diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/edid.h')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/edid.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/edid.h b/drivers/gpu/drm/i915/gvt/edid.h new file mode 100644 index 000000000000..f6dfc8b795ec --- /dev/null +++ b/drivers/gpu/drm/i915/gvt/edid.h @@ -0,0 +1,150 @@ +/* + * 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> + * + */ + +#ifndef _GVT_EDID_H_ +#define _GVT_EDID_H_ + +#define EDID_SIZE 128 +#define EDID_ADDR 0x50 /* Linux hvm EDID addr */ + +#define GVT_AUX_NATIVE_WRITE 0x8 +#define GVT_AUX_NATIVE_READ 0x9 +#define GVT_AUX_I2C_WRITE 0x0 +#define GVT_AUX_I2C_READ 0x1 +#define GVT_AUX_I2C_STATUS 0x2 +#define GVT_AUX_I2C_MOT 0x4 +#define GVT_AUX_I2C_REPLY_ACK 0x0 + +struct intel_vgpu_edid_data { + bool data_valid; + unsigned char edid_block[EDID_SIZE]; +}; + +enum gmbus_cycle_type { + GMBUS_NOCYCLE = 0x0, + NIDX_NS_W = 0x1, + IDX_NS_W = 0x3, + GMBUS_STOP = 0x4, + NIDX_STOP = 0x5, + IDX_STOP = 0x7 +}; + +/* + * States of GMBUS + * + * GMBUS0-3 could be related to the EDID virtualization. Another two GMBUS + * registers, GMBUS4 (interrupt mask) and GMBUS5 (2 byte indes register), are + * not considered here. Below describes the usage of GMBUS registers that are + * cared by the EDID virtualization + * + * GMBUS0: + * R/W + * port selection. value of bit0 - bit2 corresponds to the GPIO registers. + * + * GMBUS1: + * R/W Protect + * Command and Status. + * bit0 is the direction bit: 1 is read; 0 is write. + * bit1 - bit7 is slave 7-bit address. + * bit16 - bit24 total byte count (ignore?) + * + * GMBUS2: + * Most of bits are read only except bit 15 (IN_USE) + * Status register + * bit0 - bit8 current byte count + * bit 11: hardware ready; + * + * GMBUS3: + * Read/Write + * Data for transfer + */ + +/* From hw specs, Other phases like START, ADDRESS, INDEX + * are invisible to GMBUS MMIO interface. So no definitions + * in below enum types + */ +enum gvt_gmbus_phase { + GMBUS_IDLE_PHASE = 0, + GMBUS_DATA_PHASE, + GMBUS_WAIT_PHASE, + //GMBUS_STOP_PHASE, + GMBUS_MAX_PHASE +}; + +struct intel_vgpu_i2c_gmbus { + unsigned int total_byte_count; /* from GMBUS1 */ + enum gmbus_cycle_type cycle_type; + enum gvt_gmbus_phase phase; +}; + +struct intel_vgpu_i2c_aux_ch { + bool i2c_over_aux_ch; + bool aux_ch_mot; +}; + +enum i2c_state { + I2C_NOT_SPECIFIED = 0, + I2C_GMBUS = 1, + I2C_AUX_CH = 2 +}; + +/* I2C sequences cannot interleave. + * GMBUS and AUX_CH sequences cannot interleave. + */ +struct intel_vgpu_i2c_edid { + enum i2c_state state; + + unsigned int port; + bool slave_selected; + bool edid_available; + unsigned int current_edid_read; + + struct intel_vgpu_i2c_gmbus gmbus; + struct intel_vgpu_i2c_aux_ch aux_ch; +}; + +void intel_vgpu_init_i2c_edid(struct intel_vgpu *vgpu); + +int intel_gvt_i2c_handle_gmbus_read(struct intel_vgpu *vgpu, + unsigned int offset, void *p_data, unsigned int bytes); + +int intel_gvt_i2c_handle_gmbus_write(struct intel_vgpu *vgpu, + unsigned int offset, void *p_data, unsigned int bytes); + +void intel_gvt_i2c_handle_aux_ch_write(struct intel_vgpu *vgpu, + int port_idx, + unsigned int offset, + void *p_data); + +#endif /*_GVT_EDID_H_*/ |