diff options
| author | YongWook Shin <yongwook.shin@samsung.com> | 2023-12-04 15:09:51 +0900 |
|---|---|---|
| committer | Petri Gynther <pgynther@google.com> | 2024-01-09 19:38:46 -0800 |
| commit | 7c7950abe975e54beb994750ae36dd7495108906 (patch) | |
| tree | 76f076fb81da2f6d8d9f77804b4789bcdfa1dafa | |
| parent | 696ce843bc7f703acbabce99472f9f8bd79e07df (diff) | |
| download | display-7c7950abe975e54beb994750ae36dd7495108906.tar.gz | |
drm: samsung: boost charge pump up
Synopsys guides the setting for charge pump bias 200% to
fix shmoo issue.
Bug: 309067706
Signed-off-by: YongWook Shin <yongwook.shin@samsung.com>
Change-Id: I1e20a85de67f8a7fb564f8ef13ef0c407ac007fb
| -rw-r--r-- | samsung/cal_9865/dp_reg.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/samsung/cal_9865/dp_reg.c b/samsung/cal_9865/dp_reg.c index 3d9c5b0..4ef7049 100644 --- a/samsung/cal_9865/dp_reg.c +++ b/samsung/cal_9865/dp_reg.c @@ -380,6 +380,17 @@ static void dpphy_reg_cr_write_mask(u16 addr, u16 data, u16 mask) cal_log_debug(0, "[CR][%04X][%04X]", addr, old); } +/* + * Boost charge pump bias current + * [10:8] mpllb_ctr_cp_int_ref + * [2:0] mplla_ctr_cp_int_ref + */ +static void dpphy_reg_enable_cp_current_boost(void) +{ + dpphy_reg_cr_write_mask(0x5c, 0x400, 0x700); + dpphy_reg_cr_write_mask(0x5c, 0x4, 0x7); +} + /* fix abnormal lane2 signal */ static void dpphy_reg_usb_tune_reset(enum plug_orientation orient) { @@ -935,6 +946,10 @@ static void dpphy_reg_init(struct dp_hw_config *hw_config, bool reconfig) /* Assert DP Alt-mode Disable ACK */ dpphy_reg_set_config19_dpalt_disable_ack(1); + /* CP(Charge Pump) Bias Boosting X2 */ + if (!reconfig) + dpphy_reg_enable_cp_current_boost(); + /* Set Master PLL-B for DP as Link_BW */ dpphy_reg_set_mpllb(hw_config, reconfig); cal_log_debug(0, "set MPLLB as link_bw.\n"); |