Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 198 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
new file mode 100644
index 0000000000..086a3f1ff9
--- /dev/null
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -0,0 +1,198 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#ifndef __MSM_KMS_H__
+#define __MSM_KMS_H__
+
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+
+#include "msm_drv.h"
+
+#define MAX_PLANE	4
+
+/* As there are different display controller blocks depending on the
+ * snapdragon version, the kms support is split out and the appropriate
+ * implementation is loaded at runtime.  The kms module is responsible
+ * for constructing the appropriate planes/crtcs/encoders/connectors.
+ */
+struct msm_kms_funcs {
+	/* hw initialization: */
+	int (*hw_init)(struct msm_kms *kms);
+	/* irq handling: */
+	void (*irq_preinstall)(struct msm_kms *kms);
+	int (*irq_postinstall)(struct msm_kms *kms);
+	void (*irq_uninstall)(struct msm_kms *kms);
+	irqreturn_t (*irq)(struct msm_kms *kms);
+	int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
+	void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
+
+	/*
+	 * Atomic commit handling:
+	 *
+	 * Note that in the case of async commits, the funcs which take
+	 * a crtc_mask (ie. ->flush_commit(), and ->complete_commit())
+	 * might not be evenly balanced with ->prepare_commit(), however
+	 * each crtc that effected by a ->prepare_commit() (potentially
+	 * multiple times) will eventually (at end of vsync period) be
+	 * flushed and completed.
+	 *
+	 * This has some implications about tracking of cleanup state,
+	 * for example SMP blocks to release after commit completes.  Ie.
+	 * cleanup state should be also duplicated in the various
+	 * duplicate_state() methods, as the current cleanup state at
+	 * ->complete_commit() time may have accumulated cleanup work
+	 * from multiple commits.
+	 */
+
+	/**
+	 * Enable/disable power/clks needed for hw access done in other
+	 * commit related methods.
+	 *
+	 * If mdp4 is migrated to runpm, we could probably drop these
+	 * and use runpm directly.
+	 */
+	void (*enable_commit)(struct msm_kms *kms);
+	void (*disable_commit)(struct msm_kms *kms);
+
+	/**
+	 * Prepare for atomic commit.  This is called after any previous
+	 * (async or otherwise) commit has completed.
+	 */
+	void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
+
+	/**
+	 * Flush an atomic commit.  This is called after the hardware
+	 * updates have already been pushed down to effected planes/
+	 * crtcs/encoders/connectors.
+	 */
+	void (*flush_commit)(struct msm_kms *kms, unsigned crtc_mask);
+
+	/**
+	 * Wait for any in-progress flush to complete on the specified
+	 * crtcs.  This should not block if there is no in-progress
+	 * commit (ie. don't just wait for a vblank), as it will also
+	 * be called before ->prepare_commit() to ensure any potential
+	 * "async" commit has completed.
+	 */
+	void (*wait_flush)(struct msm_kms *kms, unsigned crtc_mask);
+
+	/**
+	 * Clean up after commit is completed.  This is called after
+	 * ->wait_flush(), to give the backend a chance to do any
+	 * post-commit cleanup.
+	 */
+	void (*complete_commit)(struct msm_kms *kms, unsigned crtc_mask);
+
+	/*
+	 * Format handling:
+	 */
+
+	/* get msm_format w/ optional format modifiers from drm_mode_fb_cmd2 */
+	const struct msm_format *(*get_format)(struct msm_kms *kms,
+					const uint32_t format,
+					const uint64_t modifiers);
+	/* do format checking on format modified through fb_cmd2 modifiers */
+	int (*check_modified_format)(const struct msm_kms *kms,
+			const struct msm_format *msm_fmt,
+			const struct drm_mode_fb_cmd2 *cmd,
+			struct drm_gem_object **bos);
+
+	/* misc: */
+	long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,
+			struct drm_encoder *encoder);
+	int (*set_split_display)(struct msm_kms *kms,
+			struct drm_encoder *encoder,
+			struct drm_encoder *slave_encoder,
+			bool is_cmd_mode);
+	/* cleanup: */
+	void (*destroy)(struct msm_kms *kms);
+
+	/* snapshot: */
+	void (*snapshot)(struct msm_disp_state *disp_state, struct msm_kms *kms);
+
+#ifdef CONFIG_DEBUG_FS
+	/* debugfs: */
+	int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor);
+#endif
+};
+
+struct msm_kms;
+
+/*
+ * A per-crtc timer for pending async atomic flushes.  Scheduled to expire
+ * shortly before vblank to flush pending async updates.
+ */
+struct msm_pending_timer {
+	struct msm_hrtimer_work work;
+	struct kthread_worker *worker;
+	struct msm_kms *kms;
+	unsigned crtc_idx;
+};
+
+struct msm_kms {
+	const struct msm_kms_funcs *funcs;
+	struct drm_device *dev;
+
+	/* irq number to be passed on to msm_irq_install */
+	int irq;
+	bool irq_requested;
+
+	/* mapper-id used to request GEM buffer mapped for scanout: */
+	struct msm_gem_address_space *aspace;
+
+	/* disp snapshot support */
+	struct kthread_worker *dump_worker;
+	struct kthread_work dump_work;
+	struct mutex dump_mutex;
+
+	/*
+	 * For async commit, where ->flush_commit() and later happens
+	 * from the crtc's pending_timer close to end of the frame:
+	 */
+	struct mutex commit_lock[MAX_CRTCS];
+	unsigned pending_crtc_mask;
+	struct msm_pending_timer pending_timers[MAX_CRTCS];
+};
+
+static inline int msm_kms_init(struct msm_kms *kms,
+		const struct msm_kms_funcs *funcs)
+{
+	unsigned i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(kms->commit_lock); i++)
+		mutex_init(&kms->commit_lock[i]);
+
+	kms->funcs = funcs;
+
+	for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) {
+		ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);
+		if (ret) {
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static inline void msm_kms_destroy(struct msm_kms *kms)
+{
+	unsigned i;
+
+	for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
+		msm_atomic_destroy_pending_timer(&kms->pending_timers[i]);
+}
+
+#define for_each_crtc_mask(dev, crtc, crtc_mask) \
+	drm_for_each_crtc(crtc, dev) \
+		for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
+
+#define for_each_crtc_mask_reverse(dev, crtc, crtc_mask) \
+	drm_for_each_crtc_reverse(crtc, dev) \
+		for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
+
+#endif /* __MSM_KMS_H__ */