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

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Date:   Fri, 28 Jun 2019 09:28:31 -0700
From:   Jeffrey Hugo <jeffrey.l.hugo@...il.com>
To:     robdclark@...il.com, sean@...rly.run, airlied@...ux.ie,
        daniel@...ll.ch
Cc:     bjorn.andersson@...aro.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Subject: [PATCH] drm/msm: Transition console to msm framebuffer

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>
---
 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