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From 5278eeece5b7b66019cf9c1a833c815cff9819ec Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Fri, 19 Mar 2021 13:05:53 +0100
Subject: [PATCH] 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.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 21 +-------------
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, 33 insertions(+), 48 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5511,25 +5511,6 @@ static int fill_hdr_info_packet(const st
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)
@@ -5545,7 +5526,7 @@ amdgpu_dm_connector_atomic_check(struct
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);
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2403,21 +2403,6 @@ static int dw_hdmi_connector_get_modes(s
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)
{
@@ -2431,7 +2416,7 @@ static int dw_hdmi_connector_atomic_chec
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);
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2186,6 +2186,34 @@ int drm_connector_attach_hdr_output_meta
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
* @connector: drm connector
--- 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_p
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)
{
@@ -150,8 +140,7 @@ int intel_digital_connector_atomic_check
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;
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1648,6 +1648,8 @@ int drm_connector_attach_scaling_mode_pr
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);
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