fd7acSBhawanpreet Lakha {
365da3fd7acSBhawanpreet Lakha struct hdcp_workqueue *hdcp_work =
366da3fd7acSBhawanpreet Lakha container_of(to_delayed_work(work), struct hdcp_workqueue, property_validate_dwork);
367da3fd7acSBhawanpreet Lakha struct mod_hdcp_display_query query;
368aa9fdd5dShersen wu struct amdgpu_dm_connector *aconnector;
369aa9fdd5dShersen wu unsigned int conn_index;
37079c4ac0dSBhawanpreet Lakha
371da3fd7acSBhawanpreet Lakha mutex_lock(&hdcp_work->mutex);
372da3fd7acSBhawanpreet Lakha
373aa9fdd5dShersen wu for (conn_index = 0; conn_index < AMDGPU_DM_MAX_DISPLAY_INDEX;
374aa9fdd5dShersen wu conn_index++) {
375aa9fdd5dShersen wu aconnector = hdcp_work->aconnector[conn_index];
376da3fd7acSBhawanpreet Lakha
377aa9fdd5dShersen wu if (!aconnector)
378aa9fdd5dShersen wu continue;
379aa9fdd5dShersen wu
380aa9fdd5dShersen wu /* check if display connected */
381aa9fdd5dShersen wu if (aconnector->base.status != connector_status_connected)
382aa9fdd5dShersen wu continue;
383aa9fdd5dShersen wu
384aa9fdd5dShersen wu if (!aconnector->base.state)
385aa9fdd5dShersen wu continue;
386aa9fdd5dShersen wu
387aa9fdd5dShersen wu query.encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
388aa9fdd5dShersen wu mod_hdcp_query_display(&hdcp_work->hdcp, aconnector->base.index,
389aa9fdd5dShersen wu &query);
390aa9fdd5dShersen wu
391aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] disp %d, connector->CP %u, (query, work): (%d, %d)\n",
392aa9fdd5dShersen wu aconnector->base.index,
393aa9fdd5dShersen wu aconnector->base.state->content_protection,
394aa9fdd5dShersen wu query.encryption_status,
395aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index]);
396aa9fdd5dShersen wu
397aa9fdd5dShersen wu if (query.encryption_status !=
398aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index]) {
399aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] encryption_status change from %x to %x\n",
400a19de9dbSSrinivasan Shanmugam hdcp_work->encryption_status[conn_index],
401a19de9dbSSrinivasan Shanmugam query.encryption_status);
402aa9fdd5dShersen wu
403aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] =
404aa9fdd5dShersen wu query.encryption_status;
405aa9fdd5dShersen wu
406aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] trigger property_update_work\n");
407aa9fdd5dShersen wu
408da3fd7acSBhawanpreet Lakha schedule_work(&hdcp_work->property_update_work);
409da3fd7acSBhawanpreet Lakha }
410aa9fdd5dShersen wu }
411da3fd7acSBhawanpreet Lakha
412da3fd7acSBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex);
413da3fd7acSBhawanpreet Lakha }
414a193ed20SBhawanpreet Lakha
event_watchdog_timer(struct work_struct * work)415a193ed20SBhawanpreet Lakha static void event_watchdog_timer(struct work_struct *work)
416a193ed20SBhawanpreet Lakha {
417a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work;
418a193ed20SBhawanpreet Lakha
419a193ed20SBhawanpreet Lakha hdcp_work = container_of(to_delayed_work(work),
420a193ed20SBhawanpreet Lakha struct hdcp_workqueue,
421a193ed20SBhawanpreet Lakha watchdog_timer_dwork);
422a193ed20SBhawanpreet Lakha
423a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_work->mutex);
424a193ed20SBhawanpreet Lakha
4252ebbe7c9SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->watchdog_timer_dwork);
4262ebbe7c9SBhawanpreet Lakha
427a193ed20SBhawanpreet Lakha mod_hdcp_process_event(&hdcp_work->hdcp,
428a193ed20SBhawanpreet Lakha MOD_HDCP_EVENT_WATCHDOG_TIMEOUT,
429a193ed20SBhawanpreet Lakha &hdcp_work->output);
430a193ed20SBhawanpreet Lakha
431a193ed20SBhawanpreet Lakha process_output(hdcp_work);
432a193ed20SBhawanpreet Lakha
433a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex);
434a193ed20SBhawanpreet Lakha }
435a193ed20SBhawanpreet Lakha
event_cpirq(struct work_struct * work)436a193ed20SBhawanpreet Lakha static void event_cpirq(struct work_struct *work)
437a193ed20SBhawanpreet Lakha {
438a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work;
439a193ed20SBhawanpreet Lakha
440a193ed20SBhawanpreet Lakha hdcp_work = container_of(work, struct hdcp_workqueue, cpirq_work);
441a193ed20SBhawanpreet Lakha
442a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_work->mutex);
443a193ed20SBhawanpreet Lakha
444a193ed20SBhawanpreet Lakha mod_hdcp_process_event(&hdcp_work->hdcp, MOD_HDCP_EVENT_CPIRQ, &hdcp_work->output);
445a193ed20SBhawanpreet Lakha
446a193ed20SBhawanpreet Lakha process_output(hdcp_work);
447a193ed20SBhawanpreet Lakha
448a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex);
449a193ed20SBhawanpreet Lakha }
450a193ed20SBhawanpreet Lakha
hdcp_destroy(struct kobject * kobj,struct hdcp_workqueue * hdcp_work)451e96b1b29SNirmoy Das void hdcp_destroy(struct kobject *kobj, struct hdcp_workqueue *hdcp_work)
452a193ed20SBhawanpreet Lakha {
453a193ed20SBhawanpreet Lakha int i = 0;
454a193ed20SBhawanpreet Lakha
455a193ed20SBhawanpreet Lakha for (i = 0; i < hdcp_work->max_link; i++) {
456a193ed20SBhawanpreet Lakha cancel_delayed_work_sync(&hdcp_work[i].callback_dwork);
457a193ed20SBhawanpreet Lakha cancel_delayed_work_sync(&hdcp_work[i].watchdog_timer_dwork);
458a193ed20SBhawanpreet Lakha }
459a193ed20SBhawanpreet Lakha
460e96b1b29SNirmoy Das sysfs_remove_bin_file(kobj, &hdcp_work[0].attr);
4619037246bSBhawanpreet Lakha kfree(hdcp_work->srm);
4629037246bSBhawanpreet Lakha kfree(hdcp_work->srm_temp);
463a193ed20SBhawanpreet Lakha kfree(hdcp_work);
464a193ed20SBhawanpreet Lakha }
465a193ed20SBhawanpreet Lakha
enable_assr(void * handle,struct dc_link * link)466ef9de187SBhawanpreet Lakha static bool enable_assr(void *handle, struct dc_link *link)
467ef9de187SBhawanpreet Lakha {
468ef9de187SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work = handle;
469ef9de187SBhawanpreet Lakha struct mod_hdcp hdcp = hdcp_work->hdcp;
470ef9de187SBhawanpreet Lakha struct psp_context *psp = hdcp.config.psp.handle;
471ef9de187SBhawanpreet Lakha struct ta_dtm_shared_memory *dtm_cmd;
472ef9de187SBhawanpreet Lakha bool res = true;
473ef9de187SBhawanpreet Lakha
474ce97f37bSCandice Li if (!psp->dtm_context.context.initialized) {
475ef9de187SBhawanpreet Lakha DRM_INFO("Failed to enable ASSR, DTM TA is not initialized.");
476ef9de187SBhawanpreet Lakha return false;
477ef9de187SBhawanpreet Lakha }
478ef9de187SBhawanpreet Lakha
479ce97f37bSCandice Li dtm_cmd = (struct ta_dtm_shared_memory *)psp->dtm_context.context.mem_context.shared_buf;
480ef9de187SBhawanpreet Lakha
481ef9de187SBhawanpreet Lakha mutex_lock(&psp->dtm_context.mutex);
482ef9de187SBhawanpreet Lakha memset(dtm_cmd, 0, sizeof(struct ta_dtm_shared_memory));
483ef9de187SBhawanpreet Lakha
484ef9de187SBhawanpreet Lakha dtm_cmd->cmd_id = TA_DTM_COMMAND__TOPOLOGY_ASSR_ENABLE;
485a19de9dbSSrinivasan Shanmugam dtm_cmd->dtm_in_message.topology_assr_enable.display_topology_dig_be_index =
486a19de9dbSSrinivasan Shanmugam link->link_enc_hw_inst;
487ef9de187SBhawanpreet Lakha dtm_cmd->dtm_status = TA_DTM_STATUS__GENERIC_FAILURE;
488ef9de187SBhawanpreet Lakha
489ef9de187SBhawanpreet Lakha psp_dtm_invoke(psp, dtm_cmd->cmd_id);
490ef9de187SBhawanpreet Lakha
491ef9de187SBhawanpreet Lakha if (dtm_cmd->dtm_status != TA_DTM_STATUS__SUCCESS) {
492ef9de187SBhawanpreet Lakha DRM_INFO("Failed to enable ASSR");
493ef9de187SBhawanpreet Lakha res = false;
494ef9de187SBhawanpreet Lakha }
495ef9de187SBhawanpreet Lakha
496ef9de187SBhawanpreet Lakha mutex_unlock(&psp->dtm_context.mutex);
497ef9de187SBhawanpreet Lakha
498ef9de187SBhawanpreet Lakha return res;
499ef9de187SBhawanpreet Lakha }
500ef9de187SBhawanpreet Lakha
update_config(void * handle,struct cp_psp_stream_config * config)501a193ed20SBhawanpreet Lakha static void update_config(void *handle, struct cp_psp_stream_config *config)
502a193ed20SBhawanpreet Lakha {
503a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work = handle;
504a193ed20SBhawanpreet Lakha struct amdgpu_dm_connector *aconnector = config->dm_stream_ctx;
505a193ed20SBhawanpreet Lakha int link_index = aconnector->dc_link->link_index;
506a193ed20SBhawanpreet Lakha struct mod_hdcp_display *display = &hdcp_work[link_index].display;
507a193ed20SBhawanpreet Lakha struct mod_hdcp_link *link = &hdcp_work[link_index].link;
508*393e8348SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
5094d31819aSWayne Lin struct dc_sink *sink = NULL;
510035f5496SAurabindo Pillai bool link_is_hdcp14 = false;
511a193ed20SBhawanpreet Lakha
512a30a8c2fSBhawanpreet Lakha if (config->dpms_off) {
513a30a8c2fSBhawanpreet Lakha hdcp_remove_display(hdcp_work, link_index, aconnector);
514a30a8c2fSBhawanpreet Lakha return;
515a30a8c2fSBhawanpreet Lakha }
5163528cae9SLeo (Hanghong) Ma
5173528cae9SLeo (Hanghong) Ma memset(display, 0, sizeof(*display));
5183528cae9SLeo (Hanghong) Ma memset(link, 0, sizeof(*link));
5193528cae9SLeo (Hanghong) Ma
5203528cae9SLeo (Hanghong) Ma display->index = aconnector->base.index;
521a193ed20SBhawanpreet Lakha display->state = MOD_HDCP_DISPLAY_ACTIVE;
522a193ed20SBhawanpreet Lakha
5234d31819aSWayne Lin if (aconnector->dc_sink)
5244d31819aSWayne Lin sink = aconnector->dc_sink;
5254d31819aSWayne Lin else if (aconnector->dc_em_sink)
5264d31819aSWayne Lin sink = aconnector->dc_em_sink;
5274d31819aSWayne Lin
528a19de9dbSSrinivasan Shanmugam if (sink)
5294d31819aSWayne Lin link->mode = mod_hdcp_signal_type_to_operation_mode(sink->sink_signal);
530a193ed20SBhawanpreet Lakha
531a193ed20SBhawanpreet Lakha display->controller = CONTROLLER_ID_D0 + config->otg_inst;
532aac6d439SWenjing Liu display->dig_fe = config->dig_fe;
533aac6d439SWenjing Liu link->dig_be = config->dig_be;
534a193ed20SBhawanpreet Lakha link->ddc_line = aconnector->dc_link->ddc_hw_inst + 1;
535bf62221eSNicholas Kazlauskas display->stream_enc_idx = config->stream_enc_idx;
536bf62221eSNicholas Kazlauskas link->link_enc_idx = config->link_enc_idx;
537f51d22b0SQingqing Zhuo link->dio_output_id = config->dio_output_idx;
538bf62221eSNicholas Kazlauskas link->phy_idx = config->phy_idx;
53910a36226SWayne Lin
5404d31819aSWayne Lin if (sink)
5414d31819aSWayne Lin link_is_hdcp14 = dc_link_is_hdcp14(aconnector->dc_link, sink->sink_signal);
542035f5496SAurabindo Pillai link->hdcp_supported_informational = link_is_hdcp14;
543a193ed20SBhawanpreet Lakha link->dp.rev = aconnector->dc_link->dpcd_caps.dpcd_rev.raw;
544aac6d439SWenjing Liu link->dp.assr_enabled = config->assr_enabled;
545aac6d439SWenjing Liu link->dp.mst_enabled = config->mst_enabled;
546c32699caSJasdeep Dhillon link->dp.dp2_enabled = config->dp2_enabled;
547f51d22b0SQingqing Zhuo link->dp.usb4_enabled = config->usb4_enabled;
5484fe1fdccSWenjing Liu display->adjust.disable = MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION;
54928f7e897SBhawanpreet Lakha link->adjust.auth_delay = 2;
550c2850c12SBhawanpreet Lakha link->adjust.hdcp1.disable = 0;
551*393e8348SBhawanpreet Lakha hdcp_w->encryption_status[display->index] = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
552a193ed20SBhawanpreet Lakha
553caa18dd6SDingchen (David) Zhang DRM_DEBUG_DRIVER("[HDCP_DM] display %d, CP %d, type %d\n", aconnector->base.index,
554a19de9dbSSrinivasan Shanmugam (!!aconnector->base.state) ?
555a19de9dbSSrinivasan Shanmugam aconnector->base.state->content_protection : -1,
556a19de9dbSSrinivasan Shanmugam (!!aconnector->base.state) ?
557a19de9dbSSrinivasan Shanmugam aconnector->base.state->hdcp_content_type : -1);
55826739690SDingchen (David) Zhang
559*393e8348SBhawanpreet Lakha mutex_lock(&hdcp_w->mutex);
560*393e8348SBhawanpreet Lakha
561*393e8348SBhawanpreet Lakha mod_hdcp_add_display(&hdcp_w->hdcp, link, display, &hdcp_w->output);
562*393e8348SBhawanpreet Lakha
563*393e8348SBhawanpreet Lakha process_output(hdcp_w);
564*393e8348SBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex);
565*393e8348SBhawanpreet Lakha
566a193ed20SBhawanpreet Lakha }
567a193ed20SBhawanpreet Lakha
568a19de9dbSSrinivasan Shanmugam /**
569a19de9dbSSrinivasan Shanmugam * DOC: Add sysfs interface for set/get srm
570a19de9dbSSrinivasan Shanmugam *
571a19de9dbSSrinivasan Shanmugam * NOTE: From the usermodes prospective you only need to call write *ONCE*, the kernel
5729037246bSBhawanpreet Lakha * will automatically call once or twice depending on the size
5739037246bSBhawanpreet Lakha *
5749037246bSBhawanpreet Lakha * call: "cat file > /sys/class/drm/card0/device/hdcp_srm" from usermode no matter what the size is
5759037246bSBhawanpreet Lakha *
5769037246bSBhawanpreet Lakha * The kernel can only send PAGE_SIZE at once and since MAX_SRM_FILE(5120) > PAGE_SIZE(4096),
5779037246bSBhawanpreet Lakha * srm_data_write can be called multiple times.
5789037246bSBhawanpreet Lakha *
5799037246bSBhawanpreet Lakha * sysfs interface doesn't tell us the size we will get so we are sending partial SRMs to psp and on
5809037246bSBhawanpreet Lakha * the last call we will send the full SRM. PSP will fail on every call before the last.
5819037246bSBhawanpreet Lakha *
582a19de9dbSSrinivasan Shanmugam * This means we don't know if the SRM is good until the last call. And because of this
583a19de9dbSSrinivasan Shanmugam * limitation we cannot throw errors early as it will stop the kernel from writing to sysfs
5849037246bSBhawanpreet Lakha *
5859037246bSBhawanpreet Lakha * Example 1:
5869037246bSBhawanpreet Lakha * Good SRM size = 5096
5879037246bSBhawanpreet Lakha * first call to write 4096 -> PSP fails
5889037246bSBhawanpreet Lakha * Second call to write 1000 -> PSP Pass -> SRM is set
5899037246bSBhawanpreet Lakha *
5909037246bSBhawanpreet Lakha * Example 2:
5919037246bSBhawanpreet Lakha * Bad SRM size = 4096
5929037246bSBhawanpreet Lakha * first call to write 4096 -> PSP fails (This is the same as above, but we don't know if this
5939037246bSBhawanpreet Lakha * is the last call)
5949037246bSBhawanpreet Lakha *
5959037246bSBhawanpreet Lakha * Solution?:
5969037246bSBhawanpreet Lakha * 1: Parse the SRM? -> It is signed so we don't know the EOF
5979037246bSBhawanpreet Lakha * 2: We can have another sysfs that passes the size before calling set. -> simpler solution
5989037246bSBhawanpreet Lakha * below
5999037246bSBhawanpreet Lakha *
6009037246bSBhawanpreet Lakha * Easy Solution:
6019037246bSBhawanpreet Lakha * Always call get after Set to verify if set was successful.
6029037246bSBhawanpreet Lakha * +----------------------+
6039037246bSBhawanpreet Lakha * | Why it works: |
6049037246bSBhawanpreet Lakha * +----------------------+
6059037246bSBhawanpreet Lakha * PSP will only update its srm if its older than the one we are trying to load.
6069037246bSBhawanpreet Lakha * Always do set first than get.
6079037246bSBhawanpreet Lakha * -if we try to "1. SET" a older version PSP will reject it and we can "2. GET" the newer
6089037246bSBhawanpreet Lakha * version and save it
6099037246bSBhawanpreet Lakha *
6109037246bSBhawanpreet Lakha * -if we try to "1. SET" a newer version PSP will accept it and we can "2. GET" the
6119037246bSBhawanpreet Lakha * same(newer) version back and save it
6129037246bSBhawanpreet Lakha *
6139037246bSBhawanpreet Lakha * -if we try to "1. SET" a newer version and PSP rejects it. That means the format is
6149037246bSBhawanpreet Lakha * incorrect/corrupted and we should correct our SRM by getting it from PSP
6159037246bSBhawanpreet Lakha */
srm_data_write(struct file * filp,struct kobject * kobj,struct bin_attribute * bin_attr,char * buffer,loff_t pos,size_t count)616a19de9dbSSrinivasan Shanmugam static ssize_t srm_data_write(struct file *filp, struct kobject *kobj,
617a19de9dbSSrinivasan Shanmugam struct bin_attribute *bin_attr, char *buffer,
6189037246bSBhawanpreet Lakha loff_t pos, size_t count)
6199037246bSBhawanpreet Lakha {
6209037246bSBhawanpreet Lakha struct hdcp_workqueue *work;
621a19de9dbSSrinivasan Shanmugam u32 srm_version = 0;
6229037246bSBhawanpreet Lakha
6239037246bSBhawanpreet Lakha work = container_of(bin_attr, struct hdcp_workqueue, attr);
6249037246bSBhawanpreet Lakha link_lock(work, true);
6259037246bSBhawanpreet Lakha
6269037246bSBhawanpreet Lakha memcpy(work->srm_temp + pos, buffer, count);
6279037246bSBhawanpreet Lakha
6289037246bSBhawanpreet Lakha if (!psp_set_srm(work->hdcp.config.psp.handle, work->srm_temp, pos + count, &srm_version)) {
6299037246bSBhawanpreet Lakha DRM_DEBUG_DRIVER("HDCP SRM SET version 0x%X", srm_version);
6309037246bSBhawanpreet Lakha memcpy(work->srm, work->srm_temp, pos + count);
6319037246bSBhawanpreet Lakha work->srm_size = pos + count;
6329037246bSBhawanpreet Lakha work->srm_version = srm_version;
6339037246bSBhawanpreet Lakha }
6349037246bSBhawanpreet Lakha
6359037246bSBhawanpreet Lakha link_lock(work, false);
6369037246bSBhawanpreet Lakha
6379037246bSBhawanpreet Lakha return count;
6389037246bSBhawanpreet Lakha }
6399037246bSBhawanpreet Lakha
srm_data_read(struct file * filp,struct kobject * kobj,struct bin_attribute * bin_attr,char * buffer,loff_t pos,size_t count)640a19de9dbSSrinivasan Shanmugam static ssize_t srm_data_read(struct file *filp, struct kobject *kobj,
641a19de9dbSSrinivasan Shanmugam struct bin_attribute *bin_attr, char *buffer,
6429037246bSBhawanpreet Lakha loff_t pos, size_t count)
6439037246bSBhawanpreet Lakha {
6449037246bSBhawanpreet Lakha struct hdcp_workqueue *work;
645a19de9dbSSrinivasan Shanmugam u8 *srm = NULL;
646a19de9dbSSrinivasan Shanmugam u32 srm_version;
647a19de9dbSSrinivasan Shanmugam u32 srm_size;
6489037246bSBhawanpreet Lakha size_t ret = count;
6499037246bSBhawanpreet Lakha
6509037246bSBhawanpreet Lakha work = container_of(bin_attr, struct hdcp_workqueue, attr);
6519037246bSBhawanpreet Lakha
6529037246bSBhawanpreet Lakha link_lock(work, true);
6539037246bSBhawanpreet Lakha
6549037246bSBhawanpreet Lakha srm = psp_get_srm(work->hdcp.config.psp.handle, &srm_version, &srm_size);
6559037246bSBhawanpreet Lakha
6568ef51b42SJohn van der Kamp if (!srm) {
6578ef51b42SJohn van der Kamp ret = -EINVAL;
6588ef51b42SJohn van der Kamp goto ret;
6598ef51b42SJohn van der Kamp }
6609037246bSBhawanpreet Lakha
6619037246bSBhawanpreet Lakha if (pos >= srm_size)
6629037246bSBhawanpreet Lakha ret = 0;
6639037246bSBhawanpreet Lakha
6649037246bSBhawanpreet Lakha if (srm_size - pos < count) {
6659037246bSBhawanpreet Lakha memcpy(buffer, srm + pos, srm_size - pos);
6669037246bSBhawanpreet Lakha ret = srm_size - pos;
6679037246bSBhawanpreet Lakha goto ret;
6689037246bSBhawanpreet Lakha }
6699037246bSBhawanpreet Lakha
6709037246bSBhawanpreet Lakha memcpy(buffer, srm + pos, count);
6719037246bSBhawanpreet Lakha
6729037246bSBhawanpreet Lakha ret:
6739037246bSBhawanpreet Lakha link_lock(work, false);
6749037246bSBhawanpreet Lakha return ret;
6759037246bSBhawanpreet Lakha }
6769037246bSBhawanpreet Lakha
6779037246bSBhawanpreet Lakha /* From the hdcp spec (5.Renewability) SRM needs to be stored in a non-volatile memory.
6789037246bSBhawanpreet Lakha *
6799037246bSBhawanpreet Lakha * For example,
6809037246bSBhawanpreet Lakha * if Application "A" sets the SRM (ver 2) and we reboot/suspend and later when Application "B"
6819037246bSBhawanpreet Lakha * needs to use HDCP, the version in PSP should be SRM(ver 2). So SRM should be persistent
6829037246bSBhawanpreet Lakha * across boot/reboots/suspend/resume/shutdown
6839037246bSBhawanpreet Lakha *
684a19de9dbSSrinivasan Shanmugam * Currently when the system goes down (suspend/shutdown) the SRM is cleared from PSP. For HDCP
685a19de9dbSSrinivasan Shanmugam * we need to make the SRM persistent.
6869037246bSBhawanpreet Lakha *
6879037246bSBhawanpreet Lakha * -PSP owns the checking of SRM but doesn't have the ability to store it in a non-volatile memory.
6889037246bSBhawanpreet Lakha * -The kernel cannot write to the file systems.
6899037246bSBhawanpreet Lakha * -So we need usermode to do this for us, which is why an interface for usermode is needed
6909037246bSBhawanpreet Lakha *
6919037246bSBhawanpreet Lakha *
6929037246bSBhawanpreet Lakha *
6939037246bSBhawanpreet Lakha * Usermode can read/write to/from PSP using the sysfs interface
6949037246bSBhawanpreet Lakha * For example:
6959037246bSBhawanpreet Lakha * to save SRM from PSP to storage : cat /sys/class/drm/card0/device/hdcp_srm > srmfile
6969037246bSBhawanpreet Lakha * to load from storage to PSP: cat srmfile > /sys/class/drm/card0/device/hdcp_srm
6979037246bSBhawanpreet Lakha */
6989037246bSBhawanpreet Lakha static const struct bin_attribute data_attr = {
6999037246bSBhawanpreet Lakha .attr = {.name = "hdcp_srm", .mode = 0664},
7009037246bSBhawanpreet Lakha .size = PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, /* Limit SRM size */
7019037246bSBhawanpreet Lakha .write = srm_data_write,
7029037246bSBhawanpreet Lakha .read = srm_data_read,
7039037246bSBhawanpreet Lakha };
7049037246bSBhawanpreet Lakha
hdcp_create_workqueue(struct amdgpu_device * adev,struct cp_psp * cp_psp,struct dc * dc)705a19de9dbSSrinivasan Shanmugam struct hdcp_workqueue *hdcp_create_workqueue(struct amdgpu_device *adev,
706a19de9dbSSrinivasan Shanmugam struct cp_psp *cp_psp, struct dc *dc)
707a193ed20SBhawanpreet Lakha {
708a193ed20SBhawanpreet Lakha int max_caps = dc->caps.max_links;
7099037246bSBhawanpreet Lakha struct hdcp_workqueue *hdcp_work;
710a193ed20SBhawanpreet Lakha int i = 0;
711a193ed20SBhawanpreet Lakha
7129037246bSBhawanpreet Lakha hdcp_work = kcalloc(max_caps, sizeof(*hdcp_work), GFP_KERNEL);
713898c7302SFlora Cui if (ZERO_OR_NULL_PTR(hdcp_work))
7149037246bSBhawanpreet Lakha return NULL;
7159037246bSBhawanpreet Lakha
716a19de9dbSSrinivasan Shanmugam hdcp_work->srm = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE,
717a19de9dbSSrinivasan Shanmugam sizeof(*hdcp_work->srm), GFP_KERNEL);
7189037246bSBhawanpreet Lakha
719a19de9dbSSrinivasan Shanmugam if (!hdcp_work->srm)
7209037246bSBhawanpreet Lakha goto fail_alloc_context;
7219037246bSBhawanpreet Lakha
722a19de9dbSSrinivasan Shanmugam hdcp_work->srm_temp = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE,
723a19de9dbSSrinivasan Shanmugam sizeof(*hdcp_work->srm_temp), GFP_KERNEL);
7249037246bSBhawanpreet Lakha
725a19de9dbSSrinivasan Shanmugam if (!hdcp_work->srm_temp)
726a193ed20SBhawanpreet Lakha goto fail_alloc_context;
727a193ed20SBhawanpreet Lakha
728a193ed20SBhawanpreet Lakha hdcp_work->max_link = max_caps;
729a193ed20SBhawanpreet Lakha
730a193ed20SBhawanpreet Lakha for (i = 0; i < max_caps; i++) {
731a193ed20SBhawanpreet Lakha mutex_init(&hdcp_work[i].mutex);
732a193ed20SBhawanpreet Lakha
733a193ed20SBhawanpreet Lakha INIT_WORK(&hdcp_work[i].cpirq_work, event_cpirq);
734da3fd7acSBhawanpreet Lakha INIT_WORK(&hdcp_work[i].property_update_work, event_property_update);
735a193ed20SBhawanpreet Lakha INIT_DELAYED_WORK(&hdcp_work[i].callback_dwork, event_callback);
736a193ed20SBhawanpreet Lakha INIT_DELAYED_WORK(&hdcp_work[i].watchdog_timer_dwork, event_watchdog_timer);
737da3fd7acSBhawanpreet Lakha INIT_DELAYED_WORK(&hdcp_work[i].property_validate_dwork, event_property_validate);
738a193ed20SBhawanpreet Lakha
739e50dc171SBhawanpreet Lakha hdcp_work[i].hdcp.config.psp.handle = &adev->psp;
740de7cc1b4SPrike Liang if (dc->ctx->dce_version == DCN_VERSION_3_1 ||
741e850f6b1SRoman Li dc->ctx->dce_version == DCN_VERSION_3_14 ||
742b5b8ed44SQingqing Zhuo dc->ctx->dce_version == DCN_VERSION_3_15 ||
743de7cc1b4SPrike Liang dc->ctx->dce_version == DCN_VERSION_3_16)
744bf62221eSNicholas Kazlauskas hdcp_work[i].hdcp.config.psp.caps.dtm_v3_supported = 1;
745a193ed20SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.handle = dc_get_link_at_index(dc, i);
74655b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.write_i2c = lp_write_i2c;
74755b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.read_i2c = lp_read_i2c;
74855b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.write_dpcd = lp_write_dpcd;
74955b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.read_dpcd = lp_read_dpcd;
750aa9fdd5dShersen wu
751aa9fdd5dShersen wu memset(hdcp_work[i].aconnector, 0,
752aa9fdd5dShersen wu sizeof(struct amdgpu_dm_connector *) *
753aa9fdd5dShersen wu AMDGPU_DM_MAX_DISPLAY_INDEX);
754aa9fdd5dShersen wu memset(hdcp_work[i].encryption_status, 0,
755aa9fdd5dShersen wu sizeof(enum mod_hdcp_encryption_status) *
756aa9fdd5dShersen wu AMDGPU_DM_MAX_DISPLAY_INDEX);
757a193ed20SBhawanpreet Lakha }
758a193ed20SBhawanpreet Lakha
759a193ed20SBhawanpreet Lakha cp_psp->funcs.update_stream_config = update_config;
760ef9de187SBhawanpreet Lakha cp_psp->funcs.enable_assr = enable_assr;
761a193ed20SBhawanpreet Lakha cp_psp->handle = hdcp_work;
762a193ed20SBhawanpreet Lakha
7639037246bSBhawanpreet Lakha /* File created at /sys/class/drm/card0/device/hdcp_srm*/
7649037246bSBhawanpreet Lakha hdcp_work[0].attr = data_attr;
765fe1c97d0SDavid Ward sysfs_bin_attr_init(&hdcp_work[0].attr);
7669037246bSBhawanpreet Lakha
7679037246bSBhawanpreet Lakha if (sysfs_create_bin_file(&adev->dev->kobj, &hdcp_work[0].attr))
7689037246bSBhawanpreet Lakha DRM_WARN("Failed to create device file hdcp_srm");
7699037246bSBhawanpreet Lakha
770a193ed20SBhawanpreet Lakha return hdcp_work;
771a193ed20SBhawanpreet Lakha
772a193ed20SBhawanpreet Lakha fail_alloc_context:
7739037246bSBhawanpreet Lakha kfree(hdcp_work->srm);
7749037246bSBhawanpreet Lakha kfree(hdcp_work->srm_temp);
775a193ed20SBhawanpreet Lakha kfree(hdcp_work);
776a193ed20SBhawanpreet Lakha
777a193ed20SBhawanpreet Lakha return NULL;
778a193ed20SBhawanpreet Lakha }
779a193ed20SBhawanpreet Lakha
780