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https://github.com/Ysurac/openmptcprouter.git
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61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
From 8bea3757609023df7873b52e670ee47a479b109c Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Wed, 23 Jun 2021 11:54:58 +0200
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Subject: [PATCH 499/552] drm/vc4: Notify the firmware when DRM is in charge
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Once the call to drm_fb_helper_remove_conflicting_framebuffers() has
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been made, simplefb has been unregistered and the KMS driver is entirely
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in charge of the display.
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Thus, we can notify the firmware it can free whatever resource it was
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using to maintain simplefb functional.
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_drv.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
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index 752f05701289..8d63658d630d 100644
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--- a/drivers/gpu/drm/vc4/vc4_drv.c
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+++ b/drivers/gpu/drm/vc4/vc4_drv.c
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@@ -37,6 +37,8 @@
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_vblank.h>
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+#include <soc/bcm2835/raspberrypi-firmware.h>
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+
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#include "uapi/drm/vc4_drm.h"
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#include "vc4_drv.h"
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@@ -277,10 +279,27 @@ static int vc4_drm_bind(struct device *dev)
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if (ret)
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return ret;
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+ node = of_parse_phandle(dev->of_node, "raspberrypi,firmware", 0);
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+ if (node) {
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+ vc4->firmware = rpi_firmware_get(node);
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+ of_node_put(node);
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+
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+ if (!vc4->firmware)
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+ return -EPROBE_DEFER;
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+ }
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+
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ret = drm_aperture_remove_framebuffers(false, "vc4drmfb");
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if (ret)
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goto unbind_all;
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+ if (vc4->firmware) {
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+ ret = rpi_firmware_property(vc4->firmware,
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+ RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
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+ NULL, 0);
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+ if (ret)
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+ drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
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+ }
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+
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ret = component_bind_all(dev, drm);
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if (ret)
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return ret;
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--
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2.33.0
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