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Message-Id: <20231031-kms-hdmi-connector-state-v3-5-328b0fae43a7@kernel.org>
Date: Tue, 31 Oct 2023 17:48:18 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Emma Anholt <emma@...olt.net>,
Jonathan Corbet <corbet@....net>,
Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>
Cc: Hans Verkuil <hverkuil@...all.nl>, dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
Maxime Ripard <mripard@...nel.org>
Subject: [PATCH RFC v3 05/37] drm/connector: hdmi: Add output BPC to the
connector state
We'll add automatic selection of the output BPC in a following patch,
but let's add it to the HDMI connector state already.
Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
drivers/gpu/drm/drm_atomic.c | 1 +
drivers/gpu/drm/drm_atomic_state_helper.c | 8 +++++++-
drivers/gpu/drm/drm_connector.c | 20 +++++++++++++++++++-
include/drm/drm_connector.h | 13 ++++++++++++-
4 files changed, 39 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 55cb117cd49a..51aac1b2aaaf 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1147,6 +1147,7 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
drm_printf(p, "\tbroadcast_rgb=%s\n",
drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb));
drm_printf(p, "\tis_full_range=%c\n", state->hdmi.is_full_range ? 'y' : 'n');
+ drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc);
}
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index c3f124af64dc..406ba358aa14 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -570,6 +570,11 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_tv_reset);
void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
struct drm_connector_state *new_state)
{
+ unsigned int max_bpc = connector->max_bpc;
+
+ new_state->max_bpc = max_bpc;
+ new_state->max_requested_bpc = max_bpc;
+ new_state->hdmi.output_bpc = max_bpc;
new_state->hdmi.broadcast_rgb = DRM_HDMI_BROADCAST_RGB_AUTO;
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_hdmi_reset);
@@ -686,7 +691,8 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
new_state->hdmi.is_full_range = hdmi_is_full_range(connector, new_state);
- if (old_state->hdmi.broadcast_rgb != new_state->hdmi.broadcast_rgb) {
+ if (old_state->hdmi.broadcast_rgb != new_state->hdmi.broadcast_rgb ||
+ old_state->hdmi.output_bpc != new_state->hdmi.output_bpc) {
struct drm_crtc *crtc = new_state->crtc;
struct drm_crtc_state *crtc_state;
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 36d728e811ae..508d1c667732 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -459,6 +459,7 @@ EXPORT_SYMBOL(drmm_connector_init);
* @funcs: callbacks for this connector
* @connector_type: user visible type of the connector
* @ddc: optional pointer to the associated ddc adapter
+ * @max_bpc: Maximum bits per char the HDMI connector supports
*
* Initialises a preallocated HDMI connector. Connectors can be
* subclassed as part of driver connector objects.
@@ -475,7 +476,8 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
struct drm_connector *connector,
const struct drm_connector_funcs *funcs,
int connector_type,
- struct i2c_adapter *ddc)
+ struct i2c_adapter *ddc,
+ unsigned int max_bpc)
{
int ret;
@@ -487,6 +489,22 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
if (ret)
return ret;
+ if (max_bpc) {
+ if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12))
+ return -EINVAL;
+
+ /*
+ * drm_connector_attach_max_bpc_property() requires the
+ * connector to have a state.
+ */
+ if (connector->funcs->reset)
+ connector->funcs->reset(connector);
+
+ drm_connector_attach_hdr_output_metadata_property(connector);
+ drm_connector_attach_max_bpc_property(connector, 8, max_bpc);
+ connector->max_bpc = max_bpc;
+ }
+
return 0;
}
EXPORT_SYMBOL(drmm_connector_hdmi_init);
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index fc1fa754a40d..2d664b6ac0a6 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1059,6 +1059,11 @@ struct drm_connector_state {
* RGB Quantization Range or not?
*/
bool is_full_range;
+
+ /**
+ * @output_bpc: Bits per color channel to output.
+ */
+ unsigned int output_bpc;
} hdmi;
};
@@ -1703,6 +1708,11 @@ struct drm_connector {
*/
struct drm_property_blob *path_blob_ptr;
+ /**
+ * @max_bpc: Maximum bits per color channel the connector supports.
+ */
+ unsigned int max_bpc;
+
/**
* @max_bpc_property: Default connector property for the max bpc to be
* driven out of the connector.
@@ -1942,7 +1952,8 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
struct drm_connector *connector,
const struct drm_connector_funcs *funcs,
int connector_type,
- struct i2c_adapter *ddc);
+ struct i2c_adapter *ddc,
+ unsigned int max_bpc);
void drm_connector_attach_edid_property(struct drm_connector *connector);
int drm_connector_register(struct drm_connector *connector);
void drm_connector_unregister(struct drm_connector *connector);
--
2.41.0
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