Currently the msm platform driver is a multiplex handling several cases: - headless GPU-only driver, - MDP4 with flat device nodes, - MDP5/DPU MDSS with all the nodes being children of MDSS node.
This results in not-so-perfect code, checking the hardware version (MDP4/MDP5/DPU) in several places, checking for mdss even when it can not exist, etc. Split the code into three handling subdrivers (mdp4, mdss and headless msm).
Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org --- drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 56 ++++++ drivers/gpu/drm/msm/msm_drv.c | 236 ++++------------------- drivers/gpu/drm/msm/msm_drv.h | 19 ++ drivers/gpu/drm/msm/msm_kms.h | 7 - drivers/gpu/drm/msm/msm_mdss.c | 178 ++++++++++++++++- 5 files changed, 287 insertions(+), 209 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c index 5a33bb148e9e..089914dd058f 100644 --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c @@ -569,3 +569,59 @@ static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev)
return &config; } + +static const struct dev_pm_ops mdp4_pm_ops = { + .prepare = msm_pm_prepare, + .complete = msm_pm_complete, +}; + +static int mdp4_probe(struct platform_device *pdev) +{ + struct msm_drm_private *priv; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + /* + * on MDP4 based platforms, the MDP platform device is the component + * master that adds other display interface components to itself. + */ + return msm_drv_probe(&pdev->dev, &pdev->dev); +} + +static int mdp4_remove(struct platform_device *pdev) +{ + component_master_del(&pdev->dev, &msm_drm_ops); + + return 0; +} + +static const struct of_device_id mdp4_dt_match[] = { + { .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mdp4_dt_match); + +static struct platform_driver mdp4_platform_driver = { + .probe = mdp4_probe, + .remove = mdp4_remove, + .shutdown = msm_drv_shutdown, + .driver = { + .name = "mdp4", + .of_match_table = mdp4_dt_match, + .pm = &mdp4_pm_ops, + }, +}; + +void __init msm_mdp4_register(void) +{ + platform_driver_register(&mdp4_platform_driver); +} + +void __exit msm_mdp4_unregister(void) +{ + platform_driver_unregister(&mdp4_platform_driver); +} diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index e978c29dc61a..93207a9eee81 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -458,10 +458,6 @@ static int msm_drm_uninit(struct device *dev) return 0; }
-#define KMS_MDP4 4 -#define KMS_MDP5 5 -#define KMS_DPU 3 - static int get_mdp_ver(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1146,50 +1142,7 @@ static const struct drm_driver msm_driver = { .patchlevel = MSM_VERSION_PATCHLEVEL, };
-static int __maybe_unused msm_runtime_suspend(struct device *dev) -{ - struct msm_drm_private *priv = dev_get_drvdata(dev); - struct msm_mdss *mdss = priv->mdss; - - DBG(""); - - if (mdss) - return msm_mdss_disable(mdss); - - return 0; -} - -static int __maybe_unused msm_runtime_resume(struct device *dev) -{ - struct msm_drm_private *priv = dev_get_drvdata(dev); - struct msm_mdss *mdss = priv->mdss; - - DBG(""); - - if (mdss) - return msm_mdss_enable(mdss); - - return 0; -} - -static int __maybe_unused msm_pm_suspend(struct device *dev) -{ - - if (pm_runtime_suspended(dev)) - return 0; - - return msm_runtime_suspend(dev); -} - -static int __maybe_unused msm_pm_resume(struct device *dev) -{ - if (pm_runtime_suspended(dev)) - return 0; - - return msm_runtime_resume(dev); -} - -static int __maybe_unused msm_pm_prepare(struct device *dev) +int msm_pm_prepare(struct device *dev) { struct msm_drm_private *priv = dev_get_drvdata(dev); struct drm_device *ddev = priv ? priv->dev : NULL; @@ -1200,7 +1153,7 @@ static int __maybe_unused msm_pm_prepare(struct device *dev) return drm_mode_config_helper_suspend(ddev); }
-static void __maybe_unused msm_pm_complete(struct device *dev) +void msm_pm_complete(struct device *dev) { struct msm_drm_private *priv = dev_get_drvdata(dev); struct drm_device *ddev = priv ? priv->dev : NULL; @@ -1212,8 +1165,6 @@ static void __maybe_unused msm_pm_complete(struct device *dev) }
static const struct dev_pm_ops msm_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(msm_pm_suspend, msm_pm_resume) - SET_RUNTIME_PM_OPS(msm_runtime_suspend, msm_runtime_resume, NULL) .prepare = msm_pm_prepare, .complete = msm_pm_complete, }; @@ -1237,25 +1188,11 @@ static int compare_of(struct device *dev, void *data) * is no external component that we need to add since LVDS is within MDP4 * itself. */ -static int add_components_mdp(struct device *mdp_dev, +static int add_components_mdp(struct device *master_dev, struct device *mdp_dev, struct component_match **matchptr) { struct device_node *np = mdp_dev->of_node; struct device_node *ep_node; - struct device *master_dev; - - /* - * on MDP4 based platforms, the MDP platform device is the component - * master that adds other display interface components to itself. - * - * on MDP5 based platforms, the MDSS platform device is the component - * master that adds MDP5 and other display interface components to - * itself. - */ - if (of_device_is_compatible(np, "qcom,mdp4")) - master_dev = mdp_dev; - else - master_dev = mdp_dev->parent;
for_each_endpoint_of_node(np, ep_node) { struct device_node *intf; @@ -1296,60 +1233,6 @@ static int add_components_mdp(struct device *mdp_dev, return 0; }
-static int find_mdp_node(struct device *dev, void *data) -{ - return of_match_node(dpu_dt_match, dev->of_node) || - of_match_node(mdp5_dt_match, dev->of_node); -} - -static int add_display_components(struct platform_device *pdev, - struct component_match **matchptr) -{ - struct device *mdp_dev; - struct device *dev = &pdev->dev; - int ret; - - /* - * MDP5/DPU based devices don't have a flat hierarchy. There is a top - * level parent: MDSS, and children: MDP5/DPU, DSI, HDMI, eDP etc. - * Populate the children devices, find the MDP5/DPU node, and then add - * the interfaces to our components list. - */ - switch (get_mdp_ver(pdev)) { - case KMS_MDP5: - case KMS_DPU: - ret = of_platform_populate(dev->of_node, NULL, NULL, dev); - if (ret) { - DRM_DEV_ERROR(dev, "failed to populate children devices\n"); - return ret; - } - - mdp_dev = device_find_child(dev, NULL, find_mdp_node); - if (!mdp_dev) { - DRM_DEV_ERROR(dev, "failed to find MDSS MDP node\n"); - of_platform_depopulate(dev); - return -ENODEV; - } - - put_device(mdp_dev); - - /* add the MDP component itself */ - drm_of_component_match_add(dev, matchptr, compare_of, - mdp_dev->of_node); - break; - case KMS_MDP4: - /* MDP4 */ - mdp_dev = dev; - break; - } - - ret = add_components_mdp(mdp_dev, matchptr); - if (ret) - of_platform_depopulate(dev); - - return ret; -} - /* * We don't know what's the best binding to link the gpu with the drm device. * Fow now, we just hunt for all the possible gpus that we support, and add them @@ -1390,104 +1273,70 @@ static void msm_drm_unbind(struct device *dev) msm_drm_uninit(dev); }
-static const struct component_master_ops msm_drm_ops = { +const struct component_master_ops msm_drm_ops = { .bind = msm_drm_bind, .unbind = msm_drm_unbind, };
-/* - * Platform driver: - */ - -static int msm_pdev_probe(struct platform_device *pdev) +int msm_drv_probe(struct device *master_dev, struct device *mdp_dev) { struct component_match *match = NULL; - struct msm_mdss *mdss; - struct msm_drm_private *priv; int ret;
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - platform_set_drvdata(pdev, priv); - - switch (get_mdp_ver(pdev)) { - case KMS_MDP5: - mdss = msm_mdss_init(pdev, true); - if (IS_ERR(mdss)) { - ret = PTR_ERR(mdss); - platform_set_drvdata(pdev, NULL); - - return ret; - } else { - priv->mdss = mdss; - pm_runtime_enable(&pdev->dev); - } - break; - case KMS_DPU: - mdss = msm_mdss_init(pdev, false); - if (IS_ERR(mdss)) { - ret = PTR_ERR(mdss); - platform_set_drvdata(pdev, NULL); - - return ret; - } else { - priv->mdss = mdss; - pm_runtime_enable(&pdev->dev); - } - break; - default: - break; - } + if (mdp_dev) { + /* add the MDP component itself */ + drm_of_component_match_add(master_dev, &match, compare_of, + mdp_dev->of_node);
- if (get_mdp_ver(pdev)) { - ret = add_display_components(pdev, &match); + ret = add_components_mdp(master_dev, mdp_dev, &match); if (ret) - goto fail; + return ret; }
- ret = add_gpu_components(&pdev->dev, &match); + ret = add_gpu_components(master_dev, &match); if (ret) - goto fail; + return ret;
/* on all devices that I am aware of, iommu's which can map * any address the cpu can see are used: */ - ret = dma_set_mask_and_coherent(&pdev->dev, ~0); + ret = dma_set_mask_and_coherent(master_dev, ~0); if (ret) - goto fail; + return ret;
- ret = component_master_add_with_match(&pdev->dev, &msm_drm_ops, match); + ret = component_master_add_with_match(master_dev, &msm_drm_ops, match); if (ret) - goto fail; + return ret;
return 0; +} + +/* + * Platform driver: + * Used only for headlesss GPU instances + */
-fail: - of_platform_depopulate(&pdev->dev); +static int msm_pdev_probe(struct platform_device *pdev) +{ + struct msm_drm_private *priv;
- if (priv->mdss) - msm_mdss_destroy(priv->mdss); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM;
- return ret; + platform_set_drvdata(pdev, priv); + + return msm_drv_probe(&pdev->dev, NULL); }
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) - msm_mdss_destroy(mdss);
return 0; }
-static void msm_pdev_shutdown(struct platform_device *pdev) +void msm_drv_shutdown(struct platform_device *pdev) { struct msm_drm_private *priv = platform_get_drvdata(pdev); struct drm_device *drm = priv ? priv->dev : NULL; @@ -1498,25 +1347,12 @@ static void msm_pdev_shutdown(struct platform_device *pdev) drm_atomic_helper_shutdown(drm); }
-static const struct of_device_id dt_match[] = { - { .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 }, - { .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 }, - { .compatible = "qcom,sdm845-mdss", .data = (void *)KMS_DPU }, - { .compatible = "qcom,sc7180-mdss", .data = (void *)KMS_DPU }, - { .compatible = "qcom,sc7280-mdss", .data = (void *)KMS_DPU }, - { .compatible = "qcom,sm8150-mdss", .data = (void *)KMS_DPU }, - { .compatible = "qcom,sm8250-mdss", .data = (void *)KMS_DPU }, - {} -}; -MODULE_DEVICE_TABLE(of, dt_match); - static struct platform_driver msm_platform_driver = { .probe = msm_pdev_probe, .remove = msm_pdev_remove, - .shutdown = msm_pdev_shutdown, + .shutdown = msm_drv_shutdown, .driver = { .name = "msm", - .of_match_table = dt_match, .pm = &msm_pm_ops, }, }; @@ -1533,6 +1369,8 @@ static int __init msm_drm_register(void) msm_hdmi_register(); msm_dp_register(); adreno_register(); + msm_mdp4_register(); + msm_mdss_register(); return platform_driver_register(&msm_platform_driver); }
@@ -1540,6 +1378,8 @@ static void __exit msm_drm_unregister(void) { DBG("fini"); platform_driver_unregister(&msm_platform_driver); + msm_mdss_unregister(); + msm_mdp4_unregister(); msm_dp_unregister(); msm_hdmi_unregister(); adreno_unregister(); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 7500742b7cbd..beddb29dc7f7 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -451,10 +451,18 @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display,
#endif
+#define KMS_MDP4 4 +#define KMS_MDP5 5 +#define KMS_DPU 3 + +void __init msm_mdp4_register(void); +void __exit msm_mdp4_unregister(void); void __init msm_mdp_register(void); void __exit msm_mdp_unregister(void); void __init msm_dpu_register(void); void __exit msm_dpu_unregister(void); +void __init msm_mdss_register(void); +void __exit msm_mdss_unregister(void);
#ifdef CONFIG_DEBUG_FS void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m); @@ -549,4 +557,15 @@ static inline unsigned long timeout_to_jiffies(const ktime_t *timeout) return clamp(remaining_jiffies, 0LL, (s64)INT_MAX); }
+/* Driver helpers */ + +extern const struct component_master_ops msm_drm_ops; + +int msm_pm_prepare(struct device *dev); +void msm_pm_complete(struct device *dev); + +int msm_drv_probe(struct device *master_dev, struct device *mdp_dev); +void msm_drv_shutdown(struct platform_device *pdev); + + #endif /* __MSM_DRV_H__ */ diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index 0c341660941a..13c2eb0b2bcf 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -201,13 +201,6 @@ struct msm_kms *dpu_kms_init(struct drm_device *dev); extern const struct of_device_id dpu_dt_match[]; extern const struct of_device_id mdp5_dt_match[];
-struct msm_mdss; - -struct msm_mdss *msm_mdss_init(struct platform_device *pdev, bool mdp5); -int msm_mdss_enable(struct msm_mdss *mdss); -int msm_mdss_disable(struct msm_mdss *mdss); -void msm_mdss_destroy(struct msm_mdss *mdss); - #define for_each_crtc_mask(dev, crtc, crtc_mask) \ drm_for_each_crtc(crtc, dev) \ for_each_if (drm_crtc_mask(crtc) & (crtc_mask)) diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c index 8766666cfffb..69b96683d673 100644 --- a/drivers/gpu/drm/msm/msm_mdss.c +++ b/drivers/gpu/drm/msm/msm_mdss.c @@ -8,6 +8,8 @@ #include <linux/irqdesc.h> #include <linux/irqchip/chained_irq.h>
+#include <drm/drm_of.h> + #include "msm_drv.h" #include "msm_kms.h"
@@ -127,7 +129,7 @@ static int _msm_mdss_irq_domain_add(struct msm_mdss *msm_mdss) return 0; }
-int msm_mdss_enable(struct msm_mdss *msm_mdss) +static int msm_mdss_enable(struct msm_mdss *msm_mdss) { int ret;
@@ -163,14 +165,14 @@ int msm_mdss_enable(struct msm_mdss *msm_mdss) return ret; }
-int msm_mdss_disable(struct msm_mdss *msm_mdss) +static int msm_mdss_disable(struct msm_mdss *msm_mdss) { clk_bulk_disable_unprepare(msm_mdss->num_clocks, msm_mdss->clocks);
return 0; }
-void msm_mdss_destroy(struct msm_mdss *msm_mdss) +static void msm_mdss_destroy(struct msm_mdss *msm_mdss) { struct platform_device *pdev = to_platform_device(msm_mdss->dev); int irq; @@ -228,7 +230,7 @@ int mdp5_mdss_parse_clock(struct platform_device *pdev, struct clk_bulk_data **c return num_clocks; }
-struct msm_mdss *msm_mdss_init(struct platform_device *pdev, bool mdp5) +static struct msm_mdss *msm_mdss_init(struct platform_device *pdev, bool mdp5) { struct msm_mdss *msm_mdss; int ret; @@ -269,3 +271,171 @@ struct msm_mdss *msm_mdss_init(struct platform_device *pdev, bool mdp5)
return msm_mdss; } + +static int __maybe_unused mdss_runtime_suspend(struct device *dev) +{ + struct msm_drm_private *priv = dev_get_drvdata(dev); + + DBG(""); + + return msm_mdss_disable(priv->mdss); +} + +static int __maybe_unused mdss_runtime_resume(struct device *dev) +{ + struct msm_drm_private *priv = dev_get_drvdata(dev); + + DBG(""); + + return msm_mdss_enable(priv->mdss); +} + +static int __maybe_unused mdss_pm_suspend(struct device *dev) +{ + + if (pm_runtime_suspended(dev)) + return 0; + + return mdss_runtime_suspend(dev); +} + +static int __maybe_unused mdss_pm_resume(struct device *dev) +{ + if (pm_runtime_suspended(dev)) + return 0; + + return mdss_runtime_resume(dev); +} + +static const struct dev_pm_ops mdss_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mdss_pm_suspend, mdss_pm_resume) + SET_RUNTIME_PM_OPS(mdss_runtime_suspend, mdss_runtime_resume, NULL) + .prepare = msm_pm_prepare, + .complete = msm_pm_complete, +}; + +static int get_mdp_ver(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + return (int) (unsigned long) of_device_get_match_data(dev); +} + +static int find_mdp_node(struct device *dev, void *data) +{ + return of_match_node(dpu_dt_match, dev->of_node) || + of_match_node(mdp5_dt_match, dev->of_node); +} + +static int mdss_probe(struct platform_device *pdev) +{ + struct msm_mdss *mdss; + struct msm_drm_private *priv; + int mdp_ver = get_mdp_ver(pdev); + struct device *mdp_dev; + struct device *dev = &pdev->dev; + int ret; + + if (mdp_ver != KMS_MDP5 && mdp_ver != KMS_DPU) + return -EINVAL; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + mdss = msm_mdss_init(pdev, mdp_ver == KMS_MDP5); + if (IS_ERR(mdss)) { + ret = PTR_ERR(mdss); + platform_set_drvdata(pdev, NULL); + + return ret; + } + + priv->mdss = mdss; + pm_runtime_enable(&pdev->dev); + + /* + * MDP5/DPU based devices don't have a flat hierarchy. There is a top + * level parent: MDSS, and children: MDP5/DPU, DSI, HDMI, eDP etc. + * Populate the children devices, find the MDP5/DPU node, and then add + * the interfaces to our components list. + */ + ret = of_platform_populate(dev->of_node, NULL, NULL, dev); + if (ret) { + DRM_DEV_ERROR(dev, "failed to populate children devices\n"); + goto fail; + } + + mdp_dev = device_find_child(dev, NULL, find_mdp_node); + if (!mdp_dev) { + DRM_DEV_ERROR(dev, "failed to find MDSS MDP node\n"); + of_platform_depopulate(dev); + ret = -ENODEV; + goto fail; + } + + /* + * on MDP5 based platforms, the MDSS platform device is the component + * master that adds MDP5 and other display interface components to + * itself. + */ + ret = msm_drv_probe(dev, mdp_dev); + put_device(mdp_dev); + if (ret) + goto fail; + + return 0; + +fail: + of_platform_depopulate(dev); + msm_mdss_destroy(priv->mdss); + + return ret; +} + +static int mdss_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); + + msm_mdss_destroy(mdss); + + return 0; +} + +static const struct of_device_id mdss_dt_match[] = { + { .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 }, + { .compatible = "qcom,sdm845-mdss", .data = (void *)KMS_DPU }, + { .compatible = "qcom,sc7180-mdss", .data = (void *)KMS_DPU }, + { .compatible = "qcom,sc7280-mdss", .data = (void *)KMS_DPU }, + { .compatible = "qcom,sm8150-mdss", .data = (void *)KMS_DPU }, + { .compatible = "qcom,sm8250-mdss", .data = (void *)KMS_DPU }, + {} +}; +MODULE_DEVICE_TABLE(of, dt_match); + +static struct platform_driver mdss_platform_driver = { + .probe = mdss_probe, + .remove = mdss_remove, + .shutdown = msm_drv_shutdown, + .driver = { + .name = "msm-mdss", + .of_match_table = mdss_dt_match, + .pm = &mdss_pm_ops, + }, +}; + +void __init msm_mdss_register(void) +{ + platform_driver_register(&mdss_platform_driver); +} + +void __exit msm_mdss_unregister(void) +{ + platform_driver_unregister(&mdss_platform_driver); +}