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_debugfs_crc.c | 85 +++++++++++++++++++-----------------------
1 files changed, 38 insertions(+), 47 deletions(-)
diff --git a/kernel/drivers/gpu/drm/drm_debugfs_crc.c b/kernel/drivers/gpu/drm/drm_debugfs_crc.c
index 2883e0d..3dd70d8 100644
--- a/kernel/drivers/gpu/drm/drm_debugfs_crc.c
+++ b/kernel/drivers/gpu/drm/drm_debugfs_crc.c
@@ -29,7 +29,14 @@
#include <linux/circ_buf.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
-#include <drm/drmP.h>
+#include <linux/poll.h>
+#include <linux/uaccess.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_debugfs_crc.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_print.h>
+
#include "drm_internal.h"
/**
@@ -59,9 +66,18 @@
* the reported CRCs of frames that should have the same contents.
*
* On the driver side the implementation effort is minimal, drivers only need to
- * implement &drm_crtc_funcs.set_crc_source. The debugfs files are automatically
- * set up if that vfunc is set. CRC samples need to be captured in the driver by
- * calling drm_crtc_add_crc_entry().
+ * implement &drm_crtc_funcs.set_crc_source and &drm_crtc_funcs.verify_crc_source.
+ * The debugfs files are automatically set up if those vfuncs are set. CRC samples
+ * need to be captured in the driver by calling drm_crtc_add_crc_entry().
+ * Depending on the driver and HW requirements, &drm_crtc_funcs.set_crc_source
+ * may result in a commit (even a full modeset).
+ *
+ * CRC results must be reliable across non-full-modeset atomic commits, so if a
+ * commit via DRM_IOCTL_MODE_ATOMIC would disable or otherwise interfere with
+ * CRC generation, then the driver must mark that commit as a full modeset
+ * (drm_atomic_crtc_needs_modeset() should return true). As a result, to ensure
+ * consistent results, generic userspace must re-setup CRC generation after a
+ * legacy SETCRTC or an atomic commit with DRM_MODE_ATOMIC_ALLOW_MODESET.
*/
static int crc_control_show(struct seq_file *m, void *data)
@@ -128,8 +144,10 @@
source[len - 1] = '\0';
ret = crtc->funcs->verify_crc_source(crtc, source, &values_cnt);
- if (ret)
+ if (ret) {
+ kfree(source);
return ret;
+ }
spin_lock_irq(&crc->lock);
@@ -228,24 +246,8 @@
if (ret)
goto err;
- spin_lock_irq(&crc->lock);
- /*
- * Only return once we got a first frame, so userspace doesn't have to
- * guess when this particular piece of HW will be ready to start
- * generating CRCs.
- */
- ret = wait_event_interruptible_lock_irq(crc->wq,
- crtc_crc_data_count(crc),
- crc->lock);
- spin_unlock_irq(&crc->lock);
-
- if (ret)
- goto err_disable;
-
return 0;
-err_disable:
- crtc->funcs->set_crc_source(crtc, NULL);
err:
spin_lock_irq(&crc->lock);
crtc_crc_cleanup(crc);
@@ -257,6 +259,11 @@
{
struct drm_crtc *crtc = filep->f_inode->i_private;
struct drm_crtc_crc *crc = &crtc->crc;
+
+ /* terminate the infinite while loop if 'drm_dp_aux_crc_work' running */
+ spin_lock_irq(&crc->lock);
+ crc->opened = false;
+ spin_unlock_irq(&crc->lock);
crtc->funcs->set_crc_source(crtc, NULL);
@@ -334,19 +341,17 @@
return LINE_LEN(crc->values_cnt);
}
-static unsigned int crtc_crc_poll(struct file *file, poll_table *wait)
+static __poll_t crtc_crc_poll(struct file *file, poll_table *wait)
{
struct drm_crtc *crtc = file->f_inode->i_private;
struct drm_crtc_crc *crc = &crtc->crc;
- unsigned ret;
+ __poll_t ret = 0;
poll_wait(file, &crc->wq, wait);
spin_lock_irq(&crc->lock);
if (crc->source && crtc_crc_data_count(crc))
- ret = POLLIN | POLLRDNORM;
- else
- ret = 0;
+ ret |= EPOLLIN | EPOLLRDNORM;
spin_unlock_irq(&crc->lock);
return ret;
@@ -360,33 +365,19 @@
.release = crtc_crc_release,
};
-int drm_debugfs_crtc_crc_add(struct drm_crtc *crtc)
+void drm_debugfs_crtc_crc_add(struct drm_crtc *crtc)
{
- struct dentry *crc_ent, *ent;
+ struct dentry *crc_ent;
if (!crtc->funcs->set_crc_source || !crtc->funcs->verify_crc_source)
- return 0;
+ return;
crc_ent = debugfs_create_dir("crc", crtc->debugfs_entry);
- if (!crc_ent)
- return -ENOMEM;
- ent = debugfs_create_file("control", S_IRUGO, crc_ent, crtc,
- &drm_crtc_crc_control_fops);
- if (!ent)
- goto error;
-
- ent = debugfs_create_file("data", S_IRUGO, crc_ent, crtc,
- &drm_crtc_crc_data_fops);
- if (!ent)
- goto error;
-
- return 0;
-
-error:
- debugfs_remove_recursive(crc_ent);
-
- return -ENOMEM;
+ debugfs_create_file("control", S_IRUGO | S_IWUSR, crc_ent, crtc,
+ &drm_crtc_crc_control_fops);
+ debugfs_create_file("data", S_IRUGO, crc_ent, crtc,
+ &drm_crtc_crc_data_fops);
}
/**
--
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