From 543a1817e58005b5db834a5aa60a78d9095cad81 Mon Sep 17 00:00:00 2001 From: Jeffy Chen Date: Thu, 6 Apr 2017 20:31:20 +0800 Subject: [PATCH] drm/rockchip: vop: Enable pm domain before vop_initial [ Upstream commit 5e570373c015b60a68828b1cd9d475cb33d3be4b ] We're trying to access vop registers here, so need to make sure the pm domain is on. Normally it should be enabled by the bootloader, but there's no guarantee of it. And if we wanna do unbind/bind, it would also cause the device to hang. And this patch also does these: 1/ move vop_initial to the end of vop_bind for eaiser error handling. 2/ correct the err_put_pm_runtime of vop_enable. Signed-off-by: Jeffy Chen Signed-off-by: Sean Paul Link: http://patchwork.freedesktop.org/patch/msgid/1491481885-13775-8-git-send-email-jeffy.chen@rock-chips.com Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index c7eba30..6e3c4ac 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -503,7 +503,7 @@ static int vop_enable(struct drm_crtc *crtc) ret = pm_runtime_get_sync(vop->dev); if (ret < 0) { dev_err(vop->dev, "failed to get pm runtime: %d\n", ret); - goto err_put_pm_runtime; + return ret; } ret = clk_enable(vop->hclk); @@ -1348,10 +1348,16 @@ static int vop_initial(struct vop *vop) return PTR_ERR(vop->dclk); } + ret = pm_runtime_get_sync(vop->dev); + if (ret < 0) { + dev_err(vop->dev, "failed to get pm runtime: %d\n", ret); + return ret; + } + ret = clk_prepare(vop->dclk); if (ret < 0) { dev_err(vop->dev, "failed to prepare dclk\n"); - return ret; + goto err_put_pm_runtime; } /* Enable both the hclk and aclk to setup the vop */ @@ -1411,6 +1417,8 @@ static int vop_initial(struct vop *vop) vop->is_enabled = false; + pm_runtime_put_sync(vop->dev); + return 0; err_disable_aclk: @@ -1419,6 +1427,8 @@ err_disable_hclk: clk_disable_unprepare(vop->hclk); err_unprepare_dclk: clk_unprepare(vop->dclk); +err_put_pm_runtime: + pm_runtime_put_sync(vop->dev); return ret; } @@ -1519,12 +1529,6 @@ static int vop_bind(struct device *dev, struct device *master, void *data) if (!vop->regsbak) return -ENOMEM; - ret = vop_initial(vop); - if (ret < 0) { - dev_err(&pdev->dev, "cannot initial vop dev - err %d\n", ret); - return ret; - } - irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(dev, "cannot find irq for vop\n"); @@ -1551,8 +1555,17 @@ static int vop_bind(struct device *dev, struct device *master, void *data) pm_runtime_enable(&pdev->dev); + ret = vop_initial(vop); + if (ret < 0) { + dev_err(&pdev->dev, "cannot initial vop dev - err %d\n", ret); + goto err_disable_pm_runtime; + } + return 0; +err_disable_pm_runtime: + pm_runtime_disable(&pdev->dev); + vop_destroy_crtc(vop); err_enable_irq: enable_irq(vop->irq); /* To balance out the disable_irq above */ return ret; -- 2.7.4