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drm/i915: fetch eDP configuration data from the VBT

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We need to use some of these values in eDP configurations, so be sure to
fetch them and store them in the i915 private structure.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Jesse Barnes 2010-10-07 16:01:14 -07:00 committed by Chris Wilson
parent 723bfd707a
commit 9f0e7ff4b3
3 changed files with 60 additions and 19 deletions
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16
drivers/gpu/drm/i915/i915_drv.h
View File

@ -339,16 +339,16 @@ typedef struct drm_i915_private {
unsigned int int_crt_support:1;
unsigned int lvds_use_ssc:1;
int lvds_ssc_freq;
struct {
u8 rate:4;
u8 lanes:4;
u8 preemphasis:4;
u8 vswing:4;
int rate;
int lanes;
int preemphasis;
int vswing;
u8 initialized:1;
u8 support:1;
u8 bpp:6;
bool initialized;
bool support;
int bpp;
struct edp_power_seq pps;
} edp;
struct notifier_block lid_notifier;

60
drivers/gpu/drm/i915/intel_bios.c
View File

@ -24,6 +24,7 @@
* Eric Anholt <eric@anholt.net>
*
*/
#include <drm/drm_dp_helper.h>
#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
@ -413,6 +414,8 @@ static void
parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
{
struct bdb_edp *edp;
struct edp_power_seq *edp_pps;
struct edp_link_params *edp_link_params;
edp = find_section(bdb, BDB_EDP);
if (!edp) {
@ -437,19 +440,54 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
break;
}
dev_priv->edp.rate = edp->link_params[panel_type].rate;
dev_priv->edp.lanes = edp->link_params[panel_type].lanes;
dev_priv->edp.preemphasis = edp->link_params[panel_type].preemphasis;
dev_priv->edp.vswing = edp->link_params[panel_type].vswing;
/* Get the eDP sequencing and link info */
edp_pps = &edp->power_seqs[panel_type];
edp_link_params = &edp->link_params[panel_type];
DRM_DEBUG_KMS("eDP vBIOS settings: bpp=%d, rate=%d, lanes=%d, preemphasis=%d, vswing=%d\n",
dev_priv->edp.bpp,
dev_priv->edp.rate,
dev_priv->edp.lanes,
dev_priv->edp.preemphasis,
dev_priv->edp.vswing);
dev_priv->edp.pps = *edp_pps;
dev_priv->edp.initialized = true;
dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
DP_LINK_BW_1_62;
switch (edp_link_params->lanes) {
case 0:
dev_priv->edp.lanes = 1;
break;
case 1:
dev_priv->edp.lanes = 2;
break;
case 3:
default:
dev_priv->edp.lanes = 4;
break;
}
switch (edp_link_params->preemphasis) {
case 0:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
break;
case 1:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
break;
case 2:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
break;
case 3:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
break;
}
switch (edp_link_params->vswing) {
case 0:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
break;
case 1:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
break;
case 2:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
break;
case 3:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
break;
}
}
static void

3
include/drm/drm_dp_helper.h
View File

@ -23,6 +23,9 @@
#ifndef _DRM_DP_HELPER_H_
#define _DRM_DP_HELPER_H_
#include <linux/types.h>
#include <linux/i2c.h>
/* From the VESA DisplayPort spec */
#define AUX_NATIVE_WRITE 0x8