French, Nicholas A 526daee730 media: ivtv: add parameter to enable ivtvfb on x86 PAT systems ... ivtvfb was previously disabled for x86 PAT-enabled systems by commit 1bf1735b47 ("x86/mm/pat, drivers/media/ivtv: Use arch_phys_wc_add() and require PAT disabled") as a workaround to abstract MTRR code away from device drivers. The driver is not easily upgradable to the PAT-aware ioremap_wc() API since the firmware hides the address ranges that should be marked write-combined from the driver. However, since a write-combined cache on the framebuffer is only a performance enhancement not a requirement for the framebuffer to function, completely disabling the driver in this configuration is not necessary. Add force_pat module parameter and a corresponding kernel configuration parameter to optionally force initialization on PAT-enabled x86 systems with a warning about the lack of write-combined caching, and document the reasons the driver cannot be easily updated to support wc caching on all systems. Signed-off-by: Nick French <naf@ou.edu> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> [hverkuil-cisco@xs4all.nl: fix typo, split long pr_ lines up] Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>		2019-01-21 15:33:26 -02:00
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b2c2	media: drivers: media: pci: b2c2: Fix errors due to unappropriate coding style.	2018-12-05 04:23:19 -05:00
bt8xx	media: vidioc_cropcap -> vidioc_g_pixelaspect	2018-11-20 13:57:21 -05:00
cobalt	media: vidioc_cropcap -> vidioc_g_pixelaspect	2018-11-20 13:57:21 -05:00
cx18	media: vidioc_cropcap -> vidioc_g_pixelaspect	2018-11-20 13:57:21 -05:00
cx88
cx23885	media: cx23885: only reset DMA on problematic CPUs	2018-12-20 06:52:01 -05:00
cx25821
ddbridge	media: ddbridge: Move asm includes after linux ones	2018-12-20 06:42:14 -05:00
dm1105
dt3155
intel	media: ipu3-cio2, dw9714: Remove Jian Xu's e-mail	2019-01-16 13:34:01 -05:00
ivtv	media: ivtv: add parameter to enable ivtvfb on x86 PAT systems	2019-01-21 15:33:26 -02:00
mantis	media: remove redundant include moduleparam.h	2018-12-05 04:33:45 -05:00
meye
netup_unidvb
ngene
pluto2
pt1
pt3
saa7134	media: saa7134: rc-core maintains users count, no need to duplicate	2018-12-03 13:22:46 -05:00
saa7146
saa7164
smipcie
solo6x10
sta2x11
ttpci
tw68
tw686x
tw5864
Kconfig
Makefile