* [PATCH] drm/bridge: it6505: handle HDCP request
@ 2022-11-01 11:20 Hsin-Yi Wang
2022-11-14 8:06 ` Hsin-Yi Wang
0 siblings, 1 reply; 2+ messages in thread
From: Hsin-Yi Wang @ 2022-11-01 11:20 UTC (permalink / raw)
To: Robert Foss, Allen Chen
Cc: Andrzej Hajda, Neil Armstrong, Pin-yen Lin, Laurent Pinchart,
AngeloGioacchino Del Regno, Hermes Wu, Jonas Karlman,
Jernej Skrabec, David Airlie, Daniel Vetter, dri-devel,
linux-kernel
it6505 supports HDCP 1.3, but current implementation lacks the update of
HDCP status through drm_hdcp_update_content_protection(). it6505 default
enables the HDCP. If user set it to undesired then the driver will stop
HDCP.
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
drivers/gpu/drm/bridge/ite-it6505.c | 54 +++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index b929fc766e243..65c6f932cae25 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -423,6 +423,7 @@ struct it6505 {
struct extcon_dev *extcon;
struct work_struct extcon_wq;
int extcon_state;
+ struct drm_connector *connector;
enum drm_connector_status connector_status;
enum link_train_status link_state;
struct work_struct link_works;
@@ -2399,6 +2400,14 @@ static void it6505_irq_hdcp_done(struct it6505 *it6505)
DRM_DEV_DEBUG_DRIVER(dev, "hdcp done interrupt");
it6505->hdcp_status = HDCP_AUTH_DONE;
+ if (it6505->connector) {
+ struct drm_device *drm_dev = it6505->connector->dev;
+
+ drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL);
+ drm_hdcp_update_content_protection(it6505->connector,
+ DRM_MODE_CONTENT_PROTECTION_ENABLED);
+ drm_modeset_unlock(&drm_dev->mode_config.connection_mutex);
+ }
it6505_show_hdcp_info(it6505);
}
@@ -2931,6 +2940,7 @@ static void it6505_bridge_atomic_enable(struct drm_bridge *bridge,
if (WARN_ON(!connector))
return;
+ it6505->connector = connector;
conn_state = drm_atomic_get_new_connector_state(state, connector);
if (WARN_ON(!conn_state))
@@ -2974,6 +2984,7 @@ static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
DRM_DEV_DEBUG_DRIVER(dev, "start");
+ it6505->connector = NULL;
if (it6505->powered) {
it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
DP_SET_POWER_D3);
@@ -3028,6 +3039,48 @@ static struct edid *it6505_bridge_get_edid(struct drm_bridge *bridge,
return edid;
}
+static int it6505_connector_atomic_check(struct it6505 *it6505,
+ struct drm_connector_state *state)
+{
+ struct device *dev = &it6505->client->dev;
+ int cp = state->content_protection;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "hdcp connector state:%d, curr hdcp state:%d",
+ cp, it6505->hdcp_status);
+
+ if (!it6505->hdcp_desired) {
+ DRM_DEV_DEBUG_DRIVER(dev, "sink not support hdcp");
+ return 0;
+ }
+
+ if (it6505->hdcp_status == HDCP_AUTH_GOING)
+ return -EINVAL;
+
+ if (cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+ if (it6505->hdcp_status == HDCP_AUTH_DONE)
+ it6505_stop_hdcp(it6505);
+ } else if (cp == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
+ if (it6505->hdcp_status == HDCP_AUTH_IDLE &&
+ it6505->link_state == LINK_OK)
+ it6505_start_hdcp(it6505);
+ } else {
+ DRM_DEV_DEBUG_DRIVER(dev, "invalid to set hdcp enabled");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int it6505_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+
+ return it6505_connector_atomic_check(it6505, conn_state);
+}
+
static const struct drm_bridge_funcs it6505_bridge_funcs = {
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
@@ -3035,6 +3088,7 @@ static const struct drm_bridge_funcs it6505_bridge_funcs = {
.attach = it6505_bridge_attach,
.detach = it6505_bridge_detach,
.mode_valid = it6505_bridge_mode_valid,
+ .atomic_check = it6505_bridge_atomic_check,
.atomic_enable = it6505_bridge_atomic_enable,
.atomic_disable = it6505_bridge_atomic_disable,
.atomic_pre_enable = it6505_bridge_atomic_pre_enable,
--
2.38.0.135.g90850a2211-goog
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/bridge: it6505: handle HDCP request
2022-11-01 11:20 [PATCH] drm/bridge: it6505: handle HDCP request Hsin-Yi Wang
@ 2022-11-14 8:06 ` Hsin-Yi Wang
0 siblings, 0 replies; 2+ messages in thread
From: Hsin-Yi Wang @ 2022-11-14 8:06 UTC (permalink / raw)
To: Robert Foss, Allen Chen
Cc: Andrzej Hajda, Neil Armstrong, Pin-yen Lin, Laurent Pinchart,
AngeloGioacchino Del Regno, Hermes Wu, Jonas Karlman,
Jernej Skrabec, David Airlie, Daniel Vetter, dri-devel,
linux-kernel
On Tue, Nov 1, 2022 at 7:20 PM Hsin-Yi Wang <hsinyi@chromium.org> wrote:
>
> it6505 supports HDCP 1.3, but current implementation lacks the update of
> HDCP status through drm_hdcp_update_content_protection(). it6505 default
> enables the HDCP. If user set it to undesired then the driver will stop
> HDCP.
>
> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
> ---
Move this patch into the series to register HDCP property:
https://lore.kernel.org/lkml/20221114080405.2426999-1-hsinyi@chromium.org/
> drivers/gpu/drm/bridge/ite-it6505.c | 54 +++++++++++++++++++++++++++++
> 1 file changed, 54 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
> index b929fc766e243..65c6f932cae25 100644
> --- a/drivers/gpu/drm/bridge/ite-it6505.c
> +++ b/drivers/gpu/drm/bridge/ite-it6505.c
> @@ -423,6 +423,7 @@ struct it6505 {
> struct extcon_dev *extcon;
> struct work_struct extcon_wq;
> int extcon_state;
> + struct drm_connector *connector;
> enum drm_connector_status connector_status;
> enum link_train_status link_state;
> struct work_struct link_works;
> @@ -2399,6 +2400,14 @@ static void it6505_irq_hdcp_done(struct it6505 *it6505)
>
> DRM_DEV_DEBUG_DRIVER(dev, "hdcp done interrupt");
> it6505->hdcp_status = HDCP_AUTH_DONE;
> + if (it6505->connector) {
> + struct drm_device *drm_dev = it6505->connector->dev;
> +
> + drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL);
> + drm_hdcp_update_content_protection(it6505->connector,
> + DRM_MODE_CONTENT_PROTECTION_ENABLED);
> + drm_modeset_unlock(&drm_dev->mode_config.connection_mutex);
> + }
> it6505_show_hdcp_info(it6505);
> }
>
> @@ -2931,6 +2940,7 @@ static void it6505_bridge_atomic_enable(struct drm_bridge *bridge,
> if (WARN_ON(!connector))
> return;
>
> + it6505->connector = connector;
> conn_state = drm_atomic_get_new_connector_state(state, connector);
>
> if (WARN_ON(!conn_state))
> @@ -2974,6 +2984,7 @@ static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
>
> DRM_DEV_DEBUG_DRIVER(dev, "start");
>
> + it6505->connector = NULL;
> if (it6505->powered) {
> it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
> DP_SET_POWER_D3);
> @@ -3028,6 +3039,48 @@ static struct edid *it6505_bridge_get_edid(struct drm_bridge *bridge,
> return edid;
> }
>
> +static int it6505_connector_atomic_check(struct it6505 *it6505,
> + struct drm_connector_state *state)
> +{
> + struct device *dev = &it6505->client->dev;
> + int cp = state->content_protection;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "hdcp connector state:%d, curr hdcp state:%d",
> + cp, it6505->hdcp_status);
> +
> + if (!it6505->hdcp_desired) {
> + DRM_DEV_DEBUG_DRIVER(dev, "sink not support hdcp");
> + return 0;
> + }
> +
> + if (it6505->hdcp_status == HDCP_AUTH_GOING)
> + return -EINVAL;
> +
> + if (cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> + if (it6505->hdcp_status == HDCP_AUTH_DONE)
> + it6505_stop_hdcp(it6505);
> + } else if (cp == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
> + if (it6505->hdcp_status == HDCP_AUTH_IDLE &&
> + it6505->link_state == LINK_OK)
> + it6505_start_hdcp(it6505);
> + } else {
> + DRM_DEV_DEBUG_DRIVER(dev, "invalid to set hdcp enabled");
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int it6505_bridge_atomic_check(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct it6505 *it6505 = bridge_to_it6505(bridge);
> +
> + return it6505_connector_atomic_check(it6505, conn_state);
> +}
> +
> static const struct drm_bridge_funcs it6505_bridge_funcs = {
> .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> @@ -3035,6 +3088,7 @@ static const struct drm_bridge_funcs it6505_bridge_funcs = {
> .attach = it6505_bridge_attach,
> .detach = it6505_bridge_detach,
> .mode_valid = it6505_bridge_mode_valid,
> + .atomic_check = it6505_bridge_atomic_check,
> .atomic_enable = it6505_bridge_atomic_enable,
> .atomic_disable = it6505_bridge_atomic_disable,
> .atomic_pre_enable = it6505_bridge_atomic_pre_enable,
> --
> 2.38.0.135.g90850a2211-goog
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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