drm/vc4: Add a mode for using the closed firmware for display.

Signed-off-by: Eric Anholt <eric@anholt.net>

drivers/gpu/drm/vc4/Makefile

@@ -8,6 +8,7 @@ vc4-y := \
 	vc4_crtc.o \
 	vc4_drv.o \
 	vc4_dpi.o \
+	vc4_firmware_kms.o \
 	vc4_kms.o \
 	vc4_gem.o \
 	vc4_hdmi.o \

drivers/gpu/drm/vc4/vc4_crtc.c

@@ -163,6 +163,9 @@ int vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id,
 	int vblank_lines;
 	int ret = 0;
 
+	if (vc4->firmware_kms)
+		return 0;
+
 	/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
 
 	/* Get optional system timestamp before query. */
@@ -656,6 +659,11 @@ int vc4_enable_vblank(struct drm_device *dev, unsigned int crtc_id)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
 
+	if (vc4->firmware_kms) {
+		/* XXX: Can we mask the SMI interrupt? */
+		return 0;
+	}
+
 	CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
 
 	return 0;
@@ -666,6 +674,11 @@ void vc4_disable_vblank(struct drm_device *dev, unsigned int crtc_id)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
 
+	if (vc4->firmware_kms) {
+		/* XXX: Can we mask the SMI interrupt? */
+		return;
+	}
+
 	CRTC_WRITE(PV_INTEN, 0);
 }
 

drivers/gpu/drm/vc4/vc4_drv.c

@@ -292,6 +292,7 @@ static struct platform_driver *const component_drivers[] = {
 	&vc4_dpi_driver,
 	&vc4_hvs_driver,
 	&vc4_crtc_driver,
+	&vc4_firmware_kms_driver,
 	&vc4_v3d_driver,
 };
 

drivers/gpu/drm/vc4/vc4_drv.h

@@ -12,6 +12,9 @@
 struct vc4_dev {
 	struct drm_device *dev;
 
+	bool firmware_kms;
+	struct rpi_firmware *firmware;
+
 	struct vc4_hdmi *hdmi;
 	struct vc4_hvs *hvs;
 	struct vc4_crtc *crtc[3];
@@ -460,6 +463,10 @@ void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index);
 extern struct platform_driver vc4_dpi_driver;
 int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused);
 
+/* vc4_firmware_kms.c */
+extern struct platform_driver vc4_firmware_kms_driver;
+void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
+
 /* vc4_gem.c */
 void vc4_gem_init(struct drm_device *dev);
 void vc4_gem_destroy(struct drm_device *dev);