From: Noralf Trønnes noralf@tronnes.org
stable inclusion from stable-v5.10.83 commit 146283f16b7e857d688b72f42e46d9567bef6e96 bugzilla: 185879 https://gitee.com/openeuler/kernel/issues/I4QUVG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 7865dd24934ad580d1bcde8f63c39f324211a23b upstream.
Commit b4a1ed0cd18b ("fbdev: make FB_BACKLIGHT a tristate") forgot to update fbtft breaking its backlight support when FB_BACKLIGHT is a module.
Since FB_TFT selects FB_BACKLIGHT there's no need for this conditional so just remove it and we're good.
Fixes: b4a1ed0cd18b ("fbdev: make FB_BACKLIGHT a tristate") Cc: stable@vger.kernel.org Acked-by: Sam Ravnborg sam@ravnborg.org Signed-off-by: Noralf Trønnes noralf@tronnes.org Link: https://lore.kernel.org/r/20211105204358.2991-1-noralf@tronnes.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/staging/fbtft/fb_ssd1351.c | 4 ---- drivers/staging/fbtft/fbtft-core.c | 9 +-------- 2 files changed, 1 insertion(+), 12 deletions(-)
diff --git a/drivers/staging/fbtft/fb_ssd1351.c b/drivers/staging/fbtft/fb_ssd1351.c index cf263a58a148..6fd549a424d5 100644 --- a/drivers/staging/fbtft/fb_ssd1351.c +++ b/drivers/staging/fbtft/fb_ssd1351.c @@ -187,7 +187,6 @@ static struct fbtft_display display = { }, };
-#ifdef CONFIG_FB_BACKLIGHT static int update_onboard_backlight(struct backlight_device *bd) { struct fbtft_par *par = bl_get_data(bd); @@ -231,9 +230,6 @@ static void register_onboard_backlight(struct fbtft_par *par) if (!par->fbtftops.unregister_backlight) par->fbtftops.unregister_backlight = fbtft_unregister_backlight; } -#else -static void register_onboard_backlight(struct fbtft_par *par) { }; -#endif
FBTFT_REGISTER_DRIVER(DRVNAME, "solomon,ssd1351", &display);
diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c index 3723269890d5..d0c8d85f3db0 100644 --- a/drivers/staging/fbtft/fbtft-core.c +++ b/drivers/staging/fbtft/fbtft-core.c @@ -128,7 +128,6 @@ static int fbtft_request_gpios(struct fbtft_par *par) return 0; }
-#ifdef CONFIG_FB_BACKLIGHT static int fbtft_backlight_update_status(struct backlight_device *bd) { struct fbtft_par *par = bl_get_data(bd); @@ -161,6 +160,7 @@ void fbtft_unregister_backlight(struct fbtft_par *par) par->info->bl_dev = NULL; } } +EXPORT_SYMBOL(fbtft_unregister_backlight);
static const struct backlight_ops fbtft_bl_ops = { .get_brightness = fbtft_backlight_get_brightness, @@ -198,12 +198,7 @@ void fbtft_register_backlight(struct fbtft_par *par) if (!par->fbtftops.unregister_backlight) par->fbtftops.unregister_backlight = fbtft_unregister_backlight; } -#else -void fbtft_register_backlight(struct fbtft_par *par) { }; -void fbtft_unregister_backlight(struct fbtft_par *par) { }; -#endif EXPORT_SYMBOL(fbtft_register_backlight); -EXPORT_SYMBOL(fbtft_unregister_backlight);
static void fbtft_set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) @@ -853,13 +848,11 @@ int fbtft_register_framebuffer(struct fb_info *fb_info) fb_info->fix.smem_len >> 10, text1, HZ / fb_info->fbdefio->delay, text2);
-#ifdef CONFIG_FB_BACKLIGHT /* Turn on backlight if available */ if (fb_info->bl_dev) { fb_info->bl_dev->props.power = FB_BLANK_UNBLANK; fb_info->bl_dev->ops->update_status(fb_info->bl_dev); } -#endif
return 0;