All of lore.kernel.org
 help / color / mirror / Atom feed
From: Kuogee Hsieh <khsieh@codeaurora.org>
To: robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org,
	vkoul@kernel.org, agross@kernel.org, bjorn.andersson@linaro.org
Cc: tanmay@codeaurora.org, abhinavk@codeaurora.org,
	aravindh@codeaurora.org, khsieh@codeaurora.org,
	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/2] phy/qualcomm: add hbr3_hbr2 voltage and premphasis swing table
Date: Thu, 18 Feb 2021 08:51:10 -0800	[thread overview]
Message-ID: <1613667070-27613-1-git-send-email-khsieh@codeaurora.org> (raw)

Add hbr3_hbr2 voltage and premphasis swing table to support
HBR3 link rate.

Changes in V2:
-- replaced upper case with lower case at hbr3_hbr2 table

Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 0939a9e..4dcc074 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -2965,6 +2965,20 @@ static void qcom_qmp_phy_dp_aux_init(struct qmp_phy *qphy)
 	       qphy->pcs + QSERDES_V3_DP_PHY_AUX_INTERRUPT_MASK);
 }
 
+static const u8 qmp_dp_v3_pre_emphasis_hbr3_hbr2[4][4] = {
+        { 0x00, 0x0c, 0x15, 0x1a },
+        { 0x02, 0x0e, 0x16, 0xff },
+        { 0x02, 0x11, 0xff, 0xff },
+        { 0x04, 0xff, 0xff, 0xff }
+};
+
+static const u8 qmp_dp_v3_voltage_swing_hbr3_hbr2[4][4] = {
+        { 0x02, 0x12, 0x16, 0x1a },
+        { 0x09, 0x19, 0x1f, 0xff },
+        { 0x10, 0x1f, 0xff, 0xff },
+        { 0x1f, 0xff, 0xff, 0xff }
+};
+
 static const u8 qmp_dp_v3_pre_emphasis_hbr_rbr[4][4] = {
 	{ 0x00, 0x0c, 0x14, 0x19 },
 	{ 0x00, 0x0b, 0x12, 0xff },
@@ -3000,8 +3014,13 @@ static void qcom_qmp_phy_configure_dp_tx(struct qmp_phy *qphy)
 		drvr_en = 0x10;
 	}
 
-	voltage_swing_cfg = qmp_dp_v3_voltage_swing_hbr_rbr[v_level][p_level];
-	pre_emphasis_cfg = qmp_dp_v3_pre_emphasis_hbr_rbr[v_level][p_level];
+	if (dp_opts->link_rate <= 2700) {
+		voltage_swing_cfg = qmp_dp_v3_voltage_swing_hbr_rbr[v_level][p_level];
+		pre_emphasis_cfg = qmp_dp_v3_pre_emphasis_hbr_rbr[v_level][p_level];
+	} else {
+		voltage_swing_cfg = qmp_dp_v3_voltage_swing_hbr3_hbr2[v_level][p_level];
+		pre_emphasis_cfg = qmp_dp_v3_pre_emphasis_hbr3_hbr2[v_level][p_level];
+	}
 
 	/* TODO: Move check to config check */
 	if (voltage_swing_cfg == 0xFF && pre_emphasis_cfg == 0xFF)
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


             reply	other threads:[~2021-02-18 17:48 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-18 16:51 Kuogee Hsieh [this message]
2021-02-18 18:46 ` [PATCH v2 1/2] phy/qualcomm: add hbr3_hbr2 voltage and premphasis swing table Stephen Boyd
2021-02-24 19:39   ` Stephen Boyd
2021-02-24 22:42     ` khsieh
2021-02-18 18:47 ` Stephen Boyd
2021-03-15 10:11 ` Vinod Koul

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1613667070-27613-1-git-send-email-khsieh@codeaurora.org \
    --to=khsieh@codeaurora.org \
    --cc=abhinavk@codeaurora.org \
    --cc=agross@kernel.org \
    --cc=aravindh@codeaurora.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=robdclark@gmail.com \
    --cc=sean@poorly.run \
    --cc=swboyd@chromium.org \
    --cc=tanmay@codeaurora.org \
    --cc=vkoul@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.