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Message-ID: <20180530152936.GQ23723@intel.com>
Date: Wed, 30 May 2018 18:29:36 +0300
From: Ville Syrjälä <ville.syrjala@...ux.intel.com>
To: Neil Armstrong <narmstrong@...libre.com>
Cc: airlied@...ux.ie, hans.verkuil@...co.com, lee.jones@...aro.org,
olof@...om.net, seanpaul@...gle.com, sadolfsson@...gle.com,
intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org, fparent@...libre.com,
felixe@...gle.com, bleung@...gle.com, darekm@...gle.com,
linux-media@...r.kernel.org
Subject: Re: [Intel-gfx] [PATCH v6 2/6] drm/i915: hdmi: add CEC notifier to
intel_hdmi
On Thu, May 24, 2018 at 11:57:17AM +0200, 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@...libre.com>
> Reviewed-by: Hans Verkuil <hans.verkuil@...co.com>
> ---
> drivers/gpu/drm/i915/Kconfig | 1 +
> drivers/gpu/drm/i915/intel_display.h | 20 ++++++++++++++++++++
> drivers/gpu/drm/i915/intel_drv.h | 2 ++
> drivers/gpu/drm/i915/intel_hdmi.c | 13 +++++++++++++
> 4 files changed, 36 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_display.h b/drivers/gpu/drm/i915/intel_display.h
> index 4e7418b..c68d1c8 100644
> --- a/drivers/gpu/drm/i915/intel_display.h
> +++ b/drivers/gpu/drm/i915/intel_display.h
> @@ -126,6 +126,26 @@ enum port {
>
> #define port_name(p) ((p) + 'A')
>
> +static inline const char *port_identifier(enum port port)
> +{
> + switch (port) {
> + case PORT_A:
> + return "Port A";
> + case PORT_B:
> + return "Port B";
> + case PORT_C:
> + return "Port C";
> + case PORT_D:
> + return "Port D";
> + case PORT_E:
> + return "Port E";
> + case PORT_F:
> + return "Port F";
> + default:
> + return "<invalid>";
> + }
> +}
Could use a comment to make it clear that this identifier is
expected to remain stable since it's referenced from other drivers.
> +
> enum dpio_channel {
> DPIO_CH0,
> DPIO_CH1
> 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;
"notifier" seems a bit too generic a name. "cec_notifier" would be
better.
Apart from that this seems OK to me
Reviewed-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> };
>
> 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..d522b5b 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 +2366,11 @@ 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,
> + port_identifier(port));
> + if (!intel_hdmi->notifier)
> + DRM_DEBUG_KMS("CEC notifier get failed\n");
> }
>
> void intel_hdmi_init(struct drm_i915_private *dev_priv,
> --
> 2.7.4
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel
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