This patch adds dt support to hdmiphy config settings as it is board specific and depends on the signal pattern of board. Signed-off-by: Shirish S <s.shirish@xxxxxxxxxxx> --- .../devicetree/bindings/video/exynos_hdmi.txt | 32 +++++++++ drivers/gpu/drm/exynos/exynos_hdmi.c | 76 ++++++++++++++++++-- 2 files changed, 104 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/video/exynos_hdmi.txt b/Documentation/devicetree/bindings/video/exynos_hdmi.txt index 323983b..c3b546a 100644 --- a/Documentation/devicetree/bindings/video/exynos_hdmi.txt +++ b/Documentation/devicetree/bindings/video/exynos_hdmi.txt @@ -13,6 +13,30 @@ Required properties: b) pin number within the gpio controller. c) optional flags and pull up/down. +- hdmiphy-configs: following information about the hdmiphy config settings. + a) "nr-configs" specifies the number of pixel clocks supported. + b) "config<N>: config<N>" specifies the phy configuration settings, + wher 'N' denotes the number of iteration. + "pixel-clock" specifies the pixel clock + "conifig-de-emphasis-level" specifies the 8 bit configuration + of Data De-emphasis levels,below shown is example for + data de-emphasis register at address 0x145D0040. + 0x145D0040 [3:0] permitted values: + 0000 means 760 mVdiff && 1111 means 1400 mVdiff + 0x145D0040 [7:4] permitted values: + 0000 0dB + 0001 -0.25dB + 0010 -0.7dB + 0011 -1.15dB + 1111 -7.45dB + "config-clock-level" specifies the 8 bit configuration for + the corresponding clock level, for example if 0x145D005C + is the address of clock level register. + 0x145D005C [1:0] permitted values: + 00 means 0 mVdiff && 11 means 60 mVdiff + 0x145D005C [7:3] permitted values: + 00000 is 790 mVdiff + 11111 is 1430 mVdiff Example: hdmi { @@ -20,4 +44,12 @@ Example: reg = <0x14530000 0x100000>; interrupts = <0 95 0>; hpd-gpio = <&gpx3 7 1>; + hdmiphy-configs { + nr-configs = <1>; + config0: config0 { + pixel-clock = <25200000>; + config-de-emphasis-level = /bits/ 8 <0x26>; + config-clock-level = /bits/ 8 < 0x66>; + }; + } }; diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index a0e10ae..7b94a5d 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -200,6 +200,9 @@ struct hdmi_context { struct hdmi_resources res; + struct hdmiphy_config *confs; + int nr_confs; + int hpd_gpio; enum hdmi_type type; @@ -259,7 +262,7 @@ static const struct hdmiphy_config hdmiphy_v13_configs[] = { }, }; -static const struct hdmiphy_config hdmiphy_v14_configs[] = { +static struct hdmiphy_config hdmiphy_v14_configs[] = { { .pixel_clock = 25200000, .conf = { @@ -778,8 +781,8 @@ static int hdmi_find_phy_conf(struct hdmi_context *hdata, u32 pixel_clock) confs = hdmiphy_v13_configs; count = ARRAY_SIZE(hdmiphy_v13_configs); } else if (hdata->type == HDMI_TYPE14) { - confs = hdmiphy_v14_configs; - count = ARRAY_SIZE(hdmiphy_v14_configs); + confs = hdata->confs; + count = hdata->nr_confs; } else return -EINVAL; @@ -1366,7 +1369,7 @@ static void hdmiphy_conf_apply(struct hdmi_context *hdata) if (hdata->type == HDMI_TYPE13) hdmiphy_data = hdmiphy_v13_configs[i].conf; else - hdmiphy_data = hdmiphy_v14_configs[i].conf; + hdmiphy_data = hdata->confs[i].conf; memcpy(buffer, hdmiphy_data, 32); ret = i2c_master_send(hdata->hdmiphy_port, buffer, 32); @@ -1858,6 +1861,62 @@ void hdmi_attach_hdmiphy_client(struct i2c_client *hdmiphy) hdmi_hdmiphy = hdmiphy; } +static int drm_hdmi_dt_parse_phy_conf(struct platform_device *pdev, + struct hdmi_context *hdata) +{ + struct device *dev = &pdev->dev; + struct device_node *dev_np = dev->of_node; + struct device_node *phy_conf, *cfg_np; + int i = 0; + + /* Initialize with default config */ + hdata->confs = hdmiphy_v14_configs; + + phy_conf = of_find_node_by_name(dev_np, "hdmiphy-configs"); + if (phy_conf == NULL) { + DRM_ERROR("Did not find hdmiphy-configs node\n"); + return -ENODEV; + } + + if (of_property_read_u32(phy_conf, "nr-configs", &hdata->nr_confs)) { + DRM_ERROR("Failed to get the number of configurations"); + return -EINVAL; + } + + if (hdata->nr_confs < ARRAY_SIZE(hdmiphy_v14_configs)) { + DRM_ERROR("mismatch in the number of configs\n"); + return -EINVAL; + } + + for_each_child_of_node(phy_conf, cfg_np) { + if (!of_find_property(cfg_np, "pixel-clock", NULL)) + continue; + + if (of_property_read_u32_array(cfg_np, "pixel-clock", + &hdata->confs[i].pixel_clock, 1)) { + DRM_ERROR("Failed to get pixel clock\n"); + return -EINVAL; + } + + /* Overwrite the data de-emphasis and data level */ + if (of_property_read_u8_array(cfg_np, + "config-de-emphasis-level", + &hdata->confs[i].conf[16], 1)) { + DRM_ERROR("Failed to get conf\n"); + return -EINVAL; + } + /* Overwrite the clock level diff */ + if (of_property_read_u8_array(cfg_np, "config-clock-level", + &hdata->confs[i].conf[23], 1)) { + DRM_ERROR("Failed to get conf\n"); + return -EINVAL; + } + i++; + } + return 0; + +} + static struct s5p_hdmi_platform_data *drm_hdmi_dt_parse_pdata (struct device *dev) { @@ -1986,6 +2045,15 @@ static int hdmi_probe(struct platform_device *pdev) goto err_hdmiphy; } + /* get hdmiphy confs */ + if (hdata->type == HDMI_TYPE14) { + ret = drm_hdmi_dt_parse_phy_conf(pdev, hdata); + if (ret) { + DRM_ERROR("failed to get user defined config,will use + default configs, eye diagram tests may fail\n"); + } + } + /* Attach HDMI Driver to common hdmi. */ exynos_hdmi_drv_attach(drm_hdmi_ctx); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html