Hi,
This patch series converts the driver to use drm managed resources to prevent
potential use-after-free issues on driver unbind/rebind and to get rid of the
usage of deprecated APIs.
Changes in v2:
- drop patch "drm/arm/hdlcd: crtc: use drmm_crtc_init_with_planes()"
Danilo Krummrich (6):
drm/arm/hdlcd: use drmm_* to allocate driver structures
drm/arm/hdlcd: replace drm->dev_private with drm_to_hdlcd_priv()
drm/arm/hdlcd: plane: use drm managed resources
drm/arm/hdlcd: use drm_dev_unplug()
drm/arm/hdlcd: crtc: protect device resources after removal
drm/arm/hdlcd: debugfs: protect device resources after removal
drivers/gpu/drm/arm/hdlcd_crtc.c | 76 ++++++++++++++++++++++++--------
drivers/gpu/drm/arm/hdlcd_drv.c | 36 ++++++++-------
drivers/gpu/drm/arm/hdlcd_drv.h | 2 +
3 files changed, 79 insertions(+), 35 deletions(-)
base-commit: 75cebd664d57a78af3e46c14bd2659df0a08847b
--
2.37.3
Using drm_device->dev_private is deprecated. Since we've switched to
devm_drm_dev_alloc(), struct drm_device is now embedded in struct
hdlcd_drm_private, hence we can use container_of() to get the struct
drm_device instance instead.
Signed-off-by: Danilo Krummrich <[email protected]>
---
drivers/gpu/drm/arm/hdlcd_crtc.c | 4 ++--
drivers/gpu/drm/arm/hdlcd_drv.c | 10 ++++------
drivers/gpu/drm/arm/hdlcd_drv.h | 1 +
3 files changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/arm/hdlcd_crtc.c b/drivers/gpu/drm/arm/hdlcd_crtc.c
index 7030339fa232..4a8959d0b2a6 100644
--- a/drivers/gpu/drm/arm/hdlcd_crtc.c
+++ b/drivers/gpu/drm/arm/hdlcd_crtc.c
@@ -275,7 +275,7 @@ static void hdlcd_plane_atomic_update(struct drm_plane *plane,
dest_h = drm_rect_height(&new_plane_state->dst);
scanout_start = drm_fb_dma_get_gem_addr(fb, new_plane_state, 0);
- hdlcd = plane->dev->dev_private;
+ hdlcd = drm_to_hdlcd_priv(plane->dev);
hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_LENGTH, fb->pitches[0]);
hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_PITCH, fb->pitches[0]);
hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_COUNT, dest_h - 1);
@@ -325,7 +325,7 @@ static struct drm_plane *hdlcd_plane_init(struct drm_device *drm)
int hdlcd_setup_crtc(struct drm_device *drm)
{
- struct hdlcd_drm_private *hdlcd = drm->dev_private;
+ struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
struct drm_plane *primary;
int ret;
diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index 463381d11cff..120c87934a91 100644
--- a/drivers/gpu/drm/arm/hdlcd_drv.c
+++ b/drivers/gpu/drm/arm/hdlcd_drv.c
@@ -98,7 +98,7 @@ static void hdlcd_irq_uninstall(struct hdlcd_drm_private *hdlcd)
static int hdlcd_load(struct drm_device *drm, unsigned long flags)
{
- struct hdlcd_drm_private *hdlcd = drm->dev_private;
+ struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
struct platform_device *pdev = to_platform_device(drm->dev);
struct resource *res;
u32 version;
@@ -190,7 +190,7 @@ static int hdlcd_show_underrun_count(struct seq_file *m, void *arg)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *drm = node->minor->dev;
- struct hdlcd_drm_private *hdlcd = drm->dev_private;
+ struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
seq_printf(m, "underrun : %d\n", atomic_read(&hdlcd->buffer_underrun_count));
seq_printf(m, "dma_end : %d\n", atomic_read(&hdlcd->dma_end_count));
@@ -203,7 +203,7 @@ static int hdlcd_show_pxlclock(struct seq_file *m, void *arg)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *drm = node->minor->dev;
- struct hdlcd_drm_private *hdlcd = drm->dev_private;
+ struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
unsigned long clkrate = clk_get_rate(hdlcd->clk);
unsigned long mode_clock = hdlcd->crtc.mode.crtc_clock * 1000;
@@ -253,7 +253,6 @@ static int hdlcd_drm_bind(struct device *dev)
drm = &hdlcd->base;
- drm->dev_private = hdlcd;
dev_set_drvdata(dev, drm);
hdlcd_setup_mode_config(drm);
@@ -324,7 +323,7 @@ static int hdlcd_drm_bind(struct device *dev)
static void hdlcd_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
- struct hdlcd_drm_private *hdlcd = drm->dev_private;
+ struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
drm_dev_unregister(drm);
drm_kms_helper_poll_fini(drm);
@@ -339,7 +338,6 @@ static void hdlcd_drm_unbind(struct device *dev)
pm_runtime_disable(dev);
of_reserved_mem_device_release(dev);
drm_mode_config_cleanup(drm);
- drm->dev_private = NULL;
dev_set_drvdata(dev, NULL);
}
diff --git a/drivers/gpu/drm/arm/hdlcd_drv.h b/drivers/gpu/drm/arm/hdlcd_drv.h
index 3892b36767ac..f1c1da2ac2db 100644
--- a/drivers/gpu/drm/arm/hdlcd_drv.h
+++ b/drivers/gpu/drm/arm/hdlcd_drv.h
@@ -21,6 +21,7 @@ struct hdlcd_drm_private {
#endif
};
+#define drm_to_hdlcd_priv(x) container_of(x, struct hdlcd_drm_private, base)
#define crtc_to_hdlcd_priv(x) container_of(x, struct hdlcd_drm_private, crtc)
static inline void hdlcd_write(struct hdlcd_drm_private *hdlcd,
--
2.37.3