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

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Date:   Wed, 26 May 2021 14:00:23 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Icenowy Zheng <icenowy@...c.io>, Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/rockchip: kick firmware-based framebuffer when
 initializing

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@...c.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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