From fb83be8873909ba7c089d1c5cb72873cc2cce7d1 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 11 Sep 2017 14:29:52 +0200 Subject: [PATCH] drm/tegra: hdmi: Add cec-notifier support In order to support CEC the HDMI driver has to inform the CEC driver whenever the physical address changes. So when the EDID is read the CEC driver has to be informed and whenever the hotplug detect goes away. This is done through the cec-notifier framework. The link between the HDMI driver and the CEC driver is done through the hdmi-phandle property in the tegra-cec node in the device tree. Signed-off-by: Hans Verkuil Signed-off-by: Thierry Reding --- drivers/gpu/drm/tegra/Kconfig | 1 + drivers/gpu/drm/tegra/drm.h | 3 +++ drivers/gpu/drm/tegra/hdmi.c | 9 +++++++++ drivers/gpu/drm/tegra/output.c | 6 ++++++ 4 files changed, 19 insertions(+) diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig index dc58ab140151..cf54847a8bd1 100644 --- a/drivers/gpu/drm/tegra/Kconfig +++ b/drivers/gpu/drm/tegra/Kconfig @@ -9,6 +9,7 @@ config DRM_TEGRA select DRM_PANEL select TEGRA_HOST1X select IOMMU_IOVA if IOMMU_SUPPORT + select CEC_CORE if CEC_NOTIFIER help Choose this option if you have an NVIDIA Tegra SoC. diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h index 9bb6e8ebe40c..ddae331ad8b6 100644 --- a/drivers/gpu/drm/tegra/drm.h +++ b/drivers/gpu/drm/tegra/drm.h @@ -119,6 +119,8 @@ void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *iova); void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt, dma_addr_t iova); +struct cec_notifier; + struct tegra_output { struct device_node *of_node; struct device *dev; @@ -126,6 +128,7 @@ struct tegra_output { struct drm_panel *panel; struct i2c_adapter *ddc; const struct edid *edid; + struct cec_notifier *notifier; unsigned int hpd_irq; int hpd_gpio; enum of_gpio_flags hpd_gpio_flags; diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c index a4e9c769fc7a..6434b3d3d1ba 100644 --- a/drivers/gpu/drm/tegra/hdmi.c +++ b/drivers/gpu/drm/tegra/hdmi.c @@ -22,6 +22,8 @@ #include +#include + #include "hdmi.h" #include "drm.h" #include "dc.h" @@ -1721,6 +1723,10 @@ static int tegra_hdmi_probe(struct platform_device *pdev) return PTR_ERR(hdmi->vdd); } + hdmi->output.notifier = cec_notifier_get(&pdev->dev); + if (hdmi->output.notifier == NULL) + return -ENOMEM; + hdmi->output.dev = &pdev->dev; err = tegra_output_probe(&hdmi->output); @@ -1779,6 +1785,9 @@ static int tegra_hdmi_remove(struct platform_device *pdev) tegra_output_remove(&hdmi->output); + if (hdmi->output.notifier) + cec_notifier_put(hdmi->output.notifier); + return 0; } diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c index 595d1ec3e02e..1cfbacea8113 100644 --- a/drivers/gpu/drm/tegra/output.c +++ b/drivers/gpu/drm/tegra/output.c @@ -11,6 +11,8 @@ #include #include "drm.h" +#include + int tegra_output_connector_get_modes(struct drm_connector *connector) { struct tegra_output *output = connector_to_output(connector); @@ -32,6 +34,7 @@ int tegra_output_connector_get_modes(struct drm_connector *connector) else if (output->ddc) edid = drm_get_edid(connector, output->ddc); + cec_notifier_set_phys_addr_from_edid(output->notifier, edid); drm_mode_connector_update_edid_property(connector, edid); if (edid) { @@ -68,6 +71,9 @@ tegra_output_connector_detect(struct drm_connector *connector, bool force) status = connector_status_connected; } + if (status != connector_status_connected) + cec_notifier_phys_addr_invalidate(output->notifier); + return status; }