- 27 Jun, 2023 40 commits
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Thomas Zimmermann authored
Add Kconfig option CONFIG_FB_DEVICE and make the virtual fbdev device optional. If the new option has not been selected, fbdev does not create files in devfs, sysfs or procfs. Most modern Linux systems run a DRM-based graphics stack that uses the kernel's framebuffer console, but has otherwise deprecated fbdev support. Yet fbdev userspace interfaces are still present. The option makes it possible to use the fbdev subsystem as console implementation without support for userspace. This closes potential entry points to manipulate kernel or I/O memory via framebuffers. It also prevents the execution of driver code via ioctl or sysfs, both of which might allow malicious software to exploit bugs in the fbdev code. A small number of fbdev drivers require struct fbinfo.dev to be initialized, usually for the support of sysfs interface. Make these drivers depend on FB_DEVICE. They can later be fixed if necessary. v3: * effect -> affect in Kconfig help (Daniel) v2: * set FB_DEVICE default to y (Geert) * comment on {get,put}_device() (Sam) * Kconfig fixes (Sam) * add TODO item about FB_DEVICE dependencies (Sam) Signed-off-by:Thomas Zimmermann <tzimmermann@suse.de> Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by:
Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-39-tzimmermann@suse.de
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Thomas Zimmermann authored
Init the class "graphics" before the rest of fbdev. Later steps, such as the sysfs code, depend on the class. Also arrange the module's exit code in reverse order. Unexport the global variable fb_class, which is only shared internally within the fbdev core module. Signed-off-by:
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Thomas Zimmermann authored
Move fbdev's file-I/O code into a separate file and contain it in init and cleanup helpers. No functional changes. v3: * add missing file fb_chrdev.c v2: * rename source file (Sam) * include <linux/compat.h> (Javier, kernel test robot) Signed-off-by:
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Thomas Zimmermann authored
Move fbdev's procfs code into a separate file and contain it in init and cleanup helpers. For the cleanup, replace remove_proc_entry() with proc_remove(). It is equivalent in functionality, but looks more like an inverse of proc_create_seq(). v2: * document proc_remove() usage (Sam) * revert unrelated removal of for_each_registered_fb() Signed-off-by:
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Thomas Zimmermann authored
Move the logic to create and destroy fbdev devices into the new helpers fb_device_create() and fb_device_destroy(). There was a call to fb_cleanup_device() in do_unregister_framebuffer() that was too late. The device had already been removed at this point. Move the call into fb_device_destroy(). Declare the helpers in the new internal header file fb_internal.h, as they are only used within the fbdev core module. Signed-off-by:
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Thomas Zimmermann authored
Move framebuffer and backlight helpers into separate files. Leave fbsysfs.c to sysfs-related code. No functional changes. The framebuffer helpers are not in fbmem.c because they are under GPL-2.0-or-later copyright, while fbmem.c is GPL-2.0. v2: * include <linux/mutex.h> (Sam) Signed-off-by:
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Thomas Zimmermann authored
Pass the Linux device to pm_vt_switch_*() instead of the virtual fbdev device. Prepares fbdev for making struct fb_info.dev optional. The type of device that is passed to the PM functions does not matter much. It is only a token within the internal list of known devices. The PM functions do not refer to any of the device's properties or its type. Signed-off-by:
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Thomas Zimmermann authored
Use the 3dfx hardware device from the Linux device hierarchy as parent device of the i2c adapter. Aligns the driver with the rest of the codebase and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
Javier Martinez Canillas <javierm@redhat.com> Reviewed-by:
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Thomas Zimmermann authored
Detect registered instances of fb_info by reading the reference counter from struct fb_info.read. Avoids looking at the dev field and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Fix case were dev_err() is being called with struct fb_info.dev. Use fb_err() instead. Signed-off-by:
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Thomas Zimmermann authored
Call output helpers in the probe function with the hardware device. The virtual fbdev device has not been initialized at that point. Also prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Pass the hardware device to the DMA helpers dma_alloc_coherent() and dma_free_coherent(). The fbdev device that is currently being used is a software device and does not provide DMA memory. Also update the related dev_*() output statements similarly. Signed-off-by:
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Thomas Zimmermann authored
Fix cases were output helpers are called with struct fb_info.dev. Use fb_dbg() instead. Prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Give struct fb_info to sh7760fb_get_color_info() and use it in call to fb_dbg(). Prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Use the hardware device in struct fb_info.device as parent of the backlight device. Aligns the driver with the rest of the codebase and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
The driver's backlight code requires the framebuffer to be registered. Therefore reorder the init and cleanup calls for both data structures. Signed-off-by:
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Thomas Zimmermann authored
Use the hardware device in struct fb_info.device as parent of the backlight device. Aligns the driver with the rest of the codebase and prepares fbdev for making struct fb_info.dev optional. v2: * add Cc: tag (Dan) Signed-off-by:
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Thomas Zimmermann authored
The driver's backlight code requires the framebuffer to be registered. Therefore reorder the cleanup calls for both data structures. The init calls are already in the correct order. Signed-off-by:
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Thomas Zimmermann authored
Do not assign the hardware device to struct fb_info.dev. The field references the fbdev software device, which is unrelated. Signed-off-by:
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Thomas Zimmermann authored
Use the hardware device in struct fb_info.device as parent of the backlight device. Aligns the driver with the rest of the codebase and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
The driver's backlight code requires the framebuffer to be registered. Therefore reorder the init and cleanup calls for both data structures. Signed-off-by:
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Thomas Zimmermann authored
Replace the use of the fbdev software device, stored in struct fb_info.dev, with the hardware device from struct fb_info.device in load_waveform(). The device is only used for printing errors with dev_err(). This change aligns load_waveform() with the rest of the driver and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Fix cases were output helpers are called with struct fb_info.dev. Use fb_dbg() instead. Prepares fbdev for making struct fb_info.dev optional. v2: * fix another reference to struct fb_info.dev (kernel test reobot) * remove fb_err() from commit message Signed-off-by:
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Thomas Zimmermann authored
Fix cases were output helpers are called with struct fb_info.dev. Use fb_*() helpers instead. Prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Do not assing the Linux device to struct fb_info.dev. The call to register_framebuffer() initializes the field to the fbdev device. Drivers should not override its value. Fixes a bug where the driver incorrectly decreases the hardware device's reference counter and leaks the fbdev device. v2: * add Fixes tag (Dan) Signed-off-by:
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Thomas Zimmermann authored
Fix cases were output helpers are called with struct fb_info.dev. Use fb_info() and fb_err() instead. Signed-off-by:
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Thomas Zimmermann authored
Pass the hardware device to the DMA helpers dma_alloc_wc(), dma_mmap_wc() and dma_free_coherent(). The fbdev device that is currently being used is a software device and does not provide DMA memory. Signed-off-by:
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Thomas Zimmermann authored
Call device_remove_file() with the same device that has been used for device_create_file(), which is the hardware device stored in struct fb_info.device. Prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
Use the hardware device in struct fb_info.device as parent of the backlight device. Aligns the driver with the rest of the codebase and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
The driver's backlight code requires the framebuffer to be registered. Therefore reorder the init and cleanup calls for both data structures. Signed-off-by:
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Thomas Zimmermann authored
Use the hardware device in struct fb_info.device as parent of the backlight device. Aligns the driver with the rest of the codebase and prepares fbdev for making struct fb_info.dev optional. Signed-off-by:
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Thomas Zimmermann authored
The driver's backlight code requires the framebuffer to be registered. Therefore reorder the init and cleanup calls for both data structures. Signed-off-by:
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Thomas Zimmermann authored
Rename struct lv5207lp_platform_data.fbdev to 'dev', as it stores a pointer to the Linux platform device; not the fbdev device. Makes the code easier to understand. Signed-off-by:
Daniel Thompson <daniel.thompson@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-7-tzimmermann@suse.de
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Thomas Zimmermann authored
Struct lv5207lp_platform_data refers to a platform device within the Linux device hierarchy. The test in lv5207lp_backlight_check_fb() compares it against the fbdev device in struct fb_info.dev, which is different. Fix the test by comparing to struct fb_info.device. Fixes a bug in the backlight driver and prepares fbdev for making struct fb_info.dev optional. v2: * move renames into separate patch (Javier, Sam, Michael) Fixes: 82e5c40d ("backlight: Add Sanyo LV5207LP backlight driver") Signed-off-by:
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Thomas Zimmermann authored
Rename the field 'fbdev' in struct gpio_backlight_platform_data and struct gpio_backlight to 'dev', as they store pointers to the Linux platform device; not the fbdev device. Makes the code easier to understand. Signed-off-by:
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Thomas Zimmermann authored
Struct gpio_backlight_platform_data refers to a platform device within the Linux device hierarchy. The test in gpio_backlight_check_fb() compares it against the fbdev device in struct fb_info.dev, which is different. Fix the test by comparing to struct fb_info.device. Fixes a bug in the backlight driver and prepares fbdev for making struct fb_info.dev optional. v2: * move renames into separate patch (Javier, Sam, Michael) Signed-off-by:
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Thomas Zimmermann authored
Rename struct bd6107_platform_data.fbdev to 'dev', as it stores a pointer to the Linux platform device; not the fbdev device. Makes the code easier to understand. Signed-off-by:
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Thomas Zimmermann authored
Struct bd6107_platform_data refers to a platform device within the Linux device hierarchy. The test in bd6107_backlight_check_fb() compares it against the fbdev device in struct fb_info.dev, which is different. Fix the test by comparing to struct fb_info.device. Fixes a bug in the backlight driver and prepares fbdev for making struct fb_info.dev optional. v2: * move renames into separate patch (Javier, Sam, Michael) Fixes: 67b43e59 ("backlight: Add ROHM BD6107 backlight driver") Signed-off-by:
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Adrián Larumbe authored
The hdmi_datamap enum is no longer in use. Also reindent enable_audio's call params. Signed-off-by:
Adrián Larumbe <adrian.larumbe@collabora.com> Acked-by:
Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by:
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Adrián Larumbe authored
The current output bus format selection logic is enforcing YUV420 even when the drm mode allows for other bus formats as well. Fix it by adding check for 420-only drm modes. Signed-off-by:
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