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Date: Thu, 15 Sep 2022 02:32:24 +0200
From: Danilo Krummrich <dakr@...hat.com>
To: daniel@...ll.ch, airlied@...ux.ie, tzimmermann@...e.de,
mripard@...nel.org, stefan@...er.ch, alison.wang@....com
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Danilo Krummrich <dakr@...hat.com>
Subject: [PATCH drm-misc-next 1/8] drm/fsl-dcu: use drmm_* to allocate driver structures
Use drm managed resources to allocate driver structures and get rid of
the deprecated drm_dev_alloc() call and replace it with
devm_drm_dev_alloc().
This also serves as preparation to get rid of drm_device->dev_private
and to fix use-after-free issues on driver unload.
Signed-off-by: Danilo Krummrich <dakr@...hat.com>
---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 7 ++---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 30 +++++++++-------------
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h | 2 +-
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c | 19 +++++++-------
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c | 8 +++---
5 files changed, 31 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
index 2af60d98f48f..a1b8ce70928a 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
@@ -171,15 +171,16 @@ int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev)
{
struct drm_plane *primary;
struct drm_crtc *crtc = &fsl_dev->crtc;
+ struct drm_device *drm = &fsl_dev->base;
int ret;
- fsl_dcu_drm_init_planes(fsl_dev->drm);
+ fsl_dcu_drm_init_planes(drm);
- primary = fsl_dcu_drm_primary_create_plane(fsl_dev->drm);
+ primary = fsl_dcu_drm_primary_create_plane(drm);
if (!primary)
return -ENOMEM;
- ret = drm_crtc_init_with_planes(fsl_dev->drm, crtc, primary, NULL,
+ ret = drm_crtc_init_with_planes(drm, crtc, primary, NULL,
&fsl_dcu_drm_crtc_funcs, NULL);
if (ret) {
primary->funcs->destroy(primary);
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index b4acc3422ba4..a47b72995fcf 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -168,6 +168,7 @@ static const struct drm_driver fsl_dcu_drm_driver = {
static int fsl_dcu_drm_pm_suspend(struct device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
+ struct drm_device *drm = &fsl_dev->base;
int ret;
if (!fsl_dev)
@@ -175,7 +176,7 @@ static int fsl_dcu_drm_pm_suspend(struct device *dev)
disable_irq(fsl_dev->irq);
- ret = drm_mode_config_helper_suspend(fsl_dev->drm);
+ ret = drm_mode_config_helper_suspend(drm);
if (ret) {
enable_irq(fsl_dev->irq);
return ret;
@@ -189,6 +190,7 @@ static int fsl_dcu_drm_pm_suspend(struct device *dev)
static int fsl_dcu_drm_pm_resume(struct device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
+ struct drm_device *drm = &fsl_dev->base;
int ret;
if (!fsl_dev)
@@ -202,10 +204,10 @@ static int fsl_dcu_drm_pm_resume(struct device *dev)
if (fsl_dev->tcon)
fsl_tcon_bypass_enable(fsl_dev->tcon);
- fsl_dcu_drm_init_planes(fsl_dev->drm);
+ fsl_dcu_drm_init_planes(drm);
enable_irq(fsl_dev->irq);
- drm_mode_config_helper_resume(fsl_dev->drm);
+ drm_mode_config_helper_resume(drm);
return 0;
}
@@ -255,9 +257,10 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
int ret;
u8 div_ratio_shift = 0;
- fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
- if (!fsl_dev)
- return -ENOMEM;
+ fsl_dev = devm_drm_dev_alloc(dev, &fsl_dcu_drm_driver,
+ typeof(*fsl_dev), base);
+ if (IS_ERR(fsl_dev))
+ return PTR_ERR(fsl_dev);
id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
if (!id)
@@ -317,28 +320,19 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
fsl_dev->tcon = fsl_tcon_init(dev);
- drm = drm_dev_alloc(&fsl_dcu_drm_driver, dev);
- if (IS_ERR(drm)) {
- ret = PTR_ERR(drm);
- goto unregister_pix_clk;
- }
-
fsl_dev->dev = dev;
- fsl_dev->drm = drm;
fsl_dev->np = dev->of_node;
drm->dev_private = fsl_dev;
dev_set_drvdata(dev, fsl_dev);
ret = drm_dev_register(drm, 0);
if (ret < 0)
- goto put;
+ goto unregister_pix_clk;
drm_fbdev_generic_setup(drm, legacyfb_depth);
return 0;
-put:
- drm_dev_put(drm);
unregister_pix_clk:
clk_unregister(fsl_dev->pix_clk);
disable_clk:
@@ -349,9 +343,9 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
static int fsl_dcu_drm_remove(struct platform_device *pdev)
{
struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
+ struct drm_device *drm = &fsl_dev->base;
- drm_dev_unregister(fsl_dev->drm);
- drm_dev_put(fsl_dev->drm);
+ drm_dev_unregister(drm);
clk_disable_unprepare(fsl_dev->clk);
clk_unregister(fsl_dev->pix_clk);
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
index e2049a0e8a92..20ca13ff618a 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
@@ -177,6 +177,7 @@ struct fsl_dcu_soc_data {
};
struct fsl_dcu_drm_device {
+ struct drm_device base;
struct device *dev;
struct device_node *np;
struct regmap *regmap;
@@ -186,7 +187,6 @@ struct fsl_dcu_drm_device {
struct fsl_tcon *tcon;
/*protects hardware register*/
spinlock_t irq_lock;
- struct drm_device *drm;
struct drm_crtc crtc;
struct drm_encoder encoder;
struct fsl_dcu_drm_connector connector;
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c
index 5b47000738e4..c3d55c0aca9f 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c
@@ -20,15 +20,16 @@ static const struct drm_mode_config_funcs fsl_dcu_drm_mode_config_funcs = {
int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev)
{
+ struct drm_device *drm = &fsl_dev->base;
int ret;
- drm_mode_config_init(fsl_dev->drm);
+ drm_mode_config_init(drm);
- fsl_dev->drm->mode_config.min_width = 0;
- fsl_dev->drm->mode_config.min_height = 0;
- fsl_dev->drm->mode_config.max_width = 2031;
- fsl_dev->drm->mode_config.max_height = 2047;
- fsl_dev->drm->mode_config.funcs = &fsl_dcu_drm_mode_config_funcs;
+ drm->mode_config.min_width = 0;
+ drm->mode_config.min_height = 0;
+ drm->mode_config.max_width = 2031;
+ drm->mode_config.max_height = 2047;
+ drm->mode_config.funcs = &fsl_dcu_drm_mode_config_funcs;
ret = fsl_dcu_drm_crtc_create(fsl_dev);
if (ret)
@@ -42,12 +43,12 @@ int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev)
if (ret)
goto err;
- drm_mode_config_reset(fsl_dev->drm);
- drm_kms_helper_poll_init(fsl_dev->drm);
+ drm_mode_config_reset(drm);
+ drm_kms_helper_poll_init(drm);
return 0;
err:
- drm_mode_config_cleanup(fsl_dev->drm);
+ drm_mode_config_cleanup(drm);
return ret;
}
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
index 4d4a715b429d..b9b02f617cd2 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -22,6 +22,7 @@ int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
struct drm_crtc *crtc)
{
struct drm_encoder *encoder = &fsl_dev->encoder;
+ struct drm_device *drm = &fsl_dev->base;
int ret;
encoder->possible_crtcs = 1;
@@ -30,8 +31,7 @@ int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
if (fsl_dev->tcon)
fsl_tcon_bypass_enable(fsl_dev->tcon);
- ret = drm_simple_encoder_init(fsl_dev->drm, encoder,
- DRM_MODE_ENCODER_LVDS);
+ ret = drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_LVDS);
if (ret < 0)
return ret;
@@ -79,12 +79,12 @@ static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
{
struct drm_encoder *encoder = &fsl_dev->encoder;
struct drm_connector *connector = &fsl_dev->connector.base;
+ struct drm_device *drm = &fsl_dev->base;
int ret;
fsl_dev->connector.encoder = encoder;
- ret = drm_connector_init(fsl_dev->drm, connector,
- &fsl_dcu_drm_connector_funcs,
+ ret = drm_connector_init(drm, connector, &fsl_dcu_drm_connector_funcs,
DRM_MODE_CONNECTOR_LVDS);
if (ret < 0)
return ret;
--
2.37.3
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