diff options
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 | 66 |
1 files changed, 66 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 32f05aefda17..4a95d02ce933 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 @@ -3043,6 +3043,64 @@ DEFINE_SHOW_ATTRIBUTE(mst_topo); DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get, visual_confirm_set, "%llu\n"); +/* + * Dumps the DCC_EN bit for each pipe. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dcc_en + */ +static ssize_t dcc_en_bits_read( + struct file *f, + char __user *buf, + size_t size, + loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + struct dc *dc = adev->dm.dc; + char *rd_buf = NULL; + const uint32_t rd_buf_size = 32; + uint32_t result = 0; + int offset = 0; + int num_pipes = dc->res_pool->pipe_count; + int *dcc_en_bits; + int i, r; + + dcc_en_bits = kcalloc(num_pipes, sizeof(int), GFP_KERNEL); + if (!dcc_en_bits) + return -ENOMEM; + + if (!dc->hwss.get_dcc_en_bits) { + kfree(dcc_en_bits); + return 0; + } + + dc->hwss.get_dcc_en_bits(dc, dcc_en_bits); + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + if (!rd_buf) + return -ENOMEM; + + for (i = 0; i < num_pipes; i++) + offset += snprintf(rd_buf + offset, rd_buf_size - offset, + "%d ", dcc_en_bits[i]); + rd_buf[strlen(rd_buf)] = '\n'; + + kfree(dcc_en_bits); + + while (size) { + if (*pos >= rd_buf_size) + break; + r = put_user(*(rd_buf + result), buf); + if (r) + return r; /* r = -EFAULT */ + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + void dtn_debugfs_init(struct amdgpu_device *adev) { static const struct file_operations dtn_log_fops = { @@ -3051,6 +3109,11 @@ void dtn_debugfs_init(struct amdgpu_device *adev) .write = dtn_log_write, .llseek = default_llseek }; + static const struct file_operations dcc_en_bits_fops = { + .owner = THIS_MODULE, + .read = dcc_en_bits_read, + .llseek = default_llseek + }; struct drm_minor *minor = adev_to_drm(adev)->primary; struct dentry *root = minor->debugfs_root; @@ -3078,4 +3141,7 @@ void dtn_debugfs_init(struct amdgpu_device *adev) debugfs_create_file_unsafe("amdgpu_dm_dmcub_trace_event_en", 0644, root, adev, &dmcub_trace_event_state_fops); + + debugfs_create_file_unsafe("amdgpu_dm_dcc_en", 0644, root, adev, + &dcc_en_bits_fops); } |