| Message ID | 20210408092011.52763-2-david@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drivers: don't select DMA_CMA or CMA | expand |
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@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 > help > This framebuffer driver supports Microsoft Hyper-V Synthetic Video. > > -- > 2.30.2 >
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 help This framebuffer driver supports Microsoft Hyper-V Synthetic Video.
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. 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@redhat.com> --- drivers/video/fbdev/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)