msm: kgsl: Cleanup function returns

Change-Id: Ic683e34cbde40b77475bc5fe98d958f364f9ae7b
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>
Signed-off-by: Ronny Schmatzler <schmatzler@googlemail.com>
msm: kgsl: power state cleanup

Clean up kgsl_pwrctrl_sleep() and kgsl_pwrctrl_wake() to make
state transistions clearer.  Add kgsl_pwrctrl_request_state()
and kgsl_pwrctrl_set_state() to make it easier to debug the
state machine.

CRs-Fixed: 315833
Change-Id: I656ce8bd19feabd4186ef91dc031f8a6c6a7d09a
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
Signed-off-by: Ronny Schmatzler <schmatzler@googlemail.com>
msm: kgsl: Avoid a deadlock in the IRQ handler

If a major GPU fault occurs, interrupts should be turned off to
avoid a storm.  Calling disable_irq from within the IRQ handler,
however has deadlock problems.  Call disable_irq_nosync in an
interrupt context instead.

CRs-fixed: 299686
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Ronny Schmatzler <schmatzler@googlemail.com>
msm: kgsl: add power tracepoints

Add kgsl_clk, kgsl_bus, kgsl_irq, kgsl_rail, kgsl_pwrlevel,
kgsl_pwr_set_state and kgsl_pwr_request_state trace
events.

Change-Id: I3bf246f350b1208123ab9a33c08495cea9c533eb
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
Signed-off-by: Ronny Schmatzler <schmatzler@googlemail.com>