| /* |
| * Copyright 2013 Google Inc. |
| * Copyright © 2008 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: |
| * Keith Packard <keithp@keithp.com> |
| * |
| */ |
| |
| /* This code was created by the coccinnelle filters in the i915tool, |
| * with some final hand filtering. |
| */ |
| |
| #include <console/console.h> |
| #include <stdint.h> |
| #include <delay.h> |
| #include <drivers/intel/gma/i915.h> |
| #include <string.h> |
| |
| /** |
| * is_edp - is the given port attached to an eDP panel (either CPU or PCH) |
| * @intel_dp: DP struct |
| * |
| * If a CPU or PCH DP output is attached to an eDP panel, this function |
| * will return 1, and 0 otherwise. |
| */ |
| static int is_edp(struct intel_dp *intel_dp) |
| { |
| return intel_dp->type == INTEL_OUTPUT_EDP; |
| } |
| |
| /** |
| * is_pch_edp - is the port on the PCH and attached to an eDP panel? |
| * @intel_dp: DP struct |
| * |
| * Returns 1 if the given DP struct corresponds to a PCH DP port attached |
| * to an eDP panel, 0 otherwise. Helpful for determining whether we |
| * may need FDI resources for a given DP output or not. |
| */ |
| static int is_pch_edp(struct intel_dp *intel_dp) |
| { |
| return intel_dp->is_pch_edp; |
| } |
| |
| /** |
| * is_cpu_edp - is the port on the CPU and attached to an eDP panel? |
| * @intel_dp: DP struct |
| * |
| * Returns 1 if the given DP struct corresponds to a CPU eDP port. |
| */ |
| static int is_cpu_edp(struct intel_dp *intel_dp) |
| { |
| return is_edp(intel_dp) && !is_pch_edp(intel_dp); |
| } |
| |
| static uint32_t |
| pack_aux(uint8_t *src, int src_bytes) |
| { |
| int i; |
| uint32_t v = 0; |
| |
| if (src_bytes > 4) |
| src_bytes = 4; |
| for (i = 0; i < src_bytes; i++) |
| v |= ((uint32_t) src[i]) << ((3-i) * 8); |
| return v; |
| } |
| |
| void |
| unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) |
| { |
| int i; |
| if (dst_bytes > 4) |
| dst_bytes = 4; |
| for (i = 0; i < dst_bytes; i++) |
| dst[i] = src >> ((3-i) * 8); |
| } |
| |
| static int ironlake_edp_have_panel_power(struct intel_dp *intel_dp) |
| { |
| |
| return (io_i915_read32(PCH_PP_STATUS) & PP_ON) != 0; |
| } |
| |
| static int ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) |
| { |
| return (io_i915_read32(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0; |
| } |
| |
| int |
| intel_dp_aux_ch(struct intel_dp *intel_dp, |
| uint8_t *send, int send_bytes, |
| uint8_t *recv, int recv_size) |
| { |
| uint32_t output_reg = intel_dp->output_reg; |
| uint32_t ch_ctl = output_reg + 0x10; |
| uint32_t ch_data = ch_ctl + 4; |
| int i; |
| int recv_bytes; |
| uint32_t status; |
| int try; |
| |
| /* Try to wait for any previous AUX channel activity */ |
| for (try = 0; try < 3; try++) { |
| status = io_i915_read32(ch_ctl); |
| if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) |
| break; |
| mdelay(1); |
| } |
| |
| if (try == 3) { |
| if (1) { |
| status = io_i915_read32(ch_ctl); |
| printk(BIOS_ERR, |
| "dp_aux_ch not started status 0x%08x\n", |
| status); |
| } |
| return -1; |
| } |
| |
| /* Must try at least 3 times according to DP spec */ |
| for (try = 0; try < 5; try++) { |
| /* Load the send data into the aux channel data registers */ |
| for (i = 0; i < send_bytes; i += 4){ |
| u32 val, addr; |
| val = pack_aux(send + i, send_bytes - i); |
| addr = ch_data + i; |
| io_i915_write32(val, addr); |
| } |
| |
| /* Send the command and wait for it to complete */ |
| io_i915_write32(DP_AUX_CH_CTL_SEND_BUSY | |
| DP_AUX_CH_CTL_TIME_OUT_400us | |
| (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | |
| (intel_dp->precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | |
| (intel_dp->aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | |
| DP_AUX_CH_CTL_DONE | |
| DP_AUX_CH_CTL_TIME_OUT_ERROR | |
| DP_AUX_CH_CTL_RECEIVE_ERROR, ch_ctl); |
| for (;;) { |
| status = io_i915_read32(ch_ctl); |
| if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) |
| break; |
| udelay(100); |
| } |
| |
| /* Clear done status and any errors */ |
| io_i915_write32(status | |
| DP_AUX_CH_CTL_DONE | |
| DP_AUX_CH_CTL_TIME_OUT_ERROR | |
| DP_AUX_CH_CTL_RECEIVE_ERROR, ch_ctl); |
| |
| if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | |
| DP_AUX_CH_CTL_RECEIVE_ERROR)) |
| continue; |
| if (status & DP_AUX_CH_CTL_DONE) |
| break; |
| } |
| |
| if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
| printk(BIOS_ERR, "dp_aux_ch not done status 0x%08x\n", status); |
| return -1; |
| } |
| |
| /* Check for timeout or receive error. |
| * Timeouts occur when the sink is not connected |
| */ |
| if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
| printk(BIOS_ERR, |
| "dp_aux_ch receive error status 0x%08x\n", status); |
| return -1; |
| } |
| |
| /* Timeouts occur when the device isn't connected, so they're |
| * "normal" -- don't fill the kernel log with these */ |
| if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
| printk(BIOS_ERR, "dp_aux_ch timeout status 0x%08x\n", status); |
| return -1; |
| } |
| |
| /* Unload any bytes sent back from the other side */ |
| recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> |
| DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); |
| if (recv_bytes > recv_size) |
| recv_bytes = recv_size; |
| |
| for (i = 0; i < recv_bytes; i += 4) |
| unpack_aux(io_i915_read32(ch_data + i), |
| recv + i, recv_bytes - i); |
| |
| return recv_bytes; |
| } |
| |
| /* Write data to the aux channel in native mode */ |
| static int |
| intel_dp_aux_native_write(struct intel_dp *intel_dp, |
| uint16_t address, uint8_t *send, int send_bytes) |
| { |
| int ret; |
| uint8_t msg[20]; |
| int msg_bytes; |
| uint8_t ack; |
| |
| if (send_bytes > 16) |
| return -1; |
| msg[0] = AUX_NATIVE_WRITE << 4; |
| msg[1] = address >> 8; |
| msg[2] = address & 0xff; |
| msg[3] = send_bytes - 1; |
| memcpy(&msg[4], send, send_bytes); |
| msg_bytes = send_bytes + 4; |
| for (;;) { |
| ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
| if (ret < 0) |
| return ret; |
| if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) |
| break; |
| else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) |
| udelay(100); |
| else |
| return -1; |
| } |
| return send_bytes; |
| } |
| |
| /* Write a single byte to the aux channel in native mode */ |
| static int |
| intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
| uint16_t address, uint8_t byte) |
| { |
| return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
| } |
| |
| int intel_dp_set_bw(struct intel_dp *intel_dp) |
| { |
| printk(BIOS_SPEW, "DP_LINK_BW_SET"); |
| return intel_dp_aux_native_write_1(intel_dp, |
| DP_LINK_BW_SET, |
| intel_dp->link_bw); |
| } |
| |
| int intel_dp_set_lane_count(struct intel_dp *intel_dp) |
| { |
| printk(BIOS_SPEW, "DP_LANE_COUNT_SET"); |
| return intel_dp_aux_native_write_1(intel_dp, |
| DP_LANE_COUNT_SET, |
| intel_dp->lane_count); |
| } |
| |
| int intel_dp_set_training_pattern(struct intel_dp *intel_dp, |
| u8 pat) |
| { |
| printk(BIOS_SPEW, "DP_TRAINING_PATTERN_SET"); |
| return intel_dp_aux_native_write_1(intel_dp, |
| DP_TRAINING_PATTERN_SET, |
| pat); |
| } |
| |
| int intel_dp_set_training_lane0(struct intel_dp *intel_dp, |
| u8 val) |
| { |
| printk(BIOS_SPEW, "DP_TRAINING_LANE0_SET"); |
| return intel_dp_aux_native_write_1(intel_dp, |
| DP_TRAINING_LANE0_SET, |
| val); |
| } |
| |
| /* read bytes from a native aux channel */ |
| static int |
| intel_dp_aux_native_read(struct intel_dp *intel_dp, |
| uint16_t address, uint8_t *recv, int recv_bytes) |
| { |
| uint8_t msg[4]; |
| int msg_bytes; |
| uint8_t reply[20]; |
| int reply_bytes; |
| uint8_t ack; |
| int ret; |
| |
| msg[0] = AUX_NATIVE_READ << 4; |
| msg[1] = address >> 8; |
| msg[2] = address & 0xff; |
| msg[3] = recv_bytes - 1; |
| |
| msg_bytes = 4; |
| reply_bytes = recv_bytes + 1; |
| |
| for (;;) { |
| ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
| reply, reply_bytes); |
| if (ret == 0) |
| return -1; |
| if (ret < 0) |
| return ret; |
| ack = reply[0]; |
| if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { |
| memcpy(recv, reply + 1, ret - 1); |
| return ret - 1; |
| } |
| else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) |
| udelay(100); |
| else |
| return -1; |
| } |
| } |
| |
| int |
| intel_dp_i2c_aux_ch(struct intel_dp *intel_dp, |
| int mode, uint8_t write_byte, uint8_t *read_byte) |
| { |
| uint8_t msg[5]; |
| uint8_t reply[2]; |
| unsigned retry; |
| int msg_bytes; |
| int reply_bytes; |
| int ret; |
| |
| /* Set up the command byte */ |
| if (mode & MODE_I2C_READ) |
| msg[0] = AUX_I2C_READ << 4; |
| else |
| msg[0] = AUX_I2C_WRITE << 4; |
| |
| if (!(mode & MODE_I2C_STOP)) |
| msg[0] |= AUX_I2C_MOT << 4; |
| |
| msg[1] = intel_dp->address >> 8; |
| msg[2] = intel_dp->address; |
| |
| switch (mode) { |
| case MODE_I2C_WRITE: |
| msg[3] = 0; |
| msg[4] = write_byte; |
| msg_bytes = 5; |
| reply_bytes = 1; |
| break; |
| case MODE_I2C_READ: |
| msg[3] = 0; |
| msg_bytes = 4; |
| reply_bytes = 2; |
| break; |
| default: |
| msg_bytes = 3; |
| reply_bytes = 1; |
| break; |
| } |
| |
| for (retry = 0; retry < 5; retry++) { |
| ret = intel_dp_aux_ch(intel_dp, |
| msg, msg_bytes, |
| reply, reply_bytes); |
| if (ret < 0) { |
| printk(BIOS_ERR, "aux_ch failed %d\n", ret); |
| return ret; |
| } |
| |
| switch (reply[0] & AUX_NATIVE_REPLY_MASK) { |
| case AUX_NATIVE_REPLY_ACK: |
| /* I2C-over-AUX Reply field is only valid |
| * when paired with AUX ACK. |
| */ |
| break; |
| case AUX_NATIVE_REPLY_NACK: |
| printk(BIOS_ERR, "aux_ch native nack\n"); |
| return -1; |
| case AUX_NATIVE_REPLY_DEFER: |
| udelay(100); |
| continue; |
| default: |
| printk(BIOS_ERR, "aux_ch invalid native reply 0x%02x\n", |
| reply[0]); |
| return -1; |
| } |
| |
| switch (reply[0] & AUX_I2C_REPLY_MASK) { |
| case AUX_I2C_REPLY_ACK: |
| if (mode == MODE_I2C_READ) { |
| *read_byte = reply[1]; |
| } |
| return reply_bytes - 1; |
| case AUX_I2C_REPLY_NACK: |
| printk(BIOS_ERR, "aux_i2c nack\n"); |
| return -1; |
| case AUX_I2C_REPLY_DEFER: |
| printk(BIOS_ERR, "aux_i2c defer\n"); |
| udelay(100); |
| break; |
| default: |
| printk(BIOS_ERR, |
| "aux_i2c invalid reply 0x%02x\n", reply[0]); |
| return -1; |
| } |
| } |
| |
| printk(BIOS_ERR, "too many retries, giving up\n"); |
| return -1; |
| } |
| |
| int intel_dp_i2c_write(struct intel_dp *intel_dp, |
| u8 val) |
| { |
| return intel_dp_i2c_aux_ch(intel_dp, |
| MODE_I2C_WRITE, |
| val, |
| NULL); |
| } |
| |
| int intel_dp_i2c_read(struct intel_dp *intel_dp, |
| u8 *val) |
| { |
| return intel_dp_i2c_aux_ch(intel_dp, |
| MODE_I2C_READ, |
| 0, |
| val); |
| } |
| |
| int |
| intel_dp_i2c_init(struct intel_dp *intel_dp) |
| { |
| int ret = 0; |
| |
| /* not clear what we need to do here, if anything. |
| * this function was more about setting up the kernel. |
| * it's a handy placeholder, so we leave it in for now. |
| */ |
| return ret; |
| } |
| |
| static void |
| intel_reduce_m_n_ratio(uint32_t *num, uint32_t *den) |
| { |
| while (*num > DATA_LINK_M_N_MASK || *den > DATA_LINK_M_N_MASK) { |
| *num >>= 1; |
| *den >>= 1; |
| } |
| } |
| |
| unsigned int roundup_power_of_two(unsigned int n); |
| |
| unsigned int roundup_power_of_two(unsigned int n) |
| { |
| n--; |
| n |= n >> 1; |
| n |= n >> 2; |
| n |= n >> 4; |
| n |= n >> 8; |
| n |= n >> 16; |
| n++; |
| return n; |
| } |
| |
| static void compute_m_n(unsigned int m, unsigned int n, |
| unsigned int *ret_m, unsigned int *ret_n) |
| { |
| *ret_n = MIN(roundup_power_of_two(n), DATA_LINK_N_MAX); |
| *ret_m = ( (unsigned long long)m * *ret_n) / n; |
| intel_reduce_m_n_ratio(ret_m, ret_n); |
| } |
| |
| void intel_dp_compute_m_n(unsigned int bits_per_pixel, |
| unsigned int nlanes, |
| unsigned int pixel_clock, |
| unsigned int link_clock, |
| struct intel_dp_m_n *m_n) |
| { |
| m_n->tu = 64; |
| |
| compute_m_n(bits_per_pixel * pixel_clock, |
| link_clock * nlanes * 8, |
| &m_n->gmch_m, &m_n->gmch_n); |
| |
| compute_m_n(pixel_clock, link_clock, |
| &m_n->link_m, &m_n->link_n); |
| } |
| |
| /* not sure. */ |
| void intel_dp_set_m_n(struct intel_dp *intel_dp); |
| |
| void |
| intel_dp_set_m_n(struct intel_dp *intel_dp) |
| { |
| int lane_count; |
| struct intel_dp_m_n m_n; |
| int pipe = intel_dp->pipe; |
| |
| lane_count = intel_dp->lane_count; |
| |
| /* |
| * Compute the GMCH and Link ratios. The '3' here is |
| * the number of bytes_per_pixel post-LUT, which we always |
| * set up for 8-bits of R/G/B, or 3 bytes total. |
| */ |
| intel_dp_compute_m_n(intel_dp->bpp, lane_count, |
| intel_dp->clock, intel_dp->clock, &m_n); |
| |
| { |
| io_i915_write32(( |
| (m_n.tu - 1) << |
| PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | |
| m_n.gmch_m, TRANSDATA_M1(pipe)); |
| io_i915_write32(m_n.gmch_n, TRANSDATA_N1(pipe)); |
| io_i915_write32(m_n.link_m, TRANSDPLINK_M1(pipe)); |
| io_i915_write32(m_n.link_n, TRANSDPLINK_N1(pipe)); |
| } |
| } |
| |
| static void ironlake_edp_pll_off(void); |
| |
| void |
| intel_dp_mode_set(struct intel_dp *intel_dp) |
| { |
| /* Turn on the eDP PLL if needed */ |
| if (is_edp(intel_dp)) { |
| if (!is_pch_edp(intel_dp)) |
| ironlake_edp_pll_on(); |
| else |
| ironlake_edp_pll_off(); |
| } |
| |
| /* |
| * There are four kinds of DP registers: |
| * |
| * IBX PCH |
| * SNB CPU |
| * IVB CPU |
| * CPT PCH |
| * |
| * IBX PCH and CPU are the same for almost everything, |
| * except that the CPU DP PLL is configured in this |
| * register |
| * |
| * CPT PCH is quite different, having many bits moved |
| * to the TRANS_DP_CTL register instead. That |
| * configuration happens (oddly) in ironlake_pch_enable |
| */ |
| |
| /* Preserve the BIOS-computed detected bit. This is |
| * supposed to be read-only. |
| */ |
| intel_dp->DP = io_i915_read32(intel_dp->output_reg) & DP_DETECTED; |
| printk(BIOS_SPEW, "%s: initial value is %08lx\n", __func__, |
| (unsigned long)intel_dp->DP); |
| /* | 0 essentially */ |
| intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
| |
| /* Handle DP bits in common between all three register formats */ |
| |
| switch (intel_dp->lane_count) { |
| case 1: |
| intel_dp->DP |= DP_PORT_WIDTH_1; |
| break; |
| case 2: |
| intel_dp->DP |= DP_PORT_WIDTH_2; |
| break; |
| case 4: |
| intel_dp->DP |= DP_PORT_WIDTH_4; |
| break; |
| } |
| memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); |
| intel_dp->link_configuration[0] = intel_dp->link_bw; |
| intel_dp->link_configuration[1] = intel_dp->lane_count; |
| intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; |
| /* |
| * Check for DPCD version > 1.1 and enhanced framing support |
| */ |
| if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && |
| (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { |
| intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; |
| } |
| |
| /* Split out the IBX/CPU vs CPT settings */ |
| |
| if (is_cpu_edp(intel_dp) && (intel_dp->gen == 7)) { |
| /* what are these? We're not sure. |
| if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |
| intel_dp->DP |= DP_SYNC_HS_HIGH; |
| |
| if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) |
| */ |
| intel_dp->DP |= DP_SYNC_VS_HIGH; |
| /* */ |
| intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; |
| |
| if (intel_dp->link_configuration[1] & |
| DP_LANE_COUNT_ENHANCED_FRAME_EN) |
| intel_dp->DP |= DP_ENHANCED_FRAMING; |
| |
| intel_dp->DP |= intel_dp->pipe << 29; |
| |
| /* don't miss out required setting for eDP */ |
| intel_dp->DP |= DP_PLL_ENABLE; |
| if (intel_dp->clock < 200000) |
| intel_dp->DP |= DP_PLL_FREQ_160MHZ; |
| else |
| intel_dp->DP |= DP_PLL_FREQ_270MHZ; |
| } else if (!intel_dp->has_pch_cpt || is_cpu_edp(intel_dp)) { |
| intel_dp->DP |= intel_dp->color_range; |
| intel_dp->DP |= DP_LINK_TRAIN_OFF; |
| |
| if (intel_dp->link_configuration[1] & |
| DP_LANE_COUNT_ENHANCED_FRAME_EN) |
| intel_dp->DP |= DP_ENHANCED_FRAMING; |
| |
| if (intel_dp->pipe == 1) |
| intel_dp->DP |= DP_PIPEB_SELECT; |
| |
| if (is_cpu_edp(intel_dp)) { |
| /* don't miss out required setting for eDP */ |
| intel_dp->DP |= DP_PLL_ENABLE; |
| if (intel_dp->clock < 200000) |
| intel_dp->DP |= DP_PLL_FREQ_160MHZ; |
| else |
| intel_dp->DP |= DP_PLL_FREQ_270MHZ; |
| } |
| } else { |
| intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; |
| } |
| } |
| |
| #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
| #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) |
| |
| #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
| #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) |
| |
| #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) |
| #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) |
| |
| static void ironlake_wait_panel_status(struct intel_dp *intel_dp, |
| u32 mask, |
| u32 value) |
| { |
| int i; |
| u32 status; |
| printk(BIOS_ERR, "[000000.0] [drm:%s], ", __func__); |
| printk(BIOS_ERR, "mask %08lx value %08lx status %08lx control %08lx\n", |
| (unsigned long) mask, (unsigned long) value, |
| (unsigned long)io_i915_read32(PCH_PP_STATUS), |
| (unsigned long)io_i915_read32(PCH_PP_CONTROL)); |
| |
| for(i = 0, status = io_i915_read32(PCH_PP_STATUS); ((status & mask) != value) && (i < 5000); |
| status = io_i915_read32(PCH_PP_STATUS)){ |
| udelay(10); |
| } |
| if (i > 5000){ |
| printk(BIOS_ERR, |
| "Panel status timeout: status %08lx control %08lx\n", |
| (unsigned long)io_i915_read32(PCH_PP_STATUS), |
| (unsigned long)io_i915_read32(PCH_PP_CONTROL)); |
| } |
| } |
| |
| static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
| { |
| printk(BIOS_ERR, "Wait for panel power on\n"); |
| ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); |
| } |
| |
| static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
| { |
| printk(BIOS_ERR, "Wait for panel power off time\n"); |
| ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); |
| } |
| |
| static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) |
| { |
| printk(BIOS_ERR, "Wait for panel power cycle\n"); |
| ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); |
| } |
| |
| void intel_dp_wait_reg(unsigned long addr, |
| unsigned long val) |
| { |
| unsigned long newval; |
| int tries = 0; |
| |
| while ((newval = io_i915_read32(addr)) != val) { |
| udelay(1); |
| if (tries++ > 1000) { |
| printk(BIOS_ERR, "%s: Waiting on %08lx to be %08lx, got %08lx\n", |
| __func__, addr, val, newval); |
| break; |
| } |
| } |
| } |
| |
| void intel_dp_wait_panel_power_control(unsigned long val) |
| { |
| intel_dp_wait_reg(PCH_PP_CONTROL, val); |
| } |
| |
| /* Read the current pp_control value, unlocking the register if it |
| * is locked |
| */ |
| |
| static u32 ironlake_get_pp_control(void) |
| { |
| u32 control = io_i915_read32(PCH_PP_CONTROL); |
| |
| control &= ~PANEL_UNLOCK_MASK; |
| control |= PANEL_UNLOCK_REGS; |
| return control; |
| } |
| |
| void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
| { |
| u32 pp; |
| |
| if (!is_edp(intel_dp)) |
| return; |
| printk(BIOS_ERR, "Turn eDP VDD on\n"); |
| |
| if (intel_dp->want_panel_vdd) { |
| printk(BIOS_ERR, "eDP VDD already requested on\n"); |
| } |
| |
| intel_dp->want_panel_vdd = 1; |
| |
| if (ironlake_edp_have_panel_vdd(intel_dp)) { |
| printk(BIOS_ERR, "eDP VDD already on\n"); |
| return; |
| } |
| |
| if (!ironlake_edp_have_panel_power(intel_dp)) |
| ironlake_wait_panel_power_cycle(intel_dp); |
| |
| pp = ironlake_get_pp_control(); |
| pp |= EDP_FORCE_VDD; |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| // remember this if we need it later. Not sure yet. |
| ////POSTING_READ(PCH_PP_CONTROL); |
| printk(BIOS_ERR, "PCH_PP_STATUS: 0x%08lx PCH_PP_CONTROL: 0x%08lx\n", |
| io_i915_read32(PCH_PP_STATUS), io_i915_read32(PCH_PP_CONTROL)); |
| |
| /* |
| * If the panel wasn't on, delay before accessing aux channel |
| */ |
| if (!ironlake_edp_have_panel_power(intel_dp)) { |
| printk(BIOS_ERR, "eDP was not running\n"); |
| mdelay(intel_dp->panel_power_up_delay); |
| } |
| } |
| |
| static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
| { |
| u32 pp; |
| |
| if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
| pp = ironlake_get_pp_control(); |
| pp &= ~EDP_FORCE_VDD; |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| |
| /* Make sure sequencer is idle before allowing subsequent activity */ |
| printk(BIOS_ERR, "PCH_PP_STATUS: 0x%08lx PCH_PP_CONTROL: 0x%08lx\n", |
| io_i915_read32(PCH_PP_STATUS), io_i915_read32(PCH_PP_CONTROL)); |
| |
| mdelay(intel_dp->panel_power_down_delay); |
| } |
| } |
| |
| void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, int sync) |
| { |
| if (!is_edp(intel_dp)) |
| return; |
| |
| printk(BIOS_ERR, "Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
| if (!intel_dp->want_panel_vdd) { |
| printk(BIOS_ERR, "eDP VDD not forced on"); |
| } |
| |
| intel_dp->want_panel_vdd = 0; |
| |
| if (sync) |
| ironlake_panel_vdd_off_sync(intel_dp); |
| } |
| |
| void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
| { |
| u32 pp; |
| |
| if (!is_edp(intel_dp)) |
| return; |
| |
| printk(BIOS_ERR, "Turn eDP power on\n"); |
| |
| if (ironlake_edp_have_panel_power(intel_dp)) { |
| printk(BIOS_ERR, "eDP power already on\n"); |
| return; |
| } |
| |
| ironlake_wait_panel_power_cycle(intel_dp); |
| |
| pp = ironlake_get_pp_control(); |
| if (intel_dp->gen == 5) { |
| /* ILK workaround: disable reset around power sequence */ |
| pp &= ~PANEL_POWER_RESET; |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| } |
| |
| pp |= POWER_TARGET_ON; |
| if (!(intel_dp->gen == 5)) |
| pp |= PANEL_POWER_RESET; |
| |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| |
| ironlake_wait_panel_on(intel_dp); |
| |
| if (intel_dp->gen == 5) { |
| pp |= PANEL_POWER_RESET; /* restore panel reset bit */ |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| } |
| } |
| |
| static void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
| { |
| u32 pp; |
| |
| if (!is_edp(intel_dp)) |
| return; |
| |
| printk(BIOS_ERR, "Turn eDP power off\n"); |
| |
| if (intel_dp->want_panel_vdd) { |
| printk(BIOS_ERR, "Cannot turn power off while VDD is on\n"); |
| } |
| |
| pp = ironlake_get_pp_control(); |
| pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | |
| PANEL_POWER_RESET | EDP_BLC_ENABLE); |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| |
| ironlake_wait_panel_off(intel_dp); |
| } |
| |
| void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
| { |
| u32 pp; |
| |
| if (!is_edp(intel_dp)) |
| return; |
| |
| /* |
| * If we enable the backlight right away following a panel power |
| * on, we may see slight flicker as the panel syncs with the eDP |
| * link. So delay a bit to make sure the image is solid before |
| * allowing it to appear. |
| */ |
| mdelay(intel_dp->backlight_on_delay); |
| pp = ironlake_get_pp_control(); |
| pp |= EDP_BLC_ENABLE; |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| } |
| |
| static void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
| { |
| u32 pp; |
| |
| if (!is_edp(intel_dp)) |
| return; |
| |
| pp = ironlake_get_pp_control(); |
| pp &= ~EDP_BLC_ENABLE; |
| io_i915_write32(pp, PCH_PP_CONTROL); |
| ////POSTING_READ(PCH_PP_CONTROL); |
| mdelay(intel_dp->backlight_off_delay); |
| } |
| |
| void ironlake_edp_pll_on(void) |
| { |
| u32 dpa_ctl; |
| |
| dpa_ctl = io_i915_read32(DP_A); |
| dpa_ctl |= DP_PLL_ENABLE; |
| io_i915_write32(dpa_ctl, DP_A); |
| ////POSTING_READ(DP_A); |
| udelay(200); |
| } |
| |
| static void ironlake_edp_pll_off(void) |
| { |
| u32 dpa_ctl; |
| |
| dpa_ctl = io_i915_read32(DP_A); |
| dpa_ctl &= ~DP_PLL_ENABLE; |
| io_i915_write32(dpa_ctl, DP_A); |
| ////POSTING_READ(DP_A); |
| udelay(200); |
| } |
| |
| /* If the sink supports it, try to set the power state appropriately */ |
| void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) |
| { |
| int ret, i; |
| |
| /* Should have a valid DPCD by this point */ |
| if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) |
| return; |
| |
| /* the convention, for whatever reason, is that mode > 0 means 'off' */ |
| if (mode) { |
| ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, |
| DP_SET_POWER_D3); |
| if (ret != 1) { |
| printk(BIOS_ERR, "failed to write sink power state\n"); |
| } |
| } else { |
| /* |
| * When turning on, we need to retry for 1ms to give the sink |
| * time to wake up. |
| */ |
| for (i = 0; i < 3; i++) { |
| ret = intel_dp_aux_native_write_1(intel_dp, |
| DP_SET_POWER, |
| DP_SET_POWER_D0); |
| if (ret == 1) |
| break; |
| mdelay(1); |
| } |
| } |
| } |
| // not sure if needed yet or not. |
| void intel_dp_prepare(struct intel_dp *intel_dp); |
| void intel_dp_prepare(struct intel_dp *intel_dp) |
| { |
| |
| ironlake_edp_backlight_off(intel_dp); |
| ironlake_edp_panel_off(intel_dp); |
| |
| /* Wake up the sink first */ |
| ironlake_edp_panel_vdd_on(intel_dp); |
| intel_dp_sink_dpms(intel_dp, 0); |
| intel_dp_link_down(intel_dp); |
| ironlake_edp_panel_vdd_off(intel_dp, 0); |
| |
| /* Make sure the panel is off before trying to |
| * change the mode |
| */ |
| } |
| |
| // might be useful. |
| void intel_dp_commit(struct intel_dp *intel_dp); |
| void intel_dp_commit(struct intel_dp *intel_dp) |
| { |
| |
| ironlake_edp_panel_vdd_on(intel_dp); |
| intel_dp_sink_dpms(intel_dp, 0); |
| intel_dp_start_link_train(intel_dp); |
| ironlake_edp_panel_on(intel_dp); |
| ironlake_edp_panel_vdd_off(intel_dp, 1); |
| intel_dp_complete_link_train(intel_dp); |
| ironlake_edp_backlight_on(intel_dp); |
| |
| intel_dp->dpms_mode = 0; |
| } |
| |
| void |
| intel_dp_dpms(struct intel_dp *intel_dp, int mode) |
| { |
| uint32_t dp_reg = io_i915_read32(intel_dp->output_reg); |
| |
| printk(BIOS_SPEW, "%s: power %s\n", __func__, mode ? "off" : "on"); |
| if (mode){ |
| ironlake_edp_backlight_off(intel_dp); |
| ironlake_edp_panel_off(intel_dp); |
| |
| ironlake_edp_panel_vdd_on(intel_dp); |
| intel_dp_sink_dpms(intel_dp, mode); |
| intel_dp_link_down(intel_dp); |
| ironlake_edp_panel_vdd_off(intel_dp, 0); |
| |
| if (is_cpu_edp(intel_dp)) |
| ironlake_edp_pll_off(); |
| } else { |
| if (is_cpu_edp(intel_dp)) |
| ironlake_edp_pll_on(); |
| |
| ironlake_edp_panel_vdd_on(intel_dp); |
| intel_dp_sink_dpms(intel_dp, mode); |
| if (!(dp_reg & DP_PORT_EN)) { |
| intel_dp_start_link_train(intel_dp); |
| ironlake_edp_panel_on(intel_dp); |
| ironlake_edp_panel_vdd_off(intel_dp, 1); |
| intel_dp_complete_link_train(intel_dp); |
| } else |
| ironlake_edp_panel_vdd_off(intel_dp, 0); |
| ironlake_edp_backlight_on(intel_dp); |
| } |
| intel_dp->dpms_mode = mode; |
| } |
| |
| /* |
| * Native read with retry for link status and receiver capability reads for |
| * cases where the sink may still be asleep. |
| */ |
| static int |
| intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
| uint8_t *recv, int recv_bytes) |
| { |
| int ret, i; |
| |
| /* |
| * Sinks are *supposed* to come up within 1ms from an off state, |
| * but we're also supposed to retry 3 times per the spec. |
| */ |
| for (i = 0; i < 3; i++) { |
| ret = intel_dp_aux_native_read(intel_dp, address, recv, |
| recv_bytes); |
| if (ret == recv_bytes) |
| return ret; |
| mdelay(1); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Fetch AUX CH registers 0x202 - 0x207 which contain |
| * link status information |
| */ |
| int |
| intel_dp_get_link_status(struct intel_dp *intel_dp, |
| uint8_t link_status[DP_LINK_STATUS_SIZE]) |
| { |
| int ret, i; |
| |
| ret = intel_dp_aux_native_read_retry(intel_dp, |
| DP_LANE0_1_STATUS, |
| link_status, |
| DP_LINK_STATUS_SIZE); |
| |
| printk(BIOS_SPEW, "%s:", __func__); |
| for(i = 0; i < /* !!sizeof(link_status) == 4*/ |
| DP_LINK_STATUS_SIZE; i++) |
| printk(BIOS_SPEW, " %02x", link_status[i]); |
| printk(BIOS_SPEW, "\n"); |
| return ret; |
| } |
| |
| static uint8_t |
| intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], |
| int r) |
| { |
| return link_status[r - DP_LANE0_1_STATUS]; |
| } |
| |
| #if 0 |
| static uint8_t |
| intel_get_adjust_request_voltage(uint8_t adjust_request[2], |
| int lane) |
| { |
| int s = ((lane & 1) ? |
| DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : |
| DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); |
| uint8_t l = adjust_request[lane>>1]; |
| |
| return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; |
| } |
| |
| static uint8_t |
| intel_get_adjust_request_pre_emphasis(uint8_t adjust_request[2], |
| int lane) |
| { |
| int s = ((lane & 1) ? |
| DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : |
| DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); |
| uint8_t l = adjust_request[lane>>1]; |
| |
| return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; |
| } |
| #endif |
| const char *voltage_names[] = { |
| "0.4V", "0.6V", "0.8V", "1.2V" |
| }; |
| const char *pre_emph_names[] = { |
| "0dB", "3.5dB", "6dB", "9.5dB" |
| }; |
| const char *link_train_names[] = { |
| "pattern 1", "pattern 2", "idle", "off" |
| }; |
| |
| /* |
| * These are source-specific values; current Intel hardware supports |
| * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB |
| */ |
| |
| static uint8_t |
| intel_dp_voltage_max(struct intel_dp *intel_dp) |
| { |
| |
| if ((intel_dp->gen == 7) && is_cpu_edp(intel_dp)) |
| return DP_TRAIN_VOLTAGE_SWING_800; |
| else if (intel_dp->has_pch_cpt && !is_cpu_edp(intel_dp)) |
| return DP_TRAIN_VOLTAGE_SWING_1200; |
| else |
| return DP_TRAIN_VOLTAGE_SWING_800; |
| } |
| |
| static uint8_t |
| intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) |
| { |
| |
| if (intel_dp->is_haswell){ |
| switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
| case DP_TRAIN_VOLTAGE_SWING_400: |
| return DP_TRAIN_PRE_EMPHASIS_9_5; |
| case DP_TRAIN_VOLTAGE_SWING_600: |
| return DP_TRAIN_PRE_EMPHASIS_6; |
| case DP_TRAIN_VOLTAGE_SWING_800: |
| return DP_TRAIN_PRE_EMPHASIS_3_5; |
| case DP_TRAIN_VOLTAGE_SWING_1200: |
| default: |
| return DP_TRAIN_PRE_EMPHASIS_0; |
| } |
| } else if ((intel_dp->gen == 7) && is_cpu_edp(intel_dp)) { |
| switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
| case DP_TRAIN_VOLTAGE_SWING_400: |
| return DP_TRAIN_PRE_EMPHASIS_6; |
| case DP_TRAIN_VOLTAGE_SWING_600: |
| case DP_TRAIN_VOLTAGE_SWING_800: |
| return DP_TRAIN_PRE_EMPHASIS_3_5; |
| default: |
| return DP_TRAIN_PRE_EMPHASIS_0; |
| } |
| } else { |
| switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
| case DP_TRAIN_VOLTAGE_SWING_400: |
| return DP_TRAIN_PRE_EMPHASIS_6; |
| case DP_TRAIN_VOLTAGE_SWING_600: |
| return DP_TRAIN_PRE_EMPHASIS_6; |
| case DP_TRAIN_VOLTAGE_SWING_800: |
| return DP_TRAIN_PRE_EMPHASIS_3_5; |
| case DP_TRAIN_VOLTAGE_SWING_1200: |
| default: |
| return DP_TRAIN_PRE_EMPHASIS_0; |
| } |
| } |
| } |
| |
| static void |
| intel_get_adjust_train(struct intel_dp *intel_dp, |
| uint8_t link_status[DP_LINK_STATUS_SIZE]) |
| { |
| uint8_t v = 0; |
| uint8_t p = 0; |
| int lane; |
| uint8_t voltage_max; |
| uint8_t preemph_max; |
| |
| for (lane = 0; lane < intel_dp->lane_count; lane++) { |
| uint8_t this_v = drm_dp_get_adjust_request_voltage( |
| link_status, lane); |
| uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis( |
| link_status, lane); |
| |
| if (this_v > v) |
| v = this_v; |
| if (this_p > p) |
| p = this_p; |
| } |
| |
| voltage_max = intel_dp_voltage_max(intel_dp); |
| if (v >= voltage_max) |
| v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; |
| |
| preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
| if (p >= preemph_max) |
| p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; |
| |
| printk(BIOS_SPEW, "%s: set to %s %s%s %s\n", |
| __func__, |
| voltage_names[v&3], pre_emph_names[p&3], |
| v & DP_TRAIN_MAX_SWING_REACHED ? ",max volt swing reached":"", |
| p & DP_TRAIN_MAX_PRE_EMPHASIS_REACHED ? |
| ", max pre emph reached" : ""); |
| for (lane = 0; lane < 4; lane++) |
| intel_dp->train_set[lane] = v | p; |
| } |
| |
| static uint32_t |
| intel_dp_signal_levels(uint8_t train_set) |
| { |
| uint32_t signal_levels = 0; |
| |
| switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
| case DP_TRAIN_VOLTAGE_SWING_400: |
| default: |
| signal_levels |= DP_VOLTAGE_0_4; |
| break; |
| case DP_TRAIN_VOLTAGE_SWING_600: |
| signal_levels |= DP_VOLTAGE_0_6; |
| break; |
| case DP_TRAIN_VOLTAGE_SWING_800: |
| signal_levels |= DP_VOLTAGE_0_8; |
| break; |
| case DP_TRAIN_VOLTAGE_SWING_1200: |
| signal_levels |= DP_VOLTAGE_1_2; |
| break; |
| } |
| switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
| case DP_TRAIN_PRE_EMPHASIS_0: |
| default: |
| signal_levels |= DP_PRE_EMPHASIS_0; |
| break; |
| case DP_TRAIN_PRE_EMPHASIS_3_5: |
| signal_levels |= DP_PRE_EMPHASIS_3_5; |
| break; |
| case DP_TRAIN_PRE_EMPHASIS_6: |
| signal_levels |= DP_PRE_EMPHASIS_6; |
| break; |
| case DP_TRAIN_PRE_EMPHASIS_9_5: |
| signal_levels |= DP_PRE_EMPHASIS_9_5; |
| break; |
| } |
| return signal_levels; |
| } |
| |
| /* Gen6's DP voltage swing and pre-emphasis control */ |
| static uint32_t |
| intel_gen6_edp_signal_levels(uint8_t train_set) |
| { |
| int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
| DP_TRAIN_PRE_EMPHASIS_MASK); |
| switch (signal_levels) { |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
| return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
| return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; |
| case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
| case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
| return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; |
| default: |
| printk(BIOS_ERR, "[000000.0] [drm:%s], ", __func__); |
| printk(BIOS_ERR, "Unsupported voltage swing/pre-emphasis level:" |
| "0x%x\n", signal_levels); |
| return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; |
| } |
| } |
| |
| /* Gen7's DP voltage swing and pre-emphasis control */ |
| static uint32_t |
| intel_gen7_edp_signal_levels(uint8_t train_set) |
| { |
| int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
| DP_TRAIN_PRE_EMPHASIS_MASK); |
| switch (signal_levels) { |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
| return EDP_LINK_TRAIN_400MV_0DB_IVB; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return EDP_LINK_TRAIN_400MV_3_5DB_IVB; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
| return EDP_LINK_TRAIN_400MV_6DB_IVB; |
| |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
| return EDP_LINK_TRAIN_600MV_0DB_IVB; |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return EDP_LINK_TRAIN_600MV_3_5DB_IVB; |
| |
| case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
| return EDP_LINK_TRAIN_800MV_0DB_IVB; |
| case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return EDP_LINK_TRAIN_800MV_3_5DB_IVB; |
| |
| default: |
| printk(BIOS_ERR, "[000000.0] [drm:%s], ", __func__); |
| printk(BIOS_ERR, "Unsupported voltage swing/pre-emphasis level:" |
| "0x%x\n", signal_levels); |
| return EDP_LINK_TRAIN_500MV_0DB_IVB; |
| } |
| } |
| |
| /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ |
| static uint32_t |
| intel_dp_signal_levels_hsw(uint8_t train_set) |
| { |
| int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
| DP_TRAIN_PRE_EMPHASIS_MASK); |
| switch (signal_levels) { |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
| return DDI_BUF_EMP_400MV_0DB_HSW; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return DDI_BUF_EMP_400MV_3_5DB_HSW; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
| return DDI_BUF_EMP_400MV_6DB_HSW; |
| case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: |
| return DDI_BUF_EMP_400MV_9_5DB_HSW; |
| |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
| return DDI_BUF_EMP_600MV_0DB_HSW; |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return DDI_BUF_EMP_600MV_3_5DB_HSW; |
| case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
| return DDI_BUF_EMP_600MV_6DB_HSW; |
| |
| case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
| return DDI_BUF_EMP_800MV_0DB_HSW; |
| case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
| return DDI_BUF_EMP_800MV_3_5DB_HSW; |
| default: |
| printk(BIOS_SPEW, |
| "Unsupported voltage swing/pre-emphasis level:" |
| "0x%x\n", signal_levels); |
| return DDI_BUF_EMP_400MV_0DB_HSW; |
| } |
| } |
| |
| |
| static uint8_t |
| intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], |
| int lane) |
| { |
| int s = (lane & 1) * 4; |
| uint8_t l = link_status[lane>>1]; |
| |
| return (l >> s) & 0xf; |
| } |
| |
| /* Check for clock recovery is done on all channels */ |
| static int |
| intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], |
| int lane_count) |
| { |
| int lane; |
| uint8_t lane_status; |
| |
| for (lane = 0; lane < lane_count; lane++) { |
| lane_status = intel_get_lane_status(link_status, lane); |
| printk(BIOS_SPEW, |
| "%s: Lane %d, status %02x\n", __func__, |
| lane, lane_status); |
| if ((lane_status & DP_LANE_CR_DONE) == 0) |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* Check to see if channel eq is done on all channels */ |
| #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE| \ |
| DP_LANE_CHANNEL_EQ_DONE| \ |
| DP_LANE_SYMBOL_LOCKED) |
| static int |
| intel_channel_eq_ok(struct intel_dp *intel_dp, |
| uint8_t link_status[DP_LINK_STATUS_SIZE]) |
| { |
| uint8_t lane_align; |
| uint8_t lane_status; |
| int lane; |
| |
| lane_align = intel_dp_link_status(link_status, |
| DP_LANE_ALIGN_STATUS_UPDATED); |
| if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) |
| return 0; |
| for (lane = 0; lane < intel_dp->lane_count; lane++) { |
| lane_status = intel_get_lane_status(link_status, lane); |
| if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int |
| intel_dp_set_link_train(struct intel_dp *intel_dp, |
| uint32_t dp_reg_value, |
| uint8_t dp_train_pat) |
| { |
| int ret; |
| u32 temp; |
| int port = intel_dp->port; |
| int i; |
| |
| printk(BIOS_SPEW, "%s: dp_reg_value %08lx dp_train_pat %02x\n", |
| __func__, (unsigned long) dp_reg_value, dp_train_pat); |
| if (intel_dp->is_haswell){ |
| temp = io_i915_read32(DP_TP_CTL(port)); |
| |
| if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) |
| temp |= DP_TP_CTL_SCRAMBLE_DISABLE; |
| else |
| temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; |
| |
| temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; |
| switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { |
| case DP_TRAINING_PATTERN_DISABLE: |
| temp |= DP_TP_CTL_LINK_TRAIN_IDLE; |
| io_i915_write32( temp, DP_TP_CTL(port)); |
| |
| for(i = 0; i < 10; i++){ |
| u32 status; |
| status = io_i915_read32(DP_TP_STATUS(port)); |
| if (status & DP_TP_STATUS_IDLE_DONE) |
| break; |
| } |
| |
| if (i == 10) |
| printk(BIOS_ERR, |
| "Timed out waiting for DP idle patterns\n"); |
| |
| temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; |
| temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; |
| |
| break; |
| case DP_TRAINING_PATTERN_1: |
| temp |= DP_TP_CTL_LINK_TRAIN_PAT1; |
| break; |
| case DP_TRAINING_PATTERN_2: |
| temp |= DP_TP_CTL_LINK_TRAIN_PAT2; |
| break; |
| case DP_TRAINING_PATTERN_3: |
| temp |= DP_TP_CTL_LINK_TRAIN_PAT3; |
| break; |
| } |
| io_i915_write32( temp, DP_TP_CTL(port)); |
| |
| } else if (intel_dp->has_pch_cpt && |
| (intel_dp->gen != 7 || !is_cpu_edp(intel_dp))) { |
| dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; |
| |
| switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { |
| case DP_TRAINING_PATTERN_DISABLE: |
| dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; |
| break; |
| case DP_TRAINING_PATTERN_1: |
| dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; |
| break; |
| case DP_TRAINING_PATTERN_2: |
| dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; |
| break; |
| case DP_TRAINING_PATTERN_3: |
| printk(BIOS_ERR, |
| "DP training pattern 3 not supported\n"); |
| dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; |
| break; |
| } |
| |
| } else { |
| dp_reg_value &= ~DP_LINK_TRAIN_MASK; |
| |
| switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { |
| case DP_TRAINING_PATTERN_DISABLE: |
| dp_reg_value |= DP_LINK_TRAIN_OFF; |
| break; |
| case DP_TRAINING_PATTERN_1: |
| dp_reg_value |= DP_LINK_TRAIN_PAT_1; |
| break; |
| case DP_TRAINING_PATTERN_2: |
| dp_reg_value |= DP_LINK_TRAIN_PAT_2; |
| break; |
| case DP_TRAINING_PATTERN_3: |
| printk(BIOS_ERR,"DP training pattern 3 not supported\n"); |
| dp_reg_value |= DP_LINK_TRAIN_PAT_2; |
| break; |
| } |
| } |
| |
| io_i915_write32( dp_reg_value, intel_dp->output_reg); |
| //POSTING_READ(intel_dp->output_reg); |
| |
| intel_dp_aux_native_write_1(intel_dp, |
| DP_TRAINING_PATTERN_SET, |
| dp_train_pat); |
| |
| if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
| DP_TRAINING_PATTERN_DISABLE) { |
| ret = intel_dp_aux_native_write(intel_dp, |
| DP_TRAINING_LANE0_SET, |
| intel_dp->train_set, |
| intel_dp->lane_count); |
| if (ret != intel_dp->lane_count){ |
| printk(BIOS_ERR, "%s: wanted %d, got %d\n", __func__, |
| intel_dp->lane_count, ret); |
| return 0; |
| } |
| } |
| |
| printk(BIOS_SPEW, "%s: success\n", __func__); |
| return 1; |
| } |
| |
| /* Enable corresponding port and start training pattern 1 */ |
| void |
| intel_dp_start_link_train(struct intel_dp *intel_dp) |
| { |
| int i; |
| uint8_t voltage; |
| int clock_recovery = 0; |
| int voltage_tries, loop_tries; |
| u32 reg; |
| uint32_t DP = intel_dp->DP; |
| |
| if (intel_dp->is_haswell) |
| intel_ddi_prepare_link_retrain(intel_dp, intel_dp->port); |
| |
| /* Write the link configuration data */ |
| printk(BIOS_SPEW, "Write the link configuration data\n"); |
| intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, |
| intel_dp->link_configuration, |
| DP_LINK_CONFIGURATION_SIZE); |
| printk(BIOS_SPEW, "Written\n"); |
| |
| DP |= DP_PORT_EN; |
| |
| memset(intel_dp->train_set, 0, 4); |
| voltage = 0xff; |
| voltage_tries = 0; |
| loop_tries = 0; |
| clock_recovery = 0; |
| |
| for (;;) { |
| /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
| uint8_t link_status[DP_LINK_STATUS_SIZE]; |
| uint32_t signal_levels; |
| |
| if (intel_dp->is_haswell){ |
| signal_levels = |
| intel_dp_signal_levels_hsw(intel_dp->train_set[0]); |
| DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; |
| printk(BIOS_SPEW, "Haswell: levels %08x DP %08x\n", signal_levels, DP); |
| } else if ((intel_dp->gen == 7) && is_cpu_edp(intel_dp)) { |
| signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
| DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; |
| } else if ((intel_dp->gen == 6) && is_cpu_edp(intel_dp)) { |
| signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
| DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
| } else { |
| signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
| DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
| } |
| printk(BIOS_ERR, "training pattern 1 signal levels %08x\n", signal_levels); |
| |
| if (intel_dp->has_pch_cpt && ((intel_dp->gen == 7) || !is_cpu_edp(intel_dp))) |
| reg = DP | DP_LINK_TRAIN_PAT_1_CPT; |
| else |
| reg = DP | DP_LINK_TRAIN_PAT_1; |
| |
| if (!intel_dp_set_link_train(intel_dp, reg, |
| DP_TRAINING_PATTERN_1 | |
| DP_LINK_SCRAMBLING_DISABLE)) |
| break; |
| /* Set training pattern 1 */ |
| |
| udelay(100); |
| if (!intel_dp_get_link_status(intel_dp, link_status)) { |
| printk(BIOS_ERR, "failed to get link status\n"); |
| break; |
| } |
| |
| if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
| printk(BIOS_ERR, "clock recovery OK\n"); |
| clock_recovery = 1; |
| break; |
| } |
| |
| /* Check to see if we've tried the max voltage */ |
| for (i = 0; i < intel_dp->lane_count; i++) |
| if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) |
| break; |
| if (i == intel_dp->lane_count) { |
| ++loop_tries; |
| if (loop_tries == 5) { |
| printk(BIOS_ERR, "too many full retries, give up\n"); |
| break; |
| } |
| printk(BIOS_SPEW, "%s: reset train set\n", __func__); |
| memset(intel_dp->train_set, 0, 4); |
| voltage_tries = 0; |
| continue; |
| } |
| |
| /* Check to see if we've tried the same voltage 5 times */ |
| if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { |
| ++voltage_tries; |
| if (voltage_tries == 5) { |
| printk(BIOS_ERR, "too many voltage retries, give up\n"); |
| break; |
| } |
| } else |
| voltage_tries = 0; |
| voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; |
| printk(BIOS_SPEW, "%s: voltage now %s\n", __func__, |
| voltage_names[voltage]); |
| |
| /* Compute new intel_dp->train_set as requested by target */ |
| intel_get_adjust_train(intel_dp, link_status); |
| printk(BIOS_SPEW, "%s: new intel train set is " |
| "%02x%02x%02x%02x", |
| __func__, |
| intel_dp->train_set[0], intel_dp->train_set[1], |
| intel_dp->train_set[2], intel_dp->train_set[3]); |
| } |
| |
| intel_dp->DP = DP; |
| } |
| |
| void |
| intel_dp_complete_link_train(struct intel_dp *intel_dp) |
| { |
| int channel_eq = 0; |
| int tries, cr_tries; |
| uint32_t DP = intel_dp->DP; |
| |
| /* channel equalization */ |
| tries = 0; |
| cr_tries = 0; |
| channel_eq = 0; |
| for (;;) { |
| /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
| uint32_t signal_levels; |
| uint8_t link_status[DP_LINK_STATUS_SIZE]; |
| |
| if (cr_tries > 5) { |
| printk(BIOS_ERR, "failed to train DP, aborting\n"); |
| intel_dp_link_down(intel_dp); |
| break; |
| } |
| |
| if (intel_dp->is_haswell) { |
| signal_levels = intel_dp_signal_levels_hsw(intel_dp->train_set[0]); |
| DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; |
| printk(BIOS_SPEW, "%s: new DP %08x\n", __func__, |
| DP); |
| } else if ((intel_dp->gen == 7) && is_cpu_edp(intel_dp)) { |
| signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
| DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; |
| } else if ((intel_dp->gen == 6) && is_cpu_edp(intel_dp)) { |
| signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
| DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
| } else { |
| signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
| DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
| } |
| |
| /* channel eq pattern */ |
| if (!intel_dp_set_link_train(intel_dp, DP, |
| DP_TRAINING_PATTERN_2 | |
| DP_LINK_SCRAMBLING_DISABLE)) |
| break; |
| |
| udelay(40000); /* was 400 */ |
| if (!intel_dp_get_link_status(intel_dp, link_status)) |
| break; |
| |
| /* Make sure clock is still ok */ |
| if (!intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
| printk(BIOS_SPEW, "%s: Clock recovery is NOT ok" |
| ": restarting from the start\n", __func__); |
| intel_dp_start_link_train(intel_dp); |
| cr_tries++; |
| continue; |
| } |
| |
| if (intel_channel_eq_ok(intel_dp, link_status)) { |
| printk(BIOS_SPEW, "%s: success\n", __func__); |
| channel_eq = 1; |
| break; |
| } |
| |
| /* Try 5 times, then try clock recovery if that fails */ |
| if (tries > 5) { |
| printk(BIOS_SPEW, "%s: tries > 5,recovering.\n", |
| __func__); |
| intel_dp_link_down(intel_dp); |
| intel_dp_start_link_train(intel_dp); |
| tries = 0; |
| cr_tries++; |
| continue; |
| } |
| |
| /* Compute new intel_dp->train_set as requested by target */ |
| printk(BIOS_SPEW, "%s: adjust the train\n", __func__); |
| intel_get_adjust_train(intel_dp, link_status); |
| ++tries; |
| } |
| |
| //io_i915_write32(reg, intel_dp->output_reg); |
| ////POSTING_READ(intel_dp->output_reg); |
| intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); |
| } |
| |
| void |
| intel_dp_link_down(struct intel_dp *intel_dp) |
| { |
| uint32_t DP = intel_dp->DP; |
| |
| if ((io_i915_read32(intel_dp->output_reg) & DP_PORT_EN) == 0) |
| return; |
| |
| if (intel_dp->is_haswell){ |
| printk(BIOS_SPEW, "%s: It's a haswell, skip this\n", __func__); |
| return; |
| } |
| if (is_edp(intel_dp)) { |
| DP &= ~DP_PLL_ENABLE; |
| io_i915_write32(DP, intel_dp->output_reg); |
| ////POSTING_READ(intel_dp->output_reg); |
| udelay(100); |
| } |
| |
| if (intel_dp->has_pch_cpt && ((intel_dp->gen == 7) || !is_cpu_edp(intel_dp))) { |
| DP &= ~DP_LINK_TRAIN_MASK_CPT; |
| io_i915_write32(DP | DP_LINK_TRAIN_PAT_IDLE_CPT, intel_dp->output_reg); |
| } else { |
| DP &= ~DP_LINK_TRAIN_MASK; |
| io_i915_write32(DP | DP_LINK_TRAIN_PAT_IDLE, intel_dp->output_reg); |
| } |
| ////POSTING_READ(intel_dp->output_reg); |
| |
| mdelay(17); |
| |
| if (is_edp(intel_dp)) { |
| if (intel_dp->has_pch_cpt && ((intel_dp->gen == 7) || !is_cpu_edp(intel_dp))) |
| DP |= DP_LINK_TRAIN_OFF_CPT; |
| else |
| DP |= DP_LINK_TRAIN_OFF; |
| } |
| |
| DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
| io_i915_write32(DP & ~DP_PORT_EN, intel_dp->output_reg); |
| ////POSTING_READ(intel_dp->output_reg); |
| mdelay(600000); //intel_dp->panel_power_down_delay); |
| } |
| |
| int |
| intel_dp_get_dpcd(struct intel_dp *intel_dp) |
| { |
| int got = 0, want = sizeof(intel_dp->dpcd), rev; |
| got = intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
| want); |
| if (got < want) { |
| printk(BIOS_SPEW, "%s: got %d, wanted %d\n", __func__, got, want); |
| return 0; |
| } |
| |
| rev = intel_dp->dpcd[DP_DPCD_REV]; |
| if (!rev){ |
| printk(BIOS_SPEW, "%s: intel->dp[DP_DPCD_REV] is 0\n", |
| __func__); |
| return 0; |
| } |
| |
| printk(BIOS_SPEW, "DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", |
| intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], |
| intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], |
| intel_dp->dpcd[6], intel_dp->dpcd[7]); |
| return 1; |
| } |
| |
| /* I have no idea how big max downspread is. 1 byte? Hard as hell to find. */ |
| int |
| intel_dp_get_max_downspread(struct intel_dp *intel_dp, u8 *max_downspread) |
| { |
| int got, want = 1; |
| got = intel_dp_aux_native_read_retry(intel_dp, DP_MAX_DOWNSPREAD, max_downspread, |
| want); |
| if (got < want) { |
| printk(BIOS_SPEW, "%s: got %d, wanted %d\n", __func__, got, want); |
| return 0; |
| } |
| |
| printk(BIOS_SPEW, "%s: max_downspread is %02x\n", __func__, *max_downspread); |
| return 1; |
| } |
| |
| void intel_dp_set_m_n_regs(struct intel_dp *intel_dp) |
| { |
| io_i915_write32(0x7e4a0000, PIPE_DATA_M1(intel_dp->transcoder)); |
| /* io_i915_write32(0x00800000,0x6f034); */ |
| /* Write to 0x6f030 has to be 0x7e4ayyyy -- First four hex digits are important. |
| However, with our formula we always see values 0x7e43yyyy (1366 panel) and |
| 0x7e42yyy (1280 panel) */ |
| /* io_i915_write32(TU_SIZE(intel_dp->m_n.tu) | intel_dp->m_n.gmch_m,PIPE_DATA_M1(intel_dp->transcoder)); */ |
| io_i915_write32(intel_dp->m_n.gmch_n, PIPE_DATA_N1(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->m_n.link_m, PIPE_LINK_M1(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->m_n.link_n, PIPE_LINK_N1(intel_dp->transcoder)); |
| } |
| |
| void intel_dp_set_resolution(struct intel_dp *intel_dp) |
| { |
| io_i915_write32(intel_dp->htotal, HTOTAL(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->hblank, HBLANK(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->hsync, HSYNC(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->vtotal, VTOTAL(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->vblank, VBLANK(intel_dp->transcoder)); |
| io_i915_write32(intel_dp->vsync, VSYNC(intel_dp->transcoder)); |
| } |
| |
| int intel_dp_get_training_pattern(struct intel_dp *intel_dp, |
| u8 *recv) |
| { |
| return intel_dp_aux_native_read_retry(intel_dp, |
| DP_TRAINING_PATTERN_SET, |
| recv, |
| 0); |
| } |
| |
| int intel_dp_get_lane_count(struct intel_dp *intel_dp, |
| u8 *recv) |
| { |
| return intel_dp_aux_native_read_retry(intel_dp, |
| DP_LANE_COUNT_SET, |
| recv, |
| 0); |
| } |
| |
| int intel_dp_get_lane_align_status(struct intel_dp *intel_dp, |
| u8 *recv) |
| { |
| return intel_dp_aux_native_read_retry(intel_dp, |
| DP_LANE_ALIGN_STATUS_UPDATED, |
| recv, |
| 0); |
| } |