Subject: Re: [PATCH 1/3] omap-dma: Allow compile-testing omap1_camera driver

From: Russell King - ARM Linux <[email-masked]>
Date: Tue, 9 Sep 2014 15:41:58 +0100

On Tue, Sep 09, 2014 at 11:38:17AM -0300, Mauro Carvalho Chehab wrote:
> We want to be able to COMPILE_TEST the omap1_camera driver.
> It compiles fine, but it fails linkediting:
> 
> ERROR: "omap_stop_dma" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_start_dma" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_dma_link_lch" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_set_dma_dest_burst_mode" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_set_dma_src_params" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_request_dma" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_set_dma_transfer_params" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_set_dma_dest_params" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> ERROR: "omap_free_dma" [drivers/media/platform/soc_camera/omap1_camera.ko] undefined!
> 
> So, add some stub functions to avoid it.

The real answer to this is to find someone who still uses it, and convert
it to the DMA engine API.  If there's no users, the driver might as well
be killed off.

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