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drm/tilcdc: Use unload to handle initialization failures

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Use unload to handle initialization failures instead of complex goto
label mess. To do this the initialization sequence needed slight
reordering and some unload functions needed to become conditional.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
This commit is contained in:
Jyri Sarha 2016-10-18 23:23:27 +03:00
parent 923310ba73
commit 9e79e062dc
3 changed files with 43 additions and 71 deletions
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10
drivers/gpu/drm/tilcdc/tilcdc_crtc.c
View File

@ -177,14 +177,12 @@ static void tilcdc_crtc_enable(struct drm_crtc *crtc)
tilcdc_crtc->enabled = true;
}
void tilcdc_crtc_disable(struct drm_crtc *crtc)
void tilcdc_crtc_off(struct drm_crtc *crtc)
{
struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct tilcdc_drm_private *priv = dev->dev_private;
WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
if (!tilcdc_crtc->enabled)
return;
@ -228,6 +226,12 @@ void tilcdc_crtc_disable(struct drm_crtc *crtc)
tilcdc_crtc->enabled = false;
}
static void tilcdc_crtc_disable(struct drm_crtc *crtc)
{
WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
tilcdc_crtc_off(crtc);
}
static bool tilcdc_crtc_is_on(struct drm_crtc *crtc)
{
return crtc->state && crtc->state->enable && crtc->state->active;

101
drivers/gpu/drm/tilcdc/tilcdc_drv.c
View File

@ -158,8 +158,6 @@ static int modeset_init(struct drm_device *dev)
struct tilcdc_drm_private *priv = dev->dev_private;
struct tilcdc_module *mod;
drm_mode_config_init(dev);
priv->crtc = tilcdc_crtc_create(dev);
list_for_each_entry(mod, &module_list, list) {
@ -198,22 +196,25 @@ static void tilcdc_fini(struct drm_device *dev)
{
struct tilcdc_drm_private *priv = dev->dev_private;
drm_modeset_lock_crtc(priv->crtc, NULL);
tilcdc_crtc_disable(priv->crtc);
drm_modeset_unlock_crtc(priv->crtc);
if (priv->crtc)
tilcdc_crtc_off(priv->crtc);
drm_dev_unregister(dev);
if (priv->is_registered)
drm_dev_unregister(dev);
drm_kms_helper_poll_fini(dev);
drm_fbdev_cma_fini(priv->fbdev);
if (priv->fbdev)
drm_fbdev_cma_fini(priv->fbdev);
drm_irq_uninstall(dev);
drm_mode_config_cleanup(dev);
tilcdc_remove_external_encoders(dev);
#ifdef CONFIG_CPU_FREQ
cpufreq_unregister_notifier(&priv->freq_transition,
CPUFREQ_TRANSITION_NOTIFIER);
if (priv->freq_transition.notifier_call)
cpufreq_unregister_notifier(&priv->freq_transition,
CPUFREQ_TRANSITION_NOTIFIER);
#endif
if (priv->clk)
@ -222,8 +223,10 @@ static void tilcdc_fini(struct drm_device *dev)
if (priv->mmio)
iounmap(priv->mmio);
flush_workqueue(priv->wq);
destroy_workqueue(priv->wq);
if (priv->wq) {
flush_workqueue(priv->wq);
destroy_workqueue(priv->wq);
}
dev->dev_private = NULL;
@ -254,6 +257,8 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
ddev->platformdev = pdev;
ddev->dev_private = priv;
platform_set_drvdata(pdev, ddev);
drm_mode_config_init(ddev);
priv->is_componentized =
tilcdc_get_external_components(dev, NULL) > 0;
@ -261,28 +266,28 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
priv->wq = alloc_ordered_workqueue("tilcdc", 0);
if (!priv->wq) {
ret = -ENOMEM;
goto fail_unset_priv;
goto init_failed;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "failed to get memory resource\n");
ret = -EINVAL;
goto fail_free_wq;
goto init_failed;
}
priv->mmio = ioremap_nocache(res->start, resource_size(res));
if (!priv->mmio) {
dev_err(dev, "failed to ioremap\n");
ret = -ENOMEM;
goto fail_free_wq;
goto init_failed;
}
priv->clk = clk_get(dev, "fck");
if (IS_ERR(priv->clk)) {
dev_err(dev, "failed to get functional clock\n");
ret = -ENODEV;
goto fail_iounmap;
goto init_failed;
}
#ifdef CONFIG_CPU_FREQ
@ -291,7 +296,8 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
CPUFREQ_TRANSITION_NOTIFIER);
if (ret) {
dev_err(dev, "failed to register cpufreq notifier\n");
goto fail_put_clk;
priv->freq_transition.notifier_call = NULL;
goto init_failed;
}
#endif
@ -367,37 +373,35 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
ret = modeset_init(ddev);
if (ret < 0) {
dev_err(dev, "failed to initialize mode setting\n");
goto fail_cpufreq_unregister;
goto init_failed;
}
platform_set_drvdata(pdev, ddev);
if (priv->is_componentized) {
ret = component_bind_all(dev, ddev);
if (ret < 0)
goto fail_mode_config_cleanup;
goto init_failed;
ret = tilcdc_add_external_encoders(ddev);
if (ret < 0)
goto fail_component_cleanup;
goto init_failed;
}
if ((priv->num_encoders == 0) || (priv->num_connectors == 0)) {
dev_err(dev, "no encoders/connectors found\n");
ret = -ENXIO;
goto fail_external_cleanup;
goto init_failed;
}
ret = drm_vblank_init(ddev, 1);
if (ret < 0) {
dev_err(dev, "failed to initialize vblank\n");
goto fail_external_cleanup;
goto init_failed;
}
ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));
if (ret < 0) {
dev_err(dev, "failed to install IRQ handler\n");
goto fail_vblank_cleanup;
goto init_failed;
}
drm_mode_config_reset(ddev);
@ -407,57 +411,20 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
ddev->mode_config.num_connector);
if (IS_ERR(priv->fbdev)) {
ret = PTR_ERR(priv->fbdev);
goto fail_irq_uninstall;
goto init_failed;
}
drm_kms_helper_poll_init(ddev);
ret = drm_dev_register(ddev, 0);
if (ret)
goto fail_platform_init;
goto init_failed;
priv->is_registered = true;
return 0;
fail_platform_init:
drm_kms_helper_poll_fini(ddev);
drm_fbdev_cma_fini(priv->fbdev);
fail_irq_uninstall:
drm_irq_uninstall(ddev);
fail_vblank_cleanup:
drm_vblank_cleanup(ddev);
fail_component_cleanup:
if (priv->is_componentized)
component_unbind_all(dev, dev);
fail_mode_config_cleanup:
drm_mode_config_cleanup(ddev);
fail_external_cleanup:
tilcdc_remove_external_encoders(ddev);
fail_cpufreq_unregister:
pm_runtime_disable(dev);
#ifdef CONFIG_CPU_FREQ
cpufreq_unregister_notifier(&priv->freq_transition,
CPUFREQ_TRANSITION_NOTIFIER);
fail_put_clk:
#endif
clk_put(priv->clk);
fail_iounmap:
iounmap(priv->mmio);
fail_free_wq:
flush_workqueue(priv->wq);
destroy_workqueue(priv->wq);
fail_unset_priv:
ddev->dev_private = NULL;
drm_dev_unref(ddev);
init_failed:
tilcdc_fini(ddev);
return ret;
}

3
drivers/gpu/drm/tilcdc/tilcdc_drv.h
View File

@ -89,6 +89,7 @@ struct tilcdc_drm_private {
struct drm_connector *connectors[8];
const struct drm_connector_helper_funcs *connector_funcs[8];
bool is_registered;
bool is_componentized;
};
@ -172,7 +173,7 @@ void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
bool simulate_vesa_sync);
int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
int tilcdc_crtc_max_width(struct drm_crtc *crtc);
void tilcdc_crtc_disable(struct drm_crtc *crtc);
void tilcdc_crtc_off(struct drm_crtc *crtc);
int tilcdc_crtc_update_fb(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event);