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From: Kuogee Hsieh <quic_khsieh@quicinc.com>
To: <robdclark@gmail.com>, <sean@poorly.run>, <swboyd@chromium.org>,
	<dianders@chromium.org>, <vkoul@kernel.org>, <daniel@ffwll.ch>,
	<airlied@linux.ie>, <agross@kernel.org>,
	<dmitry.baryshkov@linaro.org>, <bjorn.andersson@linaro.org>
Cc: <quic_abhinavk@quicinc.com>, <quic_khsieh@quicinc.com>,
	<quic_sbillaka@quicinc.com>, <freedreno@lists.freedesktop.org>,
	<dri-devel@lists.freedesktop.org>,
	<linux-arm-msm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH] drm/msm/dp: remove limitation of link rate at 5.4G to support HBR3
Date: Mon, 31 Oct 2022 10:27:25 -0700	[thread overview]
Message-ID: <1667237245-24988-1-git-send-email-quic_khsieh@quicinc.com> (raw)

An HBR3-capable device shall also support TPS4. Since TPS4 feature
had been implemented already, it is not necessary to limit link
rate at HBR2 (5.4G). This patch remove this limitation to support
HBR3 (8.1G) link rate.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_panel.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 5149ceb..3344f5a 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -78,10 +78,6 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel)
 	if (link_info->num_lanes > dp_panel->max_dp_lanes)
 		link_info->num_lanes = dp_panel->max_dp_lanes;
 
-	/* Limit support upto HBR2 until HBR3 support is added */
-	if (link_info->rate >= (drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4)))
-		link_info->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4);
-
 	drm_dbg_dp(panel->drm_dev, "version: %d.%d\n", major, minor);
 	drm_dbg_dp(panel->drm_dev, "link_rate=%d\n", link_info->rate);
 	drm_dbg_dp(panel->drm_dev, "lane_count=%d\n", link_info->num_lanes);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


             reply	other threads:[~2022-10-31 17:27 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-31 17:27 Kuogee Hsieh [this message]
2022-10-31 18:46 ` [PATCH] drm/msm/dp: remove limitation of link rate at 5.4G to support HBR3 Dmitry Baryshkov
2022-10-31 21:11   ` Kuogee Hsieh
2022-11-01  0:08     ` Doug Anderson
2022-11-01  0:15       ` Dmitry Baryshkov
2022-11-01 14:37         ` Doug Anderson
2022-11-02 15:47           ` Doug Anderson
2022-11-02 17:23             ` Dmitry Baryshkov
2022-11-02 17:28               ` Doug Anderson
2022-11-02 18:04                 ` Dmitry Baryshkov
2022-11-09 23:47                   ` Kuogee Hsieh
2022-11-10  7:43                     ` Dmitry Baryshkov
2022-11-15 18:43                       ` Kuogee Hsieh
2022-11-16 13:40                         ` Dmitry Baryshkov
2022-11-02 17:15           ` Dmitry Baryshkov
2022-11-02 17:25             ` Doug Anderson
2022-11-02 17:42               ` Dmitry Baryshkov

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