drm/amd/display: call psp set/get interfaces (1746d5a1) · Commits · 戴 / test

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c

+49 −1

Original line number	Diff line number	Diff line
		@@ -30,6 +30,11 @@
		#include <drm/drm_hdcp.h>
		#include "hdcp_psp.h"

		/*
		* If the SRM version being loaded is less than or equal to the
		* currently loaded SRM, psp will return 0xFFFF as the version
		*/
		#define PSP_SRM_VERSION_MAX 0xFFFF

		static bool
		lp_write_i2c(void handle, uint32_t address, const uint8_t data, uint32_t size)
		@@ -71,11 +76,54 @@ lp_read_dpcd(void handle, uint32_t address, uint8_t data, uint32_t size)

		static uint8_t psp_get_srm(struct psp_context psp, uint32_t srm_version, uint32_t srm_size)
		{

		struct ta_hdcp_shared_memory *hdcp_cmd;

		if (!psp->hdcp_context.hdcp_initialized) {
		DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized.");
		return NULL;
		}

		hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.hdcp_shared_buf;
		memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory));

		hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_GET_SRM;
		psp_hdcp_invoke(psp, hdcp_cmd->cmd_id);

		if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS)
		return NULL;

		*srm_version = hdcp_cmd->out_msg.hdcp_get_srm.srm_version;
		*srm_size = hdcp_cmd->out_msg.hdcp_get_srm.srm_buf_size;


		return hdcp_cmd->out_msg.hdcp_get_srm.srm_buf;
		}

		static int psp_set_srm(struct psp_context psp, uint8_t srm, uint32_t srm_size, uint32_t *srm_version)
		{

		struct ta_hdcp_shared_memory *hdcp_cmd;

		if (!psp->hdcp_context.hdcp_initialized) {
		DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized.");
		return -EINVAL;
		}

		hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.hdcp_shared_buf;
		memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory));

		memcpy(hdcp_cmd->in_msg.hdcp_set_srm.srm_buf, srm, srm_size);
		hdcp_cmd->in_msg.hdcp_set_srm.srm_buf_size = srm_size;
		hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_SET_SRM;

		psp_hdcp_invoke(psp, hdcp_cmd->cmd_id);

		if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS \|\| hdcp_cmd->out_msg.hdcp_set_srm.valid_signature != 1 \|\|
		hdcp_cmd->out_msg.hdcp_set_srm.srm_version == PSP_SRM_VERSION_MAX)
		return -EINVAL;

		*srm_version = hdcp_cmd->out_msg.hdcp_set_srm.srm_version;
		return 0;
		}

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