diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c new file mode 100644 index 0000000000..ddcdd5e878 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + */ + +#include <drm/drm_print.h> +#include <drm/drm_vblank.h> + +#include "msm_drv.h" +#include "mdp4_kms.h" + +void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask, + uint32_t old_irqmask) +{ + mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_CLEAR, + irqmask ^ (irqmask & old_irqmask)); + mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask); +} + +static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus) +{ + struct mdp4_kms *mdp4_kms = container_of(irq, struct mdp4_kms, error_handler); + static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1); + extern bool dumpstate; + + DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus); + + if (dumpstate && __ratelimit(&rs)) { + struct drm_printer p = drm_info_printer(mdp4_kms->dev->dev); + drm_state_dump(mdp4_kms->dev, &p); + } +} + +void mdp4_irq_preinstall(struct msm_kms *kms) +{ + struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); + mdp4_enable(mdp4_kms); + mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff); + mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000); + mdp4_disable(mdp4_kms); +} + +int mdp4_irq_postinstall(struct msm_kms *kms) +{ + struct mdp_kms *mdp_kms = to_mdp_kms(kms); + struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms); + struct mdp_irq *error_handler = &mdp4_kms->error_handler; + + error_handler->irq = mdp4_irq_error_handler; + error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN | + MDP4_IRQ_EXTERNAL_INTF_UDERRUN; + + mdp_irq_register(mdp_kms, error_handler); + + return 0; +} + +void mdp4_irq_uninstall(struct msm_kms *kms) +{ + struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); + mdp4_enable(mdp4_kms); + mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000); + mdp4_disable(mdp4_kms); +} + +irqreturn_t mdp4_irq(struct msm_kms *kms) +{ + struct mdp_kms *mdp_kms = to_mdp_kms(kms); + struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms); + struct drm_device *dev = mdp4_kms->dev; + struct drm_crtc *crtc; + uint32_t status, enable; + + enable = mdp4_read(mdp4_kms, REG_MDP4_INTR_ENABLE); + status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS) & enable; + mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status); + + VERB("status=%08x", status); + + mdp_dispatch_irqs(mdp_kms, status); + + drm_for_each_crtc(crtc, dev) + if (status & mdp4_crtc_vblank(crtc)) + drm_crtc_handle_vblank(crtc); + + return IRQ_HANDLED; +} + +int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc) +{ + struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); + + mdp4_enable(mdp4_kms); + mdp_update_vblank_mask(to_mdp_kms(kms), + mdp4_crtc_vblank(crtc), true); + mdp4_disable(mdp4_kms); + + return 0; +} + +void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc) +{ + struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); + + mdp4_enable(mdp4_kms); + mdp_update_vblank_mask(to_mdp_kms(kms), + mdp4_crtc_vblank(crtc), false); + mdp4_disable(mdp4_kms); +} |