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Date: Fri, 4 Jul 2014 16:03:19 +0530 From: Tushar Behera <tushar.b@...sung.com> To: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org, dri-devel@...ts.freedesktop.org Cc: kgene.kim@...sung.com, airlied@...ux.ie, kyungmin.park@...sung.com, sw0312.kim@...sung.com, jy0922.shim@...sung.com, inki.dae@...sung.com, trblinux@...il.com Subject: [PATCH] drm/exynos: fimd: Keep power enabled during fimd_bind 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@...sung.com> --- 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_mgr_initialize(&fimd_manager, drm_dev); 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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