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| author | Melchior Franz <melchior.franz@ginzinger.com> | 2019-04-01 17:46:53 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2019-04-01 17:46:53 +0200 |
| commit | 767f17a70e5cc5147ddba112977fe7bed0a31bd2 (patch) | |
| tree | 6b564d539b3f0a5e4d5fccfed0a2fcb5d2501b76 /drivers/video | |
| parent | df7686101956929dcea410971656e34926773b88 (diff) | |
| download | linux-767f17a70e5cc5147ddba112977fe7bed0a31bd2.tar.gz linux-767f17a70e5cc5147ddba112977fe7bed0a31bd2.tar.bz2 linux-767f17a70e5cc5147ddba112977fe7bed0a31bd2.zip | |
fbdev: mxsfb: implement FB_PRE_INIT_FB option
The FB_PRE_INIT_FB option keeps the kernel from reinitializing the display
and prevents flickering during the transition from a bootloader splash
screen to the kernel logo screen.
Make this option available for the mxsfb driver.
Signed-off-by: Melchior Franz <melchior.franz@ginzinger.com>
Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
Signed-off-by: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/video/fbdev/mxsfb.c | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index 58a9590c9db6..0e7ab29c9c70 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -2183,7 +2183,7 @@ config FB_EP93XX config FB_PRE_INIT_FB bool "Don't reinitialize, use bootloader's GDC/Display configuration" - depends on FB && FB_MB862XX_LIME + depends on FB && (FB_MB862XX_LIME || FB_MXS) ---help--- Select this option if display contents should be inherited as set by the bootloader. diff --git a/drivers/video/fbdev/mxsfb.c b/drivers/video/fbdev/mxsfb.c index 12c8bd1d24d5..a017200a16b3 100644 --- a/drivers/video/fbdev/mxsfb.c +++ b/drivers/video/fbdev/mxsfb.c @@ -181,6 +181,7 @@ struct mxsfb_info { const struct mxsfb_devdata *devdata; u32 sync; struct regulator *reg_lcd; + int pre_init; }; #define mxsfb_is_v3(host) (host->devdata->ipversion == 3) @@ -419,6 +420,12 @@ static int mxsfb_set_par(struct fb_info *fb_info) fb_info->fix.line_length = line_size; + if (host->pre_init) { + mxsfb_enable_controller(fb_info); + host->pre_init = 0; + return 0; + } + /* * It seems, you can't re-program the controller if it is still running. * This may lead into shifted pictures (FIFO issue?). @@ -931,6 +938,10 @@ static int mxsfb_probe(struct platform_device *pdev) if (IS_ERR(host->reg_lcd)) host->reg_lcd = NULL; +#if defined(CONFIG_FB_PRE_INIT_FB) + host->pre_init = 1; +#endif + fb_info->pseudo_palette = devm_kcalloc(&pdev->dev, 16, sizeof(u32), GFP_KERNEL); if (!fb_info->pseudo_palette) { @@ -963,6 +974,7 @@ static int mxsfb_probe(struct platform_device *pdev) mxsfb_enable_controller(fb_info); } + host->pre_init = 0; dev_info(&pdev->dev, "initialized\n"); return 0; |