[PATCH v4 3/4] fbdev: omapfb: Make FB_DEVICE dependency optional

Chintan Patel
2026-01-07T04:43:19Z

omapfb provides several sysfs interfaces for framebuffer configuration
and debugging, but these are not required for the core driver.

Remove the hard dependency on CONFIG_FB_DEVICE and make sysfs support
optional by using dev_of_fbinfo() to obtain the backing device at runtime.
When FB_DEVICE is disabled, sysfs operations are skipped while the code
still builds and is type-checked.

Suggested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Chintan Patel <chintanlike@gmail.com>
---
drivers/video/fbdev/omap2/omapfb/Kconfig | 3 ++-
.../video/fbdev/omap2/omapfb/omapfb-sysfs.c | 18 ++++++++++++++----
2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/Kconfig b/drivers/video/fbdev/omap2/omapfb/Kconfig
index f4cdf999a080..2d20e79adefc 100644
--- a/drivers/video/fbdev/omap2/omapfb/Kconfig
+++ b/drivers/video/fbdev/omap2/omapfb/Kconfig
@@ -5,7 +5,6 @@ config OMAP2_VRFB
menuconfig FB_OMAP2
tristate "OMAP2+ frame buffer support"
depends on FB
- depends on FB_DEVICE
depends on DRM_OMAP = n
depends on GPIOLIB
select FB_OMAP2_DSS
@@ -13,6 +12,8 @@ menuconfig FB_OMAP2
select FB_IOMEM_HELPERS
help
Frame buffer driver for OMAP2+ based boards.
+ FB_DEVICE is not required, but if enabled, provides sysfs interface
+ for framebuffer configuration and debugging.

if FB_OMAP2

diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
index 831b2c2fbdf9..38a635d38d58 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
@@ -558,10 +558,15 @@ int omapfb_create_sysfs(struct omapfb2_device *fbdev)

DBG("create sysfs for fbs\n");
for (i = 0; i < fbdev->num_fbs; i++) {
+ struct device *dev;
int t;
+
+ dev = dev_of_fbinfo(fbdev->fbs[i]);
+ if (!dev)
+ continue;
+
for (t = 0; t < ARRAY_SIZE(omapfb_attrs); t++) {
- r = device_create_file(fbdev->fbs[i]->dev,
- &omapfb_attrs[t]);
+ r = device_create_file(dev, &omapfb_attrs[t]);

if (r) {
dev_err(fbdev->dev, "failed to create sysfs "
@@ -580,9 +585,14 @@ void omapfb_remove_sysfs(struct omapfb2_device *fbdev)

DBG("remove sysfs for fbs\n");
for (i = 0; i < fbdev->num_fbs; i++) {
+ struct device *dev;
+
+ dev = dev_of_fbinfo(fbdev->fbs[i]);
+ if (!dev)
+ continue;
+
for (t = 0; t < ARRAY_SIZE(omapfb_attrs); t++)
- device_remove_file(fbdev->fbs[i]->dev,
- &omapfb_attrs[t]);
+ device_remove_file(dev, &omapfb_attrs[t]);
}
}

--
2.43.0