drm/amd/display: Generic SDP message access in amdgpu (c7ba3653) · Commits · 戴 / test

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

+49 −1

Original line number	Diff line number	Diff line
		@@ -688,6 +688,47 @@ static int vrr_range_show(struct seq_file m, void data)

		return 0;
		}

		/* function description
		*
		* generic SDP message access for testing
		*
		* debugfs sdp_message is located at /syskernel/debug/dri/0/DP-x
		*
		* SDP header
		* Hb0 : Secondary-Data Packet ID
		* Hb1 : Secondary-Data Packet type
		* Hb2 : Secondary-Data-packet-specific header, Byte 0
		* Hb3 : Secondary-Data-packet-specific header, Byte 1
		*
		* for using custom sdp message: input 4 bytes SDP header and 32 bytes raw data
		*/
		static ssize_t dp_sdp_message_debugfs_write(struct file f, const char __user buf,
		size_t size, loff_t *pos)
		{
		int r;
		uint8_t data[36];
		struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
		struct dm_crtc_state *acrtc_state;
		uint32_t write_size = 36;

		if (connector->base.status != connector_status_connected)
		return -ENODEV;

		if (size == 0)
		return 0;

		acrtc_state = to_dm_crtc_state(connector->base.state->crtc->state);

		r = copy_from_user(data, buf, write_size);

		write_size -= r;

		dc_stream_send_dp_sdp(acrtc_state->stream, data, write_size);

		return write_size;
		}

		DEFINE_SHOW_ATTRIBUTE(vrr_range);

		static const struct file_operations dp_link_settings_debugfs_fops = {
		@@ -710,6 +751,12 @@ static const struct file_operations dp_phy_test_pattern_fops = {
		.llseek = default_llseek
		};

		static const struct file_operations sdp_message_fops = {
		.owner = THIS_MODULE,
		.write = dp_sdp_message_debugfs_write,
		.llseek = default_llseek
		};

		static const struct {
		char *name;
		const struct file_operations *fops;
		@@ -717,7 +764,8 @@ static const struct {
		{"link_settings", &dp_link_settings_debugfs_fops},
		{"phy_settings", &dp_phy_settings_debugfs_fop},
		{"test_pattern", &dp_phy_test_pattern_fops},
		{"vrr_range", &vrr_range_fops}
		{"vrr_range", &vrr_range_fops},
		{"sdp_message", &sdp_message_fops}
		};

		int connector_debugfs_init(struct amdgpu_dm_connector *connector)

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