Hi, Lee,

there are several regressions caused by this patch, http://marc.info/?l=linux-acpi&m=128872402020412&w=2 http://marc.info/?l=linux-acpi&m=128858111022621&w=2

Yes, We can fix it by "select INPUT if ACPI"/"select VIDEO_OUTPUT_CONTROL if ACPI". But IMO, STUB_POULSBO should not select ACPI_VIDEO at all, what do you think?

thanks, rui

On Wed, 2010-11-03 at 09:19 +0800, Zhang Rui wrote:

Hi, Lee,

Sorry I missed this thread.

On Wed, 2010-10-20 at 13:51 +0800, Lee, Chun-Yi wrote:

...

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.

If you want the acpi backlight control, why not set CONFIG_ACPI_VIDEO driver directly? The reason why i915 driver selects ACPI_VIDEO is that it needs some cooperation between these two drivers during initialization, or else the system may hang.

thanks, rui

...

Signed-off-by: Lee, Chun-Yi jlee@novell.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@novell.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@novell.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