Add another panel@fdt driver, this time for DRM-style panels.
To do: migrate away from other panel driver.
This commit is contained in:
jakllsch
parent
0343439250
commit
18f2cada68
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/* $NetBSD: fdt_panel.c,v 1.1 2019/12/19 00:35:01 jakllsch Exp $ */
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/*-
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* Copyright (c) 2019 Jonathan A. Kollasch <jakllsch@kollasch.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdt_panel.c,v 1.1 2019/12/19 00:35:01 jakllsch Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/gpio.h>
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#include <dev/fdt/fdtvar.h>
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#include <dev/fdt/fdt_port.h>
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#include <dev/i2c/ddcvar.h>
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#include <drm/drmP.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_edid.h>
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static const char * const compatible[] = {
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"simple-panel",
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NULL
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};
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struct panel_fdt_softc {
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device_t sc_dev;
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struct fdt_device_ports sc_ports;
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struct drm_panel sc_panel;
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struct fdtbus_gpio_pin * sc_enable;
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struct fdtbus_regulator * sc_regulator;
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};
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#define to_panel_fdt(x) container_of(x, struct panel_fdt_softc, sc_panel)
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static int
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panel_fdt_enable(struct drm_panel * panel)
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{
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struct panel_fdt_softc * const sc = to_panel_fdt(panel);
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if (sc->sc_enable) {
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fdtbus_gpio_write(sc->sc_enable, true);
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}
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if (!cold)
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kpause("panele", false, mstohz(200), NULL);
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return 0;
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}
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static int
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panel_fdt_prepare(struct drm_panel * panel)
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{
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struct panel_fdt_softc * const sc = to_panel_fdt(panel);
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if (sc->sc_regulator) {
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fdtbus_regulator_enable(sc->sc_regulator);
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}
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if (cold)
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delay(210000);
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else
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kpause("panelp", false, mstohz(210), NULL);
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return 0;
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}
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static const struct drm_panel_funcs panel_fdt_funcs = {
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.disable = NULL,
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.enable = panel_fdt_enable,
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.get_modes = NULL,
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.get_timings = NULL,
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.prepare = panel_fdt_prepare,
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.unprepare = NULL,
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};
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static int
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panel_fdt_ep_activate(device_t dev, struct fdt_endpoint *ep, bool activate)
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{
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struct fdt_endpoint *rep = fdt_endpoint_remote(ep);
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if (fdt_endpoint_port_index(ep) != 0)
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return EINVAL;
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if (fdt_endpoint_type(rep) != EP_DRM_ENCODER)
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return EINVAL;
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return 0;
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}
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static void *
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panel_fdt_ep_get_data(device_t dev, struct fdt_endpoint *ep)
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{
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struct panel_fdt_softc * const sc = device_private(dev);
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return &sc->sc_panel;
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}
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static int
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panel_fdt_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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return of_match_compatible(faa->faa_phandle, compatible);
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}
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static void
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panel_fdt_attach(device_t parent, device_t self, void *aux)
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{
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struct panel_fdt_softc * const sc = device_private(self);
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struct fdt_attach_args * const faa = aux;
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const int phandle = faa->faa_phandle;
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aprint_naive("\n");
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aprint_normal(": panel\n");
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sc->sc_dev = self;
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/* required for "simple-panel" */
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sc->sc_regulator = fdtbus_regulator_acquire(phandle, "power-supply");
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/* optional for "simple-panel" */
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sc->sc_enable = fdtbus_gpio_acquire_index(phandle,
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"enable-gpios", 0, GPIO_PIN_OUTPUT);
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sc->sc_ports.dp_ep_activate = panel_fdt_ep_activate;
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sc->sc_ports.dp_ep_get_data = panel_fdt_ep_get_data;
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fdt_ports_register(&sc->sc_ports, self, phandle, EP_DRM_PANEL);
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drm_panel_init(&sc->sc_panel);
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sc->sc_panel.funcs = &panel_fdt_funcs;
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drm_panel_add(&sc->sc_panel);
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}
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CFATTACH_DECL_NEW(panel_fdt, sizeof(struct panel_fdt_softc),
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panel_fdt_match, panel_fdt_attach, NULL, NULL);
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@ -1,4 +1,4 @@
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# $NetBSD: files.fdt,v 1.48 2019/11/17 19:30:42 jmcneill Exp $
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# $NetBSD: files.fdt,v 1.49 2019/12/19 00:35:01 jakllsch Exp $
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include "external/bsd/libfdt/conf/files.libfdt"
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@ -45,6 +45,9 @@ device panel: fdt_port
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attach panel at fdt with fdt_panel
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file dev/fdt/panel_fdt.c fdt_panel
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attach panel at fdt with panel_fdt: drmkms
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file dev/fdt/fdt_panel.c panel_fdt
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device dispcon: fdt_port, drmkms, ddc_read_edid
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attach dispcon at fdt with dispcon_hdmi
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file dev/fdt/hdmi_connector.c dispcon_hdmi
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