summaryrefslogtreecommitdiff
path: root/include/drm/drm_mode_config.h
diff options
context:
space:
mode:
authorThomas Zimmermann <tzimmermann@suse.de>2020-11-03 12:30:15 +0300
committerThomas Zimmermann <tzimmermann@suse.de>2020-11-09 11:20:00 +0300
commit222ec45f4c69dfa8cd02c72928147ac06dffffa2 (patch)
tree8d308eeaecb657f1924c06503d55591f8f0ffc4e /include/drm/drm_mode_config.h
parentb4e7090c242ec64bfa77a69ea7c3cceba21c7a65 (diff)
downloadlinux-222ec45f4c69dfa8cd02c72928147ac06dffffa2.tar.xz
drm/fb_helper: Support framebuffers in I/O memory
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
Diffstat (limited to 'include/drm/drm_mode_config.h')
-rw-r--r--include/drm/drm_mode_config.h12
1 files changed, 0 insertions, 12 deletions
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 5ffbb4ed5b35..ab424ddd7665 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -878,18 +878,6 @@ struct drm_mode_config {
bool prefer_shadow_fbdev;
/**
- * @fbdev_use_iomem:
- *
- * Set to true if framebuffer reside in iomem.
- * When set to true memcpy_toio() is used when copying the framebuffer in
- * drm_fb_helper.drm_fb_helper_dirty_blit_real().
- *
- * FIXME: This should be replaced with a per-mapping is_iomem
- * flag (like ttm does), and then used everywhere in fbdev code.
- */
- bool fbdev_use_iomem;
-
- /**
* @quirk_addfb_prefer_xbgr_30bpp:
*
* Special hack for legacy ADDFB to keep nouveau userspace happy. Should