diff options
| author | David Francis <David.Francis@amd.com> | 2018-11-13 10:37:16 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-01-14 15:04:38 -0500 |
| commit | f284975ef2bcec6eb5ab51f61ea67f460ca49a03 (patch) | |
| tree | 958b4b7fd7165b19283b5d5ec5b5747bf98beb66 /drivers/gpu/drm/amd/display/amdgpu_dm | |
| parent | 04a789bef315a3ed64f296fab21be3933405ea43 (diff) | |
drm/amd/display: Add backlight pwm debugfs
[Why]
ABM enablement testing can be automated if a way of reading
target and current hardware backlight is available
[How]
Expand debugfs interface with two new entries.
Hook directly into dc interface. Units are as
a fraction of 0x1000 = 100%
Use the built-in amdgpu function for creating
read-only debugfs files
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 49 |
1 files changed, 47 insertions, 2 deletions
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 9a7ac58eb18e..cca3e16cda4f 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 @@ -783,6 +783,45 @@ static ssize_t dtn_log_write( return size; } +/* + * Backlight at this moment. Read only. + * As written to display, taking ABM and backlight lut into account. + * Ranges from 0x0 to 0x10000 (= 100% PWM) + */ +static int current_backlight_read(struct seq_file *m, void *data) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *dev = node->minor->dev; + struct amdgpu_device *adev = dev->dev_private; + struct dc *dc = adev->dm.dc; + unsigned int backlight = dc_get_current_backlight_pwm(dc); + + seq_printf(m, "0x%x\n", backlight); + return 0; +} + +/* + * Backlight value that is being approached. Read only. + * As written to display, taking ABM and backlight lut into account. + * Ranges from 0x0 to 0x10000 (= 100% PWM) + */ +static int target_backlight_read(struct seq_file *m, void *data) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *dev = node->minor->dev; + struct amdgpu_device *adev = dev->dev_private; + struct dc *dc = adev->dm.dc; + unsigned int backlight = dc_get_target_backlight_pwm(dc); + + seq_printf(m, "0x%x\n", backlight); + return 0; +} + +static const struct drm_info_list amdgpu_dm_debugfs_list[] = { + {"amdgpu_current_backlight_pwm", ¤t_backlight_read}, + {"amdgpu_target_backlight_pwm", &target_backlight_read}, +}; + int dtn_debugfs_init(struct amdgpu_device *adev) { static const struct file_operations dtn_log_fops = { @@ -793,9 +832,15 @@ int dtn_debugfs_init(struct amdgpu_device *adev) }; struct drm_minor *minor = adev->ddev->primary; - struct dentry *root = minor->debugfs_root; + struct dentry *ent, *root = minor->debugfs_root; + int ret; + + ret = amdgpu_debugfs_add_files(adev, amdgpu_dm_debugfs_list, + ARRAY_SIZE(amdgpu_dm_debugfs_list)); + if (ret) + return ret; - struct dentry *ent = debugfs_create_file( + ent = debugfs_create_file( "amdgpu_dm_dtn_log", 0644, root, |