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Revert "drm/drm_fb_helper: fix fbdev with sparc64"

Browse source 
This reverts commit 4bba72b72c which is
commit 2a1658bf922ffd9b7907e270a7d9cdc9643fc45d upstream.

It breaks the abi of some Android drivers and can be safely reverted as
Android does not currently run on sparc64 systems :)

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I5245629207bf163908a72aeea92495494b71e92c
This commit is contained in:
Greg Kroah-Hartman 2020-08-11 18:44:53 +02:00
commit ba99b3df1a
3 changed files with 1 additions and 18 deletions
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1
drivers/gpu/drm/bochs/bochs_kms.c
View file

@ -194,7 +194,6 @@ int bochs_kms_init(struct bochs_device *bochs)
bochs->dev->mode_config.preferred_depth = 24;
bochs->dev->mode_config.prefer_shadow = 0;
bochs->dev->mode_config.prefer_shadow_fbdev = 1;
bochs->dev->mode_config.fbdev_use_iomem = true;
bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true;
bochs->dev->mode_config.funcs = &bochs_mode_funcs;

6
drivers/gpu/drm/drm_fb_helper.c
View file

@ -390,11 +390,7 @@ static void drm_fb_helper_dirty_blit_real(struct drm_fb_helper *fb_helper,
unsigned int y;
for (y = clip->y1; y < clip->y2; y++) {
if (!fb_helper->dev->mode_config.fbdev_use_iomem)
memcpy(dst, src, len);
else
memcpy_toio((void __iomem *)dst, src, len);
memcpy(dst, src, len);
src += fb->pitches[0];
dst += fb->pitches[0];
}

12
include/drm/drm_mode_config.h
View file

@ -865,18 +865,6 @@ 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:
*