diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/1741-drm-amd-display-Add-debugfs-entry-for-amdgpu_dm_visu.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.19.8/1741-drm-amd-display-Add-debugfs-entry-for-amdgpu_dm_visu.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/1741-drm-amd-display-Add-debugfs-entry-for-amdgpu_dm_visu.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/1741-drm-amd-display-Add-debugfs-entry-for-amdgpu_dm_visu.patch new file mode 100644 index 00000000..de5fddda --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/1741-drm-amd-display-Add-debugfs-entry-for-amdgpu_dm_visu.patch @@ -0,0 +1,87 @@ +From c9fe247f73dd23858729952a4630f576210a6a8e Mon Sep 17 00:00:00 2001 +From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> +Date: Fri, 22 Mar 2019 10:11:14 -0400 +Subject: [PATCH 1741/2940] drm/amd/display: Add debugfs entry for + amdgpu_dm_visual_confirm + +[Why] +DC provides a few visual confirmation debug options that can be +dynamically changed at runtime to help debug surface programming issues +but we don't have any way to access it from userspace. + +[How] +Add the amdgpu_dm_visual_confirm debugfs entry. +It accepts a string containing the DC visual confirm enum value using +the debugfs attribute helpers. + +The debugfs_create_file_unsafe can be used instead of +debugfs_create_file as per the documentation. + +v2: Use debugfs helpers for getting and setting the value (Christian) + +Cc: Leo Li <sunpeng.li@amd.com> +Cc: Harry Wentland <harry.wentland@amd.com> +Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> +Reviewed-by: Leo Li <sunpeng.li@amd.com> +--- + .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 39 ++++++++++++++++++- + 1 file changed, 38 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 1a9e3d3dfa38..1d5fc5ad3bee 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 +@@ -995,6 +995,35 @@ static const struct drm_info_list amdgpu_dm_debugfs_list[] = { + {"amdgpu_target_backlight_pwm", &target_backlight_read}, + }; + ++/* ++ * Sets the DC visual confirm debug option from the given string. ++ * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm ++ */ ++static int visual_confirm_set(void *data, u64 val) ++{ ++ struct amdgpu_device *adev = data; ++ ++ adev->dm.dc->debug.visual_confirm = (enum visual_confirm)val; ++ ++ return 0; ++} ++ ++/* ++ * Reads the DC visual confirm debug option value into the given buffer. ++ * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_visual_confirm ++ */ ++static int visual_confirm_get(void *data, u64 *val) ++{ ++ struct amdgpu_device *adev = data; ++ ++ *val = adev->dm.dc->debug.visual_confirm; ++ ++ return 0; ++} ++ ++DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get, ++ visual_confirm_set, "%llu\n"); ++ + int dtn_debugfs_init(struct amdgpu_device *adev) + { + static const struct file_operations dtn_log_fops = { +@@ -1020,5 +1049,13 @@ int dtn_debugfs_init(struct amdgpu_device *adev) + adev, + &dtn_log_fops); + +- return PTR_ERR_OR_ZERO(ent); ++ if (IS_ERR(ent)) ++ return PTR_ERR(ent); ++ ++ ent = debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, ++ adev, &visual_confirm_fops); ++ if (IS_ERR(ent)) ++ return PTR_ERR(ent); ++ ++ return 0; + } +-- +2.17.1 + |