[src/trunk]: src/sys/arch/arm/acpi Add early fb console support

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/27674977f001
branches:  trunk
changeset: 457933:27674977f001
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Wed Jul 24 19:37:52 2019 +0000

description:
Add early fb console support

diffstat:

 sys/arch/arm/acpi/acpi_platform.c |  122 +++++++++++++++++++++++++++++++++++++-
 1 files changed, 120 insertions(+), 2 deletions(-)

diffs (161 lines):

diff -r 6a15271e534d -r 27674977f001 sys/arch/arm/acpi/acpi_platform.c
--- a/sys/arch/arm/acpi/acpi_platform.c Wed Jul 24 19:33:35 2019 +0000
+++ b/sys/arch/arm/acpi/acpi_platform.c Wed Jul 24 19:37:52 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_platform.c,v 1.14 2019/06/22 19:47:27 jmcneill Exp $ */
+/* $NetBSD: acpi_platform.c,v 1.15 2019/07/24 19:37:52 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -31,11 +31,13 @@
 
 #include "com.h"
 #include "plcom.h"
+#include "wsdisplay.h"
+#include "genfb.h"
 #include "opt_efi.h"
 #include "opt_multiprocessor.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.14 2019/06/22 19:47:27 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.15 2019/07/24 19:37:52 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -71,6 +73,14 @@
 #include <dev/pci/pucvar.h>
 #endif
 
+#if NWSDISPLAY > 0
+#include <dev/wscons/wsconsio.h>
+#include <dev/wscons/wsdisplayvar.h>
+#include <dev/rasops/rasops.h>
+#include <dev/wsfont/wsfont.h>
+#include <dev/wscons/wsdisplay_vconsvar.h>
+#endif
+
 #ifdef EFI_RUNTIME
 #include <arm/arm/efi_runtime.h>
 #endif
@@ -124,6 +134,107 @@
        acpi_coherent_dma_tag._nranges = __arraycount(acpi_coherent_ranges);
 }
 
+#if NWSDISPLAY > 0 && NGENFB > 0
+static struct wsscreen_descr acpi_platform_stdscreen = {
+       .name = "std",
+       .ncols = 0,
+       .nrows = 0,
+       .textops = NULL,
+       .fontwidth = 0,
+       .fontheight = 0,
+       .capabilities = 0,
+       .modecookie = NULL
+};
+
+static struct vcons_screen acpi_platform_screen;
+
+static int
+acpi_platform_find_simplefb(void)
+{
+       static const char * simplefb_compatible[] = { "simple-framebuffer", NULL };
+       int chosen_phandle, child;
+
+       chosen_phandle = OF_finddevice("/chosen");
+       if (chosen_phandle == -1)
+               return -1;
+
+       for (child = OF_child(chosen_phandle); child; child = OF_peer(child)) {
+               if (!fdtbus_status_okay(child))
+                       continue;
+               if (!of_match_compatible(child, simplefb_compatible))
+                       continue;
+
+               return child;
+       }
+
+       return -1;
+}
+
+static void
+acpi_platform_wsdisplay_preattach(void)
+{
+       struct rasops_info *ri = &acpi_platform_screen.scr_ri;
+       bus_space_tag_t bst = &arm_generic_bs_tag;
+       bus_space_handle_t bsh;
+       uint32_t width, height, stride;
+       const char *format;
+       bus_addr_t addr;
+       bus_size_t size;
+       uint16_t depth;
+       long defattr;
+
+       memset(&acpi_platform_screen, 0, sizeof(acpi_platform_screen));
+
+       const int phandle = acpi_platform_find_simplefb();
+       if (phandle == -1)
+               return;
+
+       if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0 || size == 0)
+               return;
+
+       if (of_getprop_uint32(phandle, "width", &width) != 0 ||
+           of_getprop_uint32(phandle, "height", &height) != 0 ||
+           of_getprop_uint32(phandle, "stride", &stride) != 0 ||
+           (format = fdtbus_get_string(phandle, "format")) == NULL)
+               return;
+
+       if (strcmp(format, "a8b8g8r8") == 0 ||
+           strcmp(format, "x8r8g8b8") == 0) {
+               depth = 32;
+       } else if (strcmp(format, "r5g6b5") == 0) {
+               depth = 16;
+       } else {
+               return;
+       }
+
+       if (bus_space_map(bst, addr, size,
+           BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &bsh) != 0)
+               return;
+
+       wsfont_init();
+
+       ri->ri_width = width;
+       ri->ri_height = height;
+       ri->ri_depth = depth;
+       ri->ri_stride = stride;
+       ri->ri_bits = bus_space_vaddr(bst, bsh);
+       ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_CLEAR;
+       rasops_init(ri, ri->ri_height / 8, ri->ri_width / 8);
+       ri->ri_caps = WSSCREEN_WSCOLORS;
+       rasops_reconfig(ri, ri->ri_height / ri->ri_font->fontheight,
+           ri->ri_width / ri->ri_font->fontwidth);
+
+       acpi_platform_stdscreen.nrows = ri->ri_rows;
+       acpi_platform_stdscreen.ncols = ri->ri_cols;
+       acpi_platform_stdscreen.textops = &ri->ri_ops;
+       acpi_platform_stdscreen.capabilities = ri->ri_caps;
+
+       ri->ri_ops.allocattr(ri, 0, 0, 0, &defattr);
+
+       wsdisplay_preattach(&acpi_platform_stdscreen, ri, 0, 0, defattr);
+}
+#endif
+
 static void
 acpi_platform_startup(void)
 {
@@ -203,6 +314,13 @@
        }
 
        /*
+        * Setup framebuffer console, if present.
+        */
+#if NWSDISPLAY > 0 && NGENFB > 0
+       acpi_platform_wsdisplay_preattach();
+#endif
+
+       /*
         * Initialize PSCI 0.2+ if implemented
         */
        if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) {