[PATCH v1 1/2] drivers/video/fbdev: don't select DMA_CMA
rppt at kernel.org
Thu Apr 8 19:56:02 AEST 2021
On Thu, Apr 08, 2021 at 11:20:10AM +0200, David Hildenbrand wrote:
> Random drivers should not override a user configuration of core knobs
> (e.g., CONFIG_DMA_CMA=n). Use "imply" instead, to still respect
> dependencies and manual overrides.
> "This is similar to "select" as it enforces a lower limit on another
> symbol except that the "implied" symbol's value may still be set to n
> from a direct dependency or with a visible prompt."
> Implying DRM_CMA should be sufficient, as that depends on CMA.
^ DMA_CMA ?
> Note: If this is a real dependency, we should use "depends on DMA_CMA"
> instead - but I assume the driver can work without CMA just fine --
> esp. when we wouldn't have HAVE_DMA_CONTIGUOUS or CMA right now.
> Signed-off-by: David Hildenbrand <david at redhat.com>
> drivers/video/fbdev/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> index 4f02db65dede..d37cd5341e1b 100644
> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -2186,7 +2186,7 @@ config FB_HYPERV
> select FB_CFB_COPYAREA
> select FB_CFB_IMAGEBLIT
> select FB_DEFERRED_IO
> - select DMA_CMA if HAVE_DMA_CONTIGUOUS && CMA
> + imply DMA_CMA
> This framebuffer driver supports Microsoft Hyper-V Synthetic Video.
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