diff options
Diffstat (limited to 'src/drivers/intel/gma/drm_dp_helper.c')
| -rw-r--r-- | src/drivers/intel/gma/drm_dp_helper.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/src/drivers/intel/gma/drm_dp_helper.c b/src/drivers/intel/gma/drm_dp_helper.c deleted file mode 100644 index 66072263f4..0000000000 --- a/src/drivers/intel/gma/drm_dp_helper.c +++ /dev/null @@ -1,119 +0,0 @@ -/* - * Copyright 2013 Google Inc. - * Copyright © 2009 Keith Packard - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that copyright - * notice and this permission notice appear in supporting documentation, and - * that the name of the copyright holders not be used in advertising or - * publicity pertaining to distribution of the software without specific, - * written prior permission. The copyright holders make no representations - * about the suitability of this software for any purpose. It is provided "as - * is" without express or implied warranty. - * - * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO - * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR - * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, - * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER - * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE - * OF THIS SOFTWARE. - */ - -#include <console/console.h> -#include <stdint.h> -#include <delay.h> -#include <drivers/intel/gma/i915.h> -#include <string.h> - -#include <edid.h> - -/* reduced a lot for coreboot. */ -/** - * DOC: dp helpers - * - * These functions contain some common logic and helpers at various - * abstraction levels to deal with Display Port sink devices and - * related things like DP aux channel transfers, EDID reading over DP - * aux channels, decoding certain DPCD blocks, ... - */ - - -/* Helpers for DP link training */ -static u8 dp_link_status(u8 link_status[DP_LINK_STATUS_SIZE], int r) -{ - printk(BIOS_SPEW, "%s: %d, %d, %d\n", __func__, - r, r - DP_LANE0_1_STATUS, - link_status[r - DP_LANE0_1_STATUS]); - return link_status[r - DP_LANE0_1_STATUS]; -} - -static u8 dp_get_lane_status(u8 link_status[DP_LINK_STATUS_SIZE], - int lane) -{ - int i = DP_LANE0_1_STATUS + (lane >> 1); - int s = (lane & 1) * 4; - u8 l = dp_link_status(link_status, i); - return (l >> s) & 0xf; -} - -int drm_dp_channel_eq_ok(u8 link_status[DP_LINK_STATUS_SIZE], - int lane_count) -{ - u8 lane_align; - u8 lane_status; - int lane; - - lane_align = dp_link_status(link_status, - DP_LANE_ALIGN_STATUS_UPDATED); - if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) - return 0; - for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); - if ((lane_status & DP_CHANNEL_EQ_BITS) != DP_CHANNEL_EQ_BITS) - return 0; - } - return 1; -} - -int drm_dp_clock_recovery_ok(u8 link_status[DP_LINK_STATUS_SIZE], - int lane_count) -{ - int lane; - u8 lane_status; - - for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); - if ((lane_status & DP_LANE_CR_DONE) == 0) - return 0; - } - return 1; -} - -u8 drm_dp_get_adjust_request_voltage(u8 link_status[DP_LINK_STATUS_SIZE], - int lane) -{ - int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); - int s = ((lane & 1) ? - DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : - DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); - u8 l = dp_link_status(link_status, i); - - printk(BIOS_SPEW, "%s: i %d s %d l %d return %d\n", - __func__, i, s, l, - ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT); - return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; -} - -u8 drm_dp_get_adjust_request_pre_emphasis(u8 link_status[DP_LINK_STATUS_SIZE], - int lane) -{ - int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); - int s = ((lane & 1) ? - DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : - DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); - u8 l = dp_link_status(link_status, i); - - return ((l >> s) & 0x3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; -} |