Merge tag 'drm-misc-next-2019-08-08' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.4:

UAPI Changes:
 - HDCP: Add a Content protection type property

Cross-subsystem Changes:

Core Changes:
 - Continue to rework the include dependencies
 - fb: Remove the unused drm_gem_fbdev_fb_create function
 - drm-dp-helper: Make the link rate calculation more tolerant to
                  non-explicitly defined, yet supported, rates
 - fb-helper: Map DRM client buffer only when required, and instanciate a
              shadow buffer when the device has a dirty function or says so
 - connector: Add a helper to link the DDC adapter used by that connector to
              the userspace
 - vblank: Switch from DRM_WAIT_ON to wait_event_interruptible_timeout
 - dma-buf: Fix a stack corruption
 - ttm: Embed a drm_gem_object struct to make ttm_buffer_object a
        superclass of GEM, and convert drivers to use it.
 - hdcp: Improvements to report the content protection type to the
         userspace

Driver Changes:
 - Remove drm_gem_prime_import/export from being defined in the drivers
 - Drop DRM_AUTH usage from drivers
 - Continue to drop drmP.h
 - Convert drivers to the connector ddc helper

 - ingenic: Add support for more panel-related cases
 - komeda: Support for dual-link
 - lima: Reduce logging
 - mpag200: Fix the cursor support
 - panfrost: Export GPU features register to userspace through an ioctl
 - pl111: Remove the CLD pads wiring support from the DT
 - rockchip: Rework to use DRM PSR helpers, fix a bug in the VOP_WIN_GET
             macro
 - sun4i: Improve support for color encoding and range
 - tinydrm: Rework SPI support, improve MIPI-DBI support, move to drm/tiny
 - vkms: Rework of the CRC tracking

 - bridges:
   - sii902x: Add support for audio graph card
   - tc358767: Rework AUX data handling code
   - ti-sn65dsi86: Add Debugfs and proper DSI mode flags support

 - panels
   - Support for GiantPlus GPM940B0, Sharp LQ070Y3DG3B, Ortustech
     COM37H3M, Novatek NT39016, Sharp LS020B1DD01D, Raydium RM67191,
     Boe Himax8279d, Sharp LD-D5116Z01B
   - Conversion of the device tree bindings to the YAML description
   - jh057n00900: Rework the enable / disable path

 - fbdev:
   - ssd1307fb: Support more devices based on that controller

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190808121423.xzpedzkpyecvsiy4@flea

1 files changed, 249 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
new file mode 100644
index 000000000000..d5585695c64d
--- /dev/null
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/crc32.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "vkms_drv.h"
+
+/**
+ * compute_crc - Compute CRC value on output frame
+ *
+ * @vaddr_out: address to final framebuffer
+ * @composer: framebuffer's metadata
+ *
+ * returns CRC value computed using crc32 on the visible portion of
+ * the final framebuffer at vaddr_out
+ */
+static uint32_t compute_crc(void *vaddr_out, struct vkms_composer *composer)
+{
+	int i, j, src_offset;
+	int x_src = composer->src.x1 >> 16;
+	int y_src = composer->src.y1 >> 16;
+	int h_src = drm_rect_height(&composer->src) >> 16;
+	int w_src = drm_rect_width(&composer->src) >> 16;
+	u32 crc = 0;
+
+	for (i = y_src; i < y_src + h_src; ++i) {
+		for (j = x_src; j < x_src + w_src; ++j) {
+			src_offset = composer->offset
+				     + (i * composer->pitch)
+				     + (j * composer->cpp);
+			/* XRGB format ignores Alpha channel */
+			memset(vaddr_out + src_offset + 24, 0,  8);
+			crc = crc32_le(crc, vaddr_out + src_offset,
+				       sizeof(u32));
+		}
+	}
+
+	return crc;
+}
+
+/**
+ * blend - belnd value at vaddr_src with value at vaddr_dst
+ * @vaddr_dst: destination address
+ * @vaddr_src: source address
+ * @dest_composer: destination framebuffer's metadata
+ * @src_composer: source framebuffer's metadata
+ *
+ * Blend value at vaddr_src with value at vaddr_dst.
+ * Currently, this function write value at vaddr_src on value
+ * at vaddr_dst using buffer's metadata to locate the new values
+ * from vaddr_src and their distenation at vaddr_dst.
+ *
+ * Todo: Use the alpha value to blend vaddr_src with vaddr_dst
+ *	 instead of overwriting it.
+ */
+static void blend(void *vaddr_dst, void *vaddr_src,
+		  struct vkms_composer *dest_composer,
+		  struct vkms_composer *src_composer)
+{
+	int i, j, j_dst, i_dst;
+	int offset_src, offset_dst;
+
+	int x_src = src_composer->src.x1 >> 16;
+	int y_src = src_composer->src.y1 >> 16;
+
+	int x_dst = src_composer->dst.x1;
+	int y_dst = src_composer->dst.y1;
+	int h_dst = drm_rect_height(&src_composer->dst);
+	int w_dst = drm_rect_width(&src_composer->dst);
+
+	int y_limit = y_src + h_dst;
+	int x_limit = x_src + w_dst;
+
+	for (i = y_src, i_dst = y_dst; i < y_limit; ++i) {
+		for (j = x_src, j_dst = x_dst; j < x_limit; ++j) {
+			offset_dst = dest_composer->offset
+				     + (i_dst * dest_composer->pitch)
+				     + (j_dst++ * dest_composer->cpp);
+			offset_src = src_composer->offset
+				     + (i * src_composer->pitch)
+				     + (j * src_composer->cpp);
+
+			memcpy(vaddr_dst + offset_dst,
+			       vaddr_src + offset_src, sizeof(u32));
+		}
+		i_dst++;
+	}
+}
+
+static void compose_cursor(struct vkms_composer *cursor_composer,
+			   struct vkms_composer *primary_composer,
+			   void *vaddr_out)
+{
+	struct drm_gem_object *cursor_obj;
+	struct vkms_gem_object *cursor_vkms_obj;
+
+	cursor_obj = drm_gem_fb_get_obj(&cursor_composer->fb, 0);
+	cursor_vkms_obj = drm_gem_to_vkms_gem(cursor_obj);
+
+	if (WARN_ON(!cursor_vkms_obj->vaddr))
+		return;
+
+	blend(vaddr_out, cursor_vkms_obj->vaddr,
+	      primary_composer, cursor_composer);
+}
+
+static uint32_t _vkms_get_crc(struct vkms_composer *primary_composer,
+			      struct vkms_composer *cursor_composer)
+{
+	struct drm_framebuffer *fb = &primary_composer->fb;
+	struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
+	struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(gem_obj);
+	void *vaddr_out = kzalloc(vkms_obj->gem.size, GFP_KERNEL);
+	u32 crc = 0;
+
+	if (!vaddr_out) {
+		DRM_ERROR("Failed to allocate memory for output frame.");
+		return 0;
+	}
+
+	if (WARN_ON(!vkms_obj->vaddr)) {
+		kfree(vaddr_out);
+		return crc;
+	}
+
+	memcpy(vaddr_out, vkms_obj->vaddr, vkms_obj->gem.size);
+
+	if (cursor_composer)
+		compose_cursor(cursor_composer, primary_composer, vaddr_out);
+
+	crc = compute_crc(vaddr_out, primary_composer);
+
+	kfree(vaddr_out);
+
+	return crc;
+}
+
+/**
+ * vkms_composer_worker - ordered work_struct to compute CRC
+ *
+ * @work: work_struct
+ *
+ * Work handler for composing and computing CRCs. work_struct scheduled in
+ * an ordered workqueue that's periodically scheduled to run by
+ * _vblank_handle() and flushed at vkms_atomic_crtc_destroy_state().
+ */
+void vkms_composer_worker(struct work_struct *work)
+{
+	struct vkms_crtc_state *crtc_state = container_of(work,
+						struct vkms_crtc_state,
+						composer_work);
+	struct drm_crtc *crtc = crtc_state->base.crtc;
+	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
+	struct vkms_composer *primary_composer = NULL;
+	struct vkms_composer *cursor_composer = NULL;
+	u32 crc32 = 0;
+	u64 frame_start, frame_end;
+	bool crc_pending;
+
+	spin_lock_irq(&out->composer_lock);
+	frame_start = crtc_state->frame_start;
+	frame_end = crtc_state->frame_end;
+	crc_pending = crtc_state->crc_pending;
+	crtc_state->frame_start = 0;
+	crtc_state->frame_end = 0;
+	crtc_state->crc_pending = false;
+	spin_unlock_irq(&out->composer_lock);
+
+	/*
+	 * We raced with the vblank hrtimer and previous work already computed
+	 * the crc, nothing to do.
+	 */
+	if (!crc_pending)
+		return;
+
+	if (crtc_state->num_active_planes >= 1)
+		primary_composer = crtc_state->active_planes[0]->composer;
+
+	if (crtc_state->num_active_planes == 2)
+		cursor_composer = crtc_state->active_planes[1]->composer;
+
+	if (primary_composer)
+		crc32 = _vkms_get_crc(primary_composer, cursor_composer);
+
+	/*
+	 * The worker can fall behind the vblank hrtimer, make sure we catch up.
+	 */
+	while (frame_start <= frame_end)
+		drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32);
+}
+
+static const char * const pipe_crc_sources[] = {"auto"};
+
+const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
+					size_t *count)
+{
+	*count = ARRAY_SIZE(pipe_crc_sources);
+	return pipe_crc_sources;
+}
+
+static int vkms_crc_parse_source(const char *src_name, bool *enabled)
+{
+	int ret = 0;
+
+	if (!src_name) {
+		*enabled = false;
+	} else if (strcmp(src_name, "auto") == 0) {
+		*enabled = true;
+	} else {
+		*enabled = false;
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+int vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name,
+			   size_t *values_cnt)
+{
+	bool enabled;
+
+	if (vkms_crc_parse_source(src_name, &enabled) < 0) {
+		DRM_DEBUG_DRIVER("unknown source %s\n", src_name);
+		return -EINVAL;
+	}
+
+	*values_cnt = 1;
+
+	return 0;
+}
+
+int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name)
+{
+	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
+	bool enabled = false;
+	int ret = 0;
+
+	ret = vkms_crc_parse_source(src_name, &enabled);
+
+	spin_lock_irq(&out->lock);
+	out->composer_enabled = enabled;
+	spin_unlock_irq(&out->lock);
+
+	return ret;
+}