* A question about touchscreen absmax value @ 2009-11-16 1:53 Joonyoung Shim 2009-11-16 17:12 ` Dmitry Torokhov 0 siblings, 1 reply; 5+ messages in thread From: Joonyoung Shim @ 2009-11-16 1:53 UTC (permalink / raw) To: linux-input Hi, all. I have a question about touchscreen resolution. My touchscreen device can report the position from 0 to 1023 of x and y coordinates, so i setted the absmax of input device to 1023. BTW, i only can get from 0 to 479 x position and to 799 y position because the LCD resolution of the target is 480 x 800. I wonder which value is setted to the absmax - 479 and 799 or 1023. ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: A question about touchscreen absmax value 2009-11-16 1:53 A question about touchscreen absmax value Joonyoung Shim @ 2009-11-16 17:12 ` Dmitry Torokhov 2009-11-17 3:00 ` Joonyoung Shim 0 siblings, 1 reply; 5+ messages in thread From: Dmitry Torokhov @ 2009-11-16 17:12 UTC (permalink / raw) To: Joonyoung Shim; +Cc: linux-input Hi Joonyoung, On Mon, Nov 16, 2009 at 10:53:18AM +0900, Joonyoung Shim wrote: > Hi, all. > > I have a question about touchscreen resolution. My touchscreen device > can report the position from 0 to 1023 of x and y coordinates, so i > setted the absmax of input device to 1023. BTW, i only can get from 0 to > 479 x position and to 799 y position because the LCD resolution of the > target is 480 x 800. I wonder which value is setted to the absmax - 479 > and 799 or 1023. I believe driver should, by default, set absmin and absmax to match the limits of the hardware/protocol. In your case it would be 1023. The driver may choose to accept additional infromation from platform data, if present, you can also adjust absmin/absmax etc via ioctl durng the bootup sequence. Hope this helps. -- Dmitry ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: A question about touchscreen absmax value 2009-11-16 17:12 ` Dmitry Torokhov @ 2009-11-17 3:00 ` Joonyoung Shim 2009-11-17 5:48 ` Dmitry Torokhov 0 siblings, 1 reply; 5+ messages in thread From: Joonyoung Shim @ 2009-11-17 3:00 UTC (permalink / raw) To: Dmitry Torokhov; +Cc: linux-input On 11/17/2009 2:12 AM, Dmitry Torokhov wrote: > Hi Joonyoung, > > On Mon, Nov 16, 2009 at 10:53:18AM +0900, Joonyoung Shim wrote: >> Hi, all. >> >> I have a question about touchscreen resolution. My touchscreen device >> can report the position from 0 to 1023 of x and y coordinates, so i >> setted the absmax of input device to 1023. BTW, i only can get from 0 to >> 479 x position and to 799 y position because the LCD resolution of the >> target is 480 x 800. I wonder which value is setted to the absmax - 479 >> and 799 or 1023. > > I believe driver should, by default, set absmin and absmax to match the > limits of the hardware/protocol. In your case it would be 1023. The > driver may choose to accept additional infromation from platform data, if > present, you can also adjust absmin/absmax etc via ioctl durng the > bootup sequence. Hmm, i get the resolution information from platform data, so i can set absmax values from platform data. Is it ok? Thanks for reply. ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: A question about touchscreen absmax value 2009-11-17 3:00 ` Joonyoung Shim @ 2009-11-17 5:48 ` Dmitry Torokhov 2009-11-17 6:18 ` Joonyoung Shim 0 siblings, 1 reply; 5+ messages in thread From: Dmitry Torokhov @ 2009-11-17 5:48 UTC (permalink / raw) To: Joonyoung Shim; +Cc: linux-input On Tue, Nov 17, 2009 at 12:00:08PM +0900, Joonyoung Shim wrote: > On 11/17/2009 2:12 AM, Dmitry Torokhov wrote: > > Hi Joonyoung, > > > > On Mon, Nov 16, 2009 at 10:53:18AM +0900, Joonyoung Shim wrote: > >> Hi, all. > >> > >> I have a question about touchscreen resolution. My touchscreen device > >> can report the position from 0 to 1023 of x and y coordinates, so i > >> setted the absmax of input device to 1023. BTW, i only can get from 0 to > >> 479 x position and to 799 y position because the LCD resolution of the > >> target is 480 x 800. I wonder which value is setted to the absmax - 479 > >> and 799 or 1023. > > > > I believe driver should, by default, set absmin and absmax to match the > > limits of the hardware/protocol. In your case it would be 1023. The > > driver may choose to accept additional infromation from platform data, if > > present, you can also adjust absmin/absmax etc via ioctl durng the > > bootup sequence. > > Hmm, i get the resolution information from platform data, so i can > set absmax values from platform data. Is it ok? > Sure, if there is only one possible configuration for the device on a given platform - yes. -- Dmitry ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: A question about touchscreen absmax value 2009-11-17 5:48 ` Dmitry Torokhov @ 2009-11-17 6:18 ` Joonyoung Shim 0 siblings, 0 replies; 5+ messages in thread From: Joonyoung Shim @ 2009-11-17 6:18 UTC (permalink / raw) To: Dmitry Torokhov; +Cc: linux-input On 11/17/2009 2:48 PM, Dmitry Torokhov wrote: > On Tue, Nov 17, 2009 at 12:00:08PM +0900, Joonyoung Shim wrote: >> On 11/17/2009 2:12 AM, Dmitry Torokhov wrote: >>> Hi Joonyoung, >>> >>> On Mon, Nov 16, 2009 at 10:53:18AM +0900, Joonyoung Shim wrote: >>>> Hi, all. >>>> >>>> I have a question about touchscreen resolution. My touchscreen device >>>> can report the position from 0 to 1023 of x and y coordinates, so i >>>> setted the absmax of input device to 1023. BTW, i only can get from 0 to >>>> 479 x position and to 799 y position because the LCD resolution of the >>>> target is 480 x 800. I wonder which value is setted to the absmax - 479 >>>> and 799 or 1023. >>> I believe driver should, by default, set absmin and absmax to match the >>> limits of the hardware/protocol. In your case it would be 1023. The >>> driver may choose to accept additional infromation from platform data, if >>> present, you can also adjust absmin/absmax etc via ioctl durng the >>> bootup sequence. >> Hmm, i get the resolution information from platform data, so i can >> set absmax values from platform data. Is it ok? >> > > Sure, if there is only one possible configuration for the device on a > given platform - yes. > OK, it is helpful me. Thanks. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2009-11-17 6:18 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2009-11-16 1:53 A question about touchscreen absmax value Joonyoung Shim 2009-11-16 17:12 ` Dmitry Torokhov 2009-11-17 3:00 ` Joonyoung Shim 2009-11-17 5:48 ` Dmitry Torokhov 2009-11-17 6:18 ` Joonyoung Shim
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).