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746c1aa4d1
This is enough to retrieve EDID and DPCP. Signed-off-by: Dave Airlie <airlied@redhat.com>
301 lines
7.0 KiB
C
301 lines
7.0 KiB
C
/*
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* Copyright 2007-8 Advanced Micro Devices, Inc.
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* Copyright 2008 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alex Deucher
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*/
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#include "drmP.h"
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#include "radeon_drm.h"
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#include "radeon.h"
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/**
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* radeon_ddc_probe
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*
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*/
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bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
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{
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u8 out_buf[] = { 0x0, 0x0};
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u8 buf[2];
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int ret;
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struct i2c_msg msgs[] = {
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{
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.addr = 0x50,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = 0x50,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = buf,
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}
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};
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ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2);
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if (ret == 2)
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return true;
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return false;
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}
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void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
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{
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t temp;
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/* RV410 appears to have a bug where the hw i2c in reset
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* holds the i2c port in a bad state - switch hw i2c away before
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* doing DDC - do this for all r200s/r300s/r400s for safety sake
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*/
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if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
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if (rec->a_clk_reg == RADEON_GPIO_MONID) {
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WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
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R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
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} else {
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WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
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R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
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}
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}
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/* clear the output pin values */
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temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask;
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WREG32(rec->a_clk_reg, temp);
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temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
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WREG32(rec->a_data_reg, temp);
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/* mask the gpio pins for software use */
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temp = RREG32(rec->mask_clk_reg);
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if (lock_state)
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temp |= rec->mask_clk_mask;
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else
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temp &= ~rec->mask_clk_mask;
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WREG32(rec->mask_clk_reg, temp);
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temp = RREG32(rec->mask_clk_reg);
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temp = RREG32(rec->mask_data_reg);
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if (lock_state)
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temp |= rec->mask_data_mask;
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else
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temp &= ~rec->mask_data_mask;
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WREG32(rec->mask_data_reg, temp);
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temp = RREG32(rec->mask_data_reg);
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}
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static int get_clock(void *i2c_priv)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* read the value off the pin */
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val = RREG32(rec->y_clk_reg);
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val &= rec->y_clk_mask;
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return (val != 0);
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}
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static int get_data(void *i2c_priv)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* read the value off the pin */
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val = RREG32(rec->y_data_reg);
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val &= rec->y_data_mask;
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return (val != 0);
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}
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static void set_clock(void *i2c_priv, int clock)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* set pin direction */
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val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
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val |= clock ? 0 : rec->en_clk_mask;
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WREG32(rec->en_clk_reg, val);
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}
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static void set_data(void *i2c_priv, int data)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* set pin direction */
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val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
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val |= data ? 0 : rec->en_data_mask;
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WREG32(rec->en_data_reg, val);
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}
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struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
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struct radeon_i2c_bus_rec *rec,
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const char *name)
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{
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struct radeon_i2c_chan *i2c;
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int ret;
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i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
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if (i2c == NULL)
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return NULL;
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i2c->adapter.owner = THIS_MODULE;
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i2c->dev = dev;
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i2c_set_adapdata(&i2c->adapter, i2c);
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i2c->adapter.algo_data = &i2c->algo.bit;
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i2c->algo.bit.setsda = set_data;
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i2c->algo.bit.setscl = set_clock;
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i2c->algo.bit.getsda = get_data;
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i2c->algo.bit.getscl = get_clock;
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i2c->algo.bit.udelay = 20;
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/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
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* make this, 2 jiffies is a lot more reliable */
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i2c->algo.bit.timeout = 2;
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i2c->algo.bit.data = i2c;
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i2c->rec = *rec;
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ret = i2c_bit_add_bus(&i2c->adapter);
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if (ret) {
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DRM_INFO("Failed to register i2c %s\n", name);
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goto out_free;
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}
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return i2c;
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out_free:
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kfree(i2c);
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return NULL;
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}
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struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev,
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const char *name, bool dp, u8 i2c_id)
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{
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struct radeon_i2c_chan *i2c;
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int ret;
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i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
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if (i2c == NULL)
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return NULL;
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i2c->i2c_id = i2c_id;
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i2c->adapter.owner = THIS_MODULE;
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i2c->dev = dev;
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i2c_set_adapdata(&i2c->adapter, i2c);
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i2c->adapter.algo_data = &i2c->algo.dp;
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i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch;
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i2c->algo.dp.address = 0;
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ret = i2c_dp_aux_add_bus(&i2c->adapter);
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if (ret) {
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DRM_INFO("Failed to register i2c %s\n", name);
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goto out_free;
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}
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return i2c;
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out_free:
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kfree(i2c);
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return NULL;
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}
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void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
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{
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if (!i2c)
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return;
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i2c_del_adapter(&i2c->adapter);
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kfree(i2c);
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}
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struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
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{
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return NULL;
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}
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void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
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u8 slave_addr,
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u8 addr,
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u8 *val)
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{
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u8 out_buf[2];
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u8 in_buf[2];
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struct i2c_msg msgs[] = {
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{
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.addr = slave_addr,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = slave_addr,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = in_buf,
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}
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};
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out_buf[0] = addr;
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out_buf[1] = 0;
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if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) {
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*val = in_buf[0];
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DRM_DEBUG("val = 0x%02x\n", *val);
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} else {
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DRM_ERROR("i2c 0x%02x 0x%02x read failed\n",
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addr, *val);
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}
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}
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void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus,
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u8 slave_addr,
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u8 addr,
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u8 val)
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{
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uint8_t out_buf[2];
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struct i2c_msg msg = {
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.addr = slave_addr,
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.flags = 0,
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.len = 2,
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.buf = out_buf,
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};
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out_buf[0] = addr;
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out_buf[1] = val;
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if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1)
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DRM_ERROR("i2c 0x%02x 0x%02x write failed\n",
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addr, val);
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}
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