From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/drivers/gpu/drm/stm/drv.c | 108 ++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 77 insertions(+), 31 deletions(-)
diff --git a/kernel/drivers/gpu/drm/stm/drv.c b/kernel/drivers/gpu/drm/stm/drv.c
index f2021b2..411103f 100644
--- a/kernel/drivers/gpu/drm/stm/drv.c
+++ b/kernel/drivers/gpu/drm/stm/drv.c
@@ -9,15 +9,20 @@
*/
#include <linux/component.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_fb_helper.h>
+#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
#include "ltdc.h"
@@ -26,7 +31,6 @@
static const struct drm_mode_config_funcs drv_mode_config_funcs = {
.fb_create = drm_gem_fb_create,
- .output_poll_changed = drm_fb_helper_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
@@ -50,9 +54,7 @@
DEFINE_DRM_GEM_CMA_FOPS(drv_driver_fops);
static struct drm_driver drv_driver = {
- .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
- DRIVER_ATOMIC,
- .lastclose = drm_fb_helper_lastclose,
+ .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
.name = "stm",
.desc = "STMicroelectronics SoC DRM",
.date = "20170330",
@@ -60,18 +62,7 @@
.minor = 0,
.patchlevel = 0,
.fops = &drv_driver_fops,
- .dumb_create = stm_gem_cma_dumb_create,
- .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
- .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_free_object_unlocked = drm_gem_cma_free_object,
- .gem_vm_ops = &drm_gem_cma_vm_ops,
- .gem_prime_export = drm_gem_prime_export,
- .gem_prime_import = drm_gem_prime_import,
- .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
- .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
- .gem_prime_vmap = drm_gem_cma_prime_vmap,
- .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
- .gem_prime_mmap = drm_gem_cma_prime_mmap,
+ DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(stm_gem_cma_dumb_create),
};
static int drv_load(struct drm_device *ddev)
@@ -88,7 +79,9 @@
ddev->dev_private = (void *)ldev;
- drm_mode_config_init(ddev);
+ ret = drmm_mode_config_init(ddev);
+ if (ret)
+ return ret;
/*
* set max width and height as default value.
@@ -103,34 +96,84 @@
ret = ltdc_load(ddev);
if (ret)
- goto err;
+ return ret;
drm_mode_config_reset(ddev);
drm_kms_helper_poll_init(ddev);
- if (ddev->mode_config.num_connector) {
- ret = drm_fb_cma_fbdev_init(ddev, 16, 0);
- if (ret)
- DRM_DEBUG("Warning: fails to create fbdev\n");
- }
-
platform_set_drvdata(pdev, ddev);
return 0;
-err:
- drm_mode_config_cleanup(ddev);
- return ret;
}
static void drv_unload(struct drm_device *ddev)
{
DRM_DEBUG("%s\n", __func__);
- drm_fb_cma_fbdev_fini(ddev);
drm_kms_helper_poll_fini(ddev);
ltdc_unload(ddev);
- drm_mode_config_cleanup(ddev);
}
+
+static __maybe_unused int drv_suspend(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct ltdc_device *ldev = ddev->dev_private;
+ struct drm_atomic_state *state;
+
+ WARN_ON(ldev->suspend_state);
+
+ state = drm_atomic_helper_suspend(ddev);
+ if (IS_ERR(state))
+ return PTR_ERR(state);
+
+ ldev->suspend_state = state;
+ pm_runtime_force_suspend(dev);
+
+ return 0;
+}
+
+static __maybe_unused int drv_resume(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct ltdc_device *ldev = ddev->dev_private;
+ int ret;
+
+ if (WARN_ON(!ldev->suspend_state))
+ return -ENOENT;
+
+ pm_runtime_force_resume(dev);
+ ret = drm_atomic_helper_resume(ddev, ldev->suspend_state);
+ if (ret)
+ pm_runtime_force_suspend(dev);
+
+ ldev->suspend_state = NULL;
+
+ return ret;
+}
+
+static __maybe_unused int drv_runtime_suspend(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+
+ DRM_DEBUG_DRIVER("\n");
+ ltdc_suspend(ddev);
+
+ return 0;
+}
+
+static __maybe_unused int drv_runtime_resume(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+
+ DRM_DEBUG_DRIVER("\n");
+ return ltdc_resume(ddev);
+}
+
+static const struct dev_pm_ops drv_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(drv_suspend, drv_resume)
+ SET_RUNTIME_PM_OPS(drv_runtime_suspend,
+ drv_runtime_resume, NULL)
+};
static int stm_drm_platform_probe(struct platform_device *pdev)
{
@@ -153,6 +196,8 @@
ret = drm_dev_register(ddev, 0);
if (ret)
goto err_put;
+
+ drm_fbdev_generic_setup(ddev, 16);
return 0;
@@ -187,6 +232,7 @@
.driver = {
.name = "stm32-display",
.of_match_table = drv_dt_ids,
+ .pm = &drv_pm_ops,
},
};
--
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