diff options
Diffstat (limited to 'drivers/gpu/drm/tidss/tidss_irq.c')
| -rw-r--r-- | drivers/gpu/drm/tidss/tidss_irq.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tidss/tidss_irq.c b/drivers/gpu/drm/tidss/tidss_irq.c new file mode 100644 index 000000000000..5abc788781f4 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_irq.c @@ -0,0 +1,138 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ + * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> + */ + +#include <linux/platform_device.h> + +#include <drm/drm_drv.h> +#include <drm/drm_print.h> + +#include "tidss_crtc.h" +#include "tidss_dispc.h" +#include "tidss_drv.h" +#include "tidss_irq.h" +#include "tidss_plane.h" + +static void tidss_irq_update(struct tidss_device *tidss) +{ + assert_spin_locked(&tidss->irq_lock); + + dispc_set_irqenable(tidss->dispc, tidss->irq_mask); +} + +void tidss_irq_enable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = to_tidss(ddev); + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + u32 hw_videoport = tcrtc->hw_videoport; + unsigned long flags; + + spin_lock_irqsave(&tidss->irq_lock, flags); + tidss->irq_mask |= DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | + DSS_IRQ_VP_VSYNC_ODD(hw_videoport); + tidss_irq_update(tidss); + spin_unlock_irqrestore(&tidss->irq_lock, flags); +} + +void tidss_irq_disable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = to_tidss(ddev); + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + u32 hw_videoport = tcrtc->hw_videoport; + unsigned long flags; + + spin_lock_irqsave(&tidss->irq_lock, flags); + tidss->irq_mask &= ~(DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | + DSS_IRQ_VP_VSYNC_ODD(hw_videoport)); + tidss_irq_update(tidss); + spin_unlock_irqrestore(&tidss->irq_lock, flags); +} + +static irqreturn_t tidss_irq_handler(int irq, void *arg) +{ + struct drm_device *ddev = (struct drm_device *)arg; + struct tidss_device *tidss = to_tidss(ddev); + unsigned int id; + dispc_irq_t irqstatus; + + spin_lock(&tidss->irq_lock); + irqstatus = dispc_read_and_clear_irqstatus(tidss->dispc); + spin_unlock(&tidss->irq_lock); + + for (id = 0; id < tidss->num_crtcs; id++) { + struct drm_crtc *crtc = tidss->crtcs[id]; + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + u32 hw_videoport = tcrtc->hw_videoport; + + if (irqstatus & (DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | + DSS_IRQ_VP_VSYNC_ODD(hw_videoport))) + tidss_crtc_vblank_irq(crtc); + + if (irqstatus & (DSS_IRQ_VP_FRAME_DONE(hw_videoport))) + tidss_crtc_framedone_irq(crtc); + + if (irqstatus & DSS_IRQ_VP_SYNC_LOST(hw_videoport)) + tidss_crtc_error_irq(crtc, irqstatus); + } + + for (unsigned int i = 0; i < tidss->num_planes; ++i) { + struct drm_plane *plane = tidss->planes[i]; + struct tidss_plane *tplane = to_tidss_plane(plane); + + if (irqstatus & DSS_IRQ_PLANE_FIFO_UNDERFLOW(tplane->hw_plane_id)) + tidss_plane_error_irq(plane, irqstatus); + } + + return IRQ_HANDLED; +} + +void tidss_irq_resume(struct tidss_device *tidss) +{ + unsigned long flags; + + spin_lock_irqsave(&tidss->irq_lock, flags); + tidss_irq_update(tidss); + spin_unlock_irqrestore(&tidss->irq_lock, flags); +} + +int tidss_irq_install(struct drm_device *ddev, unsigned int irq) +{ + struct tidss_device *tidss = to_tidss(ddev); + int ret; + + if (irq == IRQ_NOTCONNECTED) + return -ENOTCONN; + + ret = request_irq(irq, tidss_irq_handler, 0, ddev->driver->name, ddev); + if (ret) + return ret; + + tidss->irq_mask = 0; + + for (unsigned int i = 0; i < tidss->num_crtcs; ++i) { + struct tidss_crtc *tcrtc = to_tidss_crtc(tidss->crtcs[i]); + + tidss->irq_mask |= DSS_IRQ_VP_SYNC_LOST(tcrtc->hw_videoport); + + tidss->irq_mask |= DSS_IRQ_VP_FRAME_DONE(tcrtc->hw_videoport); + } + + for (unsigned int i = 0; i < tidss->num_planes; ++i) { + struct tidss_plane *tplane = to_tidss_plane(tidss->planes[i]); + + tidss->irq_mask |= DSS_IRQ_PLANE_FIFO_UNDERFLOW(tplane->hw_plane_id); + } + + return 0; +} + +void tidss_irq_uninstall(struct drm_device *ddev) +{ + struct tidss_device *tidss = to_tidss(ddev); + + free_irq(tidss->irq, ddev); +} |