summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/vc4/vc4_drv.c
diff options
context:
space:
mode:
authorMaxime Ripard <maxime@cerno.tech>2021-12-15 12:51:17 +0300
committerMaxime Ripard <maxime@cerno.tech>2022-01-11 15:16:12 +0300
commitc406ad5e4a851c510c94189d608f255796122047 (patch)
tree6325f2418fa45b0cd61058ed24091b2f19dda620 /drivers/gpu/drm/vc4/vc4_drv.c
parenta7e6f3d8a41e6b396bf06ad8f7ea5bca46cb2101 (diff)
downloadlinux-c406ad5e4a851c510c94189d608f255796122047.tar.xz
drm/vc4: Notify the firmware when DRM is in charge
Once the call to drm_fb_helper_remove_conflicting_framebuffers() has been made, simplefb has been unregistered and the KMS driver is entirely in charge of the display. Thus, we can notify the firmware it can free whatever resource it was using to maintain simplefb functional. Signed-off-by: Maxime Ripard <maxime@cerno.tech> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20211215095117.176435-5-maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_drv.c')
-rw-r--r--drivers/gpu/drm/vc4/vc4_drv.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 86c61ee120b7..a03053c8e22c 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -37,6 +37,8 @@
#include <drm/drm_fb_helper.h>
#include <drm/drm_vblank.h>
+#include <soc/bcm2835/raspberrypi-firmware.h>
+
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
@@ -215,6 +217,7 @@ static void vc4_match_add_drivers(struct device *dev,
static int vc4_drm_bind(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
+ struct rpi_firmware *firmware = NULL;
struct drm_device *drm;
struct vc4_dev *vc4;
struct device_node *node;
@@ -251,10 +254,29 @@ static int vc4_drm_bind(struct device *dev)
if (ret)
return ret;
+ node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
+ if (node) {
+ firmware = rpi_firmware_get(node);
+ of_node_put(node);
+
+ if (!firmware)
+ return -EPROBE_DEFER;
+ }
+
ret = drm_aperture_remove_framebuffers(false, &vc4_drm_driver);
if (ret)
return ret;
+ if (firmware) {
+ ret = rpi_firmware_property(firmware,
+ RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
+ NULL, 0);
+ if (ret)
+ drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
+
+ rpi_firmware_put(firmware);
+ }
+
ret = component_bind_all(dev, drm);
if (ret)
return ret;