diff options
| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2020-02-11 09:48:18 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-02-25 11:05:57 -0500 |
| commit | 2364076772b11c1ab07fdb62cae4222999c9217f (patch) | |
| tree | a0f12f1cbfafb9ca70550799726e1bb0597a5e71 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | |
| parent | c11e57f0506b0a0335976f8165abd2684480ff0a (diff) | |
drm/amd/display: Add DMUB firmware state debugfs
[Why]
Firmware state helps to debug sequence issues and hangs for DMCUB
commands and we don't have an easy mechanism to dump it from the driver.
[How]
Add a debugfs entry to dump the current firmware state.
Example usage:
cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_fw_state
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 27 |
1 files changed, 27 insertions, 0 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 ead5c05eec92..8ec3b4335c69 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 @@ -732,6 +732,29 @@ static int dmub_tracebuffer_show(struct seq_file *m, void *data) return 0; } +/** + * Returns the DMCUB firmware state contents. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_fw_state + */ +static int dmub_fw_state_show(struct seq_file *m, void *data) +{ + struct amdgpu_device *adev = m->private; + struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info; + uint8_t *state_base; + uint32_t state_size; + + if (!fb_info) + return 0; + + state_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_6_FW_STATE].cpu_addr; + if (!state_base) + return 0; + + state_size = fb_info->fb[DMUB_WINDOW_6_FW_STATE].size; + + return seq_write(m, state_base, state_size); +} + /* * Returns the current and maximum output bpc for the connector. * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc @@ -937,6 +960,7 @@ static ssize_t dp_dpcd_data_read(struct file *f, char __user *buf, return read_size - r; } +DEFINE_SHOW_ATTRIBUTE(dmub_fw_state); DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer); DEFINE_SHOW_ATTRIBUTE(output_bpc); DEFINE_SHOW_ATTRIBUTE(vrr_range); @@ -1249,5 +1273,8 @@ int dtn_debugfs_init(struct amdgpu_device *adev) debugfs_create_file_unsafe("amdgpu_dm_dmub_tracebuffer", 0644, root, adev, &dmub_tracebuffer_fops); + debugfs_create_file_unsafe("amdgpu_dm_dmub_fw_state", 0644, root, + adev, &dmub_fw_state_fops); + return 0; } |