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* [PATCH v4 0/8] firmware/sysfb: Track parent device for screen_info
@ 2024-02-12  9:06 Thomas Zimmermann
  2024-02-12  9:06 ` [PATCH v4 1/8] video: Add helpers for decoding screen_info Thomas Zimmermann
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: Thomas Zimmermann @ 2024-02-12  9:06 UTC (permalink / raw)
  To: javierm, sui.jingfeng, pjones, deller, ardb
  Cc: dri-devel, linux-fbdev, Thomas Zimmermann

Detect the firmware framebuffer's parent device from the global
screen_info state and set up the framebuffer's device accordingly.
Remove the equivalent functionality from efifb. Other drivers for
firmware framebuffers, such as simpledrm or vesafb, now add these
new features.

Patches 1 and 2 provide a set of helper functions to avoid parsing
the screen_info values manually. Decoding screen_info is fragile and
many drivers get it wrong. We should later adopt these helpers in
existing drivers, such as efifb, vesafb, as well.

Patches 3 and 4 set the firmware framebuffer's parent device. There
is code in efifb to do something similar for power management. That
is now obsolete and being cleaned up. Setting the parent device makes
Linux track the power management correctly.

Patches 5 and 6 track the parent device's enable state. We don't
create framebuffer devices if the underlying hardware device has been
disabled. Remove the functionality from efifb.

Patches 7 and 8 track the parent device's PCI BAR location. It can
happen on aarch64 that the firmware framebuffer moves its location
during the kernel's boot. We now fix up the screen_info state to
point to the correct location. Again remove such functionality from
efifb.

v4:
	* fix sysfb.h header file
v3:
	* filter PCI device list with pci_get_base_class() (Sui)
	* fix error handling for screen_info_pci_dev() (Sui)
	* fix build for CONFIG_SYSFB_SIMPLEFB=n (Sui)
	* small cleanups
v2:
	* small refactorings throughout the patchset

Thomas Zimmermann (8):
  video: Add helpers for decoding screen_info
  video: Provide screen_info_get_pci_dev() to find screen_info's PCI
    device
  firmware/sysfb: Set firmware-framebuffer parent device
  fbdev/efifb: Remove PM for parent device
  firmware/sysfb: Create firmware device only for enabled PCI devices
  fbdev/efifb: Do not track parent device status
  firmware/sysfb: Update screen_info for relocated EFI framebuffers
  fbdev/efifb: Remove framebuffer relocation tracking

 drivers/firmware/Kconfig            |   1 +
 drivers/firmware/sysfb.c            |  51 +++++++++-
 drivers/firmware/sysfb_simplefb.c   |   5 +-
 drivers/video/Kconfig               |   4 +
 drivers/video/Makefile              |   4 +
 drivers/video/fbdev/efifb.c         |  97 +-----------------
 drivers/video/screen_info_generic.c | 146 ++++++++++++++++++++++++++++
 drivers/video/screen_info_pci.c     | 136 ++++++++++++++++++++++++++
 include/linux/screen_info.h         | 126 ++++++++++++++++++++++++
 include/linux/sysfb.h               |   6 +-
 10 files changed, 480 insertions(+), 96 deletions(-)
 create mode 100644 drivers/video/screen_info_generic.c
 create mode 100644 drivers/video/screen_info_pci.c

-- 
2.43.0


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2024-02-12  9:07 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-02-12  9:06 [PATCH v4 0/8] firmware/sysfb: Track parent device for screen_info Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 1/8] video: Add helpers for decoding screen_info Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 2/8] video: Provide screen_info_get_pci_dev() to find screen_info's PCI device Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 3/8] firmware/sysfb: Set firmware-framebuffer parent device Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 4/8] fbdev/efifb: Remove PM for " Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 5/8] firmware/sysfb: Create firmware device only for enabled PCI devices Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 6/8] fbdev/efifb: Do not track parent device status Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 7/8] firmware/sysfb: Update screen_info for relocated EFI framebuffers Thomas Zimmermann
2024-02-12  9:06 ` [PATCH v4 8/8] fbdev/efifb: Remove framebuffer relocation tracking Thomas Zimmermann

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