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Date: Thu, 8 Dec 2022 15:12:54 -0800
From: Kuogee Hsieh <quic_khsieh@...cinc.com>
To: Bjorn Andersson <quic_bjorande@...cinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: Rob Clark <robdclark@...il.com>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Kalyan Thota <quic_kalyant@...cinc.com>,
Jessica Zhang <quic_jesszhan@...cinc.com>,
"Johan Hovold" <johan+linaro@...nel.org>,
Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
<linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
<freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 05/12] drm/msm/dp: Stop using DP id as index in desc
On 12/7/2022 2:00 PM, Bjorn Andersson wrote:
> From: Bjorn Andersson <bjorn.andersson@...aro.org>
>
> In the SC8280XP platform there are two identical MDSS instances, each
> with the same set of DisplayPort instances, at different addresses.
>
> By not relying on the index to define the instance id it's possible to
> describe them both in the same table and hence have a single compatible.
>
> While at it, flatten the cfg/desc structure so that the match data is
> just an array of descs.
>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> ---
>
> Changes since v4:
> - None
>
> drivers/gpu/drm/msm/dp/dp_display.c | 72 ++++++++++-------------------
> 1 file changed, 25 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 7ff60e5ff325..eeb292f1ad1b 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -122,61 +122,41 @@ struct dp_display_private {
>
> struct msm_dp_desc {
> phys_addr_t io_start;
> + unsigned int id;
> unsigned int connector_type;
> bool wide_bus_en;
> };
>
> -struct msm_dp_config {
> - const struct msm_dp_desc *descs;
> - size_t num_descs;
> -};
> -
> static const struct msm_dp_desc sc7180_dp_descs[] = {
> - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> -};
> -
> -static const struct msm_dp_config sc7180_dp_cfg = {
> - .descs = sc7180_dp_descs,
> - .num_descs = ARRAY_SIZE(sc7180_dp_descs),
> + { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> + {}
> };
>
> static const struct msm_dp_desc sc7280_dp_descs[] = {
> - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
> - [MSM_DP_CONTROLLER_1] = { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
> -};
> -
> -static const struct msm_dp_config sc7280_dp_cfg = {
> - .descs = sc7280_dp_descs,
> - .num_descs = ARRAY_SIZE(sc7280_dp_descs),
> + { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
> + { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
> + {}
> };
>
> static const struct msm_dp_desc sc8180x_dp_descs[] = {
> - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> - [MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> - [MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP },
> -};
> -
> -static const struct msm_dp_config sc8180x_dp_cfg = {
> - .descs = sc8180x_dp_descs,
> - .num_descs = ARRAY_SIZE(sc8180x_dp_descs),
> + { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> + { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> + { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP },
> + {}
> };
>
> static const struct msm_dp_desc sm8350_dp_descs[] = {
> - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> -};
> -
> -static const struct msm_dp_config sm8350_dp_cfg = {
> - .descs = sm8350_dp_descs,
> - .num_descs = ARRAY_SIZE(sm8350_dp_descs),
> + { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> + {}
> };
>
> static const struct of_device_id dp_dt_match[] = {
> - { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg },
> - { .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_cfg },
> - { .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_cfg },
> - { .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_cfg },
> - { .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_cfg },
> - { .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_cfg },
> + { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_descs },
> + { .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_descs },
> + { .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_descs },
> + { .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_descs },
> + { .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_descs },
> + { .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_descs },
> {}
> };
>
> @@ -1262,10 +1242,9 @@ int dp_display_request_irq(struct msm_dp *dp_display)
> return 0;
> }
>
> -static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev,
> - unsigned int *id)
> +static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
> {
> - const struct msm_dp_config *cfg = of_device_get_match_data(&pdev->dev);
> + const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
> struct resource *res;
> int i;
>
> @@ -1273,11 +1252,9 @@ static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pde
> if (!res)
> return NULL;
>
> - for (i = 0; i < cfg->num_descs; i++) {
> - if (cfg->descs[i].io_start == res->start) {
> - *id = i;
> - return &cfg->descs[i];
> - }
> + for (i = 0; i < descs[i].io_start; i++) {
> + if (descs[i].io_start == res->start)
> + return &descs[i];
> }
>
> dev_err(&pdev->dev, "unknown displayport instance\n");
> @@ -1299,12 +1276,13 @@ static int dp_display_probe(struct platform_device *pdev)
> if (!dp)
> return -ENOMEM;
>
> - desc = dp_display_get_desc(pdev, &dp->id);
> + desc = dp_display_get_desc(pdev);
> if (!desc)
> return -EINVAL;
>
> dp->pdev = pdev;
> dp->name = "drm_dp";
> + dp->id = desc->id;
> dp->dp_display.connector_type = desc->connector_type;
> dp->wide_bus_en = desc->wide_bus_en;
> dp->dp_display.is_edp =
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