| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ |
| 4 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> |
| 5 | */ |
| 6 | |
| 7 | #include <linux/platform_device.h> |
| 8 | |
| 9 | #include <drm/drm_drv.h> |
| 10 | #include <drm/drm_print.h> |
| 11 | |
| 12 | #include "tidss_crtc.h" |
| 13 | #include "tidss_dispc.h" |
| 14 | #include "tidss_drv.h" |
| 15 | #include "tidss_irq.h" |
| 16 | #include "tidss_plane.h" |
| 17 | |
| 18 | /* call with wait_lock and dispc runtime held */ |
| 19 | static void tidss_irq_update(struct tidss_device *tidss) |
| 20 | { |
| 21 | assert_spin_locked(&tidss->wait_lock); |
| 22 | |
| 23 | dispc_set_irqenable(tidss->dispc, tidss->irq_mask); |
| 24 | } |
| 25 | |
| 26 | void tidss_irq_enable_vblank(struct drm_crtc *crtc) |
| 27 | { |
| 28 | struct drm_device *ddev = crtc->dev; |
| 29 | struct tidss_device *tidss = to_tidss(ddev); |
| 30 | struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); |
| 31 | u32 hw_videoport = tcrtc->hw_videoport; |
| 32 | unsigned long flags; |
| 33 | |
| 34 | spin_lock_irqsave(&tidss->wait_lock, flags); |
| 35 | tidss->irq_mask |= DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | |
| 36 | DSS_IRQ_VP_VSYNC_ODD(hw_videoport); |
| 37 | tidss_irq_update(tidss); |
| 38 | spin_unlock_irqrestore(&tidss->wait_lock, flags); |
| 39 | } |
| 40 | |
| 41 | void tidss_irq_disable_vblank(struct drm_crtc *crtc) |
| 42 | { |
| 43 | struct drm_device *ddev = crtc->dev; |
| 44 | struct tidss_device *tidss = to_tidss(ddev); |
| 45 | struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); |
| 46 | u32 hw_videoport = tcrtc->hw_videoport; |
| 47 | unsigned long flags; |
| 48 | |
| 49 | spin_lock_irqsave(&tidss->wait_lock, flags); |
| 50 | tidss->irq_mask &= ~(DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | |
| 51 | DSS_IRQ_VP_VSYNC_ODD(hw_videoport)); |
| 52 | tidss_irq_update(tidss); |
| 53 | spin_unlock_irqrestore(&tidss->wait_lock, flags); |
| 54 | } |
| 55 | |
| 56 | static irqreturn_t tidss_irq_handler(int irq, void *arg) |
| 57 | { |
| 58 | struct drm_device *ddev = (struct drm_device *)arg; |
| 59 | struct tidss_device *tidss = to_tidss(ddev); |
| 60 | unsigned int id; |
| 61 | dispc_irq_t irqstatus; |
| 62 | |
| 63 | irqstatus = dispc_read_and_clear_irqstatus(tidss->dispc); |
| 64 | |
| 65 | for (id = 0; id < tidss->num_crtcs; id++) { |
| 66 | struct drm_crtc *crtc = tidss->crtcs[id]; |
| 67 | struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); |
| 68 | u32 hw_videoport = tcrtc->hw_videoport; |
| 69 | |
| 70 | if (irqstatus & (DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | |
| 71 | DSS_IRQ_VP_VSYNC_ODD(hw_videoport))) |
| 72 | tidss_crtc_vblank_irq(crtc); |
| 73 | |
| 74 | if (irqstatus & (DSS_IRQ_VP_FRAME_DONE(hw_videoport))) |
| 75 | tidss_crtc_framedone_irq(crtc); |
| 76 | |
| 77 | if (irqstatus & DSS_IRQ_VP_SYNC_LOST(hw_videoport)) |
| 78 | tidss_crtc_error_irq(crtc, irqstatus); |
| 79 | } |
| 80 | |
| 81 | if (irqstatus & DSS_IRQ_DEVICE_OCP_ERR) |
| 82 | dev_err_ratelimited(tidss->dev, "OCP error\n"); |
| 83 | |
| 84 | return IRQ_HANDLED; |
| 85 | } |
| 86 | |
| 87 | void tidss_irq_resume(struct tidss_device *tidss) |
| 88 | { |
| 89 | unsigned long flags; |
| 90 | |
| 91 | spin_lock_irqsave(&tidss->wait_lock, flags); |
| 92 | tidss_irq_update(tidss); |
| 93 | spin_unlock_irqrestore(&tidss->wait_lock, flags); |
| 94 | } |
| 95 | |
| 96 | int tidss_irq_install(struct drm_device *ddev, unsigned int irq) |
| 97 | { |
| 98 | struct tidss_device *tidss = to_tidss(ddev); |
| 99 | int ret; |
| 100 | |
| 101 | if (irq == IRQ_NOTCONNECTED) |
| 102 | return -ENOTCONN; |
| 103 | |
| 104 | ret = request_irq(irq, tidss_irq_handler, 0, ddev->driver->name, ddev); |
| 105 | if (ret) |
| 106 | return ret; |
| 107 | |
| 108 | tidss->irq_mask = DSS_IRQ_DEVICE_OCP_ERR; |
| 109 | |
| 110 | for (unsigned int i = 0; i < tidss->num_crtcs; ++i) { |
| 111 | struct tidss_crtc *tcrtc = to_tidss_crtc(tidss->crtcs[i]); |
| 112 | |
| 113 | tidss->irq_mask |= DSS_IRQ_VP_SYNC_LOST(tcrtc->hw_videoport); |
| 114 | |
| 115 | tidss->irq_mask |= DSS_IRQ_VP_FRAME_DONE(tcrtc->hw_videoport); |
| 116 | } |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | void tidss_irq_uninstall(struct drm_device *ddev) |
| 122 | { |
| 123 | struct tidss_device *tidss = to_tidss(ddev); |
| 124 | |
| 125 | free_irq(tidss->irq, ddev); |
| 126 | } |