Commit 59fc7f52 authored by Ian Armstrong's avatar Ian Armstrong Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (5437): Update cx23415 documentation 



Adds more osd mode switching information.
Corrects some information regarding mode selection & local alpha operation for
16 bit modes.

Signed-off-by: default avatarIan Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 31a7c549

Documentation/video4linux/cx2341x/fw-decoder-regs.txt

+7 −5
Original line number Diff line number Diff line
@@ -624,11 +624,11 @@ out what values are bad when it hangs. 
2A00

      bits 0:2

	osd colour mode

	  000 = 8 bit indexed

	  001 = 16 bit (565)

	  010 = 15 bit (555)

	  011 = 12 bit (444)

	  100 = 32 bit (8888)

	  101 = 8 bit indexed



      bits 4:5

	osd display bpp
@@ -676,9 +676,11 @@ out what values are bad when it hangs. 
     completely transparent. When using 565, 555 or 444 colour modes, the

     colour key is always 16 bits wide. The colour to key on is set in Reg 2A18.



     Local alpha is a per-pixel 256 step transparency, with 0 being transparent

     and 255 being solid. This is only available in 32 bit & 8 bit indexed

     colour modes.

     Local alpha works differently depending on the colour mode. For 32bpp & 8

     bit indexed, local alpha is a per-pixel 256 step transparency, with 0 being

     transparent and 255 being solid. For the 16bpp modes 555 & 444, the unused

     bit(s) act as a simple transparency switch, with 0 being solid & 1 being

     fully transparent. There is no local alpha support for 16bit 565.



     Global alpha is a 256 step transparency that applies to the entire osd,

     with 0 being transparent & 255 being solid.
@@ -811,5 +813,5 @@ out what values are bad when it hangs. 


--------------------------------------------------------------------------------



v0.3 - 2 February 2007 - Ian Armstrong (ian@iarmst.demon.co.uk)

v0.4 - 12 March 2007 - Ian Armstrong (ian@iarmst.demon.co.uk)

Documentation/video4linux/cx2341x/fw-osd-api.txt

+10 −2
Original line number Diff line number Diff line
@@ -21,7 +21,11 @@ Enum 66/0x42 
Description

	Query OSD format

Result[0]

	0=8bit index, 4=AlphaRGB 8:8:8:8

	0=8bit index

	1=16bit RGB 5:6:5

	2=16bit ARGB 1:5:5:5

	3=16bit ARGB 1:4:4:4

	4=32bit ARGB 8:8:8:8



-------------------------------------------------------------------------------
@@ -30,7 +34,11 @@ Enum 67/0x43 
Description

	Assign pixel format

Param[0]

	0=8bit index, 4=AlphaRGB 8:8:8:8

	0=8bit index

	1=16bit RGB 5:6:5

	2=16bit ARGB 1:5:5:5

	3=16bit ARGB 1:4:4:4

	4=32bit ARGB 8:8:8:8



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