Revision 197234520bd83aba2199add57a9d2678ee7f9781 authored by Paul Walmsley on 26 January 2012, 02:50:56 UTC, committed by Greg Kroah-Hartman on 09 February 2012, 18:48:36 UTC
The receive FIFO wakeup latency estimate in the omap-serial driver is three orders of magnitude too small. This effectively prevents the MPU from going to a low-power state when CONFIG_CPU_IDLE=y. This is a major power management regression and masks some other FIFO-related bugs in the driver. Fix by correcting the most egregious problem in the RX wakeup latency estimate. There are several other flaws in the estimator; these will be fixed by a separate patch series intended for 3.4. The difference in low-power states with this patch can be observed via debugfs in pm_debug/count. This estimate does not have any effect when CONFIG_CPU_IDLE=n. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Alan Cox <alan@linux.intel.com> Acked-by: Govindraj.R <govindraj.raja@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Tested-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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| File | Mode | Size |
|---|---|---|
| i2c | ||
| ttm | ||
| Kbuild | -rw-r--r-- | 326 bytes |
| drm.h | -rw-r--r-- | 24.5 KB |
| drmP.h | -rw-r--r-- | 55.3 KB |
| drm_buffer.h | -rw-r--r-- | 4.5 KB |
| drm_cache.h | -rw-r--r-- | 1.5 KB |
| drm_core.h | -rw-r--r-- | 1.4 KB |
| drm_crtc.h | -rw-r--r-- | 35.8 KB |
| drm_crtc_helper.h | -rw-r--r-- | 5.6 KB |
| drm_dp_helper.h | -rw-r--r-- | 8.6 KB |
| drm_edid.h | -rw-r--r-- | 7.2 KB |
| drm_encoder_slave.h | -rw-r--r-- | 5.7 KB |
| drm_fb_helper.h | -rw-r--r-- | 4.1 KB |
| drm_fixed.h | -rw-r--r-- | 2.1 KB |
| drm_fourcc.h | -rw-r--r-- | 8.0 KB |
| drm_global.h | -rw-r--r-- | 2.0 KB |
| drm_hashtab.h | -rw-r--r-- | 2.5 KB |
| drm_mem_util.h | -rw-r--r-- | 2.0 KB |
| drm_memory.h | -rw-r--r-- | 1.9 KB |
| drm_mm.h | -rw-r--r-- | 6.2 KB |
| drm_mode.h | -rw-r--r-- | 11.8 KB |
| drm_os_linux.h | -rw-r--r-- | 3.9 KB |
| drm_pciids.h | -rw-r--r-- | 52.5 KB |
| drm_sarea.h | -rw-r--r-- | 2.6 KB |
| drm_sysfs.h | -rw-r--r-- | 300 bytes |
| drm_usb.h | -rw-r--r-- | 375 bytes |
| exynos_drm.h | -rw-r--r-- | 4.3 KB |
| gma_drm.h | -rw-r--r-- | 2.4 KB |
| i810_drm.h | -rw-r--r-- | 9.7 KB |
| i915_drm.h | -rw-r--r-- | 26.4 KB |
| intel-gtt.h | -rw-r--r-- | 1.5 KB |
| mga_drm.h | -rw-r--r-- | 12.6 KB |
| nouveau_drm.h | -rw-r--r-- | 6.8 KB |
| r128_drm.h | -rw-r--r-- | 9.7 KB |
| radeon_drm.h | -rw-r--r-- | 33.4 KB |
| savage_drm.h | -rw-r--r-- | 6.9 KB |
| sis_drm.h | -rw-r--r-- | 2.5 KB |
| via_drm.h | -rw-r--r-- | 8.2 KB |
| vmwgfx_drm.h | -rw-r--r-- | 21.9 KB |
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