From: Kuogee Hsieh <quic_khsieh@quicinc.com> To: <dri-devel@lists.freedesktop.org>, <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: Kuogee Hsieh <quic_khsieh@quicinc.com>, <quic_abhinavk@quicinc.com>, <quic_sbillaka@quicinc.com>, <freedreno@lists.freedesktop.org>, <linux-arm-msm@vger.kernel.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH v6 3/4] drm/msm/dp: parser link-frequencies as property of dp_out endpoint Date: Wed, 30 Nov 2022 15:51:49 -0800 [thread overview] Message-ID: <1669852310-22360-4-git-send-email-quic_khsieh@quicinc.com> (raw) In-Reply-To: <1669852310-22360-1-git-send-email-quic_khsieh@quicinc.com> Add capability to parser and retrieve max DP link supported rate from link-frequencies property of dp_out endpoint. Changes in v6: -- second patch after split parser patch into two patches Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> --- drivers/gpu/drm/msm/dp/dp_parser.c | 16 ++++++++++++++++ drivers/gpu/drm/msm/dp/dp_parser.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index b06ff60..2006341 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -95,6 +95,7 @@ static int dp_parser_misc(struct dp_parser *parser) { struct device_node *of_node = parser->pdev->dev.of_node; struct device_node *endpoint; + u64 frequency; int cnt; /* @@ -103,6 +104,7 @@ static int dp_parser_misc(struct dp_parser *parser) cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES); if (cnt > 0) { parser->max_dp_lanes = cnt; + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ return 0; } @@ -116,8 +118,22 @@ static int dp_parser_misc(struct dp_parser *parser) parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ else parser->max_dp_lanes = cnt; + + cnt = of_property_count_u64_elems(endpoint, "link-frequencies"); + if (cnt < 0) { + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ + } else { + if (cnt > DP_MAX_NUM_DP_LANES) + cnt = DP_MAX_NUM_DP_LANES; + + of_property_read_u64_index(endpoint, "link-frequencies", + cnt - 1, &frequency); + + parser->max_dp_link_rate = (frequency / 1000); /* kbits */ + } } else { parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ } return 0; diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 866c1a8..3ddf639 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -15,6 +15,7 @@ #define DP_LABEL "MDSS DP DISPLAY" #define DP_MAX_PIXEL_CLK_KHZ 675000 #define DP_MAX_NUM_DP_LANES 4 +#define DP_LINK_RATE_HBR2 540000 enum dp_pm_type { DP_CORE_PM, @@ -119,6 +120,7 @@ struct dp_parser { struct dp_io io; struct dp_display_data disp_data; u32 max_dp_lanes; + u32 max_dp_link_rate; struct drm_bridge *next_bridge; int (*parse)(struct dp_parser *parser); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
WARNING: multiple messages have this Message-ID (diff)
From: Kuogee Hsieh <quic_khsieh@quicinc.com> To: <dri-devel@lists.freedesktop.org>, <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_sbillaka@quicinc.com, linux-arm-msm@vger.kernel.org, quic_abhinavk@quicinc.com, linux-kernel@vger.kernel.org, Kuogee Hsieh <quic_khsieh@quicinc.com>, freedreno@lists.freedesktop.org Subject: [PATCH v6 3/4] drm/msm/dp: parser link-frequencies as property of dp_out endpoint Date: Wed, 30 Nov 2022 15:51:49 -0800 [thread overview] Message-ID: <1669852310-22360-4-git-send-email-quic_khsieh@quicinc.com> (raw) In-Reply-To: <1669852310-22360-1-git-send-email-quic_khsieh@quicinc.com> Add capability to parser and retrieve max DP link supported rate from link-frequencies property of dp_out endpoint. Changes in v6: -- second patch after split parser patch into two patches Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> --- drivers/gpu/drm/msm/dp/dp_parser.c | 16 ++++++++++++++++ drivers/gpu/drm/msm/dp/dp_parser.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index b06ff60..2006341 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -95,6 +95,7 @@ static int dp_parser_misc(struct dp_parser *parser) { struct device_node *of_node = parser->pdev->dev.of_node; struct device_node *endpoint; + u64 frequency; int cnt; /* @@ -103,6 +104,7 @@ static int dp_parser_misc(struct dp_parser *parser) cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES); if (cnt > 0) { parser->max_dp_lanes = cnt; + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ return 0; } @@ -116,8 +118,22 @@ static int dp_parser_misc(struct dp_parser *parser) parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ else parser->max_dp_lanes = cnt; + + cnt = of_property_count_u64_elems(endpoint, "link-frequencies"); + if (cnt < 0) { + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ + } else { + if (cnt > DP_MAX_NUM_DP_LANES) + cnt = DP_MAX_NUM_DP_LANES; + + of_property_read_u64_index(endpoint, "link-frequencies", + cnt - 1, &frequency); + + parser->max_dp_link_rate = (frequency / 1000); /* kbits */ + } } else { parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ } return 0; diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 866c1a8..3ddf639 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -15,6 +15,7 @@ #define DP_LABEL "MDSS DP DISPLAY" #define DP_MAX_PIXEL_CLK_KHZ 675000 #define DP_MAX_NUM_DP_LANES 4 +#define DP_LINK_RATE_HBR2 540000 enum dp_pm_type { DP_CORE_PM, @@ -119,6 +120,7 @@ struct dp_parser { struct dp_io io; struct dp_display_data disp_data; u32 max_dp_lanes; + u32 max_dp_link_rate; struct drm_bridge *next_bridge; int (*parse)(struct dp_parser *parser); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2022-11-30 23:52 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-30 23:51 [PATCH v6 0/4] Add data-lanes and link-frequencies to dp_out endpoint Kuogee Hsieh 2022-11-30 23:51 ` Kuogee Hsieh 2022-11-30 23:51 ` [PATCH v6 1/4] arm64: dts: qcom: add data-lanes and link-freuencies into " Kuogee Hsieh 2022-11-30 23:51 ` Kuogee Hsieh 2022-12-01 0:07 ` Dmitry Baryshkov 2022-12-01 0:07 ` Dmitry Baryshkov 2022-12-01 0:21 ` Dmitry Baryshkov 2022-12-01 0:21 ` Dmitry Baryshkov 2022-12-01 17:32 ` Kuogee Hsieh 2022-12-01 17:32 ` Kuogee Hsieh 2022-12-01 17:49 ` Dmitry Baryshkov 2022-12-01 17:49 ` Dmitry Baryshkov 2022-12-01 20:59 ` Kuogee Hsieh 2022-12-01 20:59 ` Kuogee Hsieh 2022-12-01 17:34 ` Kuogee Hsieh 2022-12-01 17:34 ` Kuogee Hsieh 2022-12-01 17:36 ` Dmitry Baryshkov 2022-12-01 17:36 ` Dmitry Baryshkov 2022-11-30 23:51 ` [PATCH v6 2/4] drm/msm/dp: parser data-lanes as property of " Kuogee Hsieh 2022-11-30 23:51 ` Kuogee Hsieh 2022-11-30 23:58 ` Dmitry Baryshkov 2022-11-30 23:58 ` Dmitry Baryshkov 2022-11-30 23:51 ` Kuogee Hsieh [this message] 2022-11-30 23:51 ` [PATCH v6 3/4] drm/msm/dp: parser link-frequencies " Kuogee Hsieh 2022-12-01 0:26 ` Dmitry Baryshkov 2022-12-01 0:26 ` Dmitry Baryshkov 2022-12-01 21:13 ` kernel test robot 2022-12-01 21:13 ` kernel test robot 2022-12-01 21:44 ` kernel test robot 2022-12-01 21:44 ` kernel test robot 2022-11-30 23:51 ` [PATCH v6 4/4] drm/msm/dp: add support of max dp link rate Kuogee Hsieh 2022-11-30 23:51 ` Kuogee Hsieh
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