[PATCH v2 00/39] drm/bridge: switch to struct drm_edid

[PATCH v2 00/39] drm/bridge: switch to struct drm_edid

[Jani Nikula]

Convert all of drm/bridge to the new struct drm_edid
infrastructure. It's safer than struct edid, because it contains meta
information about the allocated size of the EDID, instead of relying on
the size (number of extensions) originating from outside of the kernel.

Among all of drm, I think bridge has the most uses of struct edid that
do not originate from the drm_get_edid() family of functions, which
means the validity checks are somewhat inconsistent, and having the meta
information is more crucial.

Only build tested. I'm sure there should be more Cc's especially in the
patches towards the end of the series, but I just wanted to get the
series out the door now.

BR,
Jani.

Jani Nikula (39):
  drm/bridge: add ->edid_read hook and drm_bridge_edid_read()
  drm/bridge: switch to drm_bridge_read_edid()
  drm/bridge: chrontel-ch7033: switch to drm_bridge_read_edid()
  drm/bridge: lt8912b: use drm_bridge_read_edid()
  drm/bridge: lt8912b: clear the EDID property on failures
  drm/bridge: lt8912b: use ->edid_read callback
  drm/bridge: lt9611uxc: use drm_bridge_read_edid()
  drm: bridge: simple-bridge: use drm_bridge_edid_read()
  drm: bridge: simple-bridge: clear the EDID property on failures
  drm/bridge: tfp410: use drm_bridge_edid_read()
  drm/bridge: tfp410: clear the EDID property on failures
  drm/meson: switch to drm_bridge_edid_read()
  drm/bridge: remove drm_bridge_get_edid() in favour of
    drm_bridge_edid_read()
  drm/bridge: anx7625: switch to ->edid_read callback
  drm/bridge: cdns-mhdp8546: switch to ->edid_read callback
  drm/bridge: cdns-mhdp8546: clear the EDID property on failures
  drm/bridge: display-connector: switch to ->edid_read callback
  drm/bridge: it6505: switch to ->edid_read callback
  drm: bridge: it66121: switch to ->edid_read callback
  drm/bridge: lt9611: switch to ->edid_read callback
  drm/bridge: lt9611uxc: switch to ->edid_read callback
  drm/bridge: megachips: switch to ->edid_read callback
  drm/bridge: nxp-ptn3460: switch to ->edid_read callback
  drm/bridge: sii902x: use display info is_hdmi
  drm/bridge: sii902x: switch to ->edid_read callback
  drm/mediatek/dp: switch to ->edid_read callback
  drm/mediatek/hdmi: switch to ->edid_read callback
  drm/msm/hdmi: fix indent
  drm/msm/hdmi: switch to ->edid_read callback
  drm/omap/hdmi4: switch to ->edid_read callback
  drm/omap/hdmi5: switch to ->edid_read callback
  drm: xlnx: zynqmp_dpsub: switch to ->edid_read callback
  drm: adv7511: switch to ->edid_read callback
  drm: bridge: dw_hdmi: switch to ->edid_read callback
  drm: bridge: dw_hdmi: clear the EDID property and CEC address on
    failures
  drm/bridge: tc358767: update the EDID property
  drm/bridge: tc358767: switch to ->edid_read callback
  drm/bridge: ti-sn65dsi86: switch to ->edid_read callback
  drm/bridge: remove ->get_edid callback

 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c  | 47 ++++++++++++-------
 drivers/gpu/drm/bridge/analogix/anx7625.c     | 30 ++++--------
 .../drm/bridge/cadence/cdns-mhdp8546-core.c   | 28 ++++++-----
 drivers/gpu/drm/bridge/chrontel-ch7033.c      | 12 ++---
 drivers/gpu/drm/bridge/display-connector.c    |  8 ++--
 drivers/gpu/drm/bridge/ite-it6505.c           | 17 +++----
 drivers/gpu/drm/bridge/ite-it66121.c          | 16 +++----
 drivers/gpu/drm/bridge/lontium-lt8912b.c      | 20 ++++----
 drivers/gpu/drm/bridge/lontium-lt9611.c       |  8 ++--
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c    | 18 +++----
 .../bridge/megachips-stdpxxxx-ge-b850v3-fw.c  | 18 +++----
 drivers/gpu/drm/bridge/nxp-ptn3460.c          | 23 +++++----
 drivers/gpu/drm/bridge/sii902x.c              | 38 +++++++--------
 drivers/gpu/drm/bridge/simple-bridge.c        | 17 +++----
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c     | 43 ++++++++++-------
 drivers/gpu/drm/bridge/tc358767.c             | 17 +++----
 drivers/gpu/drm/bridge/ti-sn65dsi86.c         |  8 ++--
 drivers/gpu/drm/bridge/ti-tfp410.c            | 18 +++----
 drivers/gpu/drm/drm_bridge.c                  | 17 +++----
 drivers/gpu/drm/drm_bridge_connector.c        | 16 +++----
 drivers/gpu/drm/mediatek/mtk_dp.c             | 31 +++++++-----
 drivers/gpu/drm/mediatek/mtk_hdmi.c           | 26 ++++++----
 drivers/gpu/drm/meson/meson_encoder_hdmi.c    | 20 ++++++--
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c        | 33 ++++++++-----
 drivers/gpu/drm/omapdrm/dss/hdmi4.c           | 22 ++++++---
 drivers/gpu/drm/omapdrm/dss/hdmi5.c           | 12 ++---
 drivers/gpu/drm/xlnx/zynqmp_dp.c              |  8 ++--
 include/drm/drm_bridge.h                      | 25 +++++-----
 28 files changed, 329 insertions(+), 267 deletions(-)

-- 
2.39.2

[PATCH v2 01/39] drm/bridge: add ->edid_read hook and drm_bridge_edid_read()

[Jani Nikula]

Add new struct drm_edid based ->edid_read hook and
drm_bridge_edid_read() function to call the hook.

v2: Include drm/drm_edid.h

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_bridge.c | 46 +++++++++++++++++++++++++++++++++++-
 include/drm/drm_bridge.h     | 33 ++++++++++++++++++++++++++
 2 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index cee3188adf3d..4f6f8c662d3f 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -27,8 +27,9 @@
 #include <linux/mutex.h>
 
 #include <drm/drm_atomic_state_helper.h>
-#include <drm/drm_debugfs.h>
 #include <drm/drm_bridge.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_edid.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_file.h>
 #include <drm/drm_of.h>
@@ -1206,6 +1207,47 @@ int drm_bridge_get_modes(struct drm_bridge *bridge,
 }
 EXPORT_SYMBOL_GPL(drm_bridge_get_modes);
 
+/**
+ * drm_bridge_edid_read - read the EDID data of the connected display
+ * @bridge: bridge control structure
+ * @connector: the connector to read EDID for
+ *
+ * If the bridge supports output EDID retrieval, as reported by the
+ * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.edid_read to get
+ * the EDID and return it. Otherwise return NULL.
+ *
+ * If &drm_bridge_funcs.edid_read is not set, fall back to using
+ * drm_bridge_get_edid() and wrapping it in struct drm_edid.
+ *
+ * RETURNS:
+ * The retrieved EDID on success, or NULL otherwise.
+ */
+const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
+					    struct drm_connector *connector)
+{
+	if (!(bridge->ops & DRM_BRIDGE_OP_EDID))
+		return NULL;
+
+	/* Transitional: Fall back to ->get_edid. */
+	if (!bridge->funcs->edid_read) {
+		const struct drm_edid *drm_edid;
+		struct edid *edid;
+
+		edid = drm_bridge_get_edid(bridge, connector);
+		if (!edid)
+			return NULL;
+
+		drm_edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH);
+
+		kfree(edid);
+
+		return drm_edid;
+	}
+
+	return bridge->funcs->edid_read(bridge, connector);
+}
+EXPORT_SYMBOL_GPL(drm_bridge_edid_read);
+
 /**
  * drm_bridge_get_edid - get the EDID data of the connected display
  * @bridge: bridge control structure
@@ -1215,6 +1257,8 @@ EXPORT_SYMBOL_GPL(drm_bridge_get_modes);
  * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.get_edid to
  * get the EDID and return it. Otherwise return NULL.
  *
+ * Deprecated. Prefer using drm_bridge_edid_read().
+ *
  * RETURNS:
  * The retrieved EDID on success, or NULL otherwise.
  */
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index e39da5807ba7..b7aed3ead705 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -557,6 +557,37 @@ struct drm_bridge_funcs {
 	int (*get_modes)(struct drm_bridge *bridge,
 			 struct drm_connector *connector);
 
+	/**
+	 * @edid_read:
+	 *
+	 * Read the EDID data of the connected display.
+	 *
+	 * The @edid_read callback is the preferred way of reporting mode
+	 * information for a display connected to the bridge output. Bridges
+	 * that support reading EDID shall implement this callback and leave
+	 * the @get_modes callback unimplemented.
+	 *
+	 * The caller of this operation shall first verify the output
+	 * connection status and refrain from reading EDID from a disconnected
+	 * output.
+	 *
+	 * This callback is optional. Bridges that implement it shall set the
+	 * DRM_BRIDGE_OP_EDID flag in their &drm_bridge->ops.
+	 *
+	 * The connector parameter shall be used for the sole purpose of EDID
+	 * retrieval, and shall not be stored internally by bridge drivers for
+	 * future usage.
+	 *
+	 * RETURNS:
+	 *
+	 * An edid structure newly allocated with drm_edid_alloc() or returned
+	 * from drm_edid_read() family of functions on success, or NULL
+	 * otherwise. The caller is responsible for freeing the returned edid
+	 * structure with drm_edid_free().
+	 */
+	const struct drm_edid *(*edid_read)(struct drm_bridge *bridge,
+					    struct drm_connector *connector);
+
 	/**
 	 * @get_edid:
 	 *
@@ -888,6 +919,8 @@ drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
 enum drm_connector_status drm_bridge_detect(struct drm_bridge *bridge);
 int drm_bridge_get_modes(struct drm_bridge *bridge,
 			 struct drm_connector *connector);
+const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
+					    struct drm_connector *connector);
 struct edid *drm_bridge_get_edid(struct drm_bridge *bridge,
 				 struct drm_connector *connector);
 void drm_bridge_hpd_enable(struct drm_bridge *bridge,
-- 
2.39.2

[PATCH v2 02/39] drm/bridge: switch to drm_bridge_read_edid()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_bridge_connector.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
index 3acd67021ec6..982552c9f92c 100644
--- a/drivers/gpu/drm/drm_bridge_connector.c
+++ b/drivers/gpu/drm/drm_bridge_connector.c
@@ -239,27 +239,27 @@ static int drm_bridge_connector_get_modes_edid(struct drm_connector *connector,
 					       struct drm_bridge *bridge)
 {
 	enum drm_connector_status status;
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int n;
 
 	status = drm_bridge_connector_detect(connector, false);
 	if (status != connector_status_connected)
 		goto no_edid;
 
-	edid = drm_bridge_get_edid(bridge, connector);
-	if (!drm_edid_is_valid(edid)) {
-		kfree(edid);
+	drm_edid = drm_bridge_edid_read(bridge, connector);
+	if (!drm_edid_valid(drm_edid)) {
+		drm_edid_free(drm_edid);
 		goto no_edid;
 	}
 
-	drm_connector_update_edid_property(connector, edid);
-	n = drm_add_edid_modes(connector, edid);
+	drm_edid_connector_update(connector, drm_edid);
+	n = drm_edid_connector_add_modes(connector);
 
-	kfree(edid);
+	drm_edid_free(drm_edid);
 	return n;
 
 no_edid:
-	drm_connector_update_edid_property(connector, NULL);
+	drm_edid_connector_update(connector, NULL);
 	return 0;
 }
 
-- 
2.39.2

Re: [PATCH v2 02/39] drm/bridge: switch to drm_bridge_read_edid()

[Thomas Zimmermann]

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Hi Jani

 > drm/bridge: switch to drm_bridge_read_edid()

Did you mean drm_bridge_edid_read(), here and in the other patches?

(Personally, I'd prefer read_edid over edid_read. The former is common 
style and easier to read.)

Best regards
Thomas

Am 03.01.24 um 11:08 schrieb Jani Nikula:
> Prefer using the struct drm_edid based functions.
> 
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
>   drivers/gpu/drm/drm_bridge_connector.c | 16 ++++++++--------
>   1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
> index 3acd67021ec6..982552c9f92c 100644
> --- a/drivers/gpu/drm/drm_bridge_connector.c
> +++ b/drivers/gpu/drm/drm_bridge_connector.c
> @@ -239,27 +239,27 @@ static int drm_bridge_connector_get_modes_edid(struct drm_connector *connector,
>   					       struct drm_bridge *bridge)
>   {
>   	enum drm_connector_status status;
> -	struct edid *edid;
> +	const struct drm_edid *drm_edid;
>   	int n;
>   
>   	status = drm_bridge_connector_detect(connector, false);
>   	if (status != connector_status_connected)
>   		goto no_edid;
>   
> -	edid = drm_bridge_get_edid(bridge, connector);
> -	if (!drm_edid_is_valid(edid)) {
> -		kfree(edid);
> +	drm_edid = drm_bridge_edid_read(bridge, connector);
> +	if (!drm_edid_valid(drm_edid)) {
> +		drm_edid_free(drm_edid);
>   		goto no_edid;
>   	}
>   
> -	drm_connector_update_edid_property(connector, edid);
> -	n = drm_add_edid_modes(connector, edid);
> +	drm_edid_connector_update(connector, drm_edid);
> +	n = drm_edid_connector_add_modes(connector);
>   
> -	kfree(edid);
> +	drm_edid_free(drm_edid);
>   	return n;
>   
>   no_edid:
> -	drm_connector_update_edid_property(connector, NULL);
> +	drm_edid_connector_update(connector, NULL);
>   	return 0;
>   }
>   

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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Re: [PATCH v2 02/39] drm/bridge: switch to drm_bridge_read_edid()

[Jani Nikula]

On Wed, 03 Jan 2024, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Hi Jani
>
>  > drm/bridge: switch to drm_bridge_read_edid()
>
> Did you mean drm_bridge_edid_read(), here and in the other patches?

Ah, yeah, I did.

> (Personally, I'd prefer read_edid over edid_read. The former is common 
> style and easier to read.)

The name comes from drm_edid_read() family of functions, which are so
named because they reside in drm_edid.[ch].

BR,
Jani.

>
> Best regards
> Thomas
>
> Am 03.01.24 um 11:08 schrieb Jani Nikula:
>> Prefer using the struct drm_edid based functions.
>> 
>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
>> ---
>>   drivers/gpu/drm/drm_bridge_connector.c | 16 ++++++++--------
>>   1 file changed, 8 insertions(+), 8 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
>> index 3acd67021ec6..982552c9f92c 100644
>> --- a/drivers/gpu/drm/drm_bridge_connector.c
>> +++ b/drivers/gpu/drm/drm_bridge_connector.c
>> @@ -239,27 +239,27 @@ static int drm_bridge_connector_get_modes_edid(struct drm_connector *connector,
>>   					       struct drm_bridge *bridge)
>>   {
>>   	enum drm_connector_status status;
>> -	struct edid *edid;
>> +	const struct drm_edid *drm_edid;
>>   	int n;
>>   
>>   	status = drm_bridge_connector_detect(connector, false);
>>   	if (status != connector_status_connected)
>>   		goto no_edid;
>>   
>> -	edid = drm_bridge_get_edid(bridge, connector);
>> -	if (!drm_edid_is_valid(edid)) {
>> -		kfree(edid);
>> +	drm_edid = drm_bridge_edid_read(bridge, connector);
>> +	if (!drm_edid_valid(drm_edid)) {
>> +		drm_edid_free(drm_edid);
>>   		goto no_edid;
>>   	}
>>   
>> -	drm_connector_update_edid_property(connector, edid);
>> -	n = drm_add_edid_modes(connector, edid);
>> +	drm_edid_connector_update(connector, drm_edid);
>> +	n = drm_edid_connector_add_modes(connector);
>>   
>> -	kfree(edid);
>> +	drm_edid_free(drm_edid);
>>   	return n;
>>   
>>   no_edid:
>> -	drm_connector_update_edid_property(connector, NULL);
>> +	drm_edid_connector_update(connector, NULL);
>>   	return 0;
>>   }
>>   

-- 
Jani Nikula, Intel

[PATCH v2 03/39] drm/bridge: chrontel-ch7033: switch to drm_bridge_read_edid()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/chrontel-ch7033.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/chrontel-ch7033.c b/drivers/gpu/drm/bridge/chrontel-ch7033.c
index 483c28c7fc99..c83486cf6b15 100644
--- a/drivers/gpu/drm/bridge/chrontel-ch7033.c
+++ b/drivers/gpu/drm/bridge/chrontel-ch7033.c
@@ -230,14 +230,14 @@ static const struct drm_connector_funcs ch7033_connector_funcs = {
 static int ch7033_connector_get_modes(struct drm_connector *connector)
 {
 	struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
-	edid = drm_bridge_get_edid(priv->next_bridge, connector);
-	drm_connector_update_edid_property(connector, edid);
-	if (edid) {
-		ret = drm_add_edid_modes(connector, edid);
-		kfree(edid);
+	drm_edid = drm_bridge_edid_read(priv->next_bridge, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	if (drm_edid) {
+		ret = drm_edid_connector_add_modes(connector);
+		drm_edid_free(drm_edid);
 	} else {
 		ret = drm_add_modes_noedid(connector, 1920, 1080);
 		drm_set_preferred_mode(connector, 1024, 768);
-- 
2.39.2

[PATCH v2 04/39] drm/bridge: lt8912b: use drm_bridge_read_edid()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

cc: Adrien Grassein <adrien.grassein@gmail.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 273157428c82..4dc748d5d1ee 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -440,16 +440,16 @@ lt8912_connector_mode_valid(struct drm_connector *connector,
 
 static int lt8912_connector_get_modes(struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret = -1;
 	int num = 0;
 	struct lt8912 *lt = connector_to_lt8912(connector);
 	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 
-	edid = drm_bridge_get_edid(lt->hdmi_port, connector);
-	if (edid) {
-		drm_connector_update_edid_property(connector, edid);
-		num = drm_add_edid_modes(connector, edid);
+	drm_edid = drm_bridge_edid_read(lt->hdmi_port, connector);
+	if (drm_edid) {
+		drm_edid_connector_update(connector, drm_edid);
+		num = drm_edid_connector_add_modes(connector);
 	} else {
 		return ret;
 	}
@@ -459,7 +459,7 @@ static int lt8912_connector_get_modes(struct drm_connector *connector)
 	if (ret)
 		num = ret;
 
-	kfree(edid);
+	drm_edid_free(drm_edid);
 	return num;
 }
 
-- 
2.39.2

[PATCH v2 05/39] drm/bridge: lt8912b: clear the EDID property on failures

[Jani Nikula]

If EDID read fails, clear the EDID property.

Cc: Adrien Grassein <adrien.grassein@gmail.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 4dc748d5d1ee..9c0ffc1c6fac 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -447,8 +447,8 @@ static int lt8912_connector_get_modes(struct drm_connector *connector)
 	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 
 	drm_edid = drm_bridge_edid_read(lt->hdmi_port, connector);
+	drm_edid_connector_update(connector, drm_edid);
 	if (drm_edid) {
-		drm_edid_connector_update(connector, drm_edid);
 		num = drm_edid_connector_add_modes(connector);
 	} else {
 		return ret;
-- 
2.39.2

[PATCH v2 06/39] drm/bridge: lt8912b: use ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Cc: Adrien Grassein <adrien.grassein@gmail.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 9c0ffc1c6fac..e7c4bef74aa4 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -620,8 +620,8 @@ lt8912_bridge_detect(struct drm_bridge *bridge)
 	return lt8912_check_cable_status(lt);
 }
 
-static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge,
-					   struct drm_connector *connector)
+static const struct drm_edid *lt8912_bridge_edid_read(struct drm_bridge *bridge,
+						      struct drm_connector *connector)
 {
 	struct lt8912 *lt = bridge_to_lt8912(bridge);
 
@@ -630,7 +630,7 @@ static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge,
 	 * given to the hdmi connector node.
 	 */
 	if (lt->hdmi_port->ops & DRM_BRIDGE_OP_EDID)
-		return drm_bridge_get_edid(lt->hdmi_port, connector);
+		return drm_bridge_edid_read(lt->hdmi_port, connector);
 
 	dev_warn(lt->dev, "The connected bridge does not supports DRM_BRIDGE_OP_EDID\n");
 	return NULL;
@@ -642,7 +642,7 @@ static const struct drm_bridge_funcs lt8912_bridge_funcs = {
 	.mode_set = lt8912_bridge_mode_set,
 	.enable = lt8912_bridge_enable,
 	.detect = lt8912_bridge_detect,
-	.get_edid = lt8912_bridge_get_edid,
+	.edid_read = lt8912_bridge_edid_read,
 };
 
 static int lt8912_bridge_resume(struct device *dev)
-- 
2.39.2

[PATCH v2 07/39] drm/bridge: lt9611uxc: use drm_bridge_read_edid()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index e971b75e90ad..3d916306a47d 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -294,12 +294,12 @@ static int lt9611uxc_connector_get_modes(struct drm_connector *connector)
 {
 	struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
 	unsigned int count;
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 
-	edid = drm_bridge_get_edid(&lt9611uxc->bridge, connector);
-	drm_connector_update_edid_property(connector, edid);
-	count = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid = drm_bridge_edid_read(&lt9611uxc->bridge, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	count = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return count;
 }
-- 
2.39.2

[PATCH v2 08/39] drm: bridge: simple-bridge: use drm_bridge_edid_read()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/simple-bridge.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/simple-bridge.c b/drivers/gpu/drm/bridge/simple-bridge.c
index cbe8e778d7c7..e0cf7721bb8c 100644
--- a/drivers/gpu/drm/bridge/simple-bridge.c
+++ b/drivers/gpu/drm/bridge/simple-bridge.c
@@ -51,18 +51,18 @@ drm_connector_to_simple_bridge(struct drm_connector *connector)
 static int simple_bridge_get_modes(struct drm_connector *connector)
 {
 	struct simple_bridge *sbridge = drm_connector_to_simple_bridge(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
 	if (sbridge->next_bridge->ops & DRM_BRIDGE_OP_EDID) {
-		edid = drm_bridge_get_edid(sbridge->next_bridge, connector);
-		if (!edid)
+		drm_edid = drm_bridge_edid_read(sbridge->next_bridge, connector);
+		if (!drm_edid)
 			DRM_INFO("EDID read failed. Fallback to standard modes\n");
 	} else {
-		edid = NULL;
+		drm_edid = NULL;
 	}
 
-	if (!edid) {
+	if (!drm_edid) {
 		/*
 		 * In case we cannot retrieve the EDIDs (missing or broken DDC
 		 * bus from the next bridge), fallback on the XGA standards and
@@ -73,9 +73,9 @@ static int simple_bridge_get_modes(struct drm_connector *connector)
 		return ret;
 	}
 
-	drm_connector_update_edid_property(connector, edid);
-	ret = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid_connector_update(connector, drm_edid);
+	ret = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return ret;
 }
-- 
2.39.2

[PATCH v2 09/39] drm: bridge: simple-bridge: clear the EDID property on failures

[Jani Nikula]

If EDID read fails, clear the EDID property.

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/simple-bridge.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/simple-bridge.c b/drivers/gpu/drm/bridge/simple-bridge.c
index e0cf7721bb8c..5813a2c4fc5e 100644
--- a/drivers/gpu/drm/bridge/simple-bridge.c
+++ b/drivers/gpu/drm/bridge/simple-bridge.c
@@ -62,6 +62,8 @@ static int simple_bridge_get_modes(struct drm_connector *connector)
 		drm_edid = NULL;
 	}
 
+	drm_edid_connector_update(connector, drm_edid);
+
 	if (!drm_edid) {
 		/*
 		 * In case we cannot retrieve the EDIDs (missing or broken DDC
@@ -73,7 +75,6 @@ static int simple_bridge_get_modes(struct drm_connector *connector)
 		return ret;
 	}
 
-	drm_edid_connector_update(connector, drm_edid);
 	ret = drm_edid_connector_add_modes(connector);
 	drm_edid_free(drm_edid);
 
-- 
2.39.2

[PATCH v2 10/39] drm/bridge: tfp410: use drm_bridge_edid_read()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/ti-tfp410.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index 28848a8eb42e..dd14731eb03e 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -50,18 +50,18 @@ drm_connector_to_tfp410(struct drm_connector *connector)
 static int tfp410_get_modes(struct drm_connector *connector)
 {
 	struct tfp410 *dvi = drm_connector_to_tfp410(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
 	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID) {
-		edid = drm_bridge_get_edid(dvi->next_bridge, connector);
-		if (!edid)
+		drm_edid = drm_bridge_edid_read(dvi->next_bridge, connector);
+		if (!drm_edid)
 			DRM_INFO("EDID read failed. Fallback to standard modes\n");
 	} else {
-		edid = NULL;
+		drm_edid = NULL;
 	}
 
-	if (!edid) {
+	if (!drm_edid) {
 		/*
 		 * No EDID, fallback on the XGA standard modes and prefer a mode
 		 * pretty much anything can handle.
@@ -71,11 +71,11 @@ static int tfp410_get_modes(struct drm_connector *connector)
 		return ret;
 	}
 
-	drm_connector_update_edid_property(connector, edid);
+	drm_edid_connector_update(connector, drm_edid);
 
-	ret = drm_add_edid_modes(connector, edid);
+	ret = drm_edid_connector_add_modes(connector);
 
-	kfree(edid);
+	drm_edid_free(drm_edid);
 
 	return ret;
 }
-- 
2.39.2

[PATCH v2 11/39] drm/bridge: tfp410: clear the EDID property on failures

[Jani Nikula]

If EDID read fails, clear the EDID property.

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/ti-tfp410.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index dd14731eb03e..c7bef5c23927 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -61,6 +61,8 @@ static int tfp410_get_modes(struct drm_connector *connector)
 		drm_edid = NULL;
 	}
 
+	drm_edid_connector_update(connector, drm_edid);
+
 	if (!drm_edid) {
 		/*
 		 * No EDID, fallback on the XGA standard modes and prefer a mode
@@ -71,8 +73,6 @@ static int tfp410_get_modes(struct drm_connector *connector)
 		return ret;
 	}
 
-	drm_edid_connector_update(connector, drm_edid);
-
 	ret = drm_edid_connector_add_modes(connector);
 
 	drm_edid_free(drm_edid);
-- 
2.39.2

[PATCH v2 12/39] drm/meson: switch to drm_bridge_edid_read()

[Jani Nikula]

Prefer using the struct drm_edid based functions.

Not ideal, should use source physical address from connector info.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/meson/meson_encoder_hdmi.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 25ea76558690..fff6ce394f98 100644
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -323,19 +323,31 @@ static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
 					  enum drm_connector_status status)
 {
 	struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
-	struct edid *edid;
 
 	if (!encoder_hdmi->cec_notifier)
 		return;
 
 	if (status == connector_status_connected) {
-		edid = drm_bridge_get_edid(encoder_hdmi->next_bridge, encoder_hdmi->connector);
-		if (!edid)
+		const struct drm_edid *drm_edid;
+		const struct edid *edid;
+
+		drm_edid = drm_bridge_edid_read(encoder_hdmi->next_bridge,
+						encoder_hdmi->connector);
+		if (!drm_edid)
 			return;
 
+		/*
+		 * FIXME: The CEC physical address should be set using
+		 * cec_notifier_set_phys_addr(encoder_hdmi->cec_notifier,
+		 * connector->display_info.source_physical_address) from a path
+		 * that has read the EDID and called
+		 * drm_edid_connector_update().
+		 */
+		edid = drm_edid_raw(drm_edid);
+
 		cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
 
-		kfree(edid);
+		drm_edid_free(drm_edid);
 	} else
 		cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
 }
-- 
2.39.2

[PATCH v2 13/39] drm/bridge: remove drm_bridge_get_edid() in favour of drm_bridge_edid_read()

[Jani Nikula]

All users of drm_bridge_get_edid() have been converted to use
drm_bridge_edid_read(). Remove drm_bridge_get_edid().

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_bridge.c | 28 ++--------------------------
 include/drm/drm_bridge.h     |  2 --
 2 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 4f6f8c662d3f..a3065d4aa3d6 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -1217,7 +1217,7 @@ EXPORT_SYMBOL_GPL(drm_bridge_get_modes);
  * the EDID and return it. Otherwise return NULL.
  *
  * If &drm_bridge_funcs.edid_read is not set, fall back to using
- * drm_bridge_get_edid() and wrapping it in struct drm_edid.
+ * &drm_bridge_funcs.get_edid and wrapping it in struct drm_edid.
  *
  * RETURNS:
  * The retrieved EDID on success, or NULL otherwise.
@@ -1233,7 +1233,7 @@ const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
 		const struct drm_edid *drm_edid;
 		struct edid *edid;
 
-		edid = drm_bridge_get_edid(bridge, connector);
+		edid = bridge->funcs->get_edid(bridge, connector);
 		if (!edid)
 			return NULL;
 
@@ -1248,30 +1248,6 @@ const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
 }
 EXPORT_SYMBOL_GPL(drm_bridge_edid_read);
 
-/**
- * drm_bridge_get_edid - get the EDID data of the connected display
- * @bridge: bridge control structure
- * @connector: the connector to read EDID for
- *
- * If the bridge supports output EDID retrieval, as reported by the
- * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.get_edid to
- * get the EDID and return it. Otherwise return NULL.
- *
- * Deprecated. Prefer using drm_bridge_edid_read().
- *
- * RETURNS:
- * The retrieved EDID on success, or NULL otherwise.
- */
-struct edid *drm_bridge_get_edid(struct drm_bridge *bridge,
-				 struct drm_connector *connector)
-{
-	if (!(bridge->ops & DRM_BRIDGE_OP_EDID))
-		return NULL;
-
-	return bridge->funcs->get_edid(bridge, connector);
-}
-EXPORT_SYMBOL_GPL(drm_bridge_get_edid);
-
 /**
  * drm_bridge_hpd_enable - enable hot plug detection for the bridge
  * @bridge: bridge control structure
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index b7aed3ead705..ee12f829aaf7 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -921,8 +921,6 @@ int drm_bridge_get_modes(struct drm_bridge *bridge,
 			 struct drm_connector *connector);
 const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
 					    struct drm_connector *connector);
-struct edid *drm_bridge_get_edid(struct drm_bridge *bridge,
-				 struct drm_connector *connector);
 void drm_bridge_hpd_enable(struct drm_bridge *bridge,
 			   void (*cb)(void *data,
 				      enum drm_connector_status status),
-- 
2.39.2

[PATCH v2 14/39] drm/bridge: anx7625: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback.

v2: Fix build (goto out;)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 30 ++++++++---------------
 1 file changed, 10 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index ef31033439bc..25f7afa408c2 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1782,24 +1782,14 @@ static ssize_t anx7625_aux_transfer(struct drm_dp_aux *aux,
 	return ret;
 }
 
-static struct edid *anx7625_get_edid(struct anx7625_data *ctx)
+static const struct drm_edid *anx7625_edid_read(struct anx7625_data *ctx)
 {
 	struct device *dev = ctx->dev;
 	struct s_edid_data *p_edid = &ctx->slimport_edid_p;
 	int edid_num;
-	u8 *edid;
 
-	edid = kmalloc(FOUR_BLOCK_SIZE, GFP_KERNEL);
-	if (!edid) {
-		DRM_DEV_ERROR(dev, "Fail to allocate buffer\n");
-		return NULL;
-	}
-
-	if (ctx->slimport_edid_p.edid_block_num > 0) {
-		memcpy(edid, ctx->slimport_edid_p.edid_raw_data,
-		       FOUR_BLOCK_SIZE);
-		return (struct edid *)edid;
-	}
+	if (ctx->slimport_edid_p.edid_block_num > 0)
+		goto out;
 
 	pm_runtime_get_sync(dev);
 	_anx7625_hpd_polling(ctx, 5000 * 100);
@@ -1808,14 +1798,14 @@ static struct edid *anx7625_get_edid(struct anx7625_data *ctx)
 
 	if (edid_num < 1) {
 		DRM_DEV_ERROR(dev, "Fail to read EDID: %d\n", edid_num);
-		kfree(edid);
 		return NULL;
 	}
 
 	p_edid->edid_block_num = edid_num;
 
-	memcpy(edid, ctx->slimport_edid_p.edid_raw_data, FOUR_BLOCK_SIZE);
-	return (struct edid *)edid;
+out:
+	return drm_edid_alloc(ctx->slimport_edid_p.edid_raw_data,
+			      FOUR_BLOCK_SIZE);
 }
 
 static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
@@ -2488,15 +2478,15 @@ anx7625_bridge_detect(struct drm_bridge *bridge)
 	return anx7625_sink_detect(ctx);
 }
 
-static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *anx7625_bridge_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
 	struct device *dev = ctx->dev;
 
 	DRM_DEV_DEBUG_DRIVER(dev, "drm bridge get edid\n");
 
-	return anx7625_get_edid(ctx);
+	return anx7625_edid_read(ctx);
 }
 
 static const struct drm_bridge_funcs anx7625_bridge_funcs = {
@@ -2511,7 +2501,7 @@ static const struct drm_bridge_funcs anx7625_bridge_funcs = {
 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
 	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.detect = anx7625_bridge_detect,
-	.get_edid = anx7625_bridge_get_edid,
+	.edid_read = anx7625_bridge_edid_read,
 };
 
 static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
-- 
2.39.2

[PATCH v2 15/39] drm/bridge: cdns-mhdp8546: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 .../drm/bridge/cadence/cdns-mhdp8546-core.c   | 26 +++++++++----------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index 7d470527455b..e44cb89c33f0 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -1505,33 +1505,33 @@ static void cdns_mhdp_link_down(struct cdns_mhdp_device *mhdp)
 	mhdp->link_up = false;
 }
 
-static struct edid *cdns_mhdp_get_edid(struct cdns_mhdp_device *mhdp,
-				       struct drm_connector *connector)
+static const struct drm_edid *cdns_mhdp_edid_read(struct cdns_mhdp_device *mhdp,
+						  struct drm_connector *connector)
 {
 	if (!mhdp->plugged)
 		return NULL;
 
-	return drm_do_get_edid(connector, cdns_mhdp_get_edid_block, mhdp);
+	return drm_edid_read_custom(connector, cdns_mhdp_get_edid_block, mhdp);
 }
 
 static int cdns_mhdp_get_modes(struct drm_connector *connector)
 {
 	struct cdns_mhdp_device *mhdp = connector_to_mhdp(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int num_modes;
 
 	if (!mhdp->plugged)
 		return 0;
 
-	edid = cdns_mhdp_get_edid(mhdp, connector);
-	if (!edid) {
+	drm_edid = cdns_mhdp_edid_read(mhdp, connector);
+	if (!drm_edid) {
 		dev_err(mhdp->dev, "Failed to read EDID\n");
 		return 0;
 	}
 
-	drm_connector_update_edid_property(connector, edid);
-	num_modes = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid_connector_update(connector, drm_edid);
+	num_modes = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	/*
 	 * HACK: Warn about unsupported display formats until we deal
@@ -2220,12 +2220,12 @@ static enum drm_connector_status cdns_mhdp_bridge_detect(struct drm_bridge *brid
 	return cdns_mhdp_detect(mhdp);
 }
 
-static struct edid *cdns_mhdp_bridge_get_edid(struct drm_bridge *bridge,
-					      struct drm_connector *connector)
+static const struct drm_edid *cdns_mhdp_bridge_edid_read(struct drm_bridge *bridge,
+							 struct drm_connector *connector)
 {
 	struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
 
-	return cdns_mhdp_get_edid(mhdp, connector);
+	return cdns_mhdp_edid_read(mhdp, connector);
 }
 
 static const struct drm_bridge_funcs cdns_mhdp_bridge_funcs = {
@@ -2239,7 +2239,7 @@ static const struct drm_bridge_funcs cdns_mhdp_bridge_funcs = {
 	.atomic_reset = cdns_mhdp_bridge_atomic_reset,
 	.atomic_get_input_bus_fmts = cdns_mhdp_get_input_bus_fmts,
 	.detect = cdns_mhdp_bridge_detect,
-	.get_edid = cdns_mhdp_bridge_get_edid,
+	.edid_read = cdns_mhdp_bridge_edid_read,
 	.hpd_enable = cdns_mhdp_bridge_hpd_enable,
 	.hpd_disable = cdns_mhdp_bridge_hpd_disable,
 };
-- 
2.39.2

[PATCH v2 16/39] drm/bridge: cdns-mhdp8546: clear the EDID property on failures

[Jani Nikula]

If EDID read fails, clear the EDID property.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index e44cb89c33f0..e226acc5c15e 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -1524,12 +1524,14 @@ static int cdns_mhdp_get_modes(struct drm_connector *connector)
 		return 0;
 
 	drm_edid = cdns_mhdp_edid_read(mhdp, connector);
+
+	drm_edid_connector_update(connector, drm_edid);
+
 	if (!drm_edid) {
 		dev_err(mhdp->dev, "Failed to read EDID\n");
 		return 0;
 	}
 
-	drm_edid_connector_update(connector, drm_edid);
 	num_modes = drm_edid_connector_add_modes(connector);
 	drm_edid_free(drm_edid);
 
-- 
2.39.2

[PATCH v2 17/39] drm/bridge: display-connector: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/display-connector.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c
index 08bd5695ddae..ab8e00baf3f1 100644
--- a/drivers/gpu/drm/bridge/display-connector.c
+++ b/drivers/gpu/drm/bridge/display-connector.c
@@ -81,12 +81,12 @@ display_connector_detect(struct drm_bridge *bridge)
 	}
 }
 
-static struct edid *display_connector_get_edid(struct drm_bridge *bridge,
-					       struct drm_connector *connector)
+static const struct drm_edid *display_connector_edid_read(struct drm_bridge *bridge,
+							  struct drm_connector *connector)
 {
 	struct display_connector *conn = to_display_connector(bridge);
 
-	return drm_get_edid(connector, conn->bridge.ddc);
+	return drm_edid_read_ddc(connector, conn->bridge.ddc);
 }
 
 /*
@@ -172,7 +172,7 @@ static u32 *display_connector_get_input_bus_fmts(struct drm_bridge *bridge,
 static const struct drm_bridge_funcs display_connector_bridge_funcs = {
 	.attach = display_connector_attach,
 	.detect = display_connector_detect,
-	.get_edid = display_connector_get_edid,
+	.edid_read = display_connector_edid_read,
 	.atomic_get_output_bus_fmts = display_connector_get_output_bus_fmts,
 	.atomic_get_input_bus_fmts = display_connector_get_input_bus_fmts,
 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
-- 
2.39.2

[PATCH v2 18/39] drm/bridge: it6505: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index 2f300f5ca051..914b58ec130d 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -458,7 +458,7 @@ struct it6505 {
 	/* it6505 driver hold option */
 	bool enable_drv_hold;
 
-	struct edid *cached_edid;
+	const struct drm_edid *cached_edid;
 };
 
 struct it6505_step_train_para {
@@ -2261,7 +2261,7 @@ static void it6505_plugged_status_to_codec(struct it6505 *it6505)
 
 static void it6505_remove_edid(struct it6505 *it6505)
 {
-	kfree(it6505->cached_edid);
+	drm_edid_free(it6505->cached_edid);
 	it6505->cached_edid = NULL;
 }
 
@@ -3032,15 +3032,16 @@ it6505_bridge_detect(struct drm_bridge *bridge)
 	return it6505_detect(it6505);
 }
 
-static struct edid *it6505_bridge_get_edid(struct drm_bridge *bridge,
-					   struct drm_connector *connector)
+static const struct drm_edid *it6505_bridge_edid_read(struct drm_bridge *bridge,
+						      struct drm_connector *connector)
 {
 	struct it6505 *it6505 = bridge_to_it6505(bridge);
 	struct device *dev = it6505->dev;
 
 	if (!it6505->cached_edid) {
-		it6505->cached_edid = drm_do_get_edid(connector, it6505_get_edid_block,
-						      it6505);
+		it6505->cached_edid = drm_edid_read_custom(connector,
+							   it6505_get_edid_block,
+							   it6505);
 
 		if (!it6505->cached_edid) {
 			DRM_DEV_DEBUG_DRIVER(dev, "failed to get edid!");
@@ -3048,7 +3049,7 @@ static struct edid *it6505_bridge_get_edid(struct drm_bridge *bridge,
 		}
 	}
 
-	return drm_edid_duplicate(it6505->cached_edid);
+	return drm_edid_dup(it6505->cached_edid);
 }
 
 static const struct drm_bridge_funcs it6505_bridge_funcs = {
@@ -3063,7 +3064,7 @@ static const struct drm_bridge_funcs it6505_bridge_funcs = {
 	.atomic_pre_enable = it6505_bridge_atomic_pre_enable,
 	.atomic_post_disable = it6505_bridge_atomic_post_disable,
 	.detect = it6505_bridge_detect,
-	.get_edid = it6505_bridge_get_edid,
+	.edid_read = it6505_bridge_edid_read,
 };
 
 static __maybe_unused int it6505_bridge_resume(struct device *dev)
-- 
2.39.2

[PATCH v2 19/39] drm: bridge: it66121: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/ite-it66121.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
index 1cf3fb1f13dc..1c3433b5e366 100644
--- a/drivers/gpu/drm/bridge/ite-it66121.c
+++ b/drivers/gpu/drm/bridge/ite-it66121.c
@@ -874,33 +874,33 @@ static void it66121_bridge_hpd_disable(struct drm_bridge *bridge)
 		dev_err(ctx->dev, "failed to disable HPD IRQ\n");
 }
 
-static struct edid *it66121_bridge_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *it66121_bridge_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
 	mutex_lock(&ctx->lock);
 	ret = it66121_preamble_ddc(ctx);
 	if (ret) {
-		edid = NULL;
+		drm_edid = NULL;
 		goto out_unlock;
 	}
 
 	ret = regmap_write(ctx->regmap, IT66121_DDC_HEADER_REG,
 			   IT66121_DDC_HEADER_EDID);
 	if (ret) {
-		edid = NULL;
+		drm_edid = NULL;
 		goto out_unlock;
 	}
 
-	edid = drm_do_get_edid(connector, it66121_get_edid_block, ctx);
+	drm_edid = drm_edid_read_custom(connector, it66121_get_edid_block, ctx);
 
 out_unlock:
 	mutex_unlock(&ctx->lock);
 
-	return edid;
+	return drm_edid;
 }
 
 static const struct drm_bridge_funcs it66121_bridge_funcs = {
@@ -916,7 +916,7 @@ static const struct drm_bridge_funcs it66121_bridge_funcs = {
 	.mode_set = it66121_bridge_mode_set,
 	.mode_valid = it66121_bridge_mode_valid,
 	.detect = it66121_bridge_detect,
-	.get_edid = it66121_bridge_get_edid,
+	.edid_read = it66121_bridge_edid_read,
 	.hpd_enable = it66121_bridge_hpd_enable,
 	.hpd_disable = it66121_bridge_hpd_disable,
 };
-- 
2.39.2

[PATCH v2 20/39] drm/bridge: lt9611: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/lontium-lt9611.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 9663601ce098..1385e3378985 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -846,13 +846,13 @@ lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge,
 	lt9611_sleep_setup(lt9611);
 }
 
-static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge,
-					   struct drm_connector *connector)
+static const struct drm_edid *lt9611_bridge_edid_read(struct drm_bridge *bridge,
+						      struct drm_connector *connector)
 {
 	struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
 
 	lt9611_power_on(lt9611);
-	return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
+	return drm_edid_read_custom(connector, lt9611_get_edid_block, lt9611);
 }
 
 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
@@ -892,7 +892,7 @@ static const struct drm_bridge_funcs lt9611_bridge_funcs = {
 	.attach = lt9611_bridge_attach,
 	.mode_valid = lt9611_bridge_mode_valid,
 	.detect = lt9611_bridge_detect,
-	.get_edid = lt9611_bridge_get_edid,
+	.edid_read = lt9611_bridge_edid_read,
 	.hpd_enable = lt9611_bridge_hpd_enable,
 
 	.atomic_pre_enable = lt9611_bridge_atomic_pre_enable,
-- 
2.39.2

[PATCH v2 21/39] drm/bridge: lt9611uxc: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 3d916306a47d..28ceae10fa25 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -494,8 +494,8 @@ static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, siz
 	return 0;
 };
 
-static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge,
-					      struct drm_connector *connector)
+static const struct drm_edid *lt9611uxc_bridge_edid_read(struct drm_bridge *bridge,
+							 struct drm_connector *connector)
 {
 	struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
 	int ret;
@@ -509,7 +509,7 @@ static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge,
 		return NULL;
 	}
 
-	return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc);
+	return drm_edid_read_custom(connector, lt9611uxc_get_edid_block, lt9611uxc);
 }
 
 static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
@@ -517,7 +517,7 @@ static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
 	.mode_valid = lt9611uxc_bridge_mode_valid,
 	.mode_set = lt9611uxc_bridge_mode_set,
 	.detect = lt9611uxc_bridge_detect,
-	.get_edid = lt9611uxc_bridge_get_edid,
+	.edid_read = lt9611uxc_bridge_edid_read,
 };
 
 static int lt9611uxc_parse_dt(struct device *dev,
-- 
2.39.2

[PATCH v2 22/39] drm/bridge: megachips: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 .../bridge/megachips-stdpxxxx-ge-b850v3-fw.c   | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
index e93083bbec9d..4480523244e4 100644
--- a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
+++ b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
@@ -91,26 +91,26 @@ static int stdp2690_read_block(void *context, u8 *buf, unsigned int block, size_
 	return 0;
 }
 
-static struct edid *ge_b850v3_lvds_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *ge_b850v3_lvds_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct i2c_client *client;
 
 	client = ge_b850v3_lvds_ptr->stdp2690_i2c;
 
-	return drm_do_get_edid(connector, stdp2690_read_block, client);
+	return drm_edid_read_custom(connector, stdp2690_read_block, client);
 }
 
 static int ge_b850v3_lvds_get_modes(struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int num_modes;
 
-	edid = ge_b850v3_lvds_get_edid(&ge_b850v3_lvds_ptr->bridge, connector);
+	drm_edid = ge_b850v3_lvds_edid_read(&ge_b850v3_lvds_ptr->bridge, connector);
 
-	drm_connector_update_edid_property(connector, edid);
-	num_modes = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid_connector_update(connector, drm_edid);
+	num_modes = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return num_modes;
 }
@@ -226,7 +226,7 @@ static int ge_b850v3_lvds_attach(struct drm_bridge *bridge,
 static const struct drm_bridge_funcs ge_b850v3_lvds_funcs = {
 	.attach = ge_b850v3_lvds_attach,
 	.detect = ge_b850v3_lvds_bridge_detect,
-	.get_edid = ge_b850v3_lvds_get_edid,
+	.edid_read = ge_b850v3_lvds_edid_read,
 };
 
 static int ge_b850v3_lvds_init(struct device *dev)
-- 
2.39.2

[PATCH v2 23/39] drm/bridge: nxp-ptn3460: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/nxp-ptn3460.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index 7c0076e49953..4af3af5662cc 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -154,10 +154,11 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 }
 
 
-static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
-				     struct drm_connector *connector)
+static const struct drm_edid *ptn3460_edid_read(struct drm_bridge *bridge,
+						struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+	const struct drm_edid *drm_edid;
 	bool power_off;
 	u8 *edid;
 	int ret;
@@ -175,27 +176,29 @@ static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
 				 EDID_LENGTH);
 	if (ret) {
 		kfree(edid);
-		edid = NULL;
+		drm_edid = NULL;
 		goto out;
 	}
 
+	drm_edid = drm_edid_alloc(edid, EDID_LENGTH);
+
 out:
 	if (power_off)
 		ptn3460_disable(&ptn_bridge->bridge);
 
-	return (struct edid *)edid;
+	return drm_edid;
 }
 
 static int ptn3460_connector_get_modes(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int num_modes;
 
-	edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);
-	drm_connector_update_edid_property(connector, edid);
-	num_modes = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid = ptn3460_edid_read(&ptn_bridge->bridge, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	num_modes = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return num_modes;
 }
@@ -254,7 +257,7 @@ static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.pre_enable = ptn3460_pre_enable,
 	.disable = ptn3460_disable,
 	.attach = ptn3460_bridge_attach,
-	.get_edid = ptn3460_get_edid,
+	.edid_read = ptn3460_edid_read,
 };
 
 static int ptn3460_probe(struct i2c_client *client)
-- 
2.39.2

Re: [PATCH v2 23/39] drm/bridge: nxp-ptn3460: switch to ->edid_read callback

[kernel test robot]

Hi Jani,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.7-rc8 next-20240103]
[cannot apply to drm-intel/for-linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jani-Nikula/drm-bridge-add-edid_read-hook-and-drm_bridge_edid_read/20240103-181513
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/87fb7fd52d087dd9a15b7194f3915b6b1c4146d6.1704276309.git.jani.nikula%40intel.com
patch subject: [PATCH v2 23/39] drm/bridge: nxp-ptn3460: switch to ->edid_read callback
config: arm-randconfig-001-20240103 (https://download.01.org/0day-ci/archive/20240104/202401040455.PPhqJiVr-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 7e186d366d6c7def0543acc255931f617e76dff0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240104/202401040455.PPhqJiVr-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401040455.PPhqJiVr-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/bridge/nxp-ptn3460.c:170:6: warning: variable 'drm_edid' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
     170 |         if (!edid) {
         |             ^~~~~
   drivers/gpu/drm/bridge/nxp-ptn3460.c:189:9: note: uninitialized use occurs here
     189 |         return drm_edid;
         |                ^~~~~~~~
   drivers/gpu/drm/bridge/nxp-ptn3460.c:170:2: note: remove the 'if' if its condition is always false
     170 |         if (!edid) {
         |         ^~~~~~~~~~~~
     171 |                 DRM_ERROR("Failed to allocate EDID\n");
         |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     172 |                 goto out;
         |                 ~~~~~~~~~
     173 |         }
         |         ~
   drivers/gpu/drm/bridge/nxp-ptn3460.c:161:33: note: initialize the variable 'drm_edid' to silence this warning
     161 |         const struct drm_edid *drm_edid;
         |                                        ^
         |                                         = NULL
   1 warning generated.


vim +170 drivers/gpu/drm/bridge/nxp-ptn3460.c

a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  155  
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  156  
dd6c2ed9dace84 drivers/gpu/drm/bridge/nxp-ptn3460.c Jani Nikula  2024-01-03  157  static const struct drm_edid *ptn3460_edid_read(struct drm_bridge *bridge,
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  158  						struct drm_connector *connector)
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  159  {
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  160  	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
dd6c2ed9dace84 drivers/gpu/drm/bridge/nxp-ptn3460.c Jani Nikula  2024-01-03  161  	const struct drm_edid *drm_edid;
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  162  	bool power_off;
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  163  	u8 *edid;
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  164  	int ret;
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  165  
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  166  	power_off = !ptn_bridge->enabled;
94d50d57c4403a drivers/gpu/drm/bridge/ptn3460.c     Ajay Kumar   2015-01-20  167  	ptn3460_pre_enable(&ptn_bridge->bridge);
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  168  
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  169  	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24 @170  	if (!edid) {
94d50d57c4403a drivers/gpu/drm/bridge/ptn3460.c     Ajay Kumar   2015-01-20  171  		DRM_ERROR("Failed to allocate EDID\n");
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  172  		goto out;
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  173  	}
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  174  
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  175  	ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid,
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  176  				 EDID_LENGTH);
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  177  	if (ret) {
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  178  		kfree(edid);
dd6c2ed9dace84 drivers/gpu/drm/bridge/nxp-ptn3460.c Jani Nikula  2024-01-03  179  		drm_edid = NULL;
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  180  		goto out;
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  181  	}
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  182  
dd6c2ed9dace84 drivers/gpu/drm/bridge/nxp-ptn3460.c Jani Nikula  2024-01-03  183  	drm_edid = drm_edid_alloc(edid, EDID_LENGTH);
dd6c2ed9dace84 drivers/gpu/drm/bridge/nxp-ptn3460.c Jani Nikula  2024-01-03  184  
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  185  out:
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  186  	if (power_off)
94d50d57c4403a drivers/gpu/drm/bridge/ptn3460.c     Ajay Kumar   2015-01-20  187  		ptn3460_disable(&ptn_bridge->bridge);
a9fe713d7d45c6 drivers/gpu/drm/bridge/ptn3460.c     Sean Paul    2014-02-24  188  
dd6c2ed9dace84 drivers/gpu/drm/bridge/nxp-ptn3460.c Jani Nikula  2024-01-03  189  	return drm_edid;
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  190  }
4151c14cdda689 drivers/gpu/drm/bridge/nxp-ptn3460.c Sam Ravnborg 2020-07-27  191  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2 23/39] drm/bridge: nxp-ptn3460: switch to ->edid_read callback

[Jani Nikula]

On Thu, 04 Jan 2024, kernel test robot <lkp@intel.com> wrote:
> Hi Jani,
>
> kernel test robot noticed the following build warnings:
>
> [auto build test WARNING on drm-misc/drm-misc-next]
> [also build test WARNING on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.7-rc8 next-20240103]
> [cannot apply to drm-intel/for-linux-next]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Jani-Nikula/drm-bridge-add-edid_read-hook-and-drm_bridge_edid_read/20240103-181513
> base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
> patch link:    https://lore.kernel.org/r/87fb7fd52d087dd9a15b7194f3915b6b1c4146d6.1704276309.git.jani.nikula%40intel.com
> patch subject: [PATCH v2 23/39] drm/bridge: nxp-ptn3460: switch to ->edid_read callback
> config: arm-randconfig-001-20240103 (https://download.01.org/0day-ci/archive/20240104/202401040455.PPhqJiVr-lkp@intel.com/config)
> compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 7e186d366d6c7def0543acc255931f617e76dff0)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240104/202401040455.PPhqJiVr-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202401040455.PPhqJiVr-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
>>> drivers/gpu/drm/bridge/nxp-ptn3460.c:170:6: warning: variable 'drm_edid' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
>      170 |         if (!edid) {
>          |             ^~~~~
>    drivers/gpu/drm/bridge/nxp-ptn3460.c:189:9: note: uninitialized use occurs here
>      189 |         return drm_edid;
>          |                ^~~~~~~~
>    drivers/gpu/drm/bridge/nxp-ptn3460.c:170:2: note: remove the 'if' if its condition is always false
>      170 |         if (!edid) {
>          |         ^~~~~~~~~~~~
>      171 |                 DRM_ERROR("Failed to allocate EDID\n");
>          |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>      172 |                 goto out;
>          |                 ~~~~~~~~~
>      173 |         }
>          |         ~
>    drivers/gpu/drm/bridge/nxp-ptn3460.c:161:33: note: initialize the variable 'drm_edid' to silence this warning
>      161 |         const struct drm_edid *drm_edid;
>          |                                        ^
>          |                                         = NULL
>    1 warning generated.

This is a valid report, fixed locally.

BR,
Jani.


-- 
Jani Nikula, Intel

[PATCH v2] drm/bridge: nxp-ptn3460: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

v2: Fix -Wsometimes-uninitialized (kernel test robot)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/nxp-ptn3460.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index 7c0076e49953..ed93fd4c3265 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -154,10 +154,11 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 }
 
 
-static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
-				     struct drm_connector *connector)
+static const struct drm_edid *ptn3460_edid_read(struct drm_bridge *bridge,
+						struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+	const struct drm_edid *drm_edid = NULL;
 	bool power_off;
 	u8 *edid;
 	int ret;
@@ -175,27 +176,28 @@ static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
 				 EDID_LENGTH);
 	if (ret) {
 		kfree(edid);
-		edid = NULL;
 		goto out;
 	}
 
+	drm_edid = drm_edid_alloc(edid, EDID_LENGTH);
+
 out:
 	if (power_off)
 		ptn3460_disable(&ptn_bridge->bridge);
 
-	return (struct edid *)edid;
+	return drm_edid;
 }
 
 static int ptn3460_connector_get_modes(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int num_modes;
 
-	edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);
-	drm_connector_update_edid_property(connector, edid);
-	num_modes = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid = ptn3460_edid_read(&ptn_bridge->bridge, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	num_modes = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return num_modes;
 }
@@ -254,7 +256,7 @@ static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.pre_enable = ptn3460_pre_enable,
 	.disable = ptn3460_disable,
 	.attach = ptn3460_bridge_attach,
-	.get_edid = ptn3460_get_edid,
+	.edid_read = ptn3460_edid_read,
 };
 
 static int ptn3460_probe(struct i2c_client *client)
-- 
2.39.2

[PATCH v2 24/39] drm/bridge: sii902x: use display info is_hdmi

[Jani Nikula]

Use the pre-parsed information instead of parsing EDID again.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/sii902x.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 2bdc5b439beb..2f876b805b83 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -286,12 +286,6 @@ static struct edid *sii902x_get_edid(struct sii902x *sii902x,
 	mutex_lock(&sii902x->mutex);
 
 	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
-	if (edid) {
-		if (drm_detect_hdmi_monitor(edid))
-			sii902x->sink_is_hdmi = true;
-		else
-			sii902x->sink_is_hdmi = false;
-	}
 
 	mutex_unlock(&sii902x->mutex);
 
@@ -311,6 +305,8 @@ static int sii902x_get_modes(struct drm_connector *connector)
 		kfree(edid);
 	}
 
+	sii902x->sink_is_hdmi = connector->display_info.is_hdmi;
+
 	return num;
 }
 
-- 
2.39.2

[PATCH v2 25/39] drm/bridge: sii902x: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/sii902x.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 2f876b805b83..12346bacecaf 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -278,31 +278,31 @@ static const struct drm_connector_funcs sii902x_connector_funcs = {
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
-static struct edid *sii902x_get_edid(struct sii902x *sii902x,
-				     struct drm_connector *connector)
+static const struct drm_edid *sii902x_edid_read(struct sii902x *sii902x,
+						struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 
 	mutex_lock(&sii902x->mutex);
 
-	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
+	drm_edid = drm_edid_read_ddc(connector, sii902x->i2cmux->adapter[0]);
 
 	mutex_unlock(&sii902x->mutex);
 
-	return edid;
+	return drm_edid;
 }
 
 static int sii902x_get_modes(struct drm_connector *connector)
 {
 	struct sii902x *sii902x = connector_to_sii902x(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int num = 0;
 
-	edid = sii902x_get_edid(sii902x, connector);
-	drm_connector_update_edid_property(connector, edid);
-	if (edid) {
-		num = drm_add_edid_modes(connector, edid);
-		kfree(edid);
+	drm_edid = sii902x_edid_read(sii902x, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	if (drm_edid) {
+		num = drm_edid_connector_add_modes(connector);
+		drm_edid_free(drm_edid);
 	}
 
 	sii902x->sink_is_hdmi = connector->display_info.is_hdmi;
@@ -461,12 +461,12 @@ static enum drm_connector_status sii902x_bridge_detect(struct drm_bridge *bridge
 	return sii902x_detect(sii902x);
 }
 
-static struct edid *sii902x_bridge_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *sii902x_bridge_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct sii902x *sii902x = bridge_to_sii902x(bridge);
 
-	return sii902x_get_edid(sii902x, connector);
+	return sii902x_edid_read(sii902x, connector);
 }
 
 static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
@@ -510,7 +510,7 @@ static const struct drm_bridge_funcs sii902x_bridge_funcs = {
 	.disable = sii902x_bridge_disable,
 	.enable = sii902x_bridge_enable,
 	.detect = sii902x_bridge_detect,
-	.get_edid = sii902x_bridge_get_edid,
+	.edid_read = sii902x_bridge_edid_read,
 	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
-- 
2.39.2

[PATCH v2 26/39] drm/mediatek/dp: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 31 ++++++++++++++++++++-----------
 1 file changed, 20 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 2136a596efa1..0ba72102636a 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -2042,12 +2042,12 @@ static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge)
 	return ret;
 }
 
-static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
-				    struct drm_connector *connector)
+static const struct drm_edid *mtk_dp_edid_read(struct drm_bridge *bridge,
+					       struct drm_connector *connector)
 {
 	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
 	bool enabled = mtk_dp->enabled;
-	struct edid *new_edid = NULL;
+	const struct drm_edid *drm_edid;
 	struct mtk_dp_audio_cfg *audio_caps = &mtk_dp->info.audio_cur_cfg;
 
 	if (!enabled) {
@@ -2055,7 +2055,7 @@ static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
 		mtk_dp_aux_panel_poweron(mtk_dp, true);
 	}
 
-	new_edid = drm_get_edid(connector, &mtk_dp->aux.ddc);
+	drm_edid = drm_edid_read_ddc(connector, &mtk_dp->aux.ddc);
 
 	/*
 	 * Parse capability here to let atomic_get_input_bus_fmts and
@@ -2063,17 +2063,26 @@ static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
 	 */
 	if (mtk_dp_parse_capabilities(mtk_dp)) {
 		drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
-		kfree(new_edid);
-		new_edid = NULL;
+		drm_edid_free(drm_edid);
+		drm_edid = NULL;
 	}
 
-	if (new_edid) {
+	if (drm_edid) {
+		/*
+		 * FIXME: get rid of drm_edid_raw()
+		 */
+		const struct edid *edid = drm_edid_raw(drm_edid);
 		struct cea_sad *sads;
 
-		audio_caps->sad_count = drm_edid_to_sad(new_edid, &sads);
+		audio_caps->sad_count = drm_edid_to_sad(edid, &sads);
 		kfree(sads);
 
-		audio_caps->detect_monitor = drm_detect_monitor_audio(new_edid);
+		/*
+		 * FIXME: This should use connector->display_info.has_audio from
+		 * a path that has read the EDID and called
+		 * drm_edid_connector_update().
+		 */
+		audio_caps->detect_monitor = drm_detect_monitor_audio(edid);
 	}
 
 	if (!enabled) {
@@ -2081,7 +2090,7 @@ static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
 		drm_atomic_bridge_chain_post_disable(bridge, connector->state->state);
 	}
 
-	return new_edid;
+	return drm_edid;
 }
 
 static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
@@ -2433,7 +2442,7 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
 	.atomic_enable = mtk_dp_bridge_atomic_enable,
 	.atomic_disable = mtk_dp_bridge_atomic_disable,
 	.mode_valid = mtk_dp_bridge_mode_valid,
-	.get_edid = mtk_dp_get_edid,
+	.edid_read = mtk_dp_edid_read,
 	.detect = mtk_dp_bdg_detect,
 };
 
-- 
2.39.2

[PATCH v2 27/39] drm/mediatek/hdmi: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 86133bf16326..c6bdc565e4a9 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1265,19 +1265,27 @@ static enum drm_connector_status mtk_hdmi_bridge_detect(struct drm_bridge *bridg
 	return mtk_hdmi_detect(hdmi);
 }
 
-static struct edid *mtk_hdmi_bridge_get_edid(struct drm_bridge *bridge,
-					     struct drm_connector *connector)
+static const struct drm_edid *mtk_hdmi_bridge_edid_read(struct drm_bridge *bridge,
+							struct drm_connector *connector)
 {
 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 
 	if (!hdmi->ddc_adpt)
 		return NULL;
-	edid = drm_get_edid(connector, hdmi->ddc_adpt);
-	if (!edid)
-		return NULL;
-	hdmi->dvi_mode = !drm_detect_monitor_audio(edid);
-	return edid;
+	drm_edid = drm_edid_read_ddc(connector, hdmi->ddc_adpt);
+	if (drm_edid) {
+		/*
+		 * FIXME: This should use !connector->display_info.has_audio (or
+		 * !connector->display_info.is_hdmi) from a path that has read
+		 * the EDID and called drm_edid_connector_update().
+		 */
+		const struct edid *edid = drm_edid_raw(drm_edid);
+
+		hdmi->dvi_mode = !drm_detect_monitor_audio(edid);
+	}
+
+	return drm_edid;
 }
 
 static int mtk_hdmi_bridge_attach(struct drm_bridge *bridge,
@@ -1417,7 +1425,7 @@ static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
 	.atomic_pre_enable = mtk_hdmi_bridge_atomic_pre_enable,
 	.atomic_enable = mtk_hdmi_bridge_atomic_enable,
 	.detect = mtk_hdmi_bridge_detect,
-	.get_edid = mtk_hdmi_bridge_get_edid,
+	.edid_read = mtk_hdmi_bridge_edid_read,
 };
 
 static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
-- 
2.39.2

[PATCH v2 28/39] drm/msm/hdmi: fix indent

[Jani Nikula]

Remove the excess leading tabs.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index f5e01471b0b0..f28c61570533 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -290,12 +290,12 @@ static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge
 }
 
 static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
-		.pre_enable = msm_hdmi_bridge_pre_enable,
-		.post_disable = msm_hdmi_bridge_post_disable,
-		.mode_set = msm_hdmi_bridge_mode_set,
-		.mode_valid = msm_hdmi_bridge_mode_valid,
-		.get_edid = msm_hdmi_bridge_get_edid,
-		.detect = msm_hdmi_bridge_detect,
+	.pre_enable = msm_hdmi_bridge_pre_enable,
+	.post_disable = msm_hdmi_bridge_post_disable,
+	.mode_set = msm_hdmi_bridge_mode_set,
+	.mode_valid = msm_hdmi_bridge_mode_valid,
+	.get_edid = msm_hdmi_bridge_get_edid,
+	.detect = msm_hdmi_bridge_detect,
 };
 
 static void
-- 
2.39.2

[PATCH v2 29/39] drm/msm/hdmi: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index f28c61570533..4a5b5112227f 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -236,24 +236,33 @@ static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 		msm_hdmi_audio_update(hdmi);
 }
 
-static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge,
-		struct drm_connector *connector)
+static const struct drm_edid *msm_hdmi_bridge_edid_read(struct drm_bridge *bridge,
+							struct drm_connector *connector)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
 	struct hdmi *hdmi = hdmi_bridge->hdmi;
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	uint32_t hdmi_ctrl;
 
 	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
 	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
 
-	edid = drm_get_edid(connector, hdmi->i2c);
+	drm_edid = drm_edid_read_ddc(connector, hdmi->i2c);
 
 	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
 
-	hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
+	if (drm_edid) {
+		/*
+		 * FIXME: This should use connector->display_info.is_hdmi from a
+		 * path that has read the EDID and called
+		 * drm_edid_connector_update().
+		 */
+		const struct edid *edid = drm_edid_raw(drm_edid);
 
-	return edid;
+		hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
+	}
+
+	return drm_edid;
 }
 
 static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
@@ -294,7 +303,7 @@ static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
 	.post_disable = msm_hdmi_bridge_post_disable,
 	.mode_set = msm_hdmi_bridge_mode_set,
 	.mode_valid = msm_hdmi_bridge_mode_valid,
-	.get_edid = msm_hdmi_bridge_get_edid,
+	.edid_read = msm_hdmi_bridge_edid_read,
 	.detect = msm_hdmi_bridge_detect,
 };
 
-- 
2.39.2

[PATCH v2 30/39] drm/omap/hdmi4: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/omapdrm/dss/hdmi4.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4.c b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
index a26b77d99d52..9b8747d83ee8 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi4.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
@@ -436,11 +436,11 @@ static void hdmi4_bridge_hpd_notify(struct drm_bridge *bridge,
 		hdmi4_cec_set_phys_addr(&hdmi->core, CEC_PHYS_ADDR_INVALID);
 }
 
-static struct edid *hdmi4_bridge_get_edid(struct drm_bridge *bridge,
-					  struct drm_connector *connector)
+static const struct drm_edid *hdmi4_bridge_edid_read(struct drm_bridge *bridge,
+						     struct drm_connector *connector)
 {
 	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
-	struct edid *edid = NULL;
+	const struct drm_edid *drm_edid = NULL;
 	unsigned int cec_addr;
 	bool need_enable;
 	int r;
@@ -461,13 +461,21 @@ static struct edid *hdmi4_bridge_get_edid(struct drm_bridge *bridge,
 	if (r)
 		goto done;
 
-	edid = drm_do_get_edid(connector, hdmi4_core_ddc_read, &hdmi->core);
+	drm_edid = drm_edid_read_custom(connector, hdmi4_core_ddc_read, &hdmi->core);
 
 done:
 	hdmi_runtime_put(hdmi);
 	mutex_unlock(&hdmi->lock);
 
-	if (edid && edid->extensions) {
+	if (drm_edid) {
+		/*
+		 * FIXME: The CEC physical address should be set using
+		 * hdmi4_cec_set_phys_addr(&hdmi->core,
+		 * connector->display_info.source_physical_address) from a path
+		 * that has read the EDID and called
+		 * drm_edid_connector_update().
+		 */
+		const struct edid *edid = drm_edid_raw(drm_edid);
 		unsigned int len = (edid->extensions + 1) * EDID_LENGTH;
 
 		cec_addr = cec_get_edid_phys_addr((u8 *)edid, len, NULL);
@@ -480,7 +488,7 @@ static struct edid *hdmi4_bridge_get_edid(struct drm_bridge *bridge,
 	if (need_enable)
 		hdmi4_core_disable(&hdmi->core);
 
-	return edid;
+	return drm_edid;
 }
 
 static const struct drm_bridge_funcs hdmi4_bridge_funcs = {
@@ -492,7 +500,7 @@ static const struct drm_bridge_funcs hdmi4_bridge_funcs = {
 	.atomic_enable = hdmi4_bridge_enable,
 	.atomic_disable = hdmi4_bridge_disable,
 	.hpd_notify = hdmi4_bridge_hpd_notify,
-	.get_edid = hdmi4_bridge_get_edid,
+	.edid_read = hdmi4_bridge_edid_read,
 };
 
 static void hdmi4_bridge_init(struct omap_hdmi *hdmi)
-- 
2.39.2

[PATCH v2 31/39] drm/omap/hdmi5: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/omapdrm/dss/hdmi5.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi5.c b/drivers/gpu/drm/omapdrm/dss/hdmi5.c
index e6611c683857..c7ae2235ae99 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi5.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi5.c
@@ -425,11 +425,11 @@ static void hdmi5_bridge_disable(struct drm_bridge *bridge,
 	mutex_unlock(&hdmi->lock);
 }
 
-static struct edid *hdmi5_bridge_get_edid(struct drm_bridge *bridge,
-					  struct drm_connector *connector)
+static const struct drm_edid *hdmi5_bridge_edid_read(struct drm_bridge *bridge,
+						     struct drm_connector *connector)
 {
 	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	bool need_enable;
 	int idlemode;
 	int r;
@@ -452,7 +452,7 @@ static struct edid *hdmi5_bridge_get_edid(struct drm_bridge *bridge,
 
 	hdmi5_core_ddc_init(&hdmi->core);
 
-	edid = drm_do_get_edid(connector, hdmi5_core_ddc_read, &hdmi->core);
+	drm_edid = drm_edid_read_custom(connector, hdmi5_core_ddc_read, &hdmi->core);
 
 	hdmi5_core_ddc_uninit(&hdmi->core);
 
@@ -464,7 +464,7 @@ static struct edid *hdmi5_bridge_get_edid(struct drm_bridge *bridge,
 	if (need_enable)
 		hdmi_core_disable(hdmi);
 
-	return (struct edid *)edid;
+	return drm_edid;
 }
 
 static const struct drm_bridge_funcs hdmi5_bridge_funcs = {
@@ -475,7 +475,7 @@ static const struct drm_bridge_funcs hdmi5_bridge_funcs = {
 	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.atomic_enable = hdmi5_bridge_enable,
 	.atomic_disable = hdmi5_bridge_disable,
-	.get_edid = hdmi5_bridge_get_edid,
+	.edid_read = hdmi5_bridge_edid_read,
 };
 
 static void hdmi5_bridge_init(struct omap_hdmi *hdmi)
-- 
2.39.2

[PATCH v2 32/39] drm: xlnx: zynqmp_dpsub: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/xlnx/zynqmp_dp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index a0606fab0e22..24213eaa38d0 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1560,12 +1560,12 @@ static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *brid
 	return connector_status_disconnected;
 }
 
-static struct edid *zynqmp_dp_bridge_get_edid(struct drm_bridge *bridge,
-					      struct drm_connector *connector)
+static const struct drm_edid *zynqmp_dp_bridge_edid_read(struct drm_bridge *bridge,
+							 struct drm_connector *connector)
 {
 	struct zynqmp_dp *dp = bridge_to_dp(bridge);
 
-	return drm_get_edid(connector, &dp->aux.ddc);
+	return drm_edid_read_ddc(connector, &dp->aux.ddc);
 }
 
 static const struct drm_bridge_funcs zynqmp_dp_bridge_funcs = {
@@ -1579,7 +1579,7 @@ static const struct drm_bridge_funcs zynqmp_dp_bridge_funcs = {
 	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.atomic_check = zynqmp_dp_bridge_atomic_check,
 	.detect = zynqmp_dp_bridge_detect,
-	.get_edid = zynqmp_dp_bridge_get_edid,
+	.edid_read = zynqmp_dp_bridge_edid_read,
 };
 
 /* -----------------------------------------------------------------------------
-- 
2.39.2

[PATCH v2 33/39] drm: adv7511: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 47 +++++++++++++-------
 1 file changed, 30 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index 8be235144f6d..1e40d451ce8c 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -604,10 +604,10 @@ static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
  * ADV75xx helpers
  */
 
-static struct edid *adv7511_get_edid(struct adv7511 *adv7511,
-				     struct drm_connector *connector)
+static const struct drm_edid *adv7511_edid_read(struct adv7511 *adv7511,
+						struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 
 	/* Reading the EDID only works if the device is powered */
 	if (!adv7511->powered) {
@@ -621,31 +621,44 @@ static struct edid *adv7511_get_edid(struct adv7511 *adv7511,
 			     edid_i2c_addr);
 	}
 
-	edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
+	drm_edid = drm_edid_read_custom(connector, adv7511_get_edid_block, adv7511);
 
 	if (!adv7511->powered)
 		__adv7511_power_off(adv7511);
 
-	adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
-			       drm_detect_hdmi_monitor(edid));
+	if (drm_edid) {
+		/*
+		 * FIXME: The CEC physical address should be set using
+		 * cec_s_phys_addr(adap,
+		 * connector->display_info.source_physical_address, false) from
+		 * a path that has read the EDID and called
+		 * drm_edid_connector_update().
+		 */
+		const struct edid *edid = drm_edid_raw(drm_edid);
+
+		adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
+				       drm_detect_hdmi_monitor(edid));
 
-	cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
+		cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
+	} else {
+		cec_s_phys_addr_from_edid(adv7511->cec_adap, NULL);
+	}
 
-	return edid;
+	return drm_edid;
 }
 
 static int adv7511_get_modes(struct adv7511 *adv7511,
 			     struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	unsigned int count;
 
-	edid = adv7511_get_edid(adv7511, connector);
+	drm_edid = adv7511_edid_read(adv7511, connector);
 
-	drm_connector_update_edid_property(connector, edid);
-	count = drm_add_edid_modes(connector, edid);
+	drm_edid_connector_update(connector, drm_edid);
+	count = drm_edid_connector_add_modes(connector);
 
-	kfree(edid);
+	drm_edid_free(drm_edid);
 
 	return count;
 }
@@ -953,12 +966,12 @@ static enum drm_connector_status adv7511_bridge_detect(struct drm_bridge *bridge
 	return adv7511_detect(adv, NULL);
 }
 
-static struct edid *adv7511_bridge_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *adv7511_bridge_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct adv7511 *adv = bridge_to_adv7511(bridge);
 
-	return adv7511_get_edid(adv, connector);
+	return adv7511_edid_read(adv, connector);
 }
 
 static void adv7511_bridge_hpd_notify(struct drm_bridge *bridge,
@@ -977,7 +990,7 @@ static const struct drm_bridge_funcs adv7511_bridge_funcs = {
 	.mode_valid = adv7511_bridge_mode_valid,
 	.attach = adv7511_bridge_attach,
 	.detect = adv7511_bridge_detect,
-	.get_edid = adv7511_bridge_get_edid,
+	.edid_read = adv7511_bridge_edid_read,
 	.hpd_notify = adv7511_bridge_hpd_notify,
 };
 
-- 
2.39.2

[PATCH v2 34/39] drm: bridge: dw_hdmi: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 43 ++++++++++++++---------
 1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 52d91a0df85e..8ce85e973b38 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2454,16 +2454,17 @@ static enum drm_connector_status dw_hdmi_detect(struct dw_hdmi *hdmi)
 	return result;
 }
 
-static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi,
-				     struct drm_connector *connector)
+static const struct drm_edid *dw_hdmi_edid_read(struct dw_hdmi *hdmi,
+						struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
+	const struct edid *edid;
 
 	if (!hdmi->ddc)
 		return NULL;
 
-	edid = drm_get_edid(connector, hdmi->ddc);
-	if (!edid) {
+	drm_edid = drm_edid_read_ddc(connector, hdmi->ddc);
+	if (!drm_edid) {
 		dev_dbg(hdmi->dev, "failed to get edid\n");
 		return NULL;
 	}
@@ -2471,10 +2472,17 @@ static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi,
 	dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
 		edid->width_cm, edid->height_cm);
 
+	/*
+	 * FIXME: This should use connector->display_info.is_hdmi and
+	 * connector->display_info.has_audio from a path that has read the EDID
+	 * and called drm_edid_connector_update().
+	 */
+	edid = drm_edid_raw(drm_edid);
+
 	hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
 	hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
 
-	return edid;
+	return drm_edid;
 }
 
 /* -----------------------------------------------------------------------------
@@ -2493,17 +2501,18 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
 					     connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
-	edid = dw_hdmi_get_edid(hdmi, connector);
-	if (!edid)
+	drm_edid = dw_hdmi_edid_read(hdmi, connector);
+	if (!drm_edid)
 		return 0;
 
-	drm_connector_update_edid_property(connector, edid);
-	cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
-	ret = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid_connector_update(connector, drm_edid);
+	cec_notifier_set_phys_addr(hdmi->cec_notifier,
+				   connector->display_info.source_physical_address);
+	ret = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return ret;
 }
@@ -2980,12 +2989,12 @@ static enum drm_connector_status dw_hdmi_bridge_detect(struct drm_bridge *bridge
 	return dw_hdmi_detect(hdmi);
 }
 
-static struct edid *dw_hdmi_bridge_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *dw_hdmi_bridge_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
-	return dw_hdmi_get_edid(hdmi, connector);
+	return dw_hdmi_edid_read(hdmi, connector);
 }
 
 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
@@ -3002,7 +3011,7 @@ static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
 	.mode_set = dw_hdmi_bridge_mode_set,
 	.mode_valid = dw_hdmi_bridge_mode_valid,
 	.detect = dw_hdmi_bridge_detect,
-	.get_edid = dw_hdmi_bridge_get_edid,
+	.edid_read = dw_hdmi_bridge_edid_read,
 };
 
 /* -----------------------------------------------------------------------------
-- 
2.39.2

Re: [PATCH v2 34/39] drm: bridge: dw_hdmi: switch to ->edid_read callback

[kernel test robot]

Hi Jani,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.7-rc8 next-20240103]
[cannot apply to drm-intel/for-linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jani-Nikula/drm-bridge-add-edid_read-hook-and-drm_bridge_edid_read/20240103-181513
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/a8f71940221fb085b8767f8123f496c9b36b22cc.1704276309.git.jani.nikula%40intel.com
patch subject: [PATCH v2 34/39] drm: bridge: dw_hdmi: switch to ->edid_read callback
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20240104/202401041305.NcTmAmOJ-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 7e186d366d6c7def0543acc255931f617e76dff0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240104/202401041305.NcTmAmOJ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401041305.NcTmAmOJ-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:2473:3: warning: variable 'edid' is uninitialized when used here [-Wuninitialized]
    2473 |                 edid->width_cm, edid->height_cm);
         |                 ^~~~
   include/linux/dev_printk.h:155:39: note: expanded from macro 'dev_dbg'
     155 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                                              ^~~~~~~~~~~
   include/linux/dynamic_debug.h:274:19: note: expanded from macro 'dynamic_dev_dbg'
     274 |                            dev, fmt, ##__VA_ARGS__)
         |                                        ^~~~~~~~~~~
   include/linux/dynamic_debug.h:250:59: note: expanded from macro '_dynamic_func_call'
     250 |         _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
         |                                                                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:248:65: note: expanded from macro '_dynamic_func_call_cls'
     248 |         __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func, ##__VA_ARGS__)
         |                                                                        ^~~~~~~~~~~
   include/linux/dynamic_debug.h:224:15: note: expanded from macro '__dynamic_func_call_cls'
     224 |                 func(&id, ##__VA_ARGS__);                       \
         |                             ^~~~~~~~~~~
   drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:2461:25: note: initialize the variable 'edid' to silence this warning
    2461 |         const struct edid *edid;
         |                                ^
         |                                 = NULL
   1 warning generated.


vim +/edid +2473 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2456  
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2457  static const struct drm_edid *dw_hdmi_edid_read(struct dw_hdmi *hdmi,
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2458  						struct drm_connector *connector)
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2459  {
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2460  	const struct drm_edid *drm_edid;
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2461  	const struct edid *edid;
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2462  
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2463  	if (!hdmi->ddc)
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2464  		return NULL;
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2465  
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2466  	drm_edid = drm_edid_read_ddc(connector, hdmi->ddc);
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2467  	if (!drm_edid) {
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2468  		dev_dbg(hdmi->dev, "failed to get edid\n");
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2469  		return NULL;
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2470  	}
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2471  
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2472  	dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29 @2473  		edid->width_cm, edid->height_cm);
9aaf880ed4ee3c drivers/staging/imx-drm/imx-hdmi.c        Fabio Estevam    2013-11-29  2474  
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2475  	/*
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2476  	 * FIXME: This should use connector->display_info.is_hdmi and
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2477  	 * connector->display_info.has_audio from a path that has read the EDID
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2478  	 * and called drm_edid_connector_update().
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2479  	 */
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2480  	edid = drm_edid_raw(drm_edid);
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2481  
05b1342f5014b7 drivers/gpu/drm/bridge/dw_hdmi.c          Russell King     2015-07-21  2482  	hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
f709ec07e38a71 drivers/gpu/drm/bridge/dw_hdmi.c          Russell King     2015-07-21  2483  	hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2484  
fcb55de55cf341 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Jani Nikula      2024-01-03  2485  	return drm_edid;
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2486  }
ec971aaa6775cf drivers/gpu/drm/bridge/synopsys/dw-hdmi.c Laurent Pinchart 2020-05-26  2487  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2 34/39] drm: bridge: dw_hdmi: switch to ->edid_read callback

[Jani Nikula]

On Thu, 04 Jan 2024, kernel test robot <lkp@intel.com> wrote:
> Hi Jani,
>
> kernel test robot noticed the following build warnings:
>
> [auto build test WARNING on drm-misc/drm-misc-next]
> [also build test WARNING on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.7-rc8 next-20240103]
> [cannot apply to drm-intel/for-linux-next]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Jani-Nikula/drm-bridge-add-edid_read-hook-and-drm_bridge_edid_read/20240103-181513
> base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
> patch link:    https://lore.kernel.org/r/a8f71940221fb085b8767f8123f496c9b36b22cc.1704276309.git.jani.nikula%40intel.com
> patch subject: [PATCH v2 34/39] drm: bridge: dw_hdmi: switch to ->edid_read callback
> config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20240104/202401041305.NcTmAmOJ-lkp@intel.com/config)
> compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 7e186d366d6c7def0543acc255931f617e76dff0)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240104/202401041305.NcTmAmOJ-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202401041305.NcTmAmOJ-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
>>> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:2473:3: warning: variable 'edid' is uninitialized when used here [-Wuninitialized]
>     2473 |                 edid->width_cm, edid->height_cm);
>          |                 ^~~~
>    include/linux/dev_printk.h:155:39: note: expanded from macro 'dev_dbg'
>      155 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
>          |                                              ^~~~~~~~~~~
>    include/linux/dynamic_debug.h:274:19: note: expanded from macro 'dynamic_dev_dbg'
>      274 |                            dev, fmt, ##__VA_ARGS__)
>          |                                        ^~~~~~~~~~~
>    include/linux/dynamic_debug.h:250:59: note: expanded from macro '_dynamic_func_call'
>      250 |         _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
>          |                                                                  ^~~~~~~~~~~
>    include/linux/dynamic_debug.h:248:65: note: expanded from macro '_dynamic_func_call_cls'
>      248 |         __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func, ##__VA_ARGS__)
>          |                                                                        ^~~~~~~~~~~
>    include/linux/dynamic_debug.h:224:15: note: expanded from macro '__dynamic_func_call_cls'
>      224 |                 func(&id, ##__VA_ARGS__);                       \
>          |                             ^~~~~~~~~~~
>    drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:2461:25: note: initialize the variable 'edid' to silence this warning
>     2461 |         const struct edid *edid;
>          |                                ^
>          |                                 = NULL
>    1 warning generated.

This is a valid report, fixed locally.

BR,
Jani.


-- 
Jani Nikula, Intel

[PATCH v2] drm/bridge: nxp-ptn3460: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

v2: Fix -Wsometimes-uninitialized (kernel test robot)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/nxp-ptn3460.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index 7c0076e49953..ed93fd4c3265 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -154,10 +154,11 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 }
 
 
-static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
-				     struct drm_connector *connector)
+static const struct drm_edid *ptn3460_edid_read(struct drm_bridge *bridge,
+						struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+	const struct drm_edid *drm_edid = NULL;
 	bool power_off;
 	u8 *edid;
 	int ret;
@@ -175,27 +176,28 @@ static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
 				 EDID_LENGTH);
 	if (ret) {
 		kfree(edid);
-		edid = NULL;
 		goto out;
 	}
 
+	drm_edid = drm_edid_alloc(edid, EDID_LENGTH);
+
 out:
 	if (power_off)
 		ptn3460_disable(&ptn_bridge->bridge);
 
-	return (struct edid *)edid;
+	return drm_edid;
 }
 
 static int ptn3460_connector_get_modes(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int num_modes;
 
-	edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);
-	drm_connector_update_edid_property(connector, edid);
-	num_modes = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid = ptn3460_edid_read(&ptn_bridge->bridge, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	num_modes = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return num_modes;
 }
@@ -254,7 +256,7 @@ static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.pre_enable = ptn3460_pre_enable,
 	.disable = ptn3460_disable,
 	.attach = ptn3460_bridge_attach,
-	.get_edid = ptn3460_get_edid,
+	.edid_read = ptn3460_edid_read,
 };
 
 static int ptn3460_probe(struct i2c_client *client)
-- 
2.39.2

Re: [PATCH v2] drm/bridge: nxp-ptn3460: switch to ->edid_read callback

[Jani Nikula]

On Tue, 09 Jan 2024, Jani Nikula <jani.nikula@intel.com> wrote:
> Prefer using the struct drm_edid based callback and functions.
>
> v2: Fix -Wsometimes-uninitialized (kernel test robot)
>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>

I fumbled and sent the v2 in reply to the wrong patch, and it'll
probably confuse all the build bots out there.

Anyway, I'd prefer not resending the entire series until there's been at
least some meaningful review.

BR,
Jani.

-- 
Jani Nikula, Intel

[PATCH v2] drm: bridge: dw_hdmi: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

v2: Fix -Wuninitialized (kernel test robot)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 43 ++++++++++++++---------
 1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 52d91a0df85e..8eea3f59f585 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2454,27 +2454,35 @@ static enum drm_connector_status dw_hdmi_detect(struct dw_hdmi *hdmi)
 	return result;
 }
 
-static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi,
-				     struct drm_connector *connector)
+static const struct drm_edid *dw_hdmi_edid_read(struct dw_hdmi *hdmi,
+						struct drm_connector *connector)
 {
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
+	const struct edid *edid;
 
 	if (!hdmi->ddc)
 		return NULL;
 
-	edid = drm_get_edid(connector, hdmi->ddc);
-	if (!edid) {
+	drm_edid = drm_edid_read_ddc(connector, hdmi->ddc);
+	if (!drm_edid) {
 		dev_dbg(hdmi->dev, "failed to get edid\n");
 		return NULL;
 	}
 
+	/*
+	 * FIXME: This should use connector->display_info.is_hdmi and
+	 * connector->display_info.has_audio from a path that has read the EDID
+	 * and called drm_edid_connector_update().
+	 */
+	edid = drm_edid_raw(drm_edid);
+
 	dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
 		edid->width_cm, edid->height_cm);
 
 	hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
 	hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
 
-	return edid;
+	return drm_edid;
 }
 
 /* -----------------------------------------------------------------------------
@@ -2493,17 +2501,18 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
 					     connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
-	edid = dw_hdmi_get_edid(hdmi, connector);
-	if (!edid)
+	drm_edid = dw_hdmi_edid_read(hdmi, connector);
+	if (!drm_edid)
 		return 0;
 
-	drm_connector_update_edid_property(connector, edid);
-	cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
-	ret = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid_connector_update(connector, drm_edid);
+	cec_notifier_set_phys_addr(hdmi->cec_notifier,
+				   connector->display_info.source_physical_address);
+	ret = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return ret;
 }
@@ -2980,12 +2989,12 @@ static enum drm_connector_status dw_hdmi_bridge_detect(struct drm_bridge *bridge
 	return dw_hdmi_detect(hdmi);
 }
 
-static struct edid *dw_hdmi_bridge_get_edid(struct drm_bridge *bridge,
-					    struct drm_connector *connector)
+static const struct drm_edid *dw_hdmi_bridge_edid_read(struct drm_bridge *bridge,
+						       struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
-	return dw_hdmi_get_edid(hdmi, connector);
+	return dw_hdmi_edid_read(hdmi, connector);
 }
 
 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
@@ -3002,7 +3011,7 @@ static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
 	.mode_set = dw_hdmi_bridge_mode_set,
 	.mode_valid = dw_hdmi_bridge_mode_valid,
 	.detect = dw_hdmi_bridge_detect,
-	.get_edid = dw_hdmi_bridge_get_edid,
+	.edid_read = dw_hdmi_bridge_edid_read,
 };
 
 /* -----------------------------------------------------------------------------
-- 
2.39.2

[PATCH v2 35/39] drm: bridge: dw_hdmi: clear the EDID property and CEC address on failures

[Jani Nikula]

If EDID read fails, clear the EDID property and CEC address.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 8ce85e973b38..654f35ea516d 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2505,8 +2505,6 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 	int ret;
 
 	drm_edid = dw_hdmi_edid_read(hdmi, connector);
-	if (!drm_edid)
-		return 0;
 
 	drm_edid_connector_update(connector, drm_edid);
 	cec_notifier_set_phys_addr(hdmi->cec_notifier,
-- 
2.39.2

[PATCH v2 36/39] drm/bridge: tc358767: update the EDID property

[Jani Nikula]

The EDID property should be updated between reading the EDID and adding
the modes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/tc358767.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index eb0d82a91cb9..da2aec5110c2 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1674,6 +1674,7 @@ static int tc_connector_get_modes(struct drm_connector *connector)
 	}
 
 	edid = tc_get_edid(&tc->bridge, connector);
+	drm_connector_update_edid_property(connector, edid);
 	num_modes = drm_add_edid_modes(connector, edid);
 	kfree(edid);
 
-- 
2.39.2

[PATCH v2 37/39] drm/bridge: tc358767: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/tc358767.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index da2aec5110c2..975cec698452 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1646,19 +1646,19 @@ static void tc_bridge_mode_set(struct drm_bridge *bridge,
 	drm_mode_copy(&tc->mode, mode);
 }
 
-static struct edid *tc_get_edid(struct drm_bridge *bridge,
-				struct drm_connector *connector)
+static const struct drm_edid *tc_edid_read(struct drm_bridge *bridge,
+					   struct drm_connector *connector)
 {
 	struct tc_data *tc = bridge_to_tc(bridge);
 
-	return drm_get_edid(connector, &tc->aux.ddc);
+	return drm_edid_read_ddc(connector, &tc->aux.ddc);
 }
 
 static int tc_connector_get_modes(struct drm_connector *connector)
 {
 	struct tc_data *tc = connector_to_tc(connector);
 	int num_modes;
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int ret;
 
 	ret = tc_get_display_props(tc);
@@ -1673,10 +1673,10 @@ static int tc_connector_get_modes(struct drm_connector *connector)
 			return num_modes;
 	}
 
-	edid = tc_get_edid(&tc->bridge, connector);
-	drm_connector_update_edid_property(connector, edid);
-	num_modes = drm_add_edid_modes(connector, edid);
-	kfree(edid);
+	drm_edid = tc_edid_read(&tc->bridge, connector);
+	drm_edid_connector_update(connector, drm_edid);
+	num_modes = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
 
 	return num_modes;
 }
@@ -1845,7 +1845,7 @@ static const struct drm_bridge_funcs tc_edp_bridge_funcs = {
 	.atomic_enable = tc_edp_bridge_atomic_enable,
 	.atomic_disable = tc_edp_bridge_atomic_disable,
 	.detect = tc_bridge_detect,
-	.get_edid = tc_get_edid,
+	.edid_read = tc_edid_read,
 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
 	.atomic_reset = drm_atomic_helper_bridge_reset,
-- 
2.39.2

[PATCH v2 38/39] drm/bridge: ti-sn65dsi86: switch to ->edid_read callback

[Jani Nikula]

Prefer using the struct drm_edid based callback and functions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 62cc3893dca5..61dc6f063fb4 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1207,19 +1207,19 @@ static enum drm_connector_status ti_sn_bridge_detect(struct drm_bridge *bridge)
 					 : connector_status_disconnected;
 }
 
-static struct edid *ti_sn_bridge_get_edid(struct drm_bridge *bridge,
-					  struct drm_connector *connector)
+static const struct drm_edid *ti_sn_bridge_edid_read(struct drm_bridge *bridge,
+						     struct drm_connector *connector)
 {
 	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
 
-	return drm_get_edid(connector, &pdata->aux.ddc);
+	return drm_edid_read_ddc(connector, &pdata->aux.ddc);
 }
 
 static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
 	.attach = ti_sn_bridge_attach,
 	.detach = ti_sn_bridge_detach,
 	.mode_valid = ti_sn_bridge_mode_valid,
-	.get_edid = ti_sn_bridge_get_edid,
+	.edid_read = ti_sn_bridge_edid_read,
 	.detect = ti_sn_bridge_detect,
 	.atomic_pre_enable = ti_sn_bridge_atomic_pre_enable,
 	.atomic_enable = ti_sn_bridge_atomic_enable,
-- 
2.39.2

[PATCH v2 39/39] drm/bridge: remove ->get_edid callback

[Jani Nikula]

There are no more users of the ->get_edid callback left. They've all
been converted to ->edid_read. Remove the callback, and the fallback in
drm_bridge_edid_read().

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_bridge.c | 19 -------------------
 include/drm/drm_bridge.h     | 30 ------------------------------
 2 files changed, 49 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index a3065d4aa3d6..521a71c61b16 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -1216,9 +1216,6 @@ EXPORT_SYMBOL_GPL(drm_bridge_get_modes);
  * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.edid_read to get
  * the EDID and return it. Otherwise return NULL.
  *
- * If &drm_bridge_funcs.edid_read is not set, fall back to using
- * &drm_bridge_funcs.get_edid and wrapping it in struct drm_edid.
- *
  * RETURNS:
  * The retrieved EDID on success, or NULL otherwise.
  */
@@ -1228,22 +1225,6 @@ const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
 	if (!(bridge->ops & DRM_BRIDGE_OP_EDID))
 		return NULL;
 
-	/* Transitional: Fall back to ->get_edid. */
-	if (!bridge->funcs->edid_read) {
-		const struct drm_edid *drm_edid;
-		struct edid *edid;
-
-		edid = bridge->funcs->get_edid(bridge, connector);
-		if (!edid)
-			return NULL;
-
-		drm_edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH);
-
-		kfree(edid);
-
-		return drm_edid;
-	}
-
 	return bridge->funcs->edid_read(bridge, connector);
 }
 EXPORT_SYMBOL_GPL(drm_bridge_edid_read);
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index ee12f829aaf7..7293c02e17c5 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -588,36 +588,6 @@ struct drm_bridge_funcs {
 	const struct drm_edid *(*edid_read)(struct drm_bridge *bridge,
 					    struct drm_connector *connector);
 
-	/**
-	 * @get_edid:
-	 *
-	 * Read and parse the EDID data of the connected display.
-	 *
-	 * The @get_edid callback is the preferred way of reporting mode
-	 * information for a display connected to the bridge output. Bridges
-	 * that support reading EDID shall implement this callback and leave
-	 * the @get_modes callback unimplemented.
-	 *
-	 * The caller of this operation shall first verify the output
-	 * connection status and refrain from reading EDID from a disconnected
-	 * output.
-	 *
-	 * This callback is optional. Bridges that implement it shall set the
-	 * DRM_BRIDGE_OP_EDID flag in their &drm_bridge->ops.
-	 *
-	 * The connector parameter shall be used for the sole purpose of EDID
-	 * retrieval and parsing, and shall not be stored internally by bridge
-	 * drivers for future usage.
-	 *
-	 * RETURNS:
-	 *
-	 * An edid structure newly allocated with kmalloc() (or similar) on
-	 * success, or NULL otherwise. The caller is responsible for freeing
-	 * the returned edid structure with kfree().
-	 */
-	struct edid *(*get_edid)(struct drm_bridge *bridge,
-				 struct drm_connector *connector);
-
 	/**
 	 * @hpd_notify:
 	 *
-- 
2.39.2

Re: [PATCH v2 00/39] drm/bridge: switch to struct drm_edid

[Jani Nikula]

On Wed, 03 Jan 2024, Jani Nikula <jani.nikula@intel.com> wrote:
> Convert all of drm/bridge to the new struct drm_edid
> infrastructure. It's safer than struct edid, because it contains meta
> information about the allocated size of the EDID, instead of relying on
> the size (number of extensions) originating from outside of the kernel.
>
> Among all of drm, I think bridge has the most uses of struct edid that
> do not originate from the drm_get_edid() family of functions, which
> means the validity checks are somewhat inconsistent, and having the meta
> information is more crucial.
>
> Only build tested. I'm sure there should be more Cc's especially in the
> patches towards the end of the series, but I just wanted to get the
> series out the door now.

PS. It's also available at
https://gitlab.freedesktop.org/jani/linux/-/commits/drm-edid-bridge


-- 
Jani Nikula, Intel