introduce xlnx-dp

This is the implementation of the DisplayPort.
It has an aux-bus to access dpcd and edid.

Graphic plane is connected to the channel 3.
Video plane is connected to the channel 0.
Audio stream are connected to the channels 4 and 5.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Tested-By: Hyun Kwon <hyun.kwon@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1465833014-21982-9-git-send-email-fred.konrad@greensocs.com
[PMM: fixed format strings]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/display/Makefile.objs

@@ -44,3 +44,4 @@ virtio-gpu.o-libs += $(VIRGL_LIBS)
 virtio-gpu-3d.o-cflags := $(VIRGL_CFLAGS)
 virtio-gpu-3d.o-libs += $(VIRGL_LIBS)
 obj-$(CONFIG_DPCD) += dpcd.o
+obj-$(CONFIG_XLNX_ZYNQMP) += xlnx_dp.o

include/hw/display/xlnx_dp.h

@@ -0,0 +1,109 @@
+/*
+ * xlnx_dp.h
+ *
+ *  Copyright (C) 2015 : GreenSocs Ltd
+ *      http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ *  Developed by :
+ *  Frederic Konrad   <fred.konrad@greensocs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 "hw/sysbus.h"
+#include "ui/console.h"
+#include "hw/misc/aux.h"
+#include "hw/i2c/i2c.h"
+#include "hw/display/dpcd.h"
+#include "hw/i2c/i2c-ddc.h"
+#include "qemu/fifo8.h"
+#include "hw/dma/xlnx_dpdma.h"
+#include "audio/audio.h"
+
+#ifndef XLNX_DP_H
+#define XLNX_DP_H
+
+#define AUD_CHBUF_MAX_DEPTH                 32768
+#define MAX_QEMU_BUFFER_SIZE                4096
+
+#define DP_CORE_REG_ARRAY_SIZE              (0x3AF >> 2)
+#define DP_AVBUF_REG_ARRAY_SIZE             (0x238 >> 2)
+#define DP_VBLEND_REG_ARRAY_SIZE            (0x1DF >> 2)
+#define DP_AUDIO_REG_ARRAY_SIZE             (0x50 >> 2)
+
+struct PixmanPlane {
+    pixman_format_code_t format;
+    DisplaySurface *surface;
+};
+
+typedef struct XlnxDPState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /* < public >*/
+    MemoryRegion container;
+
+    uint32_t core_registers[DP_CORE_REG_ARRAY_SIZE];
+    MemoryRegion core_iomem;
+
+    uint32_t avbufm_registers[DP_AVBUF_REG_ARRAY_SIZE];
+    MemoryRegion avbufm_iomem;
+
+    uint32_t vblend_registers[DP_VBLEND_REG_ARRAY_SIZE];
+    MemoryRegion vblend_iomem;
+
+    uint32_t audio_registers[DP_AUDIO_REG_ARRAY_SIZE];
+    MemoryRegion audio_iomem;
+
+    QemuConsole *console;
+
+    /*
+     * This is the planes used to display in console. When the blending is
+     * enabled bout_plane is displayed in console else it's g_plane.
+     */
+    struct PixmanPlane g_plane;
+    struct PixmanPlane v_plane;
+    struct PixmanPlane bout_plane;
+
+    QEMUSoundCard aud_card;
+    SWVoiceOut *amixer_output_stream;
+    int16_t audio_buffer_0[AUD_CHBUF_MAX_DEPTH];
+    int16_t audio_buffer_1[AUD_CHBUF_MAX_DEPTH];
+    size_t audio_data_available[2];
+    int64_t temp_buffer[AUD_CHBUF_MAX_DEPTH];
+    int16_t out_buffer[AUD_CHBUF_MAX_DEPTH];
+    size_t byte_left; /* byte available in out_buffer. */
+    size_t data_ptr;  /* next byte to be sent to QEMU. */
+
+    /* Associated DPDMA controller. */
+    XlnxDPDMAState *dpdma;
+
+    qemu_irq irq;
+
+    AUXBus *aux_bus;
+    Fifo8 rx_fifo;
+    Fifo8 tx_fifo;
+
+    /*
+     * XXX: This should be in an other module.
+     */
+    DPCDState *dpcd;
+    I2CDDCState *edid;
+} XlnxDPState;
+
+#define TYPE_XLNX_DP "xlnx.v-dp"
+#define XLNX_DP(obj) OBJECT_CHECK(XlnxDPState, (obj), TYPE_XLNX_DP)
+
+#endif /* !XLNX_DP_H */