[PATCH] drm/msm: Initialize MDSS irq domain at probe time
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Wed Dec 1 20:20:23 UTC 2021
Since commit 8f59ee9a570c ("drm/msm/dsi: Adjust probe order"), the
DSI host gets initialized earlier, but this caused unability to probe
the entire stack of components because they all depend on interrupts
coming from the main `mdss` node (mdp5, or dpu1).
To fix this issue, move mdss device initialization (which include irq
domain setup) to msm_mdev_probe() time, as to make sure that the
interrupt controller is available before dsi and/or other components try
to initialize, finally satisfying the dependency.
Fixes: 8f59ee9a570c ("drm/msm/dsi: Adjust probe order")
Co-Developed-By: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
When checking your patch, I noticed that IRQ domain is created before
respective MDSS clocks are enabled. This does not look like causing any
issues at this time, but it did not look good. So I started moving
clocks parsing to early_init() callbacks. And at some point it looked
like we can drop the init()/destroy() callbacks in favour of
early_init() and remove(). Which promted me to move init()/destroy() in
place of early_init()/remove() with few minor fixes here and there.
---
drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 25 +++++-----
drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c | 32 ++++++-------
drivers/gpu/drm/msm/msm_drv.c | 56 ++++++++++++-----------
drivers/gpu/drm/msm/msm_kms.h | 8 ++--
4 files changed, 59 insertions(+), 62 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index b466784d9822..131c1f1a869c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -111,7 +111,7 @@ static int _dpu_mdss_irq_domain_add(struct dpu_mdss *dpu_mdss)
struct device *dev;
struct irq_domain *domain;
- dev = dpu_mdss->base.dev->dev;
+ dev = dpu_mdss->base.dev;
domain = irq_domain_add_linear(dev->of_node, 32,
&dpu_mdss_irqdomain_ops, dpu_mdss);
@@ -184,16 +184,15 @@ static int dpu_mdss_disable(struct msm_mdss *mdss)
return ret;
}
-static void dpu_mdss_destroy(struct drm_device *dev)
+static void dpu_mdss_destroy(struct msm_mdss *mdss)
{
- struct platform_device *pdev = to_platform_device(dev->dev);
- struct msm_drm_private *priv = dev->dev_private;
- struct dpu_mdss *dpu_mdss = to_dpu_mdss(priv->mdss);
+ struct platform_device *pdev = to_platform_device(mdss->dev);
+ struct dpu_mdss *dpu_mdss = to_dpu_mdss(mdss);
struct dss_module_power *mp = &dpu_mdss->mp;
int irq;
- pm_runtime_suspend(dev->dev);
- pm_runtime_disable(dev->dev);
+ pm_runtime_suspend(mdss->dev);
+ pm_runtime_disable(mdss->dev);
_dpu_mdss_irq_domain_fini(dpu_mdss);
irq = platform_get_irq(pdev, 0);
irq_set_chained_handler_and_data(irq, NULL, NULL);
@@ -203,7 +202,6 @@ static void dpu_mdss_destroy(struct drm_device *dev)
if (dpu_mdss->mmio)
devm_iounmap(&pdev->dev, dpu_mdss->mmio);
dpu_mdss->mmio = NULL;
- priv->mdss = NULL;
}
static const struct msm_mdss_funcs mdss_funcs = {
@@ -212,16 +210,15 @@ static const struct msm_mdss_funcs mdss_funcs = {
.destroy = dpu_mdss_destroy,
};
-int dpu_mdss_init(struct drm_device *dev)
+int dpu_mdss_init(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(dev->dev);
- struct msm_drm_private *priv = dev->dev_private;
+ struct msm_drm_private *priv = platform_get_drvdata(pdev);
struct dpu_mdss *dpu_mdss;
struct dss_module_power *mp;
int ret;
int irq;
- dpu_mdss = devm_kzalloc(dev->dev, sizeof(*dpu_mdss), GFP_KERNEL);
+ dpu_mdss = devm_kzalloc(&pdev->dev, sizeof(*dpu_mdss), GFP_KERNEL);
if (!dpu_mdss)
return -ENOMEM;
@@ -238,7 +235,7 @@ int dpu_mdss_init(struct drm_device *dev)
goto clk_parse_err;
}
- dpu_mdss->base.dev = dev;
+ dpu_mdss->base.dev = &pdev->dev;
dpu_mdss->base.funcs = &mdss_funcs;
ret = _dpu_mdss_irq_domain_add(dpu_mdss);
@@ -256,7 +253,7 @@ int dpu_mdss_init(struct drm_device *dev)
priv->mdss = &dpu_mdss->base;
- pm_runtime_enable(dev->dev);
+ pm_runtime_enable(&pdev->dev);
return 0;
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c
index c34760d981b8..b3f79c2277e9 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c
@@ -112,7 +112,7 @@ static const struct irq_domain_ops mdss_hw_irqdomain_ops = {
static int mdss_irq_domain_init(struct mdp5_mdss *mdp5_mdss)
{
- struct device *dev = mdp5_mdss->base.dev->dev;
+ struct device *dev = mdp5_mdss->base.dev;
struct irq_domain *d;
d = irq_domain_add_linear(dev->of_node, 32, &mdss_hw_irqdomain_ops,
@@ -155,7 +155,7 @@ static int mdp5_mdss_disable(struct msm_mdss *mdss)
static int msm_mdss_get_clocks(struct mdp5_mdss *mdp5_mdss)
{
struct platform_device *pdev =
- to_platform_device(mdp5_mdss->base.dev->dev);
+ to_platform_device(mdp5_mdss->base.dev);
mdp5_mdss->ahb_clk = msm_clk_get(pdev, "iface");
if (IS_ERR(mdp5_mdss->ahb_clk))
@@ -172,10 +172,9 @@ static int msm_mdss_get_clocks(struct mdp5_mdss *mdp5_mdss)
return 0;
}
-static void mdp5_mdss_destroy(struct drm_device *dev)
+static void mdp5_mdss_destroy(struct msm_mdss *mdss)
{
- struct msm_drm_private *priv = dev->dev_private;
- struct mdp5_mdss *mdp5_mdss = to_mdp5_mdss(priv->mdss);
+ struct mdp5_mdss *mdp5_mdss = to_mdp5_mdss(mdss);
if (!mdp5_mdss)
return;
@@ -183,7 +182,7 @@ static void mdp5_mdss_destroy(struct drm_device *dev)
irq_domain_remove(mdp5_mdss->irqcontroller.domain);
mdp5_mdss->irqcontroller.domain = NULL;
- pm_runtime_disable(dev->dev);
+ pm_runtime_disable(mdss->dev);
}
static const struct msm_mdss_funcs mdss_funcs = {
@@ -192,25 +191,24 @@ static const struct msm_mdss_funcs mdss_funcs = {
.destroy = mdp5_mdss_destroy,
};
-int mdp5_mdss_init(struct drm_device *dev)
+int mdp5_mdss_init(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(dev->dev);
- struct msm_drm_private *priv = dev->dev_private;
+ struct msm_drm_private *priv = platform_get_drvdata(pdev);
struct mdp5_mdss *mdp5_mdss;
int ret;
DBG("");
- if (!of_device_is_compatible(dev->dev->of_node, "qcom,mdss"))
+ if (!of_device_is_compatible(pdev->dev.of_node, "qcom,mdss"))
return 0;
- mdp5_mdss = devm_kzalloc(dev->dev, sizeof(*mdp5_mdss), GFP_KERNEL);
+ mdp5_mdss = devm_kzalloc(&pdev->dev, sizeof(*mdp5_mdss), GFP_KERNEL);
if (!mdp5_mdss) {
ret = -ENOMEM;
goto fail;
}
- mdp5_mdss->base.dev = dev;
+ mdp5_mdss->base.dev = &pdev->dev;
mdp5_mdss->mmio = msm_ioremap(pdev, "mdss_phys", "MDSS");
if (IS_ERR(mdp5_mdss->mmio)) {
@@ -226,27 +224,27 @@ int mdp5_mdss_init(struct drm_device *dev)
ret = msm_mdss_get_clocks(mdp5_mdss);
if (ret) {
- DRM_DEV_ERROR(dev->dev, "failed to get clocks: %d\n", ret);
+ DRM_DEV_ERROR(&pdev->dev, "failed to get clocks: %d\n", ret);
goto fail;
}
- ret = devm_request_irq(dev->dev, platform_get_irq(pdev, 0),
+ ret = devm_request_irq(&pdev->dev, platform_get_irq(pdev, 0),
mdss_irq, 0, "mdss_isr", mdp5_mdss);
if (ret) {
- DRM_DEV_ERROR(dev->dev, "failed to init irq: %d\n", ret);
+ DRM_DEV_ERROR(&pdev->dev, "failed to init irq: %d\n", ret);
goto fail;
}
ret = mdss_irq_domain_init(mdp5_mdss);
if (ret) {
- DRM_DEV_ERROR(dev->dev, "failed to init sub-block irqs: %d\n", ret);
+ DRM_DEV_ERROR(&pdev->dev, "failed to init sub-block irqs: %d\n", ret);
goto fail;
}
mdp5_mdss->base.funcs = &mdss_funcs;
priv->mdss = &mdp5_mdss->base;
- pm_runtime_enable(dev->dev);
+ pm_runtime_enable(&pdev->dev);
return 0;
fail:
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index f5596efd3819..ad35a5d94053 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -342,7 +342,6 @@ static int msm_drm_uninit(struct device *dev)
struct msm_drm_private *priv = platform_get_drvdata(pdev);
struct drm_device *ddev = priv->dev;
struct msm_kms *kms = priv->kms;
- struct msm_mdss *mdss = priv->mdss;
int i;
/*
@@ -402,9 +401,6 @@ static int msm_drm_uninit(struct device *dev)
component_unbind_all(dev, ddev);
- if (mdss && mdss->funcs)
- mdss->funcs->destroy(ddev);
-
ddev->dev_private = NULL;
drm_dev_put(ddev);
@@ -525,20 +521,6 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
ddev->dev_private = priv;
priv->dev = ddev;
- switch (get_mdp_ver(pdev)) {
- case KMS_MDP5:
- ret = mdp5_mdss_init(ddev);
- break;
- case KMS_DPU:
- ret = dpu_mdss_init(ddev);
- break;
- default:
- ret = 0;
- break;
- }
- if (ret)
- goto err_put_drm_dev;
-
mdss = priv->mdss;
priv->wq = alloc_ordered_workqueue("msm", 0);
@@ -561,12 +543,12 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
ret = msm_init_vram(ddev);
if (ret)
- goto err_destroy_mdss;
+ return ret;
/* Bind all our sub-components: */
ret = component_bind_all(dev, ddev);
if (ret)
- goto err_destroy_mdss;
+ return ret;
dma_set_max_seg_size(dev, UINT_MAX);
@@ -672,12 +654,6 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
err_msm_uninit:
msm_drm_uninit(dev);
return ret;
-err_destroy_mdss:
- if (mdss && mdss->funcs)
- mdss->funcs->destroy(ddev);
-err_put_drm_dev:
- drm_dev_put(ddev);
- return ret;
}
/*
@@ -1386,10 +1362,26 @@ static int msm_pdev_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, priv);
+ switch (get_mdp_ver(pdev)) {
+ case KMS_MDP5:
+ ret = mdp5_mdss_init(pdev);
+ break;
+ case KMS_DPU:
+ ret = dpu_mdss_init(pdev);
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ if (ret) {
+ platform_set_drvdata(pdev, NULL);
+ return ret;
+ }
+
if (get_mdp_ver(pdev)) {
ret = add_display_components(pdev, &match);
if (ret)
- return ret;
+ goto fail;
}
ret = add_gpu_components(&pdev->dev, &match);
@@ -1411,14 +1403,24 @@ static int msm_pdev_probe(struct platform_device *pdev)
fail:
of_platform_depopulate(&pdev->dev);
+
+ if (priv->mdss && priv->mdss->funcs)
+ priv->mdss->funcs->destroy(priv->mdss);
+
return ret;
}
static int msm_pdev_remove(struct platform_device *pdev)
{
+ struct msm_drm_private *priv = platform_get_drvdata(pdev);
+ struct msm_mdss *mdss = priv->mdss;
+
component_master_del(&pdev->dev, &msm_drm_ops);
of_platform_depopulate(&pdev->dev);
+ if (mdss && mdss->funcs)
+ mdss->funcs->destroy(mdss);
+
return 0;
}
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index 8b132c8b1513..2a4f0526cb98 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -204,16 +204,16 @@ extern const struct of_device_id mdp5_dt_match[];
struct msm_mdss_funcs {
int (*enable)(struct msm_mdss *mdss);
int (*disable)(struct msm_mdss *mdss);
- void (*destroy)(struct drm_device *dev);
+ void (*destroy)(struct msm_mdss *mdss);
};
struct msm_mdss {
- struct drm_device *dev;
+ struct device *dev;
const struct msm_mdss_funcs *funcs;
};
-int mdp5_mdss_init(struct drm_device *dev);
-int dpu_mdss_init(struct drm_device *dev);
+int mdp5_mdss_init(struct platform_device *dev);
+int dpu_mdss_init(struct platform_device *dev);
#define for_each_crtc_mask(dev, crtc, crtc_mask) \
drm_for_each_crtc(crtc, dev) \
--
2.33.0
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