[PATCH 09/13] drm/fb-helper: Split dpms handling into legacy and atomic paths
Daniel Vetter
daniel.vetter at ffwll.ch
Tue Jul 4 15:18:29 UTC 2017
Like with panning and modesetting, and like with those, stick with
simple drm_modeset_locking_all for the legacy path, and the full
atomic dance for atomic drivers.
This means a bit more boilerplate since setting up the atomic state
machinery is rather verbose, but then this is shared code for 30+
drivers or so, so meh.
After this patch there's only the LUT/cmap path which is still using
drm_modeset_lock_all for an atomic driver. But Peter is already
locking into reworking that, so I'll leave that code as-is for now.
v2: Squash in patches from Maarten to unify all the various atomic
paths into just one atomic update function for fbdev overall. On top
do one s/restore_fbdev_mode/restore_fbdev_mode_atomic/ so that we have
all-atomic callchains after the first check.
Cc: Peter Rosin <peda at axentia.se>
Cc: John Stultz <john.stultz at linaro.org>
Cc: Thierry Reding <treding at nvidia.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
drivers/gpu/drm/drm_fb_helper.c | 115 +++++++++++++++++-----------------------
1 file changed, 50 insertions(+), 65 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 59e2916471b2..a35a2ab8e630 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -378,7 +378,7 @@ int drm_fb_helper_debug_leave(struct fb_info *info)
}
EXPORT_SYMBOL(drm_fb_helper_debug_leave);
-static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper)
+static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active)
{
struct drm_device *dev = fb_helper->dev;
struct drm_plane *plane;
@@ -427,6 +427,17 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper)
ret = __drm_atomic_helper_set_config(mode_set, state);
if (ret != 0)
goto out_state;
+
+ /*
+ * __drm_atomic_helper_set_config() sets active when a
+ * mode is set, unconditionally clear it if we force DPMS off
+ */
+ if (!active) {
+ struct drm_crtc *crtc = mode_set->crtc;
+ struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+ crtc_state->active = false;
+ }
}
ret = drm_atomic_commit(state);
@@ -497,7 +508,7 @@ static int restore_fbdev_mode(struct drm_fb_helper *fb_helper)
struct drm_device *dev = fb_helper->dev;
if (drm_drv_uses_atomic_modeset(dev))
- return restore_fbdev_mode_atomic(fb_helper);
+ return restore_fbdev_mode_atomic(fb_helper, true);
else
return restore_fbdev_mode_legacy(fb_helper);
}
@@ -616,23 +627,13 @@ 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 drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
+static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode)
{
- struct drm_fb_helper *fb_helper = info->par;
struct drm_device *dev = fb_helper->dev;
struct drm_crtc *crtc;
struct drm_connector *connector;
int i, j;
- /*
- * For each CRTC in this fb, turn the connectors on/off.
- */
- mutex_lock(&fb_helper->lock);
- if (!drm_fb_helper_is_bound(fb_helper)) {
- mutex_unlock(&fb_helper->lock);
- return;
- }
-
drm_modeset_lock_all(dev);
for (i = 0; i < fb_helper->crtc_count; i++) {
crtc = fb_helper->crtc_info[i].mode_set.crtc;
@@ -649,6 +650,25 @@ static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
}
}
drm_modeset_unlock_all(dev);
+}
+
+static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+
+ /*
+ * For each CRTC in this fb, turn the connectors on/off.
+ */
+ mutex_lock(&fb_helper->lock);
+ if (!drm_fb_helper_is_bound(fb_helper)) {
+ mutex_unlock(&fb_helper->lock);
+ return;
+ }
+
+ if (drm_drv_uses_atomic_modeset(fb_helper->dev))
+ restore_fbdev_mode_atomic(fb_helper, dpms_mode == DRM_MODE_DPMS_ON);
+ else
+ dpms_legacy(fb_helper, dpms_mode);
mutex_unlock(&fb_helper->lock);
}
@@ -1503,70 +1523,36 @@ int drm_fb_helper_set_par(struct fb_info *info)
}
EXPORT_SYMBOL(drm_fb_helper_set_par);
-static int pan_display_atomic(struct fb_var_screeninfo *var,
- struct fb_info *info)
+static void pan_set(struct drm_fb_helper *fb_helper, int x, int y)
{
- struct drm_fb_helper *fb_helper = info->par;
- struct drm_device *dev = fb_helper->dev;
- struct drm_atomic_state *state;
- struct drm_plane *plane;
- int i, ret;
- unsigned int plane_mask;
- struct drm_modeset_acquire_ctx ctx;
-
- drm_modeset_acquire_init(&ctx, 0);
-
- state = drm_atomic_state_alloc(dev);
- if (!state) {
- ret = -ENOMEM;
- goto out_ctx;
- }
+ int i;
- state->acquire_ctx = &ctx;
-retry:
- plane_mask = 0;
for (i = 0; i < fb_helper->crtc_count; i++) {
struct drm_mode_set *mode_set;
mode_set = &fb_helper->crtc_info[i].mode_set;
- mode_set->x = var->xoffset;
- mode_set->y = var->yoffset;
-
- ret = __drm_atomic_helper_set_config(mode_set, state);
- if (ret != 0)
- goto out_state;
-
- plane = mode_set->crtc->primary;
- plane_mask |= (1 << drm_plane_index(plane));
- plane->old_fb = plane->fb;
+ mode_set->x = x;
+ mode_set->y = y;
}
+}
- ret = drm_atomic_commit(state);
- if (ret != 0)
- goto out_state;
-
- info->var.xoffset = var->xoffset;
- info->var.yoffset = var->yoffset;
-
-out_state:
- drm_atomic_clean_old_fb(dev, plane_mask, ret);
+static int pan_display_atomic(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ int ret;
- if (ret == -EDEADLK)
- goto backoff;
+ pan_set(fb_helper, var->xoffset, var->yoffset);
- drm_atomic_state_put(state);
-out_ctx:
- drm_modeset_drop_locks(&ctx);
- drm_modeset_acquire_fini(&ctx);
+ ret = restore_fbdev_mode_atomic(fb_helper, true);
+ if (!ret) {
+ info->var.xoffset = var->xoffset;
+ info->var.yoffset = var->yoffset;
+ } else
+ pan_set(fb_helper, info->var.xoffset, info->var.yoffset);
return ret;
-
-backoff:
- drm_atomic_state_clear(state);
- drm_modeset_backoff(&ctx);
-
- goto retry;
}
static int pan_display_legacy(struct fb_var_screeninfo *var,
@@ -2467,7 +2453,6 @@ EXPORT_SYMBOL(drm_fb_helper_initial_config);
*/
int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
{
- struct drm_device *dev = fb_helper->dev;
int err = 0;
if (!drm_fbdev_emulation)
--
2.13.2
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