[PATCH v3 16/22] drm/i915: Implement intel_crtc_control using atomic state, v3

maarten.lankhorst
2015-05-20T16:04:56Z

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Assume the callers lock everything with drm_modeset_lock_all.

This change had to be done after converting suspend/resume to
use atomic_state so the atomic state is preserved, otherwise
all transitional state is erased.

Now all callers of .crtc_enable and .crtc_disable go through
atomic modeset! :-D

Changes since v1:
- Only check for crtc_state->active in valleyview_modeset_global_pipes.
- Only check for crtc_state->active in modeset_update_crtc_power_domains.
Changes since v2:
- Rework on top of the changed patch order.
Changes since v3:
- Rename intel_crtc_toggle in description to *_control

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 55 ++++++++++++++++++++++++------------
1 file changed, 37 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a42e7d7bf86b..e819f1738458 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5952,10 +5952,13 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
void intel_crtc_control(struct drm_crtc *crtc, bool enable)
{
struct drm_device *dev = crtc->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- enum intel_display_power_domain domain;
- unsigned long domains;
+ struct intel_crtc_state *pipe_config;
+ struct drm_plane_state *plane_state;
+ struct drm_atomic_state *state;
+ int ret;

if (enable == intel_crtc->active)
return;
@@ -5963,24 +5966,40 @@ void intel_crtc_control(struct drm_crtc *crtc, bool enable)
if (enable && !crtc->state->enable)
return;

- crtc->state->active = enable;
- if (enable) {
- domains = get_crtc_power_domains(crtc);
- for_each_power_domain(domain, domains)
- intel_display_power_get(dev_priv, domain);
- intel_crtc->enabled_power_domains = domains;
+ /* this function should be called with drm_modeset_lock_all for now */
+ if (WARN_ON(!ctx))
+ return;
+ lockdep_assert_held(&ctx->ww_ctx);

- dev_priv->display.crtc_enable(crtc);
- intel_crtc_enable_planes(crtc);
- } else {
- intel_crtc_disable_planes(crtc);
- dev_priv->display.crtc_disable(crtc);
+ state = drm_atomic_state_alloc(dev);
+ if (WARN_ON(!state))
+ return;

- domains = intel_crtc->enabled_power_domains;
- for_each_power_domain(domain, domains)
- intel_display_power_put(dev_priv, domain);
- intel_crtc->enabled_power_domains = 0;
+ state->acquire_ctx = ctx;
+ state->allow_modeset = true;
+
+ pipe_config = intel_atomic_get_crtc_state(state, intel_crtc);
+ if (IS_ERR(pipe_config)) {
+ ret = PTR_ERR(pipe_config);
+ goto err;
+ }
+ pipe_config->base.active = enable;
+
+ plane_state = drm_atomic_get_plane_state(state, crtc->primary);
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
+ goto err;
}
+
+ ret = intel_set_mode(state);
+ if (!ret)
+ return;
+
+ DRM_ERROR("Failed to toggle crtc!\n");
+
+err:
+ DRM_ERROR("Updating crtc active failed with %i\n", ret);
+ drm_atomic_state_free(state);
}

/**