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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.patch100
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
+