From 0f037bdee1a12947a0c55b21a05f57793332bc07 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 18 Oct 2012 10:15:27 +0200 Subject: [PATCH] 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 Acked-by: Dave Airlie Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_dp_helper.c | 27 ++++++++++++++++++++++ drivers/gpu/drm/i915/intel_dp.c | 30 ++---------------------- drivers/gpu/drm/radeon/atombios_dp.c | 34 ++-------------------------- include/drm/drm_dp_helper.h | 4 ++++ 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_ */ -- GitLab