diff options
Diffstat (limited to 'drivers/gpu/drm/msm/mdp/mdp5/mdp5_irq.c')
| -rw-r--r-- | drivers/gpu/drm/msm/mdp/mdp5/mdp5_irq.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_irq.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_irq.c new file mode 100644 index 000000000..33bd4c616 --- /dev/null +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_irq.c @@ -0,0 +1,203 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/irqdomain.h> +#include <linux/irq.h> + +#include "msm_drv.h" +#include "mdp5_kms.h" + +void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask) +{ + mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_MDP_INTR_EN(0), irqmask); +} + +static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus) +{ + DRM_ERROR("errors: %08x\n", irqstatus); +} + +void mdp5_irq_preinstall(struct msm_kms *kms) +{ + struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms)); + mdp5_enable(mdp5_kms); + mdp5_write(mdp5_kms, REG_MDP5_MDP_INTR_CLEAR(0), 0xffffffff); + mdp5_write(mdp5_kms, REG_MDP5_MDP_INTR_EN(0), 0x00000000); + mdp5_disable(mdp5_kms); +} + +int mdp5_irq_postinstall(struct msm_kms *kms) +{ + struct mdp_kms *mdp_kms = to_mdp_kms(kms); + struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms); + struct mdp_irq *error_handler = &mdp5_kms->error_handler; + + error_handler->irq = mdp5_irq_error_handler; + error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN | + MDP5_IRQ_INTF1_UNDER_RUN | + MDP5_IRQ_INTF2_UNDER_RUN | + MDP5_IRQ_INTF3_UNDER_RUN; + + mdp_irq_register(mdp_kms, error_handler); + + return 0; +} + +void mdp5_irq_uninstall(struct msm_kms *kms) +{ + struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms)); + mdp5_enable(mdp5_kms); + mdp5_write(mdp5_kms, REG_MDP5_MDP_INTR_EN(0), 0x00000000); + mdp5_disable(mdp5_kms); +} + +static void mdp5_irq_mdp(struct mdp_kms *mdp_kms) +{ + struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms); + struct drm_device *dev = mdp5_kms->dev; + struct msm_drm_private *priv = dev->dev_private; + unsigned int id; + uint32_t status; + + status = mdp5_read(mdp5_kms, REG_MDP5_MDP_INTR_STATUS(0)); + mdp5_write(mdp5_kms, REG_MDP5_MDP_INTR_CLEAR(0), status); + + VERB("status=%08x", status); + + mdp_dispatch_irqs(mdp_kms, status); + + for (id = 0; id < priv->num_crtcs; id++) + if (status & mdp5_crtc_vblank(priv->crtcs[id])) + drm_handle_vblank(dev, id); +} + +irqreturn_t mdp5_irq(struct msm_kms *kms) +{ + struct mdp_kms *mdp_kms = to_mdp_kms(kms); + struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms); + uint32_t intr; + + intr = mdp5_read(mdp5_kms, REG_MDSS_HW_INTR_STATUS); + + VERB("intr=%08x", intr); + + if (intr & MDSS_HW_INTR_STATUS_INTR_MDP) { + mdp5_irq_mdp(mdp_kms); + intr &= ~MDSS_HW_INTR_STATUS_INTR_MDP; + } + + while (intr) { + irq_hw_number_t hwirq = fls(intr) - 1; + generic_handle_irq(irq_find_mapping( + mdp5_kms->irqcontroller.domain, hwirq)); + intr &= ~(1 << hwirq); + } + + return IRQ_HANDLED; +} + +int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc) +{ + mdp_update_vblank_mask(to_mdp_kms(kms), + mdp5_crtc_vblank(crtc), true); + return 0; +} + +void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc) +{ + mdp_update_vblank_mask(to_mdp_kms(kms), + mdp5_crtc_vblank(crtc), false); +} + +/* + * interrupt-controller implementation, so sub-blocks (hdmi/eDP/dsi/etc) + * can register to get their irq's delivered + */ + +#define VALID_IRQS (MDSS_HW_INTR_STATUS_INTR_DSI0 | \ + MDSS_HW_INTR_STATUS_INTR_DSI1 | \ + MDSS_HW_INTR_STATUS_INTR_HDMI | \ + MDSS_HW_INTR_STATUS_INTR_EDP) + +static void mdp5_hw_mask_irq(struct irq_data *irqd) +{ + struct mdp5_kms *mdp5_kms = irq_data_get_irq_chip_data(irqd); + smp_mb__before_atomic(); + clear_bit(irqd->hwirq, &mdp5_kms->irqcontroller.enabled_mask); + smp_mb__after_atomic(); +} + +static void mdp5_hw_unmask_irq(struct irq_data *irqd) +{ + struct mdp5_kms *mdp5_kms = irq_data_get_irq_chip_data(irqd); + smp_mb__before_atomic(); + set_bit(irqd->hwirq, &mdp5_kms->irqcontroller.enabled_mask); + smp_mb__after_atomic(); +} + +static struct irq_chip mdp5_hw_irq_chip = { + .name = "mdp5", + .irq_mask = mdp5_hw_mask_irq, + .irq_unmask = mdp5_hw_unmask_irq, +}; + +static int mdp5_hw_irqdomain_map(struct irq_domain *d, + unsigned int irq, irq_hw_number_t hwirq) +{ + struct mdp5_kms *mdp5_kms = d->host_data; + + if (!(VALID_IRQS & (1 << hwirq))) + return -EPERM; + + irq_set_chip_and_handler(irq, &mdp5_hw_irq_chip, handle_level_irq); + irq_set_chip_data(irq, mdp5_kms); + set_irq_flags(irq, IRQF_VALID); + + return 0; +} + +static struct irq_domain_ops mdp5_hw_irqdomain_ops = { + .map = mdp5_hw_irqdomain_map, + .xlate = irq_domain_xlate_onecell, +}; + + +int mdp5_irq_domain_init(struct mdp5_kms *mdp5_kms) +{ + struct device *dev = mdp5_kms->dev->dev; + struct irq_domain *d; + + d = irq_domain_add_linear(dev->of_node, 32, + &mdp5_hw_irqdomain_ops, mdp5_kms); + if (!d) { + dev_err(dev, "mdp5 irq domain add failed\n"); + return -ENXIO; + } + + mdp5_kms->irqcontroller.enabled_mask = 0; + mdp5_kms->irqcontroller.domain = d; + + return 0; +} + +void mdp5_irq_domain_fini(struct mdp5_kms *mdp5_kms) +{ + if (mdp5_kms->irqcontroller.domain) { + irq_domain_remove(mdp5_kms->irqcontroller.domain); + mdp5_kms->irqcontroller.domain = NULL; + } +} |