Thanks for patch. 2014-07-04 19:33 GMT+09:00 Tushar Behera <tushar.b@xxxxxxxxxxx>: > Under some conditions (when IOMMU is enabled), fimd_bind() accesses > hardware registers and power-domain should be enabled during that time. > > fimd_bind --> fimd_mgr_initialize --> fimd_clear_channel > > If the power-domain is disabled by that time, we get a boot-time crash. > It would be better to keep power-domain enabled explicitly. > > Unhandled fault: external abort on non-linefetch (0x1008) at 0xf0180034 > Internal error: : 1008 [#1] PREEMPT SMP ARM > ... > PC is at fimd_bind+0x84/0x134 > LR is at component_bind_all+0xb4/0x1d8 > > Signed-off-by: Tushar Behera <tushar.b@xxxxxxxxxxx> > --- > drivers/gpu/drm/exynos/exynos_drm_fimd.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > index 33161ad..34275fb 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > @@ -888,11 +888,15 @@ static int fimd_bind(struct device *dev, struct device *master, void *data) > struct fimd_context *ctx = fimd_manager.ctx; > struct drm_device *drm_dev = data; > > + pm_runtime_get_sync(dev); > + fimd driver has no runtime pm interfaces so pm_runtime_get_sync call will enable lcd0 power domain. So shouldn't fimd clock also be enabled? > fimd_mgr_initialize(&fimd_manager, drm_dev); And here would be good to call clk_disable_unprepare() and pm_runtime_put_sync(). Below codes don't access any fimd register. Or move these function calls into fimd_mgr_initialize(). Thanks, Inki Dae > exynos_drm_crtc_create(&fimd_manager); > if (ctx->display) > exynos_drm_create_enc_conn(drm_dev, ctx->display); > > + pm_runtime_put_sync(dev); > + > return 0; > > } > -- > 1.7.9.5 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
