linux-kernel - Re: [PATCH] drm/msm: Transition console to msm framebuffer

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Message-ID: <CAF6AEGuLvgfWYdGm-0caGbWcvzt7raCWkz_sBCxFKV99YQZmeg@mail.gmail.com>
Date:   Sat, 29 Jun 2019 10:46:20 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Cc:     Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/msm: Transition console to msm framebuffer

On Fri, Jun 28, 2019 at 9:28 AM Jeffrey Hugo <jeffrey.l.hugo@...il.com> wrote:
>
> If booting a device using EFI, efifb will likely come up and claim the
> console.  When the msm display stack finally comes up, we want the
> console to move over to the msm fb, so add support to kick out any
> firmware based framebuffers to accomplish the console transition.
>
> Suggested-by: Rob Clark <robdclark@...il.com>
> Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>

lgtm,

Reviewed-by: Rob Clark <robdclark@...il.com>


> ---
>  drivers/gpu/drm/msm/msm_fbdev.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/msm_fbdev.c b/drivers/gpu/drm/msm/msm_fbdev.c
> index 2429d5e6ce9f..e3836c7725a6 100644
> --- a/drivers/gpu/drm/msm/msm_fbdev.c
> +++ b/drivers/gpu/drm/msm/msm_fbdev.c
> @@ -169,6 +169,9 @@ struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
>         if (ret)
>                 goto fini;
>
> +       /* the fw fb could be anywhere in memory */
> +       drm_fb_helper_remove_conflicting_framebuffers(NULL, "msm", false);
> +
>         ret = drm_fb_helper_initial_config(helper, 32);
>         if (ret)
>                 goto fini;
> --
> 2.17.1
>