forked from pool/xorg-x11-server
76 lines
2.5 KiB
Diff
76 lines
2.5 KiB
Diff
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From 35540106538b24ca1765e752fe9d6efc968a88fa Mon Sep 17 00:00:00 2001
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From: Egbert Eich <eich@linux-p1mv.site>
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Date: Wed, 7 Oct 2009 16:31:44 +0200
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Subject: [PATCH] Check harder for primary PCI device.
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Primary PCI devices are identified by checking for an 'PCIINFOCLASSES'
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device which is VGA and has access to the memory bars enabled.
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If there should be more than one device for which this is true
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redo the check and also check if IO resoures are also enabled,
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if this still doesn't turn up a unique result also check for
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the presence of a BIOS rom.
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---
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hw/xfree86/common/xf86pciBus.c | 46 +++++++++++++++++++++++++++++++++++++--
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1 files changed, 43 insertions(+), 3 deletions(-)
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diff --git a/hw/xfree86/common/xf86pciBus.c b/hw/xfree86/common/xf86pciBus.c
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index 25b553b..18b9782 100644
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--- a/hw/xfree86/common/xf86pciBus.c
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+++ b/hw/xfree86/common/xf86pciBus.c
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@@ -390,9 +390,49 @@ xf86PciProbe(void)
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primaryBus.type = BUS_PCI;
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primaryBus.id.pci = info;
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} else {
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- xf86Msg(X_NOTICE,
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- "More than one possible primary device found\n");
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- primaryBus.type ^= (BusType)(-1);
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+ /*
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+ * Ok, we found more than one possible primary device with this heuristic
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+ * Now also check if IO is enabled.
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+ */
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+ int j;
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+
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+ primaryBus.type = BUS_NONE;
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+ for (j = 0; j < num; j++) {
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+ info = xf86PciVideoInfo[j];
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+ pci_device_cfg_read_u16(info, & command, 4);
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+
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+ if ((command & PCI_CMD_MEM_ENABLE)
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+ && (command & PCI_CMD_IO_ENABLE)
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+ && (IS_VGA(info->device_class))) {
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+ if (primaryBus.type == BUS_NONE) {
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+ primaryBus.type = BUS_PCI;
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+ primaryBus.id.pci = info;
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+ } else {
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+ primaryBus.type = BUS_NONE;
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+ for (j = 0; j < num; j++) {
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+ info = xf86PciVideoInfo[j];
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+ pci_device_cfg_read_u16(info, & command, 4);
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+
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+ if ((command & PCI_CMD_MEM_ENABLE)
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+ && (command & PCI_CMD_IO_ENABLE)
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+ && (IS_VGA(info->device_class))
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+ && info->rom_size) {
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+ if (primaryBus.type == BUS_NONE) {
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+ primaryBus.type = BUS_PCI;
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+ primaryBus.id.pci = info;
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+ } else {
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+ xf86Msg(X_NOTICE,
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+ "More than one possible primary device found\n");
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+ primaryBus.type ^= (BusType)(-1);
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+ break;
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+ }
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+ }
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+ }
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+ break;
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+ }
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+ }
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+ }
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+ break;
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}
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}
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}
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--
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1.6.4.2
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