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Message-ID: <20241024104654.3483125-1-dario.binacchi@amarulasolutions.com>
Date: Thu, 24 Oct 2024 12:46:49 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
Dario Binacchi <dario.binacchi@...rulasolutions.com>,
Michael Trimarchi <michael@...rulasolutions.com>,
David Airlie <airlied@...il.com>,
Fabio Estevam <festevam@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Marek Vasut <marex@...x.de>,
Maxime Ripard <mripard@...nel.org>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Sascha Hauer <s.hauer@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
Simona Vetter <simona@...ll.ch>,
Stefan Agner <stefan@...er.ch>,
Thomas Zimmermann <tzimmermann@...e.de>,
dri-devel@...ts.freedesktop.org,
imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] drm/mxsfb: Remove generic DRM drivers in probe function
Use aperture helpers to remove all generic graphics drivers before
loading mxsfb. Makes mxsfb compatible with simpledrm.
Co-developed-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
index cb5ce4e81fc7..a8d6dffcd02c 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -17,6 +17,7 @@
#include <linux/property.h>
#include <linux/pm_runtime.h>
+#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_connector.h>
@@ -360,6 +361,15 @@ static int mxsfb_probe(struct platform_device *pdev)
if (ret)
goto err_free;
+ /*
+ * Remove early framebuffers (ie. simplefb). The framebuffer can be
+ * located anywhere in RAM
+ */
+ ret = drm_aperture_remove_framebuffers(&mxsfb_driver);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "can't kick out existing framebuffers\n");
+
ret = drm_dev_register(drm, 0);
if (ret)
goto err_unload;
--
2.43.0
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