@@ -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"
@@ -251,10 +253,27 @@ static int vc4_drm_bind(struct device *dev)
if (ret)
return ret;
+ node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
+ if (node) {
+ vc4->firmware = devm_rpi_firmware_get(dev, node);
+ of_node_put(node);
+
+ if (!vc4->firmware)
+ return -EPROBE_DEFER;
+ }
+
ret = drm_aperture_remove_framebuffers(false, &vc4_drm_driver);
if (ret)
return ret;
+ if (vc4->firmware) {
+ ret = rpi_firmware_property(vc4->firmware,
+ RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
+ NULL, 0);
+ if (ret)
+ drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
+ }
+
ret = component_bind_all(dev, drm);
if (ret)
return ret;
@@ -76,6 +76,8 @@ struct vc4_dev {
unsigned int irq;
+ struct rpi_firmware *firmware;
+
struct vc4_hvs *hvs;
struct vc4_v3d *v3d;
struct vc4_dpi *dpi;
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> --- drivers/gpu/drm/vc4/vc4_drv.c | 19 +++++++++++++++++++ drivers/gpu/drm/vc4/vc4_drv.h | 2 ++ 2 files changed, 21 insertions(+)