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At least sparc64 requires I/O-specific access to framebuffers. This patch updates the fbdev console accordingly. For drivers with direct access to the framebuffer memory, the callback functions in struct fb_ops test for the type of memory and call the rsp fb_sys_ of fb_cfb_ functions. Read and write operations are implemented internally by DRM's fbdev helper. For drivers that employ a shadow buffer, fbdev's blit function retrieves the framebuffer address as struct dma_buf_map, and uses dma_buf_map interfaces to access the buffer. The bochs driver on sparc64 uses a workaround to flag the framebuffer as I/O memory and avoid a HW exception. With the introduction of struct dma_buf_map, this is not required any longer. The patch removes the rsp code from both, bochs and fbdev. v7: * use min_t(size_t,) (kernel test robot) * return the number of bytes read/written, if any (fbdev testcase) v5: * implement fb_read/fb_write internally (Daniel, Sam) v4: * move dma_buf_map changes into separate patch (Daniel) * TODO list: comment on fbdev updates (Daniel) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Tested-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-11-tzimmermann@suse.de |
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| .. | ||
| bridge | ||
| dp-mst | ||
| afbc.rst | ||
| amdgpu-dc.rst | ||
| amdgpu.rst | ||
| backlight.rst | ||
| drivers.rst | ||
| drm-client.rst | ||
| drm-internals.rst | ||
| drm-kms-helpers.rst | ||
| drm-kms.rst | ||
| drm-mm.rst | ||
| drm-uapi.rst | ||
| i915.rst | ||
| index.rst | ||
| introduction.rst | ||
| kms-properties.csv | ||
| komeda-kms.rst | ||
| mcde.rst | ||
| meson.rst | ||
| msm-crash-dump.rst | ||
| pl111.rst | ||
| tegra.rst | ||
| todo.rst | ||
| tve200.rst | ||
| v3d.rst | ||
| vc4.rst | ||
| vga-switcheroo.rst | ||
| vgaarbiter.rst | ||
| vkms.rst | ||
| xen-front.rst | ||