drm/vc4: Convert from firmware calls to using a generic power domain.

This lets the firmware interaction get taken care of by a
firmware-specific driver.  Other V3D implementations wouldn't depend
on raspberry pi firmware.

Signed-off-by: Eric Anholt <[email protected]>

Author: anholt

drivers/gpu/drm/vc4/vc4_drv.c

@@ -14,7 +14,6 @@
 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
-#include <soc/bcm2835/raspberrypi-firmware.h>
 #include "drm_fb_cma_helper.h"
 
 #include "uapi/drm/vc4_drm.h"
@@ -170,7 +169,6 @@ static int vc4_drm_bind(struct device *dev)
 	struct drm_device *drm;
 	struct drm_connector *connector;
 	struct vc4_dev *vc4;
-	struct device_node *firmware_node;
 	int ret = 0;
 
 	dev->coherent_dma_mask = DMA_BIT_MASK(32);
@@ -179,14 +177,6 @@ static int vc4_drm_bind(struct device *dev)
 	if (!vc4)
 		return -ENOMEM;
 
-	firmware_node = of_parse_phandle(dev->of_node, "firmware", 0);
-	vc4->firmware = rpi_firmware_get(firmware_node);
-	if (!vc4->firmware) {
-		DRM_DEBUG("Failed to get Raspberry Pi firmware reference.\n");
-		return -EPROBE_DEFER;
-	}
-	of_node_put(firmware_node);
-
 	drm = drm_dev_alloc(&vc4_drm_driver, dev);
 	if (!drm)
 		return -ENOMEM;

drivers/gpu/drm/vc4/vc4_drv.h

@@ -18,7 +18,6 @@ struct vc4_dev {
 	struct vc4_v3d *v3d;
 
 	struct drm_fbdev_cma *fbdev;
-	struct rpi_firmware *firmware;
 
 	struct vc4_hang_state *hang_state;
 

drivers/gpu/drm/vc4/vc4_v3d.c

@@ -17,7 +17,6 @@
  */
 
 #include "linux/component.h"
-#include "soc/bcm2835/raspberrypi-firmware.h"
 #include "vc4_drv.h"
 #include "vc4_regs.h"
 
@@ -152,11 +151,10 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 int
 vc4_v3d_set_power(struct vc4_dev *vc4, bool on)
 {
-	u32 packet = on;
-
-	return rpi_firmware_property(vc4->firmware,
-				     RPI_FIRMWARE_SET_ENABLE_QPU,
-				     &packet, sizeof(packet));
+	if (on)
+		return pm_generic_poweroff(&vc4->v3d->pdev->dev);
+	else
+		return pm_generic_resume(&vc4->v3d->pdev->dev);
 }
 
 static void vc4_v3d_init_hw(struct drm_device *dev)
@@ -190,10 +188,6 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
 
 	vc4->v3d = v3d;
 
-	ret = vc4_v3d_set_power(vc4, true);
-	if (ret)
-		return ret;
-
 	if (V3D_READ(V3D_IDENT0) != V3D_EXPECTED_IDENT0) {
 		DRM_ERROR("V3D_IDENT0 read 0x%08x instead of 0x%08x\n",
 			  V3D_READ(V3D_IDENT0), V3D_EXPECTED_IDENT0);
@@ -232,8 +226,6 @@ static void vc4_v3d_unbind(struct device *dev, struct device *master,
 	V3D_WRITE(V3D_BPOA, 0);
 	V3D_WRITE(V3D_BPOS, 0);
 
-	vc4_v3d_set_power(vc4, false);
-
 	vc4->v3d = NULL;
 }