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Date: Tue, 16 Nov 2010 00:34:00 -0700
From: "Joey Lee" <jlee@...ell.com>
To: <rui.zhang@...el.com>
Cc: <mingo@...e.hu>, <lenb@...nel.org>, <airlied@...hat.com>,
<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] do not select ACPI_VIDEO in poulsbo stub driver
Hi Rui,
Sorry about this patch will not work on my MSi poulsbo machine.
於 二，2010-11-16 於 14:04 +0800，Zhang Rui 提到：
> the poulsbo stub driver should not select ACPI video driver.
>
> The reason why i915 driver selects ACPI video driver is that it needs some
> cooperation between these two drivers during initialization, or else the
> system may hang.
>
> So if users want ACPI backlight control, please set CONFIG_ACPI_VIDEO manually.
>
> http://marc.info/?l=linux-acpi&m=128952659018533&w=2
>
> CC: Ingo Molnar <mingo@...e.hu>
> CC: Dave Airlie <airlied@...hat.com>
> CC: Lee, Chun-Yi <joeyli.kernel@...il.com>
> Signed-off-by: Zhang Rui <rui.zhang@...el.com>
> ---
> drivers/gpu/stub/Kconfig | 11 +----------
> drivers/gpu/stub/poulsbo.c | 5 +----
> 2 files changed, 2 insertions(+), 14 deletions(-)
>
> Index: linux-2.6/drivers/gpu/stub/Kconfig
> ===================================================================
> --- linux-2.6.orig/drivers/gpu/stub/Kconfig
> +++ linux-2.6/drivers/gpu/stub/Kconfig
> @@ -1,16 +1,7 @@
> config STUB_POULSBO
> tristate "Intel GMA500 Stub Driver"
> depends on PCI
> - # Poulsbo stub depends on ACPI_VIDEO when ACPI is enabled
> - # but for select to work, need to select ACPI_VIDEO's dependencies, ick
> - select VIDEO_OUTPUT_CONTROL if ACPI
> - select BACKLIGHT_CLASS_DEVICE if ACPI
> - select INPUT if ACPI
> - select ACPI_VIDEO if ACPI
> help
> Choose this option if you have a system that has Intel GMA500
> (Poulsbo) integrated graphics. If M is selected, the module will
> - be called Poulsbo. This driver is a stub driver for Poulsbo that
> - will call poulsbo.ko to enable the acpi backlight control sysfs
> - entry file because there have no poulsbo native driver can support
> - intel opregion.
> + be called Poulsbo.
> Index: linux-2.6/drivers/gpu/stub/poulsbo.c
> ===================================================================
> --- linux-2.6.orig/drivers/gpu/stub/poulsbo.c
> +++ linux-2.6/drivers/gpu/stub/poulsbo.c
> @@ -11,8 +11,6 @@
>
> #include <linux/module.h>
> #include <linux/pci.h>
> -#include <linux/acpi.h>
> -#include <acpi/video.h>
>
> #define DRIVER_NAME "poulsbo"
>
> @@ -29,12 +27,11 @@ static DEFINE_PCI_DEVICE_TABLE(pciidlist
>
> static int poulsbo_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> {
> - return acpi_video_register();
> + return 0;
> }
Sorry, we cann't remove to call acpi_video_register, because the acpi
video will not generate because there have some poulsbo machine declare
Intel opregion in DSDT but the i915 driver not support poulsbo.
That's why we add the poulsbo stub driver to enable the acpi video
because those machine implement acpi _BCL, _BCM interace and control
brightness by ec.
Here is our discussion:
http://www.spinics.net/lists/linux-acpi/msg30027.html
>
> static void poulsbo_remove(struct pci_dev *pdev)
> {
> - acpi_video_unregister();
> }
>
> static struct pci_driver poulsbo_driver = {
>
>
I am sorry I miss understand your last mail for poulsbo stub driver
cann't dependency on input, because your patch is old.
The following is the newest patch that was send out by me:
>>From 340b1068b20cfa152ff9992a7d69d19501b57163 Mon Sep 17 00:00:00 2001
From: Lee, Chun-Yi <jlee@...ell.com>
Date: Wed, 15 Sep 2010 22:19:25 +0800
Subject: [PATCH] Add Intel GMA500(Poulsbo) Stub Driver
Currently, there have no GMA500(Poulsbo) native video driver to support
intel opregion. So, use this stub driver to enable the acpi backlight
control sysfs entry files by requrest acpi_video_register.
Signed-off-by: Lee, Chun-Yi <jlee@...ell.com>
---
drivers/gpu/Makefile | 2 +-
drivers/gpu/stub/Kconfig | 13 +++++++++
drivers/gpu/stub/Makefile | 1 +
drivers/gpu/stub/poulsbo.c | 63 ++++++++++++++++++++++++++++++++++++++++++++
drivers/video/Kconfig | 2 +
5 files changed, 80 insertions(+), 1 deletions(-)
create mode 100644 drivers/gpu/stub/Kconfig
create mode 100644 drivers/gpu/stub/Makefile
create mode 100644 drivers/gpu/stub/poulsbo.c
diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index 30879df..cc92778 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -1 +1 @@
-obj-y += drm/ vga/
+obj-y += drm/ vga/ stub/
diff --git a/drivers/gpu/stub/Kconfig b/drivers/gpu/stub/Kconfig
new file mode 100644
index 0000000..8f5a540
--- /dev/null
+++ b/drivers/gpu/stub/Kconfig
@@ -0,0 +1,13 @@
+config STUB_POULSBO
+ tristate "Intel GMA500 Stub Driver"
+ depends on PCI
+ # Poulsbo stub depends on ACPI_VIDEO when ACPI is enabled
+ # but for select to work, need to select ACPI_VIDEO's dependencies, ick
+ select ACPI_VIDEO if ACPI
+ help
+ Choose this option if you have a system that has Intel GMA500
+ (Poulsbo) integrated graphics. If M is selected, the module will
+ be called Poulsbo. This driver is a stub driver for Poulsbo that
+ will call poulsbo.ko to enable the acpi backlight control sysfs
+ entry file because there have no poulsbo native driver can support
+ intel opregion.
diff --git a/drivers/gpu/stub/Makefile b/drivers/gpu/stub/Makefile
new file mode 100644
index 0000000..cd940cc
--- /dev/null
+++ b/drivers/gpu/stub/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_STUB_POULSBO) += poulsbo.o
diff --git a/drivers/gpu/stub/poulsbo.c b/drivers/gpu/stub/poulsbo.c
new file mode 100644
index 0000000..d8aa636
--- /dev/null
+++ b/drivers/gpu/stub/poulsbo.c
@@ -0,0 +1,63 @@
+/*
+ * Intel Poulsbo Stub driver
+ *
+ * Copyright (C) 2010 Novell <jlee@...ell.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <acpi/video.h>
+
+#define DRIVER_NAME "poulsbo"
+
+enum {
+ CHIP_PSB_8108 = 0,
+ CHIP_PSB_8109 = 1,
+};
+
+static struct pci_device_id pciidlist[] = {
+ {0x8086, 0x8108, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PSB_8108}, \
+ {0x8086, 0x8109, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PSB_8109}, \
+ {0, 0, 0}
+};
+
+static int poulsbo_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ return acpi_video_register();
+}
+
+static void poulsbo_remove(struct pci_dev *pdev)
+{
+ acpi_video_unregister();
+}
+
+static struct pci_driver poulsbo_driver = {
+ .name = DRIVER_NAME,
+ .id_table = pciidlist,
+ .probe = poulsbo_probe,
+ .remove = poulsbo_remove,
+};
+
+static int __init poulsbo_init(void)
+{
+ return pci_register_driver(&poulsbo_driver);
+}
+
+static void __exit poulsbo_exit(void)
+{
+ pci_unregister_driver(&poulsbo_driver);
+}
+
+module_init(poulsbo_init);
+module_exit(poulsbo_exit);
+
+MODULE_AUTHOR("Lee, Chun-Yi <jlee@...ell.com>");
+MODULE_DESCRIPTION("Poulsbo Stub Driver");
+MODULE_LICENSE("GPL");
+
+MODULE_DEVICE_TABLE(pci, pciidlist);
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 8b31fdf..8807ae5 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -17,6 +17,8 @@ source "drivers/gpu/vga/Kconfig"
source "drivers/gpu/drm/Kconfig"
+source "drivers/gpu/stub/Kconfig"
+
config VGASTATE
tristate
default n
--
1.6.0.2
--
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