brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 280 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0520-drm-vc4-Add-support-for-multiple-displays-to-fkms.patch b/target/linux/bcm27xx/patches-4.19/950-0520-drm-vc4-Add-support-for-multiple-displays-to-fkms.patch
new file mode 100644
index 0000000000..06f8cf4148
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0520-drm-vc4-Add-support-for-multiple-displays-to-fkms.patch
@@ -0,0 +1,280 @@
+From 4817db177a74ac58671e1fe84d98d584375d9697 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Wed, 3 Apr 2019 17:15:45 +0100
+Subject: [PATCH] drm: vc4: Add support for multiple displays to fkms
+
+There is a slightly nasty hack in that all crtcs share the
+same SMI interrupt from the firmware. This seems to currently
+work well enough, but ought to be fixed at a later date.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 160 +++++++++++++++++--------
+ 1 file changed, 113 insertions(+), 47 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -29,6 +29,8 @@
+ #include "vc_image_types.h"
+ #include <soc/bcm2835/raspberrypi-firmware.h>
+ 
++#define PLANES_PER_CRTC		3
++
+ struct set_plane {
+ 	u8 display;
+ 	u8 plane_id;
+@@ -175,6 +177,7 @@ struct vc4_crtc {
+ 	struct drm_pending_vblank_event *event;
+ 	u32 overscan[4];
+ 	bool vblank_enabled;
++	u32 display_number;
+ };
+ 
+ static inline struct vc4_crtc *to_vc4_crtc(struct drm_crtc *crtc)
+@@ -480,6 +483,7 @@ static const struct drm_plane_helper_fun
+ 
+ static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev,
+ 					     enum drm_plane_type type,
++					     u8 display_num,
+ 					     u8 plane_id)
+ {
+ 	struct drm_plane *plane = NULL;
+@@ -543,7 +547,7 @@ static struct drm_plane *vc4_fkms_plane_
+ 	vc4_plane->mb.tag.tag = RPI_FIRMWARE_SET_PLANE;
+ 	vc4_plane->mb.tag.buf_size = sizeof(struct set_plane);
+ 	vc4_plane->mb.tag.req_resp_size = 0;
+-	vc4_plane->mb.plane.display = 0;
++	vc4_plane->mb.plane.display = display_num;
+ 	vc4_plane->mb.plane.plane_id = plane_id;
+ 	vc4_plane->mb.plane.layer = default_zpos ? default_zpos : -127;
+ 
+@@ -630,16 +634,20 @@ static void vc4_crtc_handle_page_flip(st
+ 
+ static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
+ {
+-	struct vc4_crtc *vc4_crtc = data;
+-	u32 stat = readl(vc4_crtc->regs + SMICS);
++	struct vc4_crtc **crtc_list = data;
++	int i;
++	u32 stat = readl(crtc_list[0]->regs + SMICS);
+ 	irqreturn_t ret = IRQ_NONE;
+ 
+ 	if (stat & SMICS_INTERRUPTS) {
+-		writel(0, vc4_crtc->regs + SMICS);
+-		if (vc4_crtc->vblank_enabled)
+-			drm_crtc_handle_vblank(&vc4_crtc->base);
+-		vc4_crtc_handle_page_flip(vc4_crtc);
+-		ret = IRQ_HANDLED;
++		writel(0, crtc_list[0]->regs + SMICS);
++
++		for (i = 0; crtc_list[i]; i++) {
++			if (crtc_list[i]->vblank_enabled)
++				drm_crtc_handle_vblank(&crtc_list[i]->base);
++			vc4_crtc_handle_page_flip(crtc_list[i]);
++			ret = IRQ_HANDLED;
++		}
+ 	}
+ 
+ 	return ret;
+@@ -836,66 +844,55 @@ static const struct drm_encoder_helper_f
+ 	.disable = vc4_fkms_encoder_disable,
+ };
+ 
+-static int vc4_fkms_bind(struct device *dev, struct device *master, void *data)
++static int vc4_fkms_create_screen(struct device *dev, struct drm_device *drm,
++				  int display_idx, int display_ref,
++				  struct vc4_crtc **ret_crtc)
+ {
+-	struct platform_device *pdev = to_platform_device(dev);
+-	struct drm_device *drm = dev_get_drvdata(master);
+ 	struct vc4_dev *vc4 = to_vc4_dev(drm);
+ 	struct vc4_crtc *vc4_crtc;
+ 	struct vc4_fkms_encoder *vc4_encoder;
+ 	struct drm_crtc *crtc;
+ 	struct drm_plane *primary_plane, *overlay_plane, *cursor_plane;
+ 	struct drm_plane *destroy_plane, *temp;
+-	struct device_node *firmware_node;
+ 	u32 blank = 1;
+ 	int ret;
+ 
+-	vc4->firmware_kms = true;
+-
+-	/* firmware kms doesn't have precise a scanoutpos implementation, so
+-	 * we can't do the precise vblank timestamp mode.
+-	 */
+-	drm->driver->get_scanout_position = NULL;
+-	drm->driver->get_vblank_timestamp = NULL;
+-
+ 	vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
+ 	if (!vc4_crtc)
+ 		return -ENOMEM;
+ 	crtc = &vc4_crtc->base;
+ 
+-	firmware_node = of_parse_phandle(dev->of_node, "brcm,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);
+-
+-	/* Map the SMI interrupt reg */
+-	vc4_crtc->regs = vc4_ioremap_regs(pdev, 0);
+-	if (IS_ERR(vc4_crtc->regs))
+-		return PTR_ERR(vc4_crtc->regs);
++	vc4_crtc->display_number = display_ref;
+ 
+ 	/* Blank the firmware provided framebuffer */
+ 	rpi_firmware_property(vc4->firmware,
+ 			      RPI_FIRMWARE_FRAMEBUFFER_BLANK,
+ 			      &blank, sizeof(blank));
+ 
+-	primary_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_PRIMARY, 0);
++	primary_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_PRIMARY,
++					    display_ref,
++					    0 + (display_idx * PLANES_PER_CRTC)
++					   );
+ 	if (IS_ERR(primary_plane)) {
+ 		dev_err(dev, "failed to construct primary plane\n");
+ 		ret = PTR_ERR(primary_plane);
+ 		goto err;
+ 	}
+ 
+-	overlay_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_OVERLAY, 1);
++	overlay_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_OVERLAY,
++					    display_ref,
++					    1 + (display_idx * PLANES_PER_CRTC)
++					   );
+ 	if (IS_ERR(overlay_plane)) {
+ 		dev_err(dev, "failed to construct overlay plane\n");
+ 		ret = PTR_ERR(overlay_plane);
+ 		goto err;
+ 	}
+ 
+-	cursor_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_CURSOR, 2);
++	cursor_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_CURSOR,
++					   display_ref,
++					   2 + (display_idx * PLANES_PER_CRTC)
++					  );
+ 	if (IS_ERR(cursor_plane)) {
+ 		dev_err(dev, "failed to construct cursor plane\n");
+ 		ret = PTR_ERR(cursor_plane);
+@@ -922,13 +919,6 @@ static int vc4_fkms_bind(struct device *
+ 		goto err_destroy_encoder;
+ 	}
+ 
+-	writel(0, vc4_crtc->regs + SMICS);
+-	ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
+-			       vc4_crtc_irq_handler, 0, "vc4 firmware kms",
+-			       vc4_crtc);
+-	if (ret)
+-		goto err_destroy_connector;
+-
+ 	ret = rpi_firmware_property(vc4->firmware,
+ 				    RPI_FIRMWARE_FRAMEBUFFER_GET_OVERSCAN,
+ 				    &vc4_crtc->overscan,
+@@ -938,7 +928,7 @@ static int vc4_fkms_bind(struct device *
+ 		memset(&vc4_crtc->overscan, 0, sizeof(vc4_crtc->overscan));
+ 	}
+ 
+-	platform_set_drvdata(pdev, vc4_crtc);
++	*ret_crtc = vc4_crtc;
+ 
+ 	return 0;
+ 
+@@ -955,15 +945,91 @@ err:
+ 	return ret;
+ }
+ 
++static int vc4_fkms_bind(struct device *dev, struct device *master, void *data)
++{
++	struct platform_device *pdev = to_platform_device(dev);
++	struct drm_device *drm = dev_get_drvdata(master);
++	struct vc4_dev *vc4 = to_vc4_dev(drm);
++	struct device_node *firmware_node;
++	struct vc4_crtc **crtc_list;
++	u32 num_displays, display_num;
++	int ret;
++	const u32 display_num_lookup[] = {2, 7, 1};
++
++	vc4->firmware_kms = true;
++
++	/* firmware kms doesn't have precise a scanoutpos implementation, so
++	 * we can't do the precise vblank timestamp mode.
++	 */
++	drm->driver->get_scanout_position = NULL;
++	drm->driver->get_vblank_timestamp = NULL;
++
++	firmware_node = of_parse_phandle(dev->of_node, "brcm,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);
++
++	ret = rpi_firmware_property(vc4->firmware,
++				    RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS,
++				    &num_displays, sizeof(u32));
++
++	/* If we fail to get the number of displays, or it returns 0, then
++	 * assume old firmware that doesn't have the mailbox call, so just
++	 * set one display
++	 */
++	if (ret || num_displays == 0) {
++		num_displays = 1;
++		DRM_WARN("Unable to determine number of displays's. Assuming 1\n");
++		ret = 0;
++	}
++
++	/* Allocate a list, with space for a NULL on the end */
++	crtc_list = devm_kzalloc(dev, sizeof(crtc_list) * (num_displays + 1),
++				 GFP_KERNEL);
++	if (!crtc_list)
++		return -ENOMEM;
++
++	for (display_num = 0; display_num < num_displays; display_num++) {
++		ret = vc4_fkms_create_screen(dev, drm, display_num,
++					     display_num_lookup[display_num],
++					     &crtc_list[display_num]);
++		if (ret)
++			DRM_ERROR("Oh dear, failed to create display %u\n",
++				  display_num);
++	}
++
++	/* Map the SMI interrupt reg */
++	crtc_list[0]->regs = vc4_ioremap_regs(pdev, 0);
++	if (IS_ERR(crtc_list[0]->regs))
++		DRM_ERROR("Oh dear, failed to map registers\n");
++
++	writel(0, crtc_list[0]->regs + SMICS);
++	ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
++			       vc4_crtc_irq_handler, 0, "vc4 firmware kms",
++			       crtc_list);
++	if (ret)
++		DRM_ERROR("Oh dear, failed to register IRQ\n");
++
++	platform_set_drvdata(pdev, crtc_list);
++
++	return 0;
++}
++
+ static void vc4_fkms_unbind(struct device *dev, struct device *master,
+ 			    void *data)
+ {
+ 	struct platform_device *pdev = to_platform_device(dev);
+-	struct vc4_crtc *vc4_crtc = dev_get_drvdata(dev);
++	struct vc4_crtc **crtc_list = dev_get_drvdata(dev);
++	int i;
+ 
+-	vc4_fkms_connector_destroy(vc4_crtc->connector);
+-	vc4_fkms_encoder_destroy(vc4_crtc->encoder);
+-	drm_crtc_cleanup(&vc4_crtc->base);
++	for (i = 0; crtc_list[i]; i++) {
++		vc4_fkms_connector_destroy(crtc_list[i]->connector);
++		vc4_fkms_encoder_destroy(crtc_list[i]->encoder);
++		drm_crtc_cleanup(&crtc_list[i]->base);
++	}
+ 
+ 	platform_set_drvdata(pdev, NULL);
+ }