--- /dev/null
+/*
+ * 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;
+ }
+}
Code Review / kvmfornfv.git / blobdiff