diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_aux.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index 4f4a0e3b3114..b8a53bb174da 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -61,9 +61,8 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp) u32 status; int ret; - ret = __intel_de_wait_for_register(i915, ch_ctl, - DP_AUX_CH_CTL_SEND_BUSY, 0, - 2, timeout_ms, &status); + ret = intel_de_wait_custom(i915, ch_ctl, DP_AUX_CH_CTL_SEND_BUSY, 0, + 2, timeout_ms, &status); if (ret == -ETIMEDOUT) drm_err(&i915->drm, @@ -143,9 +142,15 @@ static int intel_dp_aux_sync_len(void) return precharge + preamble; } -static int intel_dp_aux_fw_sync_len(void) +int intel_dp_aux_fw_sync_len(void) { - int precharge = 10; /* 10-16 */ + /* + * We faced some glitches on Dell Precision 5490 MTL laptop with panel: + * "Manufacturer: AUO, Model: 63898" when using HW default 18. Using 20 + * is fixing these problems with the panel. It is still within range + * mentioned in eDP specification. + */ + int precharge = 12; /* 10-16 */ int preamble = 8; return precharge + preamble; |