Hi, On Mon, Feb 14, 2011 at 04:21:47PM +0200, Tomi Valkeinen wrote: > On Wed, 2011-02-02 at 08:56 +0000, archit taneja wrote: > > OMAP2 has an irq line dedicated for DISPC interrupts, there is no DSI > > on omap2. > > OMAP3 has a common irq line for DISPC and DSI interrupts. > > OMAP4 has seperate irq lines for DISPC and DSI Interrupts. > > > > Use dss_features to have a common DSS irq handler for all OMAP revisions. > > > > Also, use a member of the global dss structure to store the irq number > > as it is used in 2 functions. > > It's good to remove the cpu_is_xxxx() calls, but I'm not quite sure > about this patch... > > Could we use shared interrupt handlers here, so that dss.c would handle > only DISPC interrupts (or should it be even in dispc.c?) and dsi.c would > handle DSI interrupts? > > On OMAP3 both dss.c and dsi.c would register to the same interrupt, and > they would need to check if the interrupt was really for them. On OMAP4 > the code could be the same, even though the check is unnecessary. > > Also, as I mentioned in the email I sent some minutes ago, this patch > fixes the free_irq call in dss_exit. Things like that should never be > fixed silently, even if it's trivial like in this case.
does it make sense to install an irq_chip for that ? I mean, can you mask/unmask dss and or dsi IRQs ? If you can, then it might make sense to take a look into GENIRQ and install an irq_chip for that. Then both dsi and dss would be able to use standard request_irq() API. Take a look at drivers/mfd/twl*irq.c and drivers/cbus/retu.c (the last one on linux-omap only) there are examples of how that should be implemented. Actually twl*irq.c is wrong, as it bypasses the threaded IRQ stuff. I have some patches for those, but I'm not sure they are working correctly yet, needs more testing. My twl4030-irq patches are available at [1] for reference. [1] http://gitorious.org/usb/usb/commits/twlirq -- balbi -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
