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authorDaniel Vetter <daniel.vetter@ffwll.ch>2012-10-18 10:15:27 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-10-22 22:34:45 +0200
commit0f037bdee1a12947a0c55b21a05f57793332bc07 (patch)
tree200cae72c4681af7849422ac1ee3b5937de55603
parent01916270b840f7f37b7daab936add1747d6afbbf (diff)
downloadlinux-linaro-stable-0f037bdee1a12947a0c55b21a05f57793332bc07.tar.gz
drm: extract helpers to compute new training values from sink request
Safe for the minor difference that the intel versions get an offset into the link_status as an argument, both are the same again. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r--drivers/gpu/drm/drm_dp_helper.c27
-rw-r--r--drivers/gpu/drm/i915/intel_dp.c30
-rw-r--r--drivers/gpu/drm/radeon/atombios_dp.c34
-rw-r--r--include/drm/drm_dp_helper.h4
4 files changed, 35 insertions, 60 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 1378b789bd10..9461e2f27316 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -255,3 +255,30 @@ bool drm_dp_clock_recovery_ok(u8 link_status[DP_LINK_STATUS_SIZE],
return true;
}
EXPORT_SYMBOL(drm_dp_clock_recovery_ok);
+
+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);
+
+ return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
+}
+EXPORT_SYMBOL(drm_dp_get_adjust_request_voltage);
+
+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;
+}
+EXPORT_SYMBOL(drm_dp_get_adjust_request_pre_emphasis);
+
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 401db1d42da1..016febc9b55e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1435,31 +1435,6 @@ intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_
DP_LINK_STATUS_SIZE);
}
-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;
-}
-
-
#if 0
static char *voltage_names[] = {
"0.4V", "0.6V", "0.8V", "1.2V"
@@ -1538,13 +1513,12 @@ intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_ST
uint8_t v = 0;
uint8_t p = 0;
int lane;
- uint8_t *adjust_request = link_status + (DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS);
uint8_t voltage_max;
uint8_t preemph_max;
for (lane = 0; lane < intel_dp->lane_count; lane++) {
- uint8_t this_v = intel_get_adjust_request_voltage(adjust_request, lane);
- uint8_t this_p = intel_get_adjust_request_pre_emphasis(adjust_request, 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;
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 65f0c6049472..5ad8bfacf728 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -289,36 +289,6 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
/***** general DP utility functions *****/
-static u8 dp_link_status(u8 link_status[DP_LINK_STATUS_SIZE], int r)
-{
- return link_status[r - DP_LANE0_1_STATUS];
-}
-
-static u8 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);
-
- return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
-}
-
-static u8 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;
-}
-
#define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_1200
#define DP_PRE_EMPHASIS_MAX DP_TRAIN_PRE_EMPHASIS_9_5
@@ -331,8 +301,8 @@ static void dp_get_adjust_train(u8 link_status[DP_LINK_STATUS_SIZE],
int lane;
for (lane = 0; lane < lane_count; lane++) {
- u8 this_v = dp_get_adjust_request_voltage(link_status, lane);
- u8 this_p = dp_get_adjust_request_pre_emphasis(link_status, lane);
+ u8 this_v = drm_dp_get_adjust_request_voltage(link_status, lane);
+ u8 this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane);
DRM_DEBUG_KMS("requested signal parameters: lane %d voltage %s pre_emph %s\n",
lane,
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 89e92c95cf86..57e6dbd0580c 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -328,5 +328,9 @@ bool drm_dp_channel_eq_ok(u8 link_status[DP_LINK_STATUS_SIZE],
int lane_count);
bool drm_dp_clock_recovery_ok(u8 link_status[DP_LINK_STATUS_SIZE],
int lane_count);
+u8 drm_dp_get_adjust_request_voltage(u8 link_status[DP_LINK_STATUS_SIZE],
+ int lane);
+u8 drm_dp_get_adjust_request_pre_emphasis(u8 link_status[DP_LINK_STATUS_SIZE],
+ int lane);
#endif /* _DRM_DP_HELPER_H_ */