[PATCH] drm/rockchip: kick firmware-based framebuffer when initializing

[PATCH] drm/rockchip: kick firmware-based framebuffer when initializing

[Icenowy Zheng]

Since U-Boot now supports EFI and FB passing via EFI GOP, when booting
rockchip SoCs via EFI, a EFI FB is available. However, currently when
re-initializing display pipeline, the EFI FB is not removed, lead to
fbcon not working (because the EFI FB is no longer bound to the display
pipeline although it's still /dev/fb0 and fbcon is bound to it).

Add some code for removing firmware-based FB when initializing KMS of
rockchipdrm.

Tested on Pinebook Pro (RK3399) with U-Boot patchset for initializing
eDP display applied.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 212bd87c0c4a..3905fce6ce0b 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -158,6 +158,9 @@ static int rockchip_drm_bind(struct device *dev)
 	 */
 	drm_dev->irq_enabled = true;
 
+	/* Remove early framebuffers (ie. efifb) */
+	drm_fb_helper_remove_conflicting_framebuffers(NULL, "rockchipdrmfb", false);
+
 	ret = rockchip_drm_fbdev_init(drm_dev);
 	if (ret)
 		goto err_unbind_all;
-- 
2.30.2

Re: [PATCH] drm/rockchip: kick firmware-based framebuffer when initializing

[Thomas Zimmermann]

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Hi

I think we already fixed this at [1]. Apparently no on epicked it up. If 
you awant to test, I'll add your Tested-by before merging the patch.

Best regards
Thomas

[1] 
https://lore.kernel.org/dri-devel/20210516074833.451643-1-javierm@redhat.com/

Am 26.05.21 um 10:55 schrieb Icenowy Zheng:
> Since U-Boot now supports EFI and FB passing via EFI GOP, when booting
> rockchip SoCs via EFI, a EFI FB is available. However, currently when
> re-initializing display pipeline, the EFI FB is not removed, lead to
> fbcon not working (because the EFI FB is no longer bound to the display
> pipeline although it's still /dev/fb0 and fbcon is bound to it).
> 
> Add some code for removing firmware-based FB when initializing KMS of
> rockchipdrm.
> 
> Tested on Pinebook Pro (RK3399) with U-Boot patchset for initializing
> eDP display applied.
> 
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> ---
>   drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index 212bd87c0c4a..3905fce6ce0b 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -158,6 +158,9 @@ static int rockchip_drm_bind(struct device *dev)
>   	 */
>   	drm_dev->irq_enabled = true;
>   
> +	/* Remove early framebuffers (ie. efifb) */
> +	drm_fb_helper_remove_conflicting_framebuffers(NULL, "rockchipdrmfb", false);
> +
>   	ret = rockchip_drm_fbdev_init(drm_dev);
>   	if (ret)
>   		goto err_unbind_all;
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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