[Intel-gfx] [PATCH 24/24] drm/i915: simplify rps interrupt enabling/disabling sequence

[Ben Widawsky]

On Wed, Jun 12, 2013 at 01:37:26PM +0200, Daniel Vetter wrote:
> At the moment we have the following interrupt enabling sequence:
> 1. irq preinstall hook
> 2. enabling the interrupt handler and calling irq postinstall hook
> 3. enable rps interrupts from the async work
> 
> And the folliwing disable sequence:
> 1. disabling the interrupt handler and calling the uninstall hook
> 2. disabling the rps interrupt
> 
> Since the postinstall hook now always sets up PMIIR, PMIER and PMIMR
> to known-good states there no way for an interrupt to sneak in in the
> enable sequence, so we can reinstate the WARN lost in
> 
> commit eda63ffb906c2fb3b609a0e87aeb63c0f25b9e6b
> Author: Ben Widawsky <ben at bwidawsk.net>
> Date:   Tue May 28 19:22:26 2013 -0700
> 
>     drm/i915: Add PM regs to pre/post install
> 
> Note that there's some room for future cleanups since most of the
> interrupt register clearing in the disable function is rather
> redundant. But that's better done in follow-up patches, if at all.
> 
> Cc: Ben Widawsky <ben at bwidawsk.net>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>

Reviewed-by: Ben Widawsky <ben at bwidawsk.net>

Assuming the first 23 patches fixed it all :-)

-- 
Ben Widawsky, Intel Open Source Technology Center