Configure HPD registers and interrupts to detect connect and disconnect pulses on HPD pin and issue hot plug accordingly. This patch depends on: https://patchwork.kernel.org/patch/11468511 https://patchwork.kernel.org/patch/11468715 https://patchwork.kernel.org/patch/11468519 https://patchwork.kernel.org/patch/11468515 Signed-off-by: Tanmay Shah <tanmay@xxxxxxxxxxxxxx> --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 18 ++++++ drivers/gpu/drm/msm/dp/dp_catalog.c | 69 +++++++++++++------- drivers/gpu/drm/msm/dp/dp_catalog.h | 5 +- drivers/gpu/drm/msm/dp/dp_ctrl.c | 1 - drivers/gpu/drm/msm/dp/dp_display.c | 110 +++++++++++++++++++++++++++++--- drivers/gpu/drm/msm/dp/dp_hpd.h | 3 + drivers/gpu/drm/msm/dp/dp_parser.c | 28 ++++++++ drivers/gpu/drm/msm/dp/dp_parser.h | 7 +- drivers/gpu/drm/msm/dp/dp_reg.h | 12 ++++ drivers/gpu/drm/msm/msm_drv.h | 6 ++ 10 files changed, 222 insertions(+), 37 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 3440566..31d53be 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -765,6 +765,23 @@ static void dpu_irq_preinstall(struct msm_kms *kms) dpu_core_irq_preinstall(dpu_kms); } +static int dpu_irq_postinstall(struct msm_kms *kms) +{ + struct msm_drm_private *priv; + struct dpu_kms *dpu_kms = to_dpu_kms(kms); + + if (!dpu_kms || !dpu_kms->dev) + return -EINVAL; + + priv = dpu_kms->dev->dev_private; + if (!priv) + return -EINVAL; + + msm_dp_irq_postinstall(priv->dp); + + return 0; +} + static void dpu_irq_uninstall(struct msm_kms *kms) { struct dpu_kms *dpu_kms = to_dpu_kms(kms); @@ -775,6 +792,7 @@ static void dpu_irq_uninstall(struct msm_kms *kms) static const struct msm_kms_funcs kms_funcs = { .hw_init = dpu_kms_hw_init, .irq_preinstall = dpu_irq_preinstall, + .irq_postinstall = dpu_irq_postinstall, .irq_uninstall = dpu_irq_uninstall, .irq = dpu_irq, .enable_commit = dpu_kms_enable_commit, diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 0714868..7987eb3 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -16,7 +16,6 @@ #define POLLING_SLEEP_US 1000 #define POLLING_TIMEOUT_US 10000 -#define REFTIMER_DEFAULT_VALUE 0x20000 #define SCRAMBLER_RESET_COUNT_VALUE 0xFC #define DP_INTERRUPT_STATUS_ACK_SHIFT 1 @@ -703,35 +702,57 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, } } -void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog, bool en) +void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, + u32 intr_mask, bool en) { struct dp_catalog_private *catalog = container_of(dp_catalog, struct dp_catalog_private, dp_catalog); - if (en) { - u32 reftimer = dp_read_aux(catalog, REG_DP_DP_HPD_REFTIMER); + u32 config = dp_read_aux(catalog, REG_DP_DP_HPD_INT_MASK); - dp_write_aux(catalog, REG_DP_DP_HPD_INT_ACK, - DP_DP_HPD_PLUG_INT_ACK | - DP_DP_IRQ_HPD_INT_ACK | - DP_DP_HPD_REPLUG_INT_ACK | - DP_DP_HPD_UNPLUG_INT_ACK); - dp_write_aux(catalog, REG_DP_DP_HPD_INT_MASK, - DP_DP_HPD_PLUG_INT_MASK | - DP_DP_IRQ_HPD_INT_MASK | - DP_DP_HPD_REPLUG_INT_MASK | - DP_DP_HPD_UNPLUG_INT_MASK); + config = (en ? config | intr_mask : config & ~intr_mask); - /* Configure REFTIMER */ - reftimer |= REFTIMER_DEFAULT_VALUE; - dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer); - /* Enable HPD */ - dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, - DP_DP_HPD_CTRL_HPD_EN); - } else { - /* Disable HPD */ - dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, 0x0); - } + dp_write_aux(catalog, REG_DP_DP_HPD_INT_MASK, + config & DP_DP_HPD_INT_MASK); +} + +void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + u32 reftimer = dp_read_aux(catalog, REG_DP_DP_HPD_REFTIMER); + + /* enable HPD interrupts */ + dp_catalog_hpd_config_intr(dp_catalog, + DP_DP_HPD_PLUG_INT_MASK | DP_DP_IRQ_HPD_INT_MASK + | DP_DP_HPD_UNPLUG_INT_MASK, true); + + /* Configure REFTIMER and enable it */ + reftimer |= DP_DP_HPD_REFTIMER_ENABLE; + dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer); + + /* connect time is 250us and disconnect time is 2ms */ + dp_write_aux(catalog, REG_DP_DP_HPD_EVENT_TIME_0, + DP_DP_HPD_EVENT_TIME_0_VAL); + dp_write_aux(catalog, REG_DP_DP_HPD_EVENT_TIME_1, + DP_DP_HPD_EVENT_TIME_1_VAL); + + /* Enable HPD */ + dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); +} + +u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + int isr = 0; + + isr = dp_read_aux(catalog, REG_DP_DP_HPD_INT_STATUS); + dp_write_aux(catalog, REG_DP_DP_HPD_INT_ACK, + (isr & DP_DP_HPD_INT_MASK)); + + return isr; } int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 86b82d4..23d1cec 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -60,7 +60,10 @@ void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate, void dp_catalog_ctrl_usb_reset(struct dp_catalog *dp_catalog, bool flip); bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); -void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog, bool enable); +void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, + u32 intr_mask, bool en); +void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); +u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_phy_lane_cfg(struct dp_catalog *dp_catalog, bool flipped, u8 lane_cnt); diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index aaa7bc8..fa15d65 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1568,7 +1568,6 @@ int dp_ctrl_on(struct dp_ctrl *dp_ctrl) rate = ctrl->panel->link_info.rate; dp_power_clk_enable(ctrl->power, DP_CORE_PM, true); - dp_catalog_ctrl_hpd_config(ctrl->catalog, true); if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) { DRM_DEBUG_DP("using phy test link parameters\n"); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index ddcb9fc..0cc94ca 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -17,6 +17,7 @@ #include "dp_power.h" #include "dp_catalog.h" #include "dp_aux.h" +#include "dp_reg.h" #include "dp_link.h" #include "dp_panel.h" #include "dp_ctrl.h" @@ -35,6 +36,7 @@ struct dp_display_private { bool power_on; bool hpd_irq_on; bool audio_supported; + atomic_t hpd_isr_status; struct platform_device *pdev; struct dentry *root; @@ -52,6 +54,8 @@ struct dp_display_private { struct dp_usbpd_cb usbpd_cb; struct dp_display_mode dp_mode; struct msm_dp dp_display; + + struct delayed_work config_hpd_work; }; static const struct of_device_id dp_dt_match[] = { @@ -102,6 +106,20 @@ static int dp_get_pll(struct dp_display_private *dp_priv) static irqreturn_t dp_display_irq(int irq, void *dev_id) { struct dp_display_private *dp = dev_id; + irqreturn_t ret = IRQ_HANDLED; + u32 hpd_isr_status; + + if (!dp) { + DRM_ERROR("invalid data\n"); + return IRQ_NONE; + } + + hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog); + + if (hpd_isr_status & DP_DP_HPD_INT_MASK) { + atomic_set(&dp->hpd_isr_status, hpd_isr_status); + ret = IRQ_WAKE_THREAD; + } /* DP controller isr */ dp_ctrl_isr(dp->ctrl); @@ -109,6 +127,54 @@ static irqreturn_t dp_display_irq(int irq, void *dev_id) /* DP aux isr */ dp_aux_isr(dp->aux); + return ret; +} + +static irqreturn_t dp_display_hpd_isr_work(int irq, void *data) +{ + struct dp_display_private *dp; + struct dp_usbpd *hpd; + u32 isr = 0; + + dp = (struct dp_display_private *)data; + if (!dp) + return IRQ_NONE; + + isr = atomic_read(&dp->hpd_isr_status); + + /* reset to default */ + atomic_set(&dp->hpd_isr_status, 0); + + hpd = dp->usbpd; + if (!hpd) + return IRQ_NONE; + + if (isr & DP_DP_HPD_PLUG_INT_MASK && + isr & DP_DP_HPD_STATE_STATUS_CONNECTED) { + hpd->hpd_high = 1; + dp->usbpd_cb.configure(&dp->pdev->dev); + } else if (isr & DP_DP_HPD_UNPLUG_INT_MASK && + (isr & DP_DP_HPD_STATE_STATUS_MASK) == + DP_DP_HPD_STATE_STATUS_DISCONNECTED) { + + /* disable HPD plug interrupt until disconnect is done + */ + dp_catalog_hpd_config_intr(dp->catalog, + DP_DP_HPD_PLUG_INT_MASK | DP_DP_IRQ_HPD_INT_MASK, + false); + + hpd->hpd_high = 0; + + /* We don't need separate work for disconnect as + * connect/attention interrupts are disabled + */ + dp->usbpd_cb.disconnect(&dp->pdev->dev); + + dp_catalog_hpd_config_intr(dp->catalog, + DP_DP_HPD_PLUG_INT_MASK | DP_DP_IRQ_HPD_INT_MASK, + true); + } + return IRQ_HANDLED; } @@ -245,8 +311,6 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) int rc = 0; struct edid *edid; - dp_aux_init(dp->aux, dp->parser->aux_cfg); - if (dp->link->psm_enabled) goto notify; @@ -293,7 +357,7 @@ static void dp_display_host_init(struct dp_display_private *dp) dp_power_init(dp->power, flip); dp_ctrl_host_init(dp->ctrl, flip); - enable_irq(dp->irq); + dp_aux_init(dp->aux, dp->parser->aux_cfg); dp->core_initialized = true; } @@ -304,10 +368,6 @@ static void dp_display_host_deinit(struct dp_display_private *dp) return; } - dp_ctrl_host_deinit(dp->ctrl); - dp_aux_deinit(dp->aux); - dp_power_deinit(dp->power); - disable_irq(dp->irq); dp->core_initialized = false; } @@ -649,7 +709,8 @@ int dp_display_request_irq(struct msm_dp *dp_display) return rc; } - rc = devm_request_irq(&dp->pdev->dev, dp->irq, dp_display_irq, + rc = devm_request_threaded_irq(&dp->pdev->dev, dp->irq, + dp_display_irq, dp_display_hpd_isr_work, IRQF_TRIGGER_HIGH, "dp_display_isr", dp); if (rc < 0) { DRM_ERROR("failed to request IRQ%u: %d\n", @@ -820,6 +881,39 @@ void __exit msm_dp_unregister(void) platform_driver_unregister(&dp_display_driver); } +static void dp_display_config_hpd_work(struct work_struct *work) +{ + struct dp_display_private *dp; + struct delayed_work *dw = to_delayed_work(work); + + dp = container_of(dw, struct dp_display_private, config_hpd_work); + + dp_display_host_init(dp); + dp_catalog_ctrl_hpd_config(dp->catalog); + + /* set default to 0 */ + atomic_set(&dp->hpd_isr_status, 0); + + /* Enable interrupt first time + * we are leaving dp clocks on during disconnect + * and never disable interrupt + */ + enable_irq(dp->irq); +} + +void msm_dp_irq_postinstall(struct msm_dp *dp_display) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + if (!dp->parser->hpd_gpio) + return; + + INIT_DELAYED_WORK(&dp->config_hpd_work, dp_display_config_hpd_work); + queue_delayed_work(system_wq, &dp->config_hpd_work, HZ * 10); +} + int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder) { diff --git a/drivers/gpu/drm/msm/dp/dp_hpd.h b/drivers/gpu/drm/msm/dp/dp_hpd.h index c0178524..d06a0b7 100644 --- a/drivers/gpu/drm/msm/dp/dp_hpd.h +++ b/drivers/gpu/drm/msm/dp/dp_hpd.h @@ -10,6 +10,9 @@ #include <linux/types.h> #include <linux/device.h> +#include <linux/of_gpio.h> + +#include "dp_parser.h" enum plug_orientation { ORIENTATION_NONE, diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index dbf64ee..08c1abe 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -241,6 +241,19 @@ static int dp_parser_pinctrl(struct dp_parser *parser) return -EINVAL; } + if (parser->hpd_gpio) { + pinctrl->state_hpd_active = pinctrl_lookup_state(pinctrl->pin, + "mdss_dp_hpd_ctrl"); + if (IS_ERR_OR_NULL(pinctrl->state_hpd_active)) { + DRM_ERROR("failed to get dp hpd pinctrl state %d\n", + PTR_ERR_OR_ZERO(pinctrl->state_hpd_active)); + return -EINVAL; + } + + return pinctrl_select_state(pinctrl->pin, + pinctrl->state_hpd_active); + } + pinctrl->state_active = pinctrl_lookup_state(pinctrl->pin, "mdss_dp_active"); if (IS_ERR(pinctrl->state_active)) { @@ -265,6 +278,15 @@ static int dp_parser_gpio(struct dp_parser *parser) struct device *dev = &parser->pdev->dev; struct device_node *of_node = dev->of_node; + if (of_find_property(of_node, "qcom,dp-hpd-gpio", NULL)) { + parser->hpd_gpio = of_get_named_gpio(of_node, + "qcom,dp-hpd-gpio", 0); + parser->usbplug_cc_gpio = -EINVAL; + parser->aux_en_gpio = -EINVAL; + parser->aux_sel_gpio = -EINVAL; + return 0; + } + parser->usbplug_cc_gpio = of_get_named_gpio(of_node, "usbplug-cc-gpio", 0); if (!gpio_is_valid(parser->usbplug_cc_gpio)) { @@ -455,6 +477,12 @@ static int dp_parser_parse(struct dp_parser *parser) } rc = dp_parser_pinctrl(parser); + + if (rc) + parser->hpd_gpio = -EINVAL; + else if (parser->hpd_gpio >= 0) + parser->combo_phy_en = false; + return rc; } diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 1539866..f9c572e 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -187,9 +187,10 @@ struct dp_parser { struct platform_device *pdev; struct dss_module_power mp[DP_MAX_PM]; struct dp_pinctrl pinctrl; - unsigned int aux_en_gpio; - unsigned int aux_sel_gpio; - unsigned int usbplug_cc_gpio; + int aux_en_gpio; + int aux_sel_gpio; + int usbplug_cc_gpio; + int hpd_gpio; bool combo_phy_en; struct dp_io io; struct dp_display_data disp_data; diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 28c1682..fbc1874 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -38,10 +38,22 @@ #define DP_DP_IRQ_HPD_INT_MASK (0x00000002) #define DP_DP_HPD_REPLUG_INT_MASK (0x00000004) #define DP_DP_HPD_UNPLUG_INT_MASK (0x00000008) +#define DP_DP_HPD_INT_MASK (DP_DP_HPD_PLUG_INT_MASK | \ + DP_DP_IRQ_HPD_INT_MASK | \ + DP_DP_HPD_REPLUG_INT_MASK | \ + DP_DP_HPD_UNPLUG_INT_MASK) +#define DP_DP_HPD_STATE_STATUS_CONNECTED (0x40000000) +#define DP_DP_HPD_STATE_STATUS_PENDING (0x20000000) +#define DP_DP_HPD_STATE_STATUS_DISCONNECTED (0x00000000) +#define DP_DP_HPD_STATE_STATUS_MASK (0xE0000000) #define REG_DP_DP_HPD_REFTIMER (0x00000018) +#define DP_DP_HPD_REFTIMER_ENABLE (1 << 16) + #define REG_DP_DP_HPD_EVENT_TIME_0 (0x0000001C) #define REG_DP_DP_HPD_EVENT_TIME_1 (0x00000020) +#define DP_DP_HPD_EVENT_TIME_0_VAL (0x3E800FA) +#define DP_DP_HPD_EVENT_TIME_1_VAL (0x1F407D0) #define REG_DP_AUX_CTRL (0x00000030) #define DP_AUX_CTRL_ENABLE (0x00000001) diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index d72694c..15a33b2 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -387,6 +387,7 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); +void msm_dp_irq_postinstall(struct msm_dp *dp_display); #else static inline int __init msm_dp_register(void) @@ -418,6 +419,11 @@ static inline void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_display_mode *adjusted_mode) { } + +static void msm_dp_irq_postinstall(struct msm_dp *dp_display) +{ +} + #endif void __init msm_mdp_register(void); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
