On Wed, May 11, 2016 at 10:15:20PM +0200, Arnd Bergmann wrote:
On Wednesday 11 May 2016 22:11:07 Arnd Bergmann wrote:
We get a harmless build warning when trying to use the mediatek DRM driver with IOMMU support disabled:
warning: (DRM_MEDIATEK) selects IOMMU_DMA which has unmet direct dependencies (IOMMU_SUPPORT)
However, the IOMMU_DMA symbol is not meant to be used by drivers at all, and this driver doesn't seem to have a strict dependency on it other than using the mediatek IOMMU driver that does.
Since we also want to be able to do compile tests with the driver on other platforms, the IOMMU_DMA symbol should not be selected here.
Signed-off-by: Arnd Bergmann arnd@arndb.de
If someone has a better explanation about why the 'select' is here, let me know, it certainly seems out of place.
Sorry, I didn't mean to send this as a reply to "More build fixes for omapdrm in current -next", I copied the wrong command line.
I'll resend it if necessary.
That's probably the reason why patchwork didn't include the commit message in the downloaded mbox. I've pieced it together manually and applied this to topic/drm-misc.
Thanks, Thierry