[src/trunk]: src/sys/dev/fdt Add another panel@fdt driver, this time for DRM-...

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

details:   https://anonhg.NetBSD.org/src/rev/a88f88faa84a
branches:  trunk
changeset: 847341:a88f88faa84a
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Thu Dec 19 00:35:01 2019 +0000

description:
Add another panel@fdt driver, this time for DRM-style panels.

To do: migrate away from other panel driver.

diffstat:

 sys/dev/fdt/fdt_panel.c |  163 ++++++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/fdt/files.fdt   |    5 +-
 2 files changed, 167 insertions(+), 1 deletions(-)

diffs (186 lines):

diff -r d686b5fc2063 -r a88f88faa84a sys/dev/fdt/fdt_panel.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/fdt_panel.c   Thu Dec 19 00:35:01 2019 +0000
@@ -0,0 +1,163 @@
+/* $NetBSD: fdt_panel.c,v 1.1 2019/12/19 00:35:01 jakllsch Exp $ */
+
+/*-
+ * Copyright (c) 2019 Jonathan A. Kollasch <jakllsch%kollasch.net@localhost>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: fdt_panel.c,v 1.1 2019/12/19 00:35:01 jakllsch Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/gpio.h>
+
+#include <dev/fdt/fdtvar.h>
+#include <dev/fdt/fdt_port.h>
+
+#include <dev/i2c/ddcvar.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_edid.h>
+
+static const char * const compatible[] = {
+       "simple-panel",
+       NULL
+};
+
+struct panel_fdt_softc {
+       device_t                        sc_dev;
+       struct fdt_device_ports         sc_ports;
+       struct drm_panel                sc_panel;
+       struct fdtbus_gpio_pin *        sc_enable;
+       struct fdtbus_regulator *       sc_regulator;
+};
+
+#define        to_panel_fdt(x) container_of(x, struct panel_fdt_softc, sc_panel)
+
+static int
+panel_fdt_enable(struct drm_panel * panel)
+{
+       struct panel_fdt_softc * const sc = to_panel_fdt(panel);
+
+        if (sc->sc_enable) {
+               fdtbus_gpio_write(sc->sc_enable, true);
+        }
+
+       if (!cold)
+               kpause("panele", false, mstohz(200), NULL);
+
+       return 0;
+}
+
+static int
+panel_fdt_prepare(struct drm_panel * panel)
+{
+       struct panel_fdt_softc * const sc = to_panel_fdt(panel);
+
+        if (sc->sc_regulator) {
+                fdtbus_regulator_enable(sc->sc_regulator);
+        }
+
+       if (cold)
+               delay(210000);
+       else
+               kpause("panelp", false, mstohz(210), NULL);
+
+       return 0;
+}
+
+static const struct drm_panel_funcs panel_fdt_funcs = {
+       .disable = NULL,
+       .enable = panel_fdt_enable,
+       .get_modes = NULL,
+       .get_timings = NULL,
+       .prepare = panel_fdt_prepare,
+       .unprepare = NULL,
+};
+
+static int
+panel_fdt_ep_activate(device_t dev, struct fdt_endpoint *ep, bool activate)
+{
+       struct fdt_endpoint *rep = fdt_endpoint_remote(ep);
+
+       if (fdt_endpoint_port_index(ep) != 0)
+               return EINVAL;
+
+       if (fdt_endpoint_type(rep) != EP_DRM_ENCODER)
+               return EINVAL;
+
+       return 0;
+}
+
+static void *
+panel_fdt_ep_get_data(device_t dev, struct fdt_endpoint *ep)
+{
+       struct panel_fdt_softc * const sc = device_private(dev);
+
+       return &sc->sc_panel;
+}
+
+static int
+panel_fdt_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct fdt_attach_args * const faa = aux;
+
+       return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+panel_fdt_attach(device_t parent, device_t self, void *aux)
+{
+       struct panel_fdt_softc * const sc = device_private(self);
+       struct fdt_attach_args * const faa = aux;
+       const int phandle = faa->faa_phandle;
+
+       aprint_naive("\n");
+       aprint_normal(": panel\n");
+
+       sc->sc_dev = self;
+
+       /* required for "simple-panel" */
+        sc->sc_regulator = fdtbus_regulator_acquire(phandle, "power-supply");
+
+       /* optional for "simple-panel" */
+       sc->sc_enable = fdtbus_gpio_acquire_index(phandle,
+           "enable-gpios", 0, GPIO_PIN_OUTPUT);
+
+       sc->sc_ports.dp_ep_activate = panel_fdt_ep_activate;
+       sc->sc_ports.dp_ep_get_data = panel_fdt_ep_get_data;
+       fdt_ports_register(&sc->sc_ports, self, phandle, EP_DRM_PANEL);
+
+       drm_panel_init(&sc->sc_panel);
+       sc->sc_panel.funcs = &panel_fdt_funcs;
+
+       drm_panel_add(&sc->sc_panel);
+}
+
+CFATTACH_DECL_NEW(panel_fdt, sizeof(struct panel_fdt_softc),
+       panel_fdt_match, panel_fdt_attach, NULL, NULL);
diff -r d686b5fc2063 -r a88f88faa84a sys/dev/fdt/files.fdt
--- a/sys/dev/fdt/files.fdt     Thu Dec 19 00:28:34 2019 +0000
+++ b/sys/dev/fdt/files.fdt     Thu Dec 19 00:35:01 2019 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.48 2019/11/17 19:30:42 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.49 2019/12/19 00:35:01 jakllsch Exp $
 
 include        "external/bsd/libfdt/conf/files.libfdt"
 
@@ -45,6 +45,9 @@
 attach panel at fdt with fdt_panel
 file   dev/fdt/panel_fdt.c                     fdt_panel
 
+attach panel at fdt with panel_fdt: drmkms
+file   dev/fdt/fdt_panel.c                     panel_fdt
+
 device dispcon: fdt_port, drmkms, ddc_read_edid
 attach dispcon at fdt with dispcon_hdmi
 file   dev/fdt/hdmi_connector.c                dispcon_hdmi