On 01/20/2015 05:57 AM, Matt Roper wrote:
Add the top-level atomic entrypoints for check/commit. These won't get
called yet; we still need to either enable the atomic ioctl or switch to
using the non-transitional atomic helpers for legacy operations.
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/intel_atomic.c | 161 +++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_display.c | 2 +
drivers/gpu/drm/i915/intel_drv.h | 7 ++
4 files changed, 171 insertions(+)
create mode 100644 drivers/gpu/drm/i915/intel_atomic.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 16e3dc3..c7e2ab5 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -66,6 +66,7 @@ i915-y += dvo_ch7017.o \
dvo_ns2501.o \
dvo_sil164.o \
dvo_tfp410.o \
+ intel_atomic.o \
intel_atomic_plane.o \
intel_crt.o \
intel_ddi.o \
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
new file mode 100644
index 0000000..1542005
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * DOC: atomic modeset support
+ *
+ * The functions here implement the state management and hardware programming
+ * dispatch required by the atomic modeset infrastructure.
+ * See intel_atomic_plane.c for the plane-specific atomic functionality.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+#include "intel_drv.h"
+
+
+/**
+ * intel_atomic_check - validate state object
+ * @dev: drm device
+ * @state: state to validate
+ */
+int intel_atomic_check(struct drm_device *dev,
+ struct drm_atomic_state *state)
+{
+ int nplanes = dev->mode_config.num_total_plane;
+ int ncrtcs = dev->mode_config.num_crtc;
+ int nconnectors = dev->mode_config.num_connector;
+ int crtc_mask = 0;
+ int ret;
+ int i;
+ bool not_nuclear = false;
+
+ /* Figure out what crtcs are involved */
+ for (i = 0; i < nplanes; i++) {
+ struct drm_plane *plane = state->planes[i];
+ if (!plane)
+ continue;
+ crtc_mask |= plane->possible_crtcs;
This would compute the wrong mask for older gens, where the planes are
not mapped to one specific pipe. But we don't support planes at all in
that case, so I guess this is fine.
+ }
+
+ /*
+ * FIXME: At the moment, we only support "nuclear pageflip" on a
+ * single CRTC. Cross-crtc updates will be added later.
+ */
+ if (hweight32(crtc_mask) > 1) {
+ DRM_DEBUG_KMS("i915 only support atomic plane operations on a single CRTC at the moment\n");
+ return -EINVAL;
+ }
+
+ /*
+ * FIXME: We only handle planes for now; make sure there are no CRTC's
+ * or connectors involved.
+ */
+ state->allow_modeset = false;
+ for (i = 0; i < ncrtcs; i++)
+ not_nuclear |= (state->crtcs[i] &&
+ drm_crtc_mask(state->crtcs[i]) != crtc_mask);
+ for (i = 0; i < nconnectors; i++)
+ not_nuclear |= (state->connectors[i] != NULL);
I think "if (condition) not_nuclear = true;" would be more clear here.
Ander
+
+ if (not_nuclear) {
+ DRM_DEBUG_KMS("i915 only supports atomic plane operations at the moment\n");
+ return -EINVAL;
+ }
+
+ ret = drm_atomic_helper_check_planes(dev, state);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+
+/**
+ * intel_atomic_commit - commit validated state object
+ * @dev: DRM device
+ * @state: the top-level driver state object
+ * @async: asynchronous commit
+ *
+ * This function commits a top-level state object that has been validated
+ * with drm_atomic_helper_check().
+ *
+ * FIXME: Atomic modeset support for i915 is not yet complete. At the moment
+ * we can only handle plane-related operations and do not yet support
+ * asynchronous commit.
+ *
+ * RETURNS
+ * Zero for success or -errno.
+ */
+int intel_atomic_commit(struct drm_device *dev,
+ struct drm_atomic_state *state,
+ bool async)
+{
+ int ret;
+ int i;
+
+ if (async) {
+ DRM_DEBUG_KMS("i915 does not yet support async commit\n");
+ return -EINVAL;
+ }
+
+ ret = drm_atomic_helper_prepare_planes(dev, state);
+ if (ret)
+ return ret;
+
+ /* Point of no return */
+
+ /*
+ * FIXME: The proper sequence here will eventually be:
+ *
+ * drm_atomic_helper_swap_state(dev, state)
+ * drm_atomic_helper_commit_pre_planes(dev, state);
+ * drm_atomic_helper_commit_planes(dev, state);
+ * drm_atomic_helper_commit_post_planes(dev, state);
+ * drm_atomic_helper_wait_for_vblanks(dev, state);
+ * drm_atomic_helper_cleanup_planes(dev, state);
+ * drm_atomic_state_free(state);
+ *
+ * once we have full atomic modeset. For now, just manually update
+ * plane states to avoid clobbering good states with dummy states
+ * while nuclear pageflipping.
+ */
+ for (i = 0; i < dev->mode_config.num_total_plane; i++) {
+ struct drm_plane *plane = state->planes[i];
+
+ if (!plane)
+ continue;
+
+ plane->state->state = state;
+ swap(state->plane_states[i], plane->state);
+ plane->state->state = NULL;
+ }
+ drm_atomic_helper_commit_planes(dev, state);
+ drm_atomic_helper_wait_for_vblanks(dev, state);
+ drm_atomic_helper_cleanup_planes(dev, state);
+ drm_atomic_state_free(state);
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 50ae3b1..0e18879 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12681,6 +12681,8 @@ static inline void intel_fbdev_output_poll_changed(struct drm_device *dev)
static const struct drm_mode_config_funcs intel_mode_funcs = {
.fb_create = intel_user_framebuffer_create,
.output_poll_changed = intel_fbdev_output_poll_changed,
+ .atomic_check = intel_atomic_check,
+ .atomic_commit = intel_atomic_commit,
};
/* Set up chip specific display functions */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 2d9e9a4..503e2f2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1261,6 +1261,13 @@ void intel_pre_disable_primary(struct drm_crtc *crtc);
void intel_tv_init(struct drm_device *dev);
/* intel_atomic.c */
+int intel_atomic_check(struct drm_device *dev,
+ struct drm_atomic_state *state);
+int intel_atomic_commit(struct drm_device *dev,
+ struct drm_atomic_state *state,
+ bool async);
+
+/* intel_atomic_plane.c */
struct drm_plane_state *intel_plane_duplicate_state(struct drm_plane *plane);
void intel_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state);
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