Messages in this thread | | | Date | Sun, 19 Sep 2004 21:06:05 -0400 | From | Jon Smirl <> | Subject | Re: Design for setting video modes, ownership of sysfs attributes |
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I've been talking to the I2C people about the right way to solve this for the code in radeon_probe_i2c_connector(). This should be solvable in the I2C framework by writing an EDID driver that implements the code in it's attach_adapter/detach_adapter functions. What I2C is missing is a way to tell it to not run the DDC module on non video buses. Buses need to be marked with a class like video or ram.
I agree that what you have in the radeon driver works. But this is a generic problem with DDC monitors, not something that is radeon specific. If possible I'd like to figure out a solution to this that will work generically so we don't have to add this same code to all of the video drivers. I currently don't have a working solution for the problem using the I2C framework.
I kept the code for the non-DDC monitor detection as is and just made an IOCTL around it so that I can trigger it from the user space app.
On Mon, 20 Sep 2004 10:07:40 +1000, Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote: > On Mon, 2004-09-20 at 02:12, Jon Smirl wrote: > > > The radeon driver has that extra code for intializing older DDC. That > > can be handled generically in the I2C layer by writing a ddc driver > > that is a superset of the eeprom driver. I'd rather get that code > > into a generic driver than repeat it in every video card driver. > > I'm not a fan of this solution as you know... oh well... and there's > all that code to detect non-DDC capable monitors as well, which won't > go through /sys/*/i2c... > > But do as you like, I don't have time to work on it so I'll shut up. > > Ben. > >
-- Jon Smirl jonsmirl@gmail.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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