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Message-Id: <20220919-v4-4-687f09a06dd9@baylibre.com>
Date: Mon, 29 May 2023 16:31:01 +0200
From: Guillaume Ranquet <granquet@...libre.com>
To: Chunfeng Yun <chunfeng.yun@...iatek.com>,
Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, CK Hu <ck.hu@...iatek.com>,
Jitao shi <jitao.shi@...iatek.com>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>, mac.shen@...iatek.com,
stuart.lee@...iatek.com, Guillaume Ranquet <granquet@...libre.com>
Subject: [PATCH v4 4/8] drm/mediatek: hdmi: make the cec dev optional
Make cec device optional in order to support newer versions of the
hdmi IP which doesn't require it
Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
---
drivers/gpu/drm/mediatek/mtk_hdmi.c | 8 +++--
drivers/gpu/drm/mediatek/mtk_hdmi_common.c | 52 +++++++++++++++++++-----------
2 files changed, 39 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 41a7593887fb..4c382aeb94c9 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -925,10 +925,11 @@ void mtk_hdmi_clk_disable_audio_mt8183(struct mtk_hdmi *hdmi)
static enum drm_connector_status
mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi)
{
- bool connected;
+ bool connected = true;
mutex_lock(&hdmi->update_plugged_status_lock);
- connected = mtk_cec_hpd_high(hdmi->cec_dev);
+ if (hdmi->cec_dev)
+ connected = mtk_cec_hpd_high(hdmi->cec_dev);
if (hdmi->plugged_cb && hdmi->codec_dev)
hdmi->plugged_cb(hdmi->codec_dev, connected);
mutex_unlock(&hdmi->update_plugged_status_lock);
@@ -1024,7 +1025,8 @@ static int mtk_hdmi_bridge_attach(struct drm_bridge *bridge,
return ret;
}
- mtk_cec_set_hpd_event(hdmi->cec_dev, mtk_hdmi_hpd_event, hdmi->dev);
+ if (hdmi->cec_dev)
+ mtk_cec_set_hpd_event(hdmi->cec_dev, mtk_hdmi_hpd_event, hdmi->dev);
return 0;
}
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_common.c b/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
index ead0c30f55b7..d7f3d29138d8 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
@@ -110,28 +110,18 @@ void mtk_hdmi_send_infoframe(struct mtk_hdmi *hdmi, u8 *buffer_spd, size_t bufsz
mtk_hdmi_setup_spd_infoframe(hdmi, buffer_spd, bufsz_spd, "mediatek", "On-chip HDMI");
}
-int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, struct platform_device *pdev,
- const char *const *clk_names, size_t num_clocks)
+static int mtk_hdmi_get_cec_dev(struct mtk_hdmi *hdmi, struct device *dev, struct device_node *np)
{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct device_node *cec_np, *remote, *i2c_np;
+ int ret;
+ struct device_node *cec_np;
struct platform_device *cec_pdev;
struct regmap *regmap;
- struct resource *mem;
- int ret;
-
- ret = mtk_hdmi_get_all_clk(hdmi, np, clk_names, num_clocks);
- if (ret) {
- dev_err(dev, "Failed to get all clks\n");
- return ret;
- }
/* The CEC module handles HDMI hotplug detection */
cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
if (!cec_np) {
dev_err(dev, "Failed to find CEC node\n");
- return -EINVAL;
+ return -ENOTSUPP;
}
cec_pdev = of_find_device_by_node(cec_np);
@@ -141,7 +131,6 @@ int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, struct platform_device *pdev,
return -EPROBE_DEFER;
}
of_node_put(cec_np);
- hdmi->cec_dev = &cec_pdev->dev;
/*
* The mediatek,syscon-hdmi property contains a phandle link to the
* MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
@@ -150,12 +139,39 @@ int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, struct platform_device *pdev,
regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1, &hdmi->sys_offset);
if (IS_ERR(regmap))
- ret = PTR_ERR(regmap);
+ return PTR_ERR(regmap);
if (ret) {
- dev_err(dev, "Failed to get system configuration registers: %d\n", ret);
- goto put_device;
+ dev_err(dev,
+ "Failed to get system configuration registers: %d\n", ret);
+ return ret;
}
+
hdmi->sys_regmap = regmap;
+ hdmi->cec_dev = &cec_pdev->dev;
+
+ return 0;
+}
+
+int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, struct platform_device *pdev,
+ const char *const *clk_names, size_t num_clocks)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *remote, *i2c_np;
+ struct resource *mem;
+ int ret;
+
+ ret = mtk_hdmi_get_all_clk(hdmi, np, clk_names, num_clocks);
+ if (ret) {
+ dev_err(dev, "Failed to get all clks\n");
+ return ret;
+ }
+
+ ret = mtk_hdmi_get_cec_dev(hdmi, dev, np);
+ if (ret == -ENOTSUPP)
+ dev_info(dev, "No CEC node found, continuing without");
+ else if(ret)
+ goto put_device;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
--
2.40.0
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