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| author | Conor Dooley <conor.dooley@microchip.com> | 2023-06-17 19:08:14 +0100 |
|---|---|---|
| committer | Conor Dooley <conor.dooley@microchip.com> | 2023-06-17 19:19:21 +0100 |
| commit | c1362fd0f2fdebf5c56d505100ba37600b5c20a5 (patch) | |
| tree | d20854c0f267807ecb3aeab41bacd51543b7ab93 /drivers/gpu/drm/drm_fb_helper.c | |
| parent | e2c510d6d630fe6593a0cf87531913b4b08ebeb1 (diff) | |
| parent | 318afa0812049ddaff644482b035ab861d2a920c (diff) | |
| download | linux-stable-c1362fd0f2fdebf5c56d505100ba37600b5c20a5.tar.gz linux-stable-c1362fd0f2fdebf5c56d505100ba37600b5c20a5.tar.bz2 linux-stable-c1362fd0f2fdebf5c56d505100ba37600b5c20a5.zip | |
Merge patch series "Add Sipeed Lichee Pi 4A RISC-V board support"
Jisheng Zhang <jszhang@kernel.org> says:
Sipeed's Lichee Pi 4A development board uses Lichee Module 4A core
module which is powered by T-HEAD's TH1520 SoC. Add minimal device
tree files for the core module and the development board.
Support basic uart/gpio/dmac drivers, so supports booting to a basic
shell.
This also pulls in -rc2, because of some maintainers re-jigging that
went on in the interim in commit 80e62bc8487b ("MAINTAINERS: re-sort
all entries and fields").
Link: https://lore.kernel.org/r/20230617161529.2092-1-jszhang@kernel.org
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 64458982be40..6bb1b8b27d7a 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -641,19 +641,27 @@ static void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y, static void drm_fb_helper_memory_range_to_clip(struct fb_info *info, off_t off, size_t len, struct drm_rect *clip) { + u32 line_length = info->fix.line_length; + u32 fb_height = info->var.yres; off_t end = off + len; u32 x1 = 0; - u32 y1 = off / info->fix.line_length; + u32 y1 = off / line_length; u32 x2 = info->var.xres; - u32 y2 = DIV_ROUND_UP(end, info->fix.line_length); + u32 y2 = DIV_ROUND_UP(end, line_length); + + /* Don't allow any of them beyond the bottom bound of display area */ + if (y1 > fb_height) + y1 = fb_height; + if (y2 > fb_height) + y2 = fb_height; if ((y2 - y1) == 1) { /* * We've only written to a single scanline. Try to reduce * the number of horizontal pixels that need an update. */ - off_t bit_off = (off % info->fix.line_length) * 8; - off_t bit_end = (end % info->fix.line_length) * 8; + off_t bit_off = (off % line_length) * 8; + off_t bit_end = (end % line_length) * 8; x1 = bit_off / info->var.bits_per_pixel; x2 = DIV_ROUND_UP(bit_end, info->var.bits_per_pixel); |