On Wed, 13 Oct 2010 15:45:22 +1100 Stephen Rothwell wrote:

> Hi all,
> 
> Changes since 20101012:
> 
> The drm tree gained a conflict against the kgdb tree.


ERROR: "hwmon_device_unregister" [drivers/gpu/drm/nouveau/nouveau.ko] undefined!
ERROR: "hwmon_device_register" [drivers/gpu/drm/nouveau/nouveau.ko] undefined!
ERROR: "video_output_unregister" [drivers/acpi/video.ko] undefined!
ERROR: "video_output_register" [drivers/acpi/video.ko] undefined!

The latter 2 are simple to fix:
in drivers/gpu/drm/nouveau/Kconfig, for config DRM_NOUVEAU:

@@ -11,6 +11,7 @@ config DRM_NOUVEAU
        select FRAMEBUFFER_CONSOLE if !EMBEDDED
        select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
        select ACPI_VIDEO if ACPI
+       select VIDEO_OUTPUT_CONTROL if ACPI
        help
          Choose this option for open-source nVidia support.


The first 2 are a problem.  I'd like to add "depends on HWMON" to DRM_NOUVEAU,
but doing so gives:

drivers/video/Kconfig:30:error: recursive dependency detected!
drivers/video/Kconfig:30:       symbol FB is selected by DRM_KMS_HELPER
drivers/gpu/drm/Kconfig:22:     symbol DRM_KMS_HELPER is selected by DRM_NOUVEAU
drivers/gpu/drm/nouveau/Kconfig:1:      symbol DRM_NOUVEAU depends on HWMON
drivers/hwmon/Kconfig:5:        symbol HWMON is selected by THINKPAD_ACPI
drivers/platform/x86/Kconfig:232:       symbol THINKPAD_ACPI depends on INPUT
drivers/input/Kconfig:8:        symbol INPUT is selected by VT
drivers/char/Kconfig:7: symbol VT is selected by FB_STI
drivers/video/Kconfig:636:      symbol FB_STI depends on FB

so that must not be the right thing to do.  Aha, that change along with
changing all "select FB" (in drivers/gpu/drm/*) to "depends on FB"
fixes the kconfig warnings.  But feel free to fix it some other way.

My working patch is below.

---
From: Randy Dunlap <randy.dun...@oracle.com>

Fix drm and drm/nouveau kconfigs so that build succeeds and
kconfig warnings are eliminated.

Fixes these build errors:
ERROR: "hwmon_device_unregister" [drivers/gpu/drm/nouveau/nouveau.ko] undefined!
ERROR: "hwmon_device_register" [drivers/gpu/drm/nouveau/nouveau.ko] undefined!
ERROR: "video_output_unregister" [drivers/acpi/video.ko] undefined!
ERROR: "video_output_register" [drivers/acpi/video.ko] undefined!

Signed-off-by: Randy Dunlap <randy.dun...@oracle.com>
---
 drivers/gpu/drm/Kconfig         |    2 +-
 drivers/gpu/drm/nouveau/Kconfig |    5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

--- linux-next-20101013.orig/drivers/gpu/drm/nouveau/Kconfig
+++ linux-next-20101013/drivers/gpu/drm/nouveau/Kconfig
@@ -1,16 +1,17 @@
 config DRM_NOUVEAU
        tristate "Nouveau (nVidia) cards"
-       depends on DRM && PCI
+       depends on DRM && PCI && HWMON
+       depends on FB
         select FW_LOADER
        select DRM_KMS_HELPER
        select DRM_TTM
        select FB_CFB_FILLRECT
        select FB_CFB_COPYAREA
        select FB_CFB_IMAGEBLIT
-       select FB
        select FRAMEBUFFER_CONSOLE if !EMBEDDED
        select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
        select ACPI_VIDEO if ACPI
+       select VIDEO_OUTPUT_CONTROL if ACPI
        help
          Choose this option for open-source nVidia support.
 
--- linux-next-20101013.orig/drivers/gpu/drm/Kconfig
+++ linux-next-20101013/drivers/gpu/drm/Kconfig
@@ -22,7 +22,7 @@ menuconfig DRM
 config DRM_KMS_HELPER
        tristate
        depends on DRM
-       select FB
+       depends on FB
        select FRAMEBUFFER_CONSOLE if !EMBEDDED
        help
          FB and CRTC helpers for KMS drivers.
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