[PATCH v2 07/12] drm/fb-helper: Prepare to move out commit code
Noralf Trønnes
noralf at tronnes.org
Sun Apr 7 16:52:38 UTC 2019
This makes the necessary changes so the commit code can be moved out to
drm_client as-is in the next patch. It's split up to ease review.
Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
drivers/gpu/drm/drm_fb_helper.c | 122 +++++++++++++++++++++-----------
1 file changed, 81 insertions(+), 41 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index b65edfc99feb..0229e187e6de 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -388,9 +388,20 @@ int drm_fb_helper_debug_leave(struct fb_info *info)
}
EXPORT_SYMBOL(drm_fb_helper_debug_leave);
-/* Check if the plane can hw rotate to match panel orientation */
-static bool drm_fb_helper_panel_rotation(struct drm_mode_set *modeset,
- unsigned int *rotation)
+/**
+ * drm_client_panel_rotation() - Check panel orientation
+ * @modeset: DRM modeset
+ * @rotation: Returned rotation value
+ *
+ * This function checks if the primary plane in @modeset can hw rotate to match
+ * the panel orientation on its connector.
+ *
+ * Note: Currently only 0 and 180 degrees are supported.
+ *
+ * Return:
+ * True if the plane can do the rotation, false otherwise.
+ */
+bool drm_client_panel_rotation(struct drm_mode_set *modeset, unsigned int *rotation)
{
struct drm_connector *connector = modeset->connectors[0];
struct drm_plane *plane = modeset->crtc->primary;
@@ -431,10 +442,9 @@ static bool drm_fb_helper_panel_rotation(struct drm_mode_set *modeset,
return true;
}
-static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active)
+static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active)
{
- struct drm_client_dev *client = &fb_helper->client;
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
struct drm_plane_state *plane_state;
struct drm_plane *plane;
struct drm_atomic_state *state;
@@ -474,7 +484,7 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ
struct drm_plane *primary = mode_set->crtc->primary;
unsigned int rotation;
- if (drm_fb_helper_panel_rotation(mode_set, &rotation)) {
+ if (drm_client_panel_rotation(mode_set, &rotation)) {
/* Cannot fail as we've already gotten the plane state above */
plane_state = drm_atomic_get_new_plane_state(state, primary);
plane_state->rotation = rotation;
@@ -516,15 +526,14 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ
goto retry;
}
-static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper)
+static int drm_client_modeset_commit_legacy(struct drm_client_dev *client)
{
- struct drm_client_dev *client = &fb_helper->client;
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
struct drm_mode_set *mode_set;
struct drm_plane *plane;
int ret = 0;
- drm_modeset_lock_all(fb_helper->dev);
+ drm_modeset_lock_all(dev);
drm_for_each_plane(plane, dev) {
if (plane->type != DRM_PLANE_TYPE_PRIMARY)
drm_plane_force_disable(plane);
@@ -553,35 +562,53 @@ static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper)
goto out;
}
out:
- drm_modeset_unlock_all(fb_helper->dev);
+ drm_modeset_unlock_all(dev);
return ret;
}
-static int restore_fbdev_mode_force(struct drm_fb_helper *fb_helper)
+/**
+ * drm_client_modeset_commit_force() - Force commit CRTC configuration
+ * @client: DRM client
+ *
+ * Commit modeset configuration to crtcs without checking if there is a DRM master.
+ *
+ * Returns:
+ * Zero on success or negative error code on failure.
+ */
+int drm_client_modeset_commit_force(struct drm_client_dev *client)
{
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
int ret;
- mutex_lock(&fb_helper->client.modeset_mutex);
+ mutex_lock(&client->modeset_mutex);
if (drm_drv_uses_atomic_modeset(dev))
- ret = restore_fbdev_mode_atomic(fb_helper, true);
+ ret = drm_client_modeset_commit_atomic(client, true);
else
- ret = restore_fbdev_mode_legacy(fb_helper);
- mutex_unlock(&fb_helper->client.modeset_mutex);
+ ret = drm_client_modeset_commit_legacy(client);
+ mutex_unlock(&client->modeset_mutex);
return ret;
}
-static int restore_fbdev_mode(struct drm_fb_helper *fb_helper)
+/**
+ * drm_client_modeset_commit() - Commit CRTC configuration
+ * @client: DRM client
+ *
+ * Commit modeset configuration to crtcs.
+ *
+ * Returns:
+ * Zero on success or negative error code on failure.
+ */
+int drm_client_modeset_commit(struct drm_client_dev *client)
{
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
int ret;
if (!drm_master_internal_acquire(dev))
return -EBUSY;
- ret = restore_fbdev_mode_force(fb_helper);
+ ret = drm_client_modeset_commit_force(client);
drm_master_internal_release(dev);
@@ -611,7 +638,7 @@ int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
return 0;
mutex_lock(&fb_helper->lock);
- ret = restore_fbdev_mode(fb_helper);
+ ret = drm_client_modeset_commit(&fb_helper->client);
do_delayed = fb_helper->delayed_hotplug;
if (do_delayed)
@@ -645,7 +672,7 @@ static bool drm_fb_helper_force_kernel_mode(void)
continue;
mutex_lock(&helper->lock);
- ret = restore_fbdev_mode_force(helper);
+ ret = drm_client_modeset_commit_force(&helper->client);
if (ret)
error = true;
mutex_unlock(&helper->lock);
@@ -677,10 +704,9 @@ static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
#endif
-static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode)
+static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode)
{
- struct drm_client_dev *client = &fb_helper->client;
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
struct drm_connector *connector;
struct drm_mode_set *modeset;
int j;
@@ -700,28 +726,42 @@ static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode)
drm_modeset_unlock_all(dev);
}
-static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
+/**
+ * drm_client_modeset_dpms() - Set DPMS mode
+ * @client: DRM client
+ * @mode: DPMS mode
+ *
+ * Note: For atomic drivers @mode is reduced to on/off.
+ *
+ * Returns:
+ * Zero on success or negative error code on failure.
+ */
+int drm_client_modeset_dpms(struct drm_client_dev *client, int mode)
{
- struct drm_fb_helper *fb_helper = info->par;
- struct drm_client_dev *client = &fb_helper->client;
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
+ int ret = 0;
- /*
- * For each CRTC in this fb, turn the connectors on/off.
- */
- mutex_lock(&fb_helper->lock);
if (!drm_master_internal_acquire(dev))
- goto unlock;
+ return -EBUSY;
mutex_lock(&client->modeset_mutex);
if (drm_drv_uses_atomic_modeset(dev))
- restore_fbdev_mode_atomic(fb_helper, dpms_mode == DRM_MODE_DPMS_ON);
+ ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON);
else
- dpms_legacy(fb_helper, dpms_mode);
+ drm_client_modeset_dpms_legacy(client, mode);
mutex_unlock(&client->modeset_mutex);
drm_master_internal_release(dev);
-unlock:
+
+ return ret;
+}
+
+static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+
+ mutex_lock(&fb_helper->lock);
+ drm_client_modeset_dpms(&fb_helper->client, dpms_mode);
mutex_unlock(&fb_helper->lock);
}
@@ -1795,7 +1835,7 @@ static int pan_display_atomic(struct fb_var_screeninfo *var,
pan_set(fb_helper, var->xoffset, var->yoffset);
- ret = restore_fbdev_mode_force(fb_helper);
+ ret = drm_client_modeset_commit_force(&fb_helper->client);
if (!ret) {
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
@@ -2021,7 +2061,7 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
/* First time: disable all crtc's.. */
if (!fb_helper->deferred_setup)
- restore_fbdev_mode(fb_helper);
+ drm_client_modeset_commit(client);
return -EAGAIN;
}
@@ -2794,7 +2834,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
modeset->fb = fb_helper->fb;
- if (drm_fb_helper_panel_rotation(modeset, &rotation))
+ if (drm_client_panel_rotation(modeset, &rotation))
/* Rotating in hardware, fbcon should not rotate */
sw_rotations |= DRM_MODE_ROTATE_0;
else
--
2.20.1
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