On Tue, Feb 17, 2004 at 04:38:12PM +0100, Takashi Iwai wrote: > At Tue, 17 Feb 2004 08:20:41 +0200, > Ville Syrjälä wrote: > > > > [1 <text/plain; iso-8859-1 (quoted-printable)>] > > The attached patch fixes hardware volume buttons on my Dell Inspiron 7000 > > laptop. The chip is ESS Maestro2 (0x125d:0x1968). > > > > I have no idea if this will break things for someone else. Since the > > datasheet didn't help me understand the registers involved I just printed > > their contents and came up with the used bits. > > > > All registers had the following values in my tests: > > mute: 0x99 > > vol down: 0x77 > > vol up: 0xBB > > these values (9, 7, b) are consistent always?
So it would appear. I've tried hitting the buttons in various combinations and the values have been consistent. The only thing that is a bit odd is that after hitting the mute button the next vol up/down doesn't generate an interrupt at all. Only the next press after that actually works. But that is a hardware issue. > i'm also not sure whether it's hardware specific... The device has a subsystem id 0x1028:0x0085 should there be a need to add hw specific stuff. The code in maestro.tar.gz uses GPIO data register 0x60 to check for mute button press. That would actually work on my system but I don't see much point in checking another register when 0x1C is enough. The vol up/down test in that code checks for difference between 0x1E and 0x1F. That would not work on my system because all registers 0x1C-0x1F have identical values. -- Ville Syrjälä [EMAIL PROTECTED] http://www.sci.fi/~syrjala/ ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id56&alloc_id438&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
