From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/drivers/gpu/drm/drm_simple_kms_helper.c | 70 ++++++++++++++++++++++++++++------
1 files changed, 57 insertions(+), 13 deletions(-)
diff --git a/kernel/drivers/gpu/drm/drm_simple_kms_helper.c b/kernel/drivers/gpu/drm/drm_simple_kms_helper.c
index 51fa978..7494669 100644
--- a/kernel/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/kernel/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -1,19 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 Noralf Trønnes
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
*/
-#include <drm/drmP.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc_helper.h>
+#include <drm/drm_bridge.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
-#include <linux/slab.h>
/**
* DOC: overview
@@ -28,11 +26,50 @@
* entity. Some flexibility for code reuse is provided through a separately
* allocated &drm_connector object and supporting optional &drm_bridge
* encoder drivers.
+ *
+ * Many drivers require only a very simple encoder that fulfills the minimum
+ * requirements of the display pipeline and does not add additional
+ * functionality. The function drm_simple_encoder_init() provides an
+ * implementation of such an encoder.
*/
-static const struct drm_encoder_funcs drm_simple_kms_encoder_funcs = {
+static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
.destroy = drm_encoder_cleanup,
};
+
+/**
+ * drm_simple_encoder_init - Initialize a preallocated encoder with
+ * basic functionality.
+ * @dev: drm device
+ * @encoder: the encoder to initialize
+ * @encoder_type: user visible type of the encoder
+ *
+ * Initialises a preallocated encoder that has no further functionality.
+ * Settings for possible CRTC and clones are left to their initial values.
+ * The encoder will be cleaned up automatically as part of the mode-setting
+ * cleanup.
+ *
+ * The caller of drm_simple_encoder_init() is responsible for freeing
+ * the encoder's memory after the encoder has been cleaned up. At the
+ * moment this only works reliably if the encoder data structure is
+ * stored in the device structure. Free the encoder's memory as part of
+ * the device release function.
+ *
+ * FIXME: Later improvements to DRM's resource management may allow for
+ * an automated kfree() of the encoder's memory.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_simple_encoder_init(struct drm_device *dev,
+ struct drm_encoder *encoder,
+ int encoder_type)
+{
+ return drm_encoder_init(dev, encoder,
+ &drm_simple_encoder_funcs_cleanup,
+ encoder_type, NULL);
+}
+EXPORT_SYMBOL(drm_simple_encoder_init);
static enum drm_mode_status
drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc,
@@ -45,7 +82,7 @@
/* Anything goes */
return MODE_OK;
- return pipe->funcs->mode_valid(crtc, mode);
+ return pipe->funcs->mode_valid(pipe, mode);
}
static int drm_simple_kms_crtc_check(struct drm_crtc *crtc,
@@ -190,6 +227,13 @@
pipe->funcs->cleanup_fb(pipe, state);
}
+static bool drm_simple_kms_format_mod_supported(struct drm_plane *plane,
+ uint32_t format,
+ uint64_t modifier)
+{
+ return modifier == DRM_FORMAT_MOD_LINEAR;
+}
+
static const struct drm_plane_helper_funcs drm_simple_kms_plane_helper_funcs = {
.prepare_fb = drm_simple_kms_plane_prepare_fb,
.cleanup_fb = drm_simple_kms_plane_cleanup_fb,
@@ -204,6 +248,7 @@
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+ .format_mod_supported = drm_simple_kms_format_mod_supported,
};
/**
@@ -223,7 +268,7 @@
int drm_simple_display_pipe_attach_bridge(struct drm_simple_display_pipe *pipe,
struct drm_bridge *bridge)
{
- return drm_bridge_attach(&pipe->encoder, bridge, NULL);
+ return drm_bridge_attach(&pipe->encoder, bridge, NULL, 0);
}
EXPORT_SYMBOL(drm_simple_display_pipe_attach_bridge);
@@ -282,8 +327,7 @@
return ret;
encoder->possible_crtcs = drm_crtc_mask(crtc);
- ret = drm_encoder_init(dev, encoder, &drm_simple_kms_encoder_funcs,
- DRM_MODE_ENCODER_NONE, NULL);
+ ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_NONE);
if (ret || !connector)
return ret;
--
Gitblit v1.6.2