diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/1655-drm-amd-display-Generic-SDP-message-access-in-amdgpu.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.19.8/1655-drm-amd-display-Generic-SDP-message-access-in-amdgpu.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/1655-drm-amd-display-Generic-SDP-message-access-in-amdgpu.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/1655-drm-amd-display-Generic-SDP-message-access-in-amdgpu.patch new file mode 100644 index 00000000..8a7ebda9 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/1655-drm-amd-display-Generic-SDP-message-access-in-amdgpu.patch @@ -0,0 +1,100 @@ +From e2aa15907fad232481c4802483e560a253f4c530 Mon Sep 17 00:00:00 2001 +From: "Leo (Hanghong) Ma" <hanghong.ma@amd.com> +Date: Thu, 7 Mar 2019 16:18:12 -0500 +Subject: [PATCH 1655/2940] drm/amd/display: Generic SDP message access in + amdgpu + +[Why] +We need to add DP SDP message test debugfs to make sdp message test +more convenient and efficient. + +[How] +Add sdp_message debugfs entry in amdgpu. + +Change-Id: I3bb349566bb255c1515470694b1aff602a12cc77 +Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com> +Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com> +Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> +Acked-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com> +--- + .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 50 ++++++++++++++++++- + 1 file changed, 49 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +index 4a55cde027cf..842ddd37fb81 100644 +--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c ++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +@@ -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) +-- +2.17.1 + |