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extract physical address from HDMI VDSB and make it available as the "physical-address" device property

This commit is contained in:
jmcneill 2015-07-31 23:07:14 +00:00
parent cd42d5bc1f
commit 70b7b04013
1 changed files with 16 additions and 3 deletions
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19
sys/arch/arm/nvidia/tegra_hdmi.c
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@ -1,4 +1,4 @@
/* $NetBSD: tegra_hdmi.c,v 1.8 2015/07/26 15:12:03 jmcneill Exp $ */
/* $NetBSD: tegra_hdmi.c,v 1.9 2015/07/31 23:07:14 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
@ -29,7 +29,7 @@
#include "locators.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tegra_hdmi.c,v 1.8 2015/07/26 15:12:03 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: tegra_hdmi.c,v 1.9 2015/07/31 23:07:14 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -47,6 +47,8 @@ __KERNEL_RCSID(0, "$NetBSD: tegra_hdmi.c,v 1.8 2015/07/26 15:12:03 jmcneill Exp
#include <arm/nvidia/tegra_hdmireg.h>
#include <arm/nvidia/tegra_var.h>
#define PROP_PHYSICAL_ADDRESS "physical-address"
static int tegra_hdmi_match(device_t, cfdata_t, void *);
static void tegra_hdmi_attach(device_t, device_t, void *);
@ -243,6 +245,9 @@ tegra_hdmi_connect(struct tegra_hdmi_softc *sc)
static void
tegra_hdmi_disconnect(struct tegra_hdmi_softc *sc)
{
prop_dictionary_t cfg = device_properties(sc->sc_dev);
prop_dictionary_remove(cfg, PROP_PHYSICAL_ADDRESS);
}
static void
@ -441,9 +446,11 @@ tegra_hdmi_sor_start(struct tegra_hdmi_softc *sc)
static bool
tegra_hdmi_is_hdmi(struct tegra_hdmi_softc *sc, const struct edid_info *ei)
{
prop_dictionary_t cfg = device_properties(sc->sc_dev);
char edid[128];
bool found_hdmi = false;
unsigned int n, p;
uint16_t phys_addr;
/*
* Scan through extension blocks, looking for a CEA-861-D v3
@ -486,9 +493,15 @@ tegra_hdmi_is_hdmi(struct tegra_hdmi_softc *sc, const struct edid_info *ei)
goto next_block;
/* HDMI 24-bit IEEE registration ID is 0x000C03 */
if (memcmp(&edid[p + 1], "\x03\x0c\x00", 3) == 0)
if (memcmp(&edid[p + 1], "\x03\x0c\x00", 3) == 0) {
found_hdmi = true;
phys_addr = (edid[p + 4] << 8) | edid[p + 5];
prop_dictionary_set_uint16(cfg,
PROP_PHYSICAL_ADDRESS, phys_addr);
}
next_block:
p += (1 + blen);
}