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, 85 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0575-drm-vc4-Add-status-of-which-display-is-updated-throu.patch b/target/linux/bcm27xx/patches-4.19/950-0575-drm-vc4-Add-status-of-which-display-is-updated-throu.patch
new file mode 100644
index 0000000000..dd5b284ccd
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0575-drm-vc4-Add-status-of-which-display-is-updated-throu.patch
@@ -0,0 +1,85 @@
+From 77ae227664bc2460a5341be765044d0b8fb184ac Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Tue, 4 Jun 2019 12:14:30 +0100
+Subject: [PATCH] drm: vc4: Add status of which display is updated
+ through vblank
+
+Previously multiple  displays were slaved off the same SMI
+interrupt, triggered by HVS channel 1 (HDMI0).
+This doesn't work if you only have a DPI or DSI screen (HVS channel
+0), and gives slightly erroneous results with dual HDMI as the
+events for HDMI1 are incorrect.
+
+Use SMIDSW0 and SMIDSW1 registers to denote which display has
+triggered the vblank.
+Handling should be backwards compatible with older firmware.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 41 ++++++++++++++++++++++----
+ 1 file changed, 36 insertions(+), 5 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -230,8 +230,13 @@ static const struct vc_image_format *vc4
+  * hardware, which has only this one register.
+  */
+ #define SMICS 0x0
++#define SMIDSW0 0x14
++#define SMIDSW1 0x1C
+ #define SMICS_INTERRUPTS (BIT(9) | BIT(10) | BIT(11))
+ 
++/* Flag to denote that the firmware is giving multiple display callbacks */
++#define SMI_NEW 0xabcd0000
++
+ #define vc4_crtc vc4_kms_crtc
+ #define to_vc4_crtc to_vc4_kms_crtc
+ struct vc4_crtc {
+@@ -884,16 +889,42 @@ static irqreturn_t vc4_crtc_irq_handler(
+ 	int i;
+ 	u32 stat = readl(crtc_list[0]->regs + SMICS);
+ 	irqreturn_t ret = IRQ_NONE;
++	u32 chan;
+ 
+ 	if (stat & SMICS_INTERRUPTS) {
+ 		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;
++		chan = readl(crtc_list[0]->regs + SMIDSW0);
++
++		if ((chan & 0xFFFF0000) != SMI_NEW) {
++			/* Older firmware. Treat the one interrupt as vblank/
++			 * complete for all crtcs.
++			 */
++			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]);
++			}
++		} else {
++			if (chan & 1) {
++				writel(SMI_NEW, crtc_list[0]->regs + SMIDSW0);
++				if (crtc_list[0]->vblank_enabled)
++					drm_crtc_handle_vblank(&crtc_list[0]->base);
++				vc4_crtc_handle_page_flip(crtc_list[0]);
++			}
++
++			/* Check for the secondary display too */
++			chan = readl(crtc_list[0]->regs + SMIDSW1);
++
++			if (chan & 1) {
++				writel(SMI_NEW, crtc_list[0]->regs + SMIDSW1);
++				if (crtc_list[1]->vblank_enabled)
++					drm_crtc_handle_vblank(&crtc_list[1]->base);
++				vc4_crtc_handle_page_flip(crtc_list[1]);
++			}
+ 		}
++
++		ret = IRQ_HANDLED;
+ 	}
+ 
+ 	return ret;