e2d8b4289c
Use pageref->offset instead of page->index for deferred-I/O writeback where appropriate. Distinguishes between file-mapping offset and video- memory offset. While at it, also remove unnecessary references to struct page. Fbdev's deferred-I/O code uses the two related page->index and pageref->offset. The former is the page offset in the mapped file, the latter is the byte offset in the video memory (or fbdev screen buffer). It's the same value for fbdev drivers, but for DRM the values can be different. Because GEM buffer objects are mapped at an offset in the DRM device file, page->index has this offset added to it as well. We currently don't hit this case in DRM, because all affected mappings of GEM memory are performed with an internal, intermediate shadow buffer. The value of page->index is required by page_mkclean(), which we call to reset the mappings during the writeback phase of the deferred I/O. The value of pageref->offset is for conveniently getting an offset into video memory in fb helpers. v4: * fix commit message (Javier) Suggested-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220429100834.18898-6-tzimmermann@suse.de |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| README | ||
| TODO | ||
| fb_agm1264k-fl.c | ||
| fb_bd663474.c | ||
| fb_hx8340bn.c | ||
| fb_hx8347d.c | ||
| fb_hx8353d.c | ||
| fb_hx8357d.c | ||
| fb_hx8357d.h | ||
| fb_ili9163.c | ||
| fb_ili9320.c | ||
| fb_ili9325.c | ||
| fb_ili9340.c | ||
| fb_ili9341.c | ||
| fb_ili9481.c | ||
| fb_ili9486.c | ||
| fb_pcd8544.c | ||
| fb_ra8875.c | ||
| fb_s6d02a1.c | ||
| fb_s6d1121.c | ||
| fb_seps525.c | ||
| fb_sh1106.c | ||
| fb_ssd1289.c | ||
| fb_ssd1305.c | ||
| fb_ssd1306.c | ||
| fb_ssd1325.c | ||
| fb_ssd1331.c | ||
| fb_ssd1351.c | ||
| fb_st7735r.c | ||
| fb_st7789v.c | ||
| fb_tinylcd.c | ||
| fb_tls8204.c | ||
| fb_uc1611.c | ||
| fb_uc1701.c | ||
| fb_upd161704.c | ||
| fbtft-bus.c | ||
| fbtft-core.c | ||
| fbtft-io.c | ||
| fbtft-sysfs.c | ||
| fbtft.h | ||
| internal.h | ||
README
FBTFT
=========
Linux Framebuffer drivers for small TFT LCD display modules.
The module 'fbtft' makes writing drivers for some of these displays very easy.
Development is done on a Raspberry Pi running the Raspbian "wheezy" distribution.
INSTALLATION
Download kernel sources
From Linux 3.15
cd drivers/video/fbdev/fbtft
git clone https://github.com/notro/fbtft.git
Add to drivers/video/fbdev/Kconfig: source "drivers/video/fbdev/fbtft/Kconfig"
Add to drivers/video/fbdev/Makefile: obj-y += fbtft/
Before Linux 3.15
cd drivers/video
git clone https://github.com/notro/fbtft.git
Add to drivers/video/Kconfig: source "drivers/video/fbtft/Kconfig"
Add to drivers/video/Makefile: obj-y += fbtft/
Enable driver(s) in menuconfig and build the kernel
See wiki for more information: https://github.com/notro/fbtft/wiki
Source: https://github.com/notro/fbtft/