[PATCH v2 3/6] drm/vc4: use new debugfs device-centered functions
From: Maíra Canal
Date: Wed Nov 23 2022 - 17:08:24 EST
Currently, vc4 has its own debugfs infrastructure that adds the debugfs
files on drm_dev_register(). With the introduction of the new debugfs,
functions, replace the vc4 debugfs structure with the DRM debugfs
device-centered function, drm_debugfs_add_file().
Moreover, remove the explicit error handling of debugfs related functions,
considering that the only failure mode is -ENOMEM and also that error
handling is not recommended for debugfs functions, as pointed out in [1].
[1] https://lore.kernel.org/all/YWAmZdRwnAt6wh9B@xxxxxxxxx/
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_bo.c | 10 +++------
drivers/gpu/drm/vc4/vc4_crtc.c | 7 ++----
drivers/gpu/drm/vc4/vc4_debugfs.c | 36 ++++++-------------------------
drivers/gpu/drm/vc4/vc4_dpi.c | 5 +----
drivers/gpu/drm/vc4/vc4_drv.c | 1 -
drivers/gpu/drm/vc4/vc4_drv.h | 32 ++++++---------------------
drivers/gpu/drm/vc4/vc4_dsi.c | 6 +-----
drivers/gpu/drm/vc4/vc4_hdmi.c | 12 ++++-------
drivers/gpu/drm/vc4/vc4_hvs.c | 24 ++++++---------------
drivers/gpu/drm/vc4/vc4_v3d.c | 14 ++++--------
drivers/gpu/drm/vc4/vc4_vec.c | 6 +-----
11 files changed, 37 insertions(+), 116 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
index 43d9b3a6a352..c2b7573bd92b 100644
--- a/drivers/gpu/drm/vc4/vc4_bo.c
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
@@ -69,8 +69,8 @@ static void vc4_bo_stats_print(struct drm_printer *p, struct vc4_dev *vc4)
static int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
{
- struct drm_info_node *node = (struct drm_info_node *)m->private;
- struct drm_device *dev = node->minor->dev;
+ struct drm_debugfs_entry *entry = m->private;
+ struct drm_device *dev = entry->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_printer p = drm_seq_file_printer(m);
@@ -993,15 +993,11 @@ int vc4_bo_debugfs_init(struct drm_minor *minor)
{
struct drm_device *drm = minor->dev;
struct vc4_dev *vc4 = to_vc4_dev(drm);
- int ret;
if (!vc4->v3d)
return -ENODEV;
- ret = vc4_debugfs_add_file(minor, "bo_stats",
- vc4_bo_stats_debugfs, NULL);
- if (ret)
- return ret;
+ drm_debugfs_add_file(drm, "bo_stats", vc4_bo_stats_debugfs, NULL);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 0108613e79d5..3ed71105fd3b 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -1096,12 +1096,9 @@ int vc4_crtc_late_register(struct drm_crtc *crtc)
struct drm_device *drm = crtc->dev;
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
const struct vc4_crtc_data *crtc_data = vc4_crtc_to_vc4_crtc_data(vc4_crtc);
- int ret;
- ret = vc4_debugfs_add_regset32(drm->primary, crtc_data->debugfs_name,
- &vc4_crtc->regset);
- if (ret)
- return ret;
+ vc4_debugfs_add_regset32(drm, crtc_data->debugfs_name,
+ &vc4_crtc->regset);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_debugfs.c b/drivers/gpu/drm/vc4/vc4_debugfs.c
index 19cda4f91a82..fac624a663ea 100644
--- a/drivers/gpu/drm/vc4/vc4_debugfs.c
+++ b/drivers/gpu/drm/vc4/vc4_debugfs.c
@@ -34,9 +34,9 @@ vc4_debugfs_init(struct drm_minor *minor)
static int vc4_debugfs_regset32(struct seq_file *m, void *unused)
{
- struct drm_info_node *node = (struct drm_info_node *)m->private;
- struct drm_device *drm = node->minor->dev;
- struct debugfs_regset32 *regset = node->info_ent->data;
+ struct drm_debugfs_entry *entry = m->private;
+ struct drm_device *drm = entry->dev;
+ struct debugfs_regset32 *regset = entry->file.data;
struct drm_printer p = drm_seq_file_printer(m);
int idx;
@@ -50,31 +50,9 @@ static int vc4_debugfs_regset32(struct seq_file *m, void *unused)
return 0;
}
-int vc4_debugfs_add_file(struct drm_minor *minor,
- const char *name,
- int (*show)(struct seq_file*, void*),
- void *data)
+void vc4_debugfs_add_regset32(struct drm_device *drm,
+ const char *name,
+ struct debugfs_regset32 *regset)
{
- struct drm_device *dev = minor->dev;
- struct dentry *root = minor->debugfs_root;
- struct drm_info_list *file;
-
- file = drmm_kzalloc(dev, sizeof(*file), GFP_KERNEL);
- if (!file)
- return -ENOMEM;
-
- file->name = name;
- file->show = show;
- file->data = data;
-
- drm_debugfs_create_files(file, 1, root, minor);
-
- return 0;
-}
-
-int vc4_debugfs_add_regset32(struct drm_minor *minor,
- const char *name,
- struct debugfs_regset32 *regset)
-{
- return vc4_debugfs_add_file(minor, name, vc4_debugfs_regset32, regset);
+ drm_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset);
}
diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
index 1f8f44b7b5a5..18d4fee8c8ef 100644
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -248,11 +248,8 @@ static int vc4_dpi_late_register(struct drm_encoder *encoder)
{
struct drm_device *drm = encoder->dev;
struct vc4_dpi *dpi = to_vc4_dpi(encoder);
- int ret;
- ret = vc4_debugfs_add_regset32(drm->primary, "dpi_regs", &dpi->regset);
- if (ret)
- return ret;
+ vc4_debugfs_add_regset32(drm, "dpi_regs", &dpi->regset);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 5990d8f8c363..c6ca41f0572d 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -320,7 +320,6 @@ static int vc4_drm_bind(struct device *dev)
drm = &vc4->base;
platform_set_drvdata(pdev, drm);
- INIT_LIST_HEAD(&vc4->debugfs_list);
if (!is_vc5) {
ret = drmm_mutex_init(drm, &vc4->bin_bo_lock);
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 515228682e8e..52608f91fcc4 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -221,11 +221,6 @@ struct vc4_dev {
struct drm_private_obj hvs_channels;
struct drm_private_obj load_tracker;
- /* List of vc4_debugfs_info_entry for adding to debugfs once
- * the minor is available (after drm_dev_register()).
- */
- struct list_head debugfs_list;
-
/* Mutex for binner bo allocation. */
struct mutex bin_bo_lock;
/* Reference count for our binner bo. */
@@ -884,28 +879,15 @@ void vc4_crtc_get_margins(struct drm_crtc_state *state,
/* vc4_debugfs.c */
void vc4_debugfs_init(struct drm_minor *minor);
#ifdef CONFIG_DEBUG_FS
-int vc4_debugfs_add_file(struct drm_minor *minor,
- const char *filename,
- int (*show)(struct seq_file*, void*),
- void *data);
-int vc4_debugfs_add_regset32(struct drm_minor *minor,
- const char *filename,
- struct debugfs_regset32 *regset);
+void vc4_debugfs_add_regset32(struct drm_device *drm,
+ const char *filename,
+ struct debugfs_regset32 *regset);
#else
-static inline int vc4_debugfs_add_file(struct drm_minor *minor,
- const char *filename,
- int (*show)(struct seq_file*, void*),
- void *data)
-{
- return 0;
-}
-static inline int vc4_debugfs_add_regset32(struct drm_minor *minor,
- const char *filename,
- struct debugfs_regset32 *regset)
-{
- return 0;
-}
+static inline void vc4_debugfs_add_regset32(struct drm_device *drm,
+ const char *filename,
+ struct debugfs_regset32 *regset)
+{}
#endif
/* vc4_drv.c */
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 878e05d79e81..1a3f4306d51e 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -1376,12 +1376,8 @@ static int vc4_dsi_late_register(struct drm_encoder *encoder)
{
struct drm_device *drm = encoder->dev;
struct vc4_dsi *dsi = to_vc4_dsi(encoder);
- int ret;
- ret = vc4_debugfs_add_regset32(drm->primary, dsi->variant->debugfs_name,
- &dsi->regset);
- if (ret)
- return ret;
+ vc4_debugfs_add_regset32(drm, dsi->variant->debugfs_name, &dsi->regset);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 7c03fd759db8..58a9c7a13d94 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -160,8 +160,8 @@ static bool vc4_hdmi_is_full_range_rgb(struct vc4_hdmi *vc4_hdmi,
static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
{
- struct drm_info_node *node = (struct drm_info_node *)m->private;
- struct vc4_hdmi *vc4_hdmi = node->info_ent->data;
+ struct drm_debugfs_entry *entry = m->private;
+ struct vc4_hdmi *vc4_hdmi = entry->file.data;
struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_printer p = drm_seq_file_printer(m);
int idx;
@@ -1983,13 +1983,9 @@ static int vc4_hdmi_late_register(struct drm_encoder *encoder)
struct drm_device *drm = encoder->dev;
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
const struct vc4_hdmi_variant *variant = vc4_hdmi->variant;
- int ret;
- ret = vc4_debugfs_add_file(drm->primary, variant->debugfs_name,
- vc4_hdmi_debugfs_regs,
- vc4_hdmi);
- if (ret)
- return ret;
+ drm_debugfs_add_file(drm, variant->debugfs_name,
+ vc4_hdmi_debugfs_regs, vc4_hdmi);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index c4453a5ae163..c5c4236ead51 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -93,8 +93,8 @@ void vc4_hvs_dump_state(struct vc4_hvs *hvs)
static int vc4_hvs_debugfs_underrun(struct seq_file *m, void *data)
{
- struct drm_info_node *node = m->private;
- struct drm_device *dev = node->minor->dev;
+ struct drm_debugfs_entry *entry = m->private;
+ struct drm_device *dev = entry->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_printer p = drm_seq_file_printer(m);
@@ -105,8 +105,8 @@ static int vc4_hvs_debugfs_underrun(struct seq_file *m, void *data)
static int vc4_hvs_debugfs_dlist(struct seq_file *m, void *data)
{
- struct drm_info_node *node = m->private;
- struct drm_device *dev = node->minor->dev;
+ struct drm_debugfs_entry *entry = m->private;
+ struct drm_device *dev = entry->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_hvs *hvs = vc4->hvs;
struct drm_printer p = drm_seq_file_printer(m);
@@ -740,7 +740,6 @@ int vc4_hvs_debugfs_init(struct drm_minor *minor)
struct drm_device *drm = minor->dev;
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_hvs *hvs = vc4->hvs;
- int ret;
if (!vc4->hvs)
return -ENODEV;
@@ -750,20 +749,11 @@ int vc4_hvs_debugfs_init(struct drm_minor *minor)
minor->debugfs_root,
&vc4->load_tracker_enabled);
- ret = vc4_debugfs_add_file(minor, "hvs_dlists",
- vc4_hvs_debugfs_dlist, NULL);
- if (ret)
- return ret;
+ drm_debugfs_add_file(drm, "hvs_dlists", vc4_hvs_debugfs_dlist, NULL);
- ret = vc4_debugfs_add_file(minor, "hvs_underrun",
- vc4_hvs_debugfs_underrun, NULL);
- if (ret)
- return ret;
+ drm_debugfs_add_file(drm, "hvs_underrun", vc4_hvs_debugfs_underrun, NULL);
- ret = vc4_debugfs_add_regset32(minor, "hvs_regs",
- &hvs->regset);
- if (ret)
- return ret;
+ vc4_debugfs_add_regset32(drm, "hvs_regs", &hvs->regset);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index 56abb0d6bc39..29a664c8bf44 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -96,8 +96,8 @@ static const struct debugfs_reg32 v3d_regs[] = {
static int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
{
- struct drm_info_node *node = (struct drm_info_node *)m->private;
- struct drm_device *dev = node->minor->dev;
+ struct drm_debugfs_entry *entry = m->private;
+ struct drm_device *dev = entry->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
int ret = vc4_v3d_pm_get(vc4);
@@ -404,19 +404,13 @@ int vc4_v3d_debugfs_init(struct drm_minor *minor)
struct drm_device *drm = minor->dev;
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_v3d *v3d = vc4->v3d;
- int ret;
if (!vc4->v3d)
return -ENODEV;
- ret = vc4_debugfs_add_file(minor, "v3d_ident",
- vc4_v3d_debugfs_ident, NULL);
- if (ret)
- return ret;
+ drm_debugfs_add_file(drm, "v3d_ident", vc4_v3d_debugfs_ident, NULL);
- ret = vc4_debugfs_add_regset32(minor, "v3d_regs", &v3d->regset);
- if (ret)
- return ret;
+ vc4_debugfs_add_regset32(drm, "v3d_regs", &v3d->regset);
return 0;
}
diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
index 92c07e31d632..47174b21cebe 100644
--- a/drivers/gpu/drm/vc4/vc4_vec.c
+++ b/drivers/gpu/drm/vc4/vc4_vec.c
@@ -468,12 +468,8 @@ static int vc4_vec_late_register(struct drm_encoder *encoder)
{
struct drm_device *drm = encoder->dev;
struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
- int ret;
- ret = vc4_debugfs_add_regset32(drm->primary, "vec_regs",
- &vec->regset);
- if (ret)
- return ret;
+ vc4_debugfs_add_regset32(drm, "vec_regs", &vec->regset);
return 0;
}
--
2.38.1