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SubjectRe: [PATCH v2 2/5] drm/i915: hdmi: add CEC notifier to intel_hdmi
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Hi Ville,

On 18/05/2018 15:24, Ville Syrjälä wrote:
> On Fri, May 18, 2018 at 03:05:01PM +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@baylibre.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>";
>> + }
>> +}
>
> I don't think we need this in the header. A static function will do.

I just followed how other functions were declared, in the same way.

> And I was actually thinking something a bit fancier like:
> snprintf("%s/port-%s", dev_name(dev), port_id(port));
>
> Oh, I see you already pass the device in so I guess we don't need
> that in the port id?

Indeed, my bad I forgot to answer your last question, we already pass a struct
device which provides the device bus, name and id, so it's unneeded here.

>
>> +
>> 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;
>
> I was wondering if we need any ifdefs around this stuff, but I guess not
> since it's just a pointer and all the functions seem to have empty
> static inlines for the CEC=n case.
>
>> };
>>
>> 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
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>

Thans,
Neil

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