diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/805-display-0015-drm-bridge-cadence-Add-support-for-periodically-poll.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/805-display-0015-drm-bridge-cadence-Add-support-for-periodically-poll.patch | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/805-display-0015-drm-bridge-cadence-Add-support-for-periodically-poll.patch b/target/linux/layerscape/patches-5.4/805-display-0015-drm-bridge-cadence-Add-support-for-periodically-poll.patch new file mode 100644 index 0000000000..80dc0cc3e5 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/805-display-0015-drm-bridge-cadence-Add-support-for-periodically-poll.patch @@ -0,0 +1,148 @@ +From 35e2ec234646f04eb0e17e4c3a4cf21faed3655a Mon Sep 17 00:00:00 2001 +From: Wen He <wen.he_1@nxp.com> +Date: Wed, 18 Sep 2019 11:05:31 +0800 +Subject: [PATCH] drm: bridge: cadence: Add support for periodically poll the + connector + +Normally, DP/HDMI PHY use HPD_IRQ to monitor the connector connection +status, but LS1028A doesn't support HPD_IRQ signals response. + +This patch allows periodically poll the connector for connection and +disconnection. + +Signed-off-by: Wen He <wen.he_1@nxp.com> +--- + drivers/gpu/drm/bridge/cadence/cdns-dp-core.c | 86 +++++++++++++++++---------- + include/drm/bridge/cdns-mhdp-common.h | 1 + + 2 files changed, 54 insertions(+), 33 deletions(-) + +--- a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c ++++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c +@@ -276,7 +276,11 @@ static int cdns_dp_bridge_attach(struct + + connector->interlace_allowed = 1; + +- connector->polled = DRM_CONNECTOR_POLL_HPD; ++ if (mhdp->is_hpd) ++ connector->polled = DRM_CONNECTOR_POLL_HPD; ++ else ++ connector->polled = DRM_CONNECTOR_POLL_CONNECT | ++ DRM_CONNECTOR_POLL_DISCONNECT; + + drm_connector_helper_add(connector, &cdns_dp_connector_helper_funcs); + +@@ -439,22 +443,34 @@ static int __cdns_dp_probe(struct platfo + INIT_DELAYED_WORK(&mhdp->hotplug_work, hotplug_work_func); + + iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); +- mhdp->regs_base = devm_ioremap(dev, iores->start, resource_size(iores)); +- if (IS_ERR(mhdp->regs_base)) +- return -ENOMEM; ++ if (iores) { ++ mhdp->regs_base = devm_ioremap(dev, iores->start, ++ resource_size(iores)); ++ if (IS_ERR(mhdp->regs_base)) ++ return -ENOMEM; ++ } + + iores = platform_get_resource(pdev, IORESOURCE_MEM, 1); +- mhdp->regs_sec = devm_ioremap(dev, iores->start, resource_size(iores)); +- if (IS_ERR(mhdp->regs_sec)) +- return -ENOMEM; ++ if (iores) { ++ mhdp->regs_sec = devm_ioremap(dev, iores->start, ++ resource_size(iores)); ++ if (IS_ERR(mhdp->regs_sec)) ++ return -ENOMEM; ++ } ++ ++ mhdp->is_hpd = true; + + mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in"); +- if (mhdp->irq[IRQ_IN] < 0) ++ if (mhdp->irq[IRQ_IN] < 0) { ++ mhdp->is_hpd = false; + dev_info(dev, "No plug_in irq number\n"); ++ } + + mhdp->irq[IRQ_OUT] = platform_get_irq_byname(pdev, "plug_out"); +- if (mhdp->irq[IRQ_OUT] < 0) ++ if (mhdp->irq[IRQ_OUT] < 0) { ++ mhdp->is_hpd = false; + dev_info(dev, "No plug_out irq number\n"); ++ } + + cdns_dp_parse_dt(mhdp); + +@@ -474,33 +490,37 @@ static int __cdns_dp_probe(struct platfo + cdns_mhdp_plat_call(mhdp, phy_set); + + /* Enable Hotplug Detect IRQ thread */ +- irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN); +- ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN], +- NULL, cdns_dp_irq_thread, +- IRQF_ONESHOT, dev_name(dev), +- mhdp); +- if (ret) { +- dev_err(dev, "can't claim irq %d\n", +- mhdp->irq[IRQ_IN]); +- return -EINVAL; +- } ++ if (mhdp->is_hpd) { ++ irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN); ++ ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN], ++ NULL, cdns_dp_irq_thread, ++ IRQF_ONESHOT, dev_name(dev), ++ mhdp); + +- irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN); +- ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT], +- NULL, cdns_dp_irq_thread, +- IRQF_ONESHOT, dev_name(dev), +- mhdp); +- if (ret) { +- dev_err(dev, "can't claim irq %d\n", +- mhdp->irq[IRQ_OUT]); +- return -EINVAL; ++ if (ret) { ++ dev_err(dev, "can't claim irq %d\n", ++ mhdp->irq[IRQ_IN]); ++ return -EINVAL; ++ } ++ ++ irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN); ++ ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT], ++ NULL, cdns_dp_irq_thread, ++ IRQF_ONESHOT, dev_name(dev), ++ mhdp); ++ ++ if (ret) { ++ dev_err(dev, "can't claim irq %d\n", ++ mhdp->irq[IRQ_OUT]); ++ return -EINVAL; ++ } ++ ++ if (cdns_mhdp_read_hpd(mhdp)) ++ enable_irq(mhdp->irq[IRQ_OUT]); ++ else ++ enable_irq(mhdp->irq[IRQ_IN]); + } + +- if (cdns_mhdp_read_hpd(mhdp)) +- enable_irq(mhdp->irq[IRQ_OUT]); +- else +- enable_irq(mhdp->irq[IRQ_IN]); +- + mhdp->bridge.base.driver_private = mhdp; + mhdp->bridge.base.funcs = &cdns_dp_bridge_funcs; + #ifdef CONFIG_OF +--- a/include/drm/bridge/cdns-mhdp-common.h ++++ b/include/drm/bridge/cdns-mhdp-common.h +@@ -683,6 +683,7 @@ struct cdns_mhdp_device { + bool link_up; + bool power_up; + bool plugged; ++ bool is_hpd; + struct mutex lock; + + int irq[IRQ_NUM]; |