On 05/15/2018 04:42 PM, Neil Armstrong wrote:
> This patchs adds the cec_notifier feature to the intel_hdmi part
> of the i915 DRM driver. It uses the HDMI DRM connector name to differentiate
> between each HDMI ports.
> The changes will allow the i915 HDMI code to notify EDID and HPD changes
> to an eventual CEC adapter.
>
> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Reviewed-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Thanks!
Hans
> ---
> drivers/gpu/drm/i915/Kconfig | 1 +
> drivers/gpu/drm/i915/intel_drv.h | 2 ++
> drivers/gpu/drm/i915/intel_hdmi.c | 12 ++++++++++++
> 3 files changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
> index dfd9588..2d65d56 100644
> --- a/drivers/gpu/drm/i915/Kconfig
> +++ b/drivers/gpu/drm/i915/Kconfig
> @@ -23,6 +23,7 @@ config DRM_I915
> select SYNC_FILE
> select IOSF_MBI
> select CRC32
> + select CEC_CORE if CEC_NOTIFIER
> help
> Choose this option if you have a system that has "Intel Graphics
> Media Accelerator" or "HD Graphics" integrated graphics,
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index d436858..b50e51b 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -39,6 +39,7 @@
> #include <drm/drm_dp_mst_helper.h>
> #include <drm/drm_rect.h>
> #include <drm/drm_atomic.h>
> +#include <media/cec-notifier.h>
>
> /**
> * __wait_for - magic wait macro
> @@ -1001,6 +1002,7 @@ struct intel_hdmi {
> bool has_audio;
> bool rgb_quant_range_selectable;
> struct intel_connector *attached_connector;
> + struct cec_notifier *notifier;
> };
>
> struct intel_dp_mst_encoder;
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 1baef4a..e98103d 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1868,6 +1868,8 @@ intel_hdmi_set_edid(struct drm_connector *connector)
> connected = true;
> }
>
> + cec_notifier_set_phys_addr_from_edid(intel_hdmi->notifier, edid);
> +
> return connected;
> }
>
> @@ -1876,6 +1878,7 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
> {
> enum drm_connector_status status;
> struct drm_i915_private *dev_priv = to_i915(connector->dev);
> + struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
>
> DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> connector->base.id, connector->name);
> @@ -1891,6 +1894,9 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
>
> intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
>
> + if (status != connector_status_connected)
> + cec_notifier_phys_addr_invalidate(intel_hdmi->notifier);
> +
> return status;
> }
>
> @@ -2031,6 +2037,8 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
>
> static void intel_hdmi_destroy(struct drm_connector *connector)
> {
> + if (intel_attached_hdmi(connector)->notifier)
> + cec_notifier_put(intel_attached_hdmi(connector)->notifier);
> kfree(to_intel_connector(connector)->detect_edid);
> drm_connector_cleanup(connector);
> kfree(connector);
> @@ -2358,6 +2366,10 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> u32 temp = I915_READ(PEG_BAND_GAP_DATA);
> I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
> }
> +
> + intel_hdmi->notifier = cec_notifier_get_conn(dev->dev, connector->name);
> + if (!intel_hdmi->notifier)
> + DRM_DEBUG_KMS("CEC notifier get failed\n");
> }
>
> void intel_hdmi_init(struct drm_i915_private *dev_priv,
>
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