diff options
| -rw-r--r-- | drivers/gpu/drm/bridge/dw-hdmi.c | 25 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/dw-hdmi.h | 8 |
2 files changed, 27 insertions, 6 deletions
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c index 06c252f560ad..1809247745b8 100644 --- a/drivers/gpu/drm/bridge/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/dw-hdmi.c @@ -1832,6 +1832,9 @@ __dw_hdmi_probe(struct platform_device *pdev, int irq; int ret; u32 val = 1; + u16 version; + u8 prod_id0; + u8 prod_id1; u8 config0; u8 config1; @@ -1914,12 +1917,22 @@ __dw_hdmi_probe(struct platform_device *pdev, } /* Product and revision IDs */ - dev_info(dev, - "Detected HDMI controller 0x%x:0x%x:0x%x:0x%x\n", - hdmi_readb(hdmi, HDMI_DESIGN_ID), - hdmi_readb(hdmi, HDMI_REVISION_ID), - hdmi_readb(hdmi, HDMI_PRODUCT_ID0), - hdmi_readb(hdmi, HDMI_PRODUCT_ID1)); + version = (hdmi_readb(hdmi, HDMI_DESIGN_ID) << 8) + | (hdmi_readb(hdmi, HDMI_REVISION_ID) << 0); + prod_id0 = hdmi_readb(hdmi, HDMI_PRODUCT_ID0); + prod_id1 = hdmi_readb(hdmi, HDMI_PRODUCT_ID1); + + if (prod_id0 != HDMI_PRODUCT_ID0_HDMI_TX || + (prod_id1 & ~HDMI_PRODUCT_ID1_HDCP) != HDMI_PRODUCT_ID1_HDMI_TX) { + dev_err(dev, "Unsupported HDMI controller (%04x:%02x:%02x)\n", + version, prod_id0, prod_id1); + ret = -ENODEV; + goto err_iahb; + } + + dev_info(dev, "Detected HDMI TX controller v%x.%03x %s HDCP\n", + version >> 12, version & 0xfff, + prod_id1 & HDMI_PRODUCT_ID1_HDCP ? "with" : "without"); initialize_hdmi_ih_mutes(hdmi); diff --git a/drivers/gpu/drm/bridge/dw-hdmi.h b/drivers/gpu/drm/bridge/dw-hdmi.h index 08235aef2fa3..91d7fabbd6e5 100644 --- a/drivers/gpu/drm/bridge/dw-hdmi.h +++ b/drivers/gpu/drm/bridge/dw-hdmi.h @@ -545,6 +545,14 @@ #define HDMI_I2CM_FS_SCL_LCNT_0_ADDR 0x7E12 enum { +/* PRODUCT_ID0 field values */ + HDMI_PRODUCT_ID0_HDMI_TX = 0xa0, + +/* PRODUCT_ID1 field values */ + HDMI_PRODUCT_ID1_HDCP = 0xc0, + HDMI_PRODUCT_ID1_HDMI_RX = 0x02, + HDMI_PRODUCT_ID1_HDMI_TX = 0x01, + /* CONFIG0_ID field values */ HDMI_CONFIG0_I2S = 0x10, |