| Message ID | 1670539015-11808-1-git-send-email-quic_khsieh@quicinc.com |
|---|---|
| Headers | show |
| Series | Add data-lanes and link-frequencies to dp_out endpoint | expand |
On 09/12/2022 00:36, Kuogee Hsieh wrote: > 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 > > Changes in v7: > -- without checking cnt against DP_MAX_NUM_DP_LANES to retrieve link rate > > Changes in v9: > -- separate parser link-frequencies out of data-lanes > > Changes in v10: > -- add dp_parser_link_frequencies() > > Changes in v11: > -- return 0 if(!endpoint) > > Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> > --- > drivers/gpu/drm/msm/dp/dp_parser.c | 27 +++++++++++++++++++++++++++ > drivers/gpu/drm/msm/dp/dp_parser.h | 2 ++ > 2 files changed, 29 insertions(+) > > diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c > index b5f7e70..9a7dcd4 100644 > --- a/drivers/gpu/drm/msm/dp/dp_parser.c > +++ b/drivers/gpu/drm/msm/dp/dp_parser.c > @@ -91,6 +91,29 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) > return 0; > } > > +static u32 dp_parser_link_frequencies(struct device_node *of_node) > +{ > + struct device_node *endpoint; > + u64 frequency = 0; > + int cnt = 0; > + > + endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */ > + if (!endpoint) > + return 0; > + > + cnt = of_property_count_u64_elems(endpoint, "link-frequencies"); > + > + if (cnt > 0) > + of_property_read_u64_index(endpoint, "link-frequencies", > + cnt - 1, &frequency); > + of_node_put(endpoint); > + > + frequency /= 10; /* from symbol rate to link rate */ > + frequency /= 1000; /* kbytes */ > + > + return frequency; > +} > + > static int dp_parser_misc(struct dp_parser *parser) > { > struct device_node *of_node = parser->pdev->dev.of_node; > @@ -113,6 +136,10 @@ static int dp_parser_misc(struct dp_parser *parser) > parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ > } > > + parser->max_dp_link_rate = dp_parser_link_frequencies(of_node); > + if (!parser->max_dp_link_rate) > + parser->max_dp_link_rate = DP_LINK_RATE_HBR2; /* 540000 khz */ Drop the comment please. One can jump to the defined value to see what is it equal to. So it adds no information. > + > return 0; > } > > diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h > index 866c1a8..6b10c3e 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 /* khz */ kbytes, not kHz. Otherwise it would have been 5400000. > > 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);
On 08/12/2022 23:36, Kuogee Hsieh wrote: > Move data-lanes property from mdss_dp node to dp_out endpoint. Also > add link-frequencies property into dp_out endpoint as well. The last > frequency specified at link-frequencies will be the max link rate > supported by DP. > > Changes in v5: > -- revert changes at sc7180.dtsi and sc7280.dtsi > -- add &dp_out to sc7180-trogdor.dtsi and sc7280-herobrine.dtsi > > Changes in v6: > -- add data-lanes and link-frequencies to yaml > > Changes in v7: > -- change 160000000 to 1620000000 > -- separate yaml to different patch > > Changes in v8: > -- correct Bjorn mail address to kernel.org > > Changes in v9: > -- use symbol rate (hz) for link-frequencies at dp_out at sc7180_trogdor.dtsi > > Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> > --- > arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 6 +++++- > arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi | 6 +++++- > 2 files changed, 10 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi > index eae22e6..93b0cde 100644 > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi > @@ -814,7 +814,11 @@ hp_i2c: &i2c9 { > status = "okay"; > pinctrl-names = "default"; > pinctrl-0 = <&dp_hot_plug_det>; > - data-lanes = <0 1>; > +}; > + > +&dp_out { > + data-lanes = <0 1>; Why adding two spaces? Just cut previous line and paste it, don't change it. > + link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000>; > }; > > &pm6150_adc { > diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi > index c11e371..3c7a9d8 100644 > --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi > +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi > @@ -442,7 +442,11 @@ ap_i2c_tpm: &i2c14 { > status = "okay"; > pinctrl-names = "default"; > pinctrl-0 = <&dp_hot_plug_det>; > - data-lanes = <0 1>; > +}; > + > +&dp_out { > + data-lanes = <0 1>; Ditto Best regards, Krzysztof
Add DP both data-lanes and link-frequencies property to dp_out endpoint and support functions to DP driver. Kuogee Hsieh (5): arm64: dts: qcom: add data-lanes and link-freuencies into dp_out endpoint dt-bindings: msm/dp: add data-lanes and link-frequencies property drm/msm/dp: parser data-lanes as property of dp_out endpoint drm/msm/dp: parser link-frequencies as property of dp_out endpoint drm/msm/dp: add support of max dp link rate .../bindings/display/msm/dp-controller.yaml | 27 +++++++++++ arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 6 ++- arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi | 6 ++- drivers/gpu/drm/msm/dp/dp_display.c | 4 ++ drivers/gpu/drm/msm/dp/dp_panel.c | 7 +-- drivers/gpu/drm/msm/dp/dp_panel.h | 1 + drivers/gpu/drm/msm/dp/dp_parser.c | 52 ++++++++++++++++++---- drivers/gpu/drm/msm/dp/dp_parser.h | 2 + 8 files changed, 92 insertions(+), 13 deletions(-)