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Message-Id: <20210413121104.375789-2-maxime@cerno.tech>
Date: Tue, 13 Apr 2021 14:11:01 +0200
From: Maxime Ripard <maxime@...no.tech>
To: dri-devel@...ts.freedesktop.org,
Daniel Vetter <daniel.vetter@...el.com>,
David Airlie <airlied@...ux.ie>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
Maxime Ripard <maxime@...no.tech>
Cc: Christian König <christian.koenig@....com>,
Andrzej Hajda <a.hajda@...sung.com>,
Maxime Ripard <mripard@...nel.org>,
Eric Anholt <eric@...olt.net>, Leo Li <sunpeng.li@....com>,
intel-gfx@...ts.freedesktop.org,
Jani Nikula <jani.nikula@...ux.intel.com>,
Dave Stevenson <dave.stevenson@...pberrypi.com>,
Phil Elwell <phil@...pberrypi.com>,
Tim Gover <tim.gover@...pberrypi.com>,
Dom Cobley <dom@...pberrypi.com>,
Jonas Karlman <jonas@...boo.se>,
Neil Armstrong <narmstrong@...libre.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Robert Foss <robert.foss@...aro.org>,
Jernej Skrabec <jernej.skrabec@...l.net>,
amd-gfx@...ts.freedesktop.org,
Harry Wentland <harry.wentland@....com>,
Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
Alex Deucher <alexander.deucher@....com>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Subject: [PATCH v2 2/5] drm/connector: Add helper to compare HDR metadata
All the drivers that support the HDR metadata property have a similar
function to compare the metadata from one connector state to the next,
and force a mode change if they differ.
All these functions run pretty much the same code, so let's turn it into
an helper that can be shared across those drivers.
Reviewed-by: Harry Wentland <harry.wentland@....com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@...l.net>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
Changes from v1:
- Rebased on latest drm-misc-next tag
- Added the tags
- Fix build breakage on amdgpu
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 23 ++-------------
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 17 +----------
drivers/gpu/drm/drm_connector.c | 28 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_atomic.c | 13 +--------
include/drm/drm_connector.h | 2 ++
5 files changed, 34 insertions(+), 49 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 1e22ce718010..ed1972fb531d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5967,25 +5967,6 @@ static int fill_hdr_info_packet(const struct drm_connector_state *state,
return 0;
}
-static bool
-is_hdr_metadata_different(const struct drm_connector_state *old_state,
- const struct drm_connector_state *new_state)
-{
- struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
- struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
-
- if (old_blob != new_blob) {
- if (old_blob && new_blob &&
- old_blob->length == new_blob->length)
- return memcmp(old_blob->data, new_blob->data,
- old_blob->length);
-
- return true;
- }
-
- return false;
-}
-
static int
amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
struct drm_atomic_state *state)
@@ -6003,7 +5984,7 @@ amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
if (!crtc)
return 0;
- if (is_hdr_metadata_different(old_con_state, new_con_state)) {
+ if (!drm_connector_atomic_hdr_metadata_equal(old_con_state, new_con_state)) {
struct dc_info_packet hdr_infopacket;
ret = fill_hdr_info_packet(new_con_state, &hdr_infopacket);
@@ -8357,7 +8338,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
dm_old_crtc_state->abm_level;
hdr_changed =
- is_hdr_metadata_different(old_con_state, new_con_state);
+ !drm_connector_atomic_hdr_metadata_equal(old_con_state, new_con_state);
if (!scaling_changed && !abm_changed && !hdr_changed)
continue;
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index f24bbb840dbf..f871e33c2fc9 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2395,21 +2395,6 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
return ret;
}
-static bool hdr_metadata_equal(const struct drm_connector_state *old_state,
- const struct drm_connector_state *new_state)
-{
- struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
- struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
-
- if (!old_blob || !new_blob)
- return old_blob == new_blob;
-
- if (old_blob->length != new_blob->length)
- return false;
-
- return !memcmp(old_blob->data, new_blob->data, old_blob->length);
-}
-
static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
struct drm_atomic_state *state)
{
@@ -2423,7 +2408,7 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
if (!crtc)
return 0;
- if (!hdr_metadata_equal(old_state, new_state)) {
+ if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
crtc_state = drm_atomic_get_crtc_state(state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index a4aa2d87af35..b13021b1b128 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2171,6 +2171,34 @@ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *conn
}
EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
+/**
+ * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed
+ * @old_state: old connector state to compare
+ * @new_state: new connector state to compare
+ *
+ * This is used by HDR-enabled drivers to test whether the HDR metadata
+ * have changed between two different connector state (and thus probably
+ * requires a full blown mode change).
+ *
+ * Returns:
+ * True if the metadata are equal, False otherwise
+ */
+bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
+ struct drm_connector_state *new_state)
+{
+ struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
+ struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
+
+ if (!old_blob || !new_blob)
+ return old_blob == new_blob;
+
+ if (old_blob->length != new_blob->length)
+ return false;
+
+ return !memcmp(old_blob->data, new_blob->data, old_blob->length);
+}
+EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal);
+
/**
* drm_connector_set_vrr_capable_property - sets the variable refresh rate
* capable property for a connector
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index e00fdc47c0eb..efec9454af5a 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -109,16 +109,6 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
return -EINVAL;
}
-static bool blob_equal(const struct drm_property_blob *a,
- const struct drm_property_blob *b)
-{
- if (a && b)
- return a->length == b->length &&
- !memcmp(a->data, b->data, a->length);
-
- return !a == !b;
-}
-
int intel_digital_connector_atomic_check(struct drm_connector *conn,
struct drm_atomic_state *state)
{
@@ -149,8 +139,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
new_conn_state->base.content_type != old_conn_state->base.content_type ||
new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
- !blob_equal(new_conn_state->base.hdr_output_metadata,
- old_conn_state->base.hdr_output_metadata))
+ !drm_connector_atomic_hdr_metadata_equal(old_state, new_state))
crtc_state->mode_changed = true;
return 0;
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 32172dab8427..1f51d73ca715 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1672,6 +1672,8 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
int drm_connector_attach_vrr_capable_property(
struct drm_connector *connector);
int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector);
+bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
+ struct drm_connector_state *new_state);
int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
--
2.30.2
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