summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/gvt/display.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/display.c')
-rw-r--r--drivers/gpu/drm/i915/gvt/display.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c
new file mode 100644
index 0000000..c0c884a
--- /dev/null
+++ b/drivers/gpu/drm/i915/gvt/display.c
@@ -0,0 +1,330 @@
+/*
+ * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ * Ke Yu
+ * Zhiyuan Lv <zhiyuan.lv@intel.com>
+ *
+ * Contributors:
+ * Terrence Xu <terrence.xu@intel.com>
+ * Changbin Du <changbin.du@intel.com>
+ * Bing Niu <bing.niu@intel.com>
+ * Zhi Wang <zhi.a.wang@intel.com>
+ *
+ */
+
+#include "i915_drv.h"
+#include "gvt.h"
+
+static int get_edp_pipe(struct intel_vgpu *vgpu)
+{
+ u32 data = vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP);
+ int pipe = -1;
+
+ switch (data & TRANS_DDI_EDP_INPUT_MASK) {
+ case TRANS_DDI_EDP_INPUT_A_ON:
+ case TRANS_DDI_EDP_INPUT_A_ONOFF:
+ pipe = PIPE_A;
+ break;
+ case TRANS_DDI_EDP_INPUT_B_ONOFF:
+ pipe = PIPE_B;
+ break;
+ case TRANS_DDI_EDP_INPUT_C_ONOFF:
+ pipe = PIPE_C;
+ break;
+ }
+ return pipe;
+}
+
+static int edp_pipe_is_enabled(struct intel_vgpu *vgpu)
+{
+ struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
+
+ if (!(vgpu_vreg(vgpu, PIPECONF(_PIPE_EDP)) & PIPECONF_ENABLE))
+ return 0;
+
+ if (!(vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP) & TRANS_DDI_FUNC_ENABLE))
+ return 0;
+ return 1;
+}
+
+static int pipe_is_enabled(struct intel_vgpu *vgpu, int pipe)
+{
+ struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
+
+ if (WARN_ON(pipe < PIPE_A || pipe >= I915_MAX_PIPES))
+ return -EINVAL;
+
+ if (vgpu_vreg(vgpu, PIPECONF(pipe)) & PIPECONF_ENABLE)
+ return 1;
+
+ if (edp_pipe_is_enabled(vgpu) &&
+ get_edp_pipe(vgpu) == pipe)
+ return 1;
+ return 0;
+}
+
+/* EDID with 1024x768 as its resolution */
+static unsigned char virtual_dp_monitor_edid[] = {
+ /*Header*/
+ 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
+ /* Vendor & Product Identification */
+ 0x22, 0xf0, 0x54, 0x29, 0x00, 0x00, 0x00, 0x00, 0x04, 0x17,
+ /* Version & Revision */
+ 0x01, 0x04,
+ /* Basic Display Parameters & Features */
+ 0xa5, 0x34, 0x20, 0x78, 0x23,
+ /* Color Characteristics */
+ 0xfc, 0x81, 0xa4, 0x55, 0x4d, 0x9d, 0x25, 0x12, 0x50, 0x54,
+ /* Established Timings: maximum resolution is 1024x768 */
+ 0x21, 0x08, 0x00,
+ /* Standard Timings. All invalid */
+ 0x00, 0xc0, 0x00, 0xc0, 0x00, 0x40, 0x00, 0x80, 0x00, 0x00,
+ 0x00, 0x40, 0x00, 0x00, 0x00, 0x01,
+ /* 18 Byte Data Blocks 1: invalid */
+ 0x00, 0x00, 0x80, 0xa0, 0x70, 0xb0,
+ 0x23, 0x40, 0x30, 0x20, 0x36, 0x00, 0x06, 0x44, 0x21, 0x00, 0x00, 0x1a,
+ /* 18 Byte Data Blocks 2: invalid */
+ 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3c, 0x18, 0x50, 0x11, 0x00, 0x0a,
+ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ /* 18 Byte Data Blocks 3: invalid */
+ 0x00, 0x00, 0x00, 0xfc, 0x00, 0x48,
+ 0x50, 0x20, 0x5a, 0x52, 0x32, 0x34, 0x34, 0x30, 0x77, 0x0a, 0x20, 0x20,
+ /* 18 Byte Data Blocks 4: invalid */
+ 0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x4e, 0x34, 0x33, 0x30, 0x34, 0x30,
+ 0x44, 0x58, 0x51, 0x0a, 0x20, 0x20,
+ /* Extension Block Count */
+ 0x00,
+ /* Checksum */
+ 0xef,
+};
+
+#define DPCD_HEADER_SIZE 0xb
+
+static u8 dpcd_fix_data[DPCD_HEADER_SIZE] = {
+ 0x11, 0x0a, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
+{
+ struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
+ vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTB_HOTPLUG_CPT |
+ SDE_PORTC_HOTPLUG_CPT |
+ SDE_PORTD_HOTPLUG_CPT);
+
+ if (IS_SKYLAKE(dev_priv))
+ vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT |
+ SDE_PORTE_HOTPLUG_SPT);
+
+ if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B))
+ vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;
+
+ if (intel_vgpu_has_monitor_on_port(vgpu, PORT_C))
+ vgpu_vreg(vgpu, SDEISR) |= SDE_PORTC_HOTPLUG_CPT;
+
+ if (intel_vgpu_has_monitor_on_port(vgpu, PORT_D))
+ vgpu_vreg(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
+
+ if (IS_SKYLAKE(dev_priv) &&
+ intel_vgpu_has_monitor_on_port(vgpu, PORT_E)) {
+ vgpu_vreg(vgpu, SDEISR) |= SDE_PORTE_HOTPLUG_SPT;
+ }
+
+ if (intel_vgpu_has_monitor_on_port(vgpu, PORT_A)) {
+ if (IS_BROADWELL(dev_priv))
+ vgpu_vreg(vgpu, GEN8_DE_PORT_ISR) |=
+ GEN8_PORT_DP_A_HOTPLUG;
+ else
+ vgpu_vreg(vgpu, SDEISR) |= SDE_PORTA_HOTPLUG_SPT;
+ }
+}
+
+static void clean_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num)
+{
+ struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
+
+ kfree(port->edid);
+ port->edid = NULL;
+
+ kfree(port->dpcd);
+ port->dpcd = NULL;
+}
+
+static int setup_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num,
+ int type)
+{
+ struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
+
+ port->edid = kzalloc(sizeof(*(port->edid)), GFP_KERNEL);
+ if (!port->edid)
+ return -ENOMEM;
+
+ port->dpcd = kzalloc(sizeof(*(port->dpcd)), GFP_KERNEL);
+ if (!port->dpcd) {
+ kfree(port->edid);
+ return -ENOMEM;
+ }
+
+ memcpy(port->edid->edid_block, virtual_dp_monitor_edid,
+ EDID_SIZE);
+ port->edid->data_valid = true;
+
+ memcpy(port->dpcd->data, dpcd_fix_data, DPCD_HEADER_SIZE);
+ port->dpcd->data_valid = true;
+ port->dpcd->data[DPCD_SINK_COUNT] = 0x1;
+ port->type = type;
+
+ emulate_monitor_status_change(vgpu);
+ return 0;
+}
+
+/**
+ * intel_gvt_check_vblank_emulation - check if vblank emulation timer should
+ * be turned on/off when a virtual pipe is enabled/disabled.
+ * @gvt: a GVT device
+ *
+ * This function is used to turn on/off vblank timer according to currently
+ * enabled/disabled virtual pipes.
+ *
+ */
+void intel_gvt_check_vblank_emulation(struct intel_gvt *gvt)
+{
+ struct intel_gvt_irq *irq = &gvt->irq;
+ struct intel_vgpu *vgpu;
+ bool have_enabled_pipe = false;
+ int pipe, id;
+
+ if (WARN_ON(!mutex_is_locked(&gvt->lock)))
+ return;
+
+ hrtimer_cancel(&irq->vblank_timer.timer);
+
+ for_each_active_vgpu(gvt, vgpu, id) {
+ for (pipe = 0; pipe < I915_MAX_PIPES; pipe++) {
+ have_enabled_pipe =
+ pipe_is_enabled(vgpu, pipe);
+ if (have_enabled_pipe)
+ break;
+ }
+ }
+
+ if (have_enabled_pipe)
+ hrtimer_start(&irq->vblank_timer.timer,
+ ktime_add_ns(ktime_get(), irq->vblank_timer.period),
+ HRTIMER_MODE_ABS);
+}
+
+static void emulate_vblank_on_pipe(struct intel_vgpu *vgpu, int pipe)
+{
+ struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
+ struct intel_vgpu_irq *irq = &vgpu->irq;
+ int vblank_event[] = {
+ [PIPE_A] = PIPE_A_VBLANK,
+ [PIPE_B] = PIPE_B_VBLANK,
+ [PIPE_C] = PIPE_C_VBLANK,
+ };
+ int event;
+
+ if (pipe < PIPE_A || pipe > PIPE_C)
+ return;
+
+ for_each_set_bit(event, irq->flip_done_event[pipe],
+ INTEL_GVT_EVENT_MAX) {
+ clear_bit(event, irq->flip_done_event[pipe]);
+ if (!pipe_is_enabled(vgpu, pipe))
+ continue;
+
+ vgpu_vreg(vgpu, PIPE_FLIPCOUNT_G4X(pipe))++;
+ intel_vgpu_trigger_virtual_event(vgpu, event);
+ }
+
+ if (pipe_is_enabled(vgpu, pipe)) {
+ vgpu_vreg(vgpu, PIPE_FRMCOUNT_G4X(pipe))++;
+ intel_vgpu_trigger_virtual_event(vgpu, vblank_event[pipe]);
+ }
+}
+
+static void emulate_vblank(struct intel_vgpu *vgpu)
+{
+ int pipe;
+
+ for_each_pipe(vgpu->gvt->dev_priv, pipe)
+ emulate_vblank_on_pipe(vgpu, pipe);
+}
+
+/**
+ * intel_gvt_emulate_vblank - trigger vblank events for vGPUs on GVT device
+ * @gvt: a GVT device
+ *
+ * This function is used to trigger vblank interrupts for vGPUs on GVT device
+ *
+ */
+void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
+{
+ struct intel_vgpu *vgpu;
+ int id;
+
+ if (WARN_ON(!mutex_is_locked(&gvt->lock)))
+ return;
+
+ for_each_active_vgpu(gvt, vgpu, id)
+ emulate_vblank(vgpu);
+}
+
+/**
+ * intel_vgpu_clean_display - clean vGPU virtual display emulation
+ * @vgpu: a vGPU
+ *
+ * This function is used to clean vGPU virtual display emulation stuffs
+ *
+ */
+void intel_vgpu_clean_display(struct intel_vgpu *vgpu)
+{
+ struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
+
+ if (IS_SKYLAKE(dev_priv))
+ clean_virtual_dp_monitor(vgpu, PORT_D);
+ else
+ clean_virtual_dp_monitor(vgpu, PORT_B);
+}
+
+/**
+ * intel_vgpu_init_display- initialize vGPU virtual display emulation
+ * @vgpu: a vGPU
+ *
+ * This function is used to initialize vGPU virtual display emulation stuffs
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ *
+ */
+int intel_vgpu_init_display(struct intel_vgpu *vgpu)
+{
+ struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
+
+ intel_vgpu_init_i2c_edid(vgpu);
+
+ if (IS_SKYLAKE(dev_priv))
+ return setup_virtual_dp_monitor(vgpu, PORT_D, GVT_DP_D);
+ else
+ return setup_virtual_dp_monitor(vgpu, PORT_B, GVT_DP_B);
+}
OpenPOWER on IntegriCloud