[PATCH v7 0/7] fbdev: Move framebuffer I/O helpers to

Thomas Zimmermann
2023-05-12T10:24:37Z

Fbdev provides helpers for framebuffer I/O, such as fb_readl(),
fb_writel() or fb_memcpy_to_fb(). The implementation of each helper
depends on the architecture, but they are all equivalent to regular
I/O functions of similar names. So use regular functions instead and
move all helpers into <asm-generic/fb.h>

The first two patch are driver cleanups.

Until now, <linux/fb.h> contained an include of <asm/io.h>. As this
will go away, patches 3 to 5 prepare include statements in the various
drivers. Source files that use regular I/O helpers, such as readl(),
now include <linux/io.h>. Source files that use framebuffer I/O
helpers, such as fb_readl(), now include <linux/fb.h>.

Patch 6 replaces the architecture-based if-else branching in
<linux/fb.h> by helpers in <asm-generic/fb.h>. All helpers use Linux'
existing I/O functions.

Patch 7 harmonizes naming among fbdev and existing I/O functions.

The patchset has been built for a variety of platforms, such as x86-64,
arm, aarch64, ppc64, parisc, m64k, mips and sparc.

v7:
* fix hitfb build warnings (kernel test robot)
v6:
* fix build on 64-bit mips (kernel test robot)
* update fb_io_fops.c
v5:
* fix build on s390
v4:
* keep fb_mem*() as-is on ia64, loongarch, sparc64 (Arnd)
* don't include <asm/fb.h> (Sam)
v3:
* add the new helpers in <asm-generic/fb.h>
* support reordering and native byte order (Geert, Arnd)
v2:
* use Linux I/O helpers (Sam, Arnd)

Thomas Zimmermann (7):
fbdev/hitfb: Cast I/O offset to address
fbdev/matrox: Remove trailing whitespaces
ipu-v3: Include <linux/io.h>
fbdev: Include <linux/io.h> in various drivers
fbdev: Include <linux/fb.h> instead of <asm/fb.h>
fbdev: Move framebuffer I/O helpers into <asm/fb.h>
fbdev: Rename fb_mem*() helpers

arch/ia64/include/asm/fb.h | 20 ++++
arch/loongarch/include/asm/fb.h | 21 ++++
arch/mips/include/asm/fb.h | 22 ++++
arch/parisc/video/fbdev.c | 3 +-
arch/sparc/include/asm/fb.h | 20 ++++
arch/sparc/video/fbdev.c | 1 -
arch/x86/video/fbdev.c | 2 -
drivers/gpu/ipu-v3/ipu-prv.h | 1 +
drivers/staging/sm750fb/sm750.c | 2 +-
drivers/video/fbdev/arcfb.c | 1 +
drivers/video/fbdev/aty/atyfb.h | 2 +
drivers/video/fbdev/aty/mach64_cursor.c | 2 +-
drivers/video/fbdev/chipsfb.c | 2 +-
drivers/video/fbdev/core/fb_io_fops.c | 4 +-
drivers/video/fbdev/core/fbcon.c | 1 -
drivers/video/fbdev/core/fbmem.c | 2 -
drivers/video/fbdev/hitfb.c | 122 +++++++++++---------
drivers/video/fbdev/kyro/fbdev.c | 2 +-
drivers/video/fbdev/matrox/matroxfb_accel.c | 6 +-
drivers/video/fbdev/matrox/matroxfb_base.h | 4 +-
drivers/video/fbdev/pvr2fb.c | 2 +-
drivers/video/fbdev/sstfb.c | 2 +-
drivers/video/fbdev/stifb.c | 4 +-
drivers/video/fbdev/tdfxfb.c | 2 +-
drivers/video/fbdev/wmt_ge_rops.c | 2 +
include/asm-generic/fb.h | 102 ++++++++++++++++
include/linux/fb.h | 55 +--------
27 files changed, 279 insertions(+), 130 deletions(-)

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2.40.1