This patch adds a new file for lspcon with some basic stuff like: - Some read/wrire addresses for lspcon device - Basic read/write functions, using i2c over aux channel - Utility functions to get lspcon/encoder/connector
Signed-off-by: Shashank Sharma <[email protected]> Signed-off-by: Akashdeep Sharma <[email protected]> --- drivers/gpu/drm/i915/Makefile | 3 +- drivers/gpu/drm/i915/intel_lspcon.c | 114 ++++++++++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/i915/intel_lspcon.c diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 5558a03..00a531a 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -90,7 +90,8 @@ i915-y += dvo_ch7017.o \ intel_lvds.o \ intel_panel.o \ intel_sdvo.o \ - intel_tv.o + intel_tv.o \ + intel_lspcon.o # virtual gpu code i915-y += i915_vgpu.o diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c new file mode 100644 index 0000000..f5c91db --- /dev/null +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -0,0 +1,114 @@ +/* + * Copyright © 2016 Intel Corporation + * + * 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: + * Shashank Sharma <[email protected]> + * Akashdeep Sharma <[email protected]> + * + */ +#include <drm/drm_edid.h> +#include <drm/drm_atomic_helper.h> +#include "intel_drv.h" + +#define LSPCON_I2C_ADDRESS 0x80 +#define LSPCON_MODE_CHANGE_OFFSET 0x40 +#define LSPCON_MODE_CHECK_OFFSET 0x41 +#define LSPCON_ADAPTER_SIGN_OFFSET 0x00 +#define LSPCON_IDENTIFIER_OFFSET 0x10 +#define LSPCON_IDENTIFIER_LENGTH 0x10 +#define LSPCON_ADAPTER 0xA8 +#define DP_TYPE2_ADAPTER 0xA0 +#define ADAPTER_TYPE_MASK 0xF0 +#define LSPCON_MODE_MASK 0x1 + +struct intel_digital_port *lspcon_to_dig_port(struct intel_lspcon *lspcon) +{ + return container_of(lspcon, struct intel_digital_port, lspcon); +} + +struct intel_hdmi *lspcon_to_hdmi(struct intel_lspcon *lspcon) +{ + return &lspcon_to_dig_port(lspcon)->hdmi; +} + +struct intel_lspcon *enc_to_lspcon(struct drm_encoder *encoder) +{ + struct intel_digital_port *intel_dig_port = + container_of(encoder, struct intel_digital_port, base.base); + return &intel_dig_port->lspcon; +} + +int lspcon_ioa_read(struct i2c_adapter *adapter, u8 *buffer, + u8 address, u8 offset, u8 no_of_bytes) +{ + int err = 0; + + struct i2c_msg msgs[] = { + { + .addr = address >> 1, + .flags = 0, + .len = 1, + .buf = &offset, + }, { + .addr = address >> 1, + .flags = I2C_M_RD, + .len = no_of_bytes, + .buf = buffer, + } + }; + + /* I2C over AUX here */ + err = adapter->algo->master_xfer(adapter, msgs, 2); + if (err < 0) + DRM_ERROR("LSPCON: Failed I2C over Aux read(addr=0x%x)\n", + (unsigned int)offset); + + return err; +} + +int lspcon_ioa_write(struct i2c_adapter *adapter, u8 *buffer, + u8 address, u8 offset, u8 no_of_bytes) +{ + int err = 0; + + struct i2c_msg msgs[] = { + { + .addr = address >> 1, + .flags = 0, + .len = 1, + .buf = &offset, + }, { + .addr = address >> 1, + .flags = 0, + .len = no_of_bytes, + .buf = buffer, + } + }; + + /* I2C over AUX here */ + err = adapter->algo->master_xfer(adapter, msgs, 2); + if (err < 0) + DRM_ERROR("LSPCON: Failed I2C over Aux write(addr=0x%x)\n", + (unsigned int)offset); + + return err; +} -- 1.9.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
