1 files changed, 308 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
new file mode 100644
index 000000000000..f08f6da55dd0
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -0,0 +1,308 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Icenowy Zheng <icenowy@aosc.io>
+ *
+ * Based on sun4i_layer.h, which is:
+ *   Copyright (C) 2015 Free Electrons
+ *   Copyright (C) 2015 NextThing Co
+ *
+ *   Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_blend.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "sun8i_mixer.h"
+#include "sun8i_ui_layer.h"
+#include "sun8i_ui_scaler.h"
+#include "sun8i_vi_scaler.h"
+
+static void sun8i_ui_layer_disable(struct sun8i_layer *layer)
+{
+	u32 ch_base = sun8i_channel_base(layer);
+
+	regmap_write(layer->regs,
+		     SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, layer->overlay), 0);
+}
+
+static void sun8i_ui_layer_update_attributes(struct sun8i_layer *layer,
+					     struct drm_plane *plane)
+{
+	struct drm_plane_state *state = plane->state;
+	const struct drm_format_info *fmt;
+	u32 val, ch_base, hw_fmt;
+
+	ch_base = sun8i_channel_base(layer);
+	fmt = state->fb->format;
+	sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt);
+
+	val = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA(state->alpha >> 8);
+	val |= (state->alpha == DRM_BLEND_ALPHA_OPAQUE) ?
+		SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_PIXEL :
+		SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_COMBINED;
+	val |= hw_fmt << SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_OFFSET;
+	val |= SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN;
+
+	regmap_write(layer->regs,
+		     SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, layer->overlay), val);
+}
+
+static void sun8i_ui_layer_update_coord(struct sun8i_layer *layer,
+					struct drm_plane *plane)
+{
+	struct drm_plane_state *state = plane->state;
+	u32 src_w, src_h, dst_w, dst_h;
+	u32 outsize, insize;
+	u32 hphase, vphase;
+	u32 ch_base;
+
+	DRM_DEBUG_DRIVER("Updating UI channel %d overlay %d\n",
+			 layer->channel, layer->overlay);
+
+	ch_base = sun8i_channel_base(layer);
+
+	src_w = drm_rect_width(&state->src) >> 16;
+	src_h = drm_rect_height(&state->src) >> 16;
+	dst_w = drm_rect_width(&state->dst);
+	dst_h = drm_rect_height(&state->dst);
+
+	hphase = state->src.x1 & 0xffff;
+	vphase = state->src.y1 & 0xffff;
+
+	insize = SUN8I_MIXER_SIZE(src_w, src_h);
+	outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
+
+	/* Set height and width */
+	DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n",
+			 state->src.x1 >> 16, state->src.y1 >> 16);
+	DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, src_h);
+	regmap_write(layer->regs,
+		     SUN8I_MIXER_CHAN_UI_LAYER_SIZE(ch_base, layer->overlay),
+		     insize);
+	regmap_write(layer->regs,
+		     SUN8I_MIXER_CHAN_UI_OVL_SIZE(ch_base),
+		     insize);
+
+	if (insize != outsize || hphase || vphase) {
+		u32 hscale, vscale;
+
+		DRM_DEBUG_DRIVER("HW scaling is enabled\n");
+
+		hscale = state->src_w / state->crtc_w;
+		vscale = state->src_h / state->crtc_h;
+
+		if (layer->cfg->de_type == SUN8I_MIXER_DE33) {
+			sun8i_vi_scaler_setup(layer, src_w, src_h, dst_w, dst_h,
+					      hscale, vscale, hphase, vphase,
+					      state->fb->format);
+			sun8i_vi_scaler_enable(layer, true);
+		} else {
+			sun8i_ui_scaler_setup(layer, src_w, src_h, dst_w, dst_h,
+					      hscale, vscale, hphase, vphase);
+			sun8i_ui_scaler_enable(layer, true);
+		}
+	} else {
+		DRM_DEBUG_DRIVER("HW scaling is not needed\n");
+		if (layer->cfg->de_type == SUN8I_MIXER_DE33)
+			sun8i_vi_scaler_enable(layer, false);
+		else
+			sun8i_ui_scaler_enable(layer, false);
+	}
+}
+
+static void sun8i_ui_layer_update_buffer(struct sun8i_layer *layer,
+					 struct drm_plane *plane)
+{
+	struct drm_plane_state *state = plane->state;
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_gem_dma_object *gem;
+	dma_addr_t dma_addr;
+	u32 ch_base;
+	int bpp;
+
+	ch_base = sun8i_channel_base(layer);
+
+	/* Get the physical address of the buffer in memory */
+	gem = drm_fb_dma_get_gem_obj(fb, 0);
+
+	DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->dma_addr);
+
+	/* Compute the start of the displayed memory */
+	bpp = fb->format->cpp[0];
+	dma_addr = gem->dma_addr + fb->offsets[0];
+
+	/* Fixup framebuffer address for src coordinates */
+	dma_addr += (state->src.x1 >> 16) * bpp;
+	dma_addr += (state->src.y1 >> 16) * fb->pitches[0];
+
+	/* Set the line width */
+	DRM_DEBUG_DRIVER("Layer line width: %d bytes\n", fb->pitches[0]);
+	regmap_write(layer->regs,
+		     SUN8I_MIXER_CHAN_UI_LAYER_PITCH(ch_base, layer->overlay),
+		     fb->pitches[0]);
+
+	DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &dma_addr);
+
+	regmap_write(layer->regs,
+		     SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(ch_base, layer->overlay),
+		     lower_32_bits(dma_addr));
+}
+
+static int sun8i_ui_layer_atomic_check(struct drm_plane *plane,
+				       struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
+										 plane);
+	struct sun8i_layer *layer = plane_to_sun8i_layer(plane);
+	struct drm_crtc *crtc = new_plane_state->crtc;
+	struct drm_crtc_state *crtc_state;
+	const struct drm_format_info *fmt;
+	int min_scale, max_scale, ret;
+	u32 hw_fmt;
+
+	if (!crtc)
+		return 0;
+
+	crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+	if (WARN_ON(!crtc_state))
+		return -EINVAL;
+
+	fmt = new_plane_state->fb->format;
+	ret = sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt);
+	if (ret || fmt->is_yuv) {
+		DRM_DEBUG_DRIVER("Invalid plane format\n");
+		return -EINVAL;
+	}
+
+	min_scale = DRM_PLANE_NO_SCALING;
+	max_scale = DRM_PLANE_NO_SCALING;
+
+	if (layer->cfg->scaler_mask & BIT(layer->channel)) {
+		min_scale = SUN8I_UI_SCALER_SCALE_MIN;
+		max_scale = SUN8I_UI_SCALER_SCALE_MAX;
+	}
+
+	return drm_atomic_helper_check_plane_state(new_plane_state,
+						   crtc_state,
+						   min_scale, max_scale,
+						   true, true);
+}
+
+
+static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
+					 struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct sun8i_layer *layer = plane_to_sun8i_layer(plane);
+
+	if (!new_state->crtc || !new_state->visible) {
+		sun8i_ui_layer_disable(layer);
+		return;
+	}
+
+	sun8i_ui_layer_update_attributes(layer, plane);
+	sun8i_ui_layer_update_coord(layer, plane);
+	sun8i_ui_layer_update_buffer(layer, plane);
+}
+
+static const struct drm_plane_helper_funcs sun8i_ui_layer_helper_funcs = {
+	.atomic_check	= sun8i_ui_layer_atomic_check,
+	.atomic_update	= sun8i_ui_layer_atomic_update,
+};
+
+static const struct drm_plane_funcs sun8i_ui_layer_funcs = {
+	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
+	.atomic_duplicate_state	= drm_atomic_helper_plane_duplicate_state,
+	.destroy		= drm_plane_cleanup,
+	.disable_plane		= drm_atomic_helper_disable_plane,
+	.reset			= drm_atomic_helper_plane_reset,
+	.update_plane		= drm_atomic_helper_update_plane,
+};
+
+static const u32 sun8i_ui_layer_formats[] = {
+	DRM_FORMAT_ABGR1555,
+	DRM_FORMAT_ABGR4444,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_ARGB1555,
+	DRM_FORMAT_ARGB4444,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_BGR565,
+	DRM_FORMAT_BGR888,
+	DRM_FORMAT_BGRA5551,
+	DRM_FORMAT_BGRA4444,
+	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_BGRX8888,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_RGB888,
+	DRM_FORMAT_RGBA4444,
+	DRM_FORMAT_RGBA5551,
+	DRM_FORMAT_RGBA8888,
+	DRM_FORMAT_RGBX8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_XRGB8888,
+};
+
+static const uint64_t sun8i_layer_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+struct sun8i_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
+					    enum drm_plane_type type,
+					    struct regmap *regs,
+					    int index, int phy_index,
+					    int plane_cnt,
+					    const struct sun8i_layer_cfg *cfg)
+{
+	struct sun8i_layer *layer;
+	int ret;
+
+	layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
+	if (!layer)
+		return ERR_PTR(-ENOMEM);
+
+	layer->type = SUN8I_LAYER_TYPE_UI;
+	layer->index = index;
+	layer->channel = phy_index;
+	layer->overlay = 0;
+	layer->regs = regs;
+	layer->cfg = cfg;
+
+	/* possible crtcs are set later */
+	ret = drm_universal_plane_init(drm, &layer->plane, 0,
+				       &sun8i_ui_layer_funcs,
+				       sun8i_ui_layer_formats,
+				       ARRAY_SIZE(sun8i_ui_layer_formats),
+				       sun8i_layer_modifiers, type, NULL);
+	if (ret) {
+		dev_err(drm->dev, "Couldn't initialize layer\n");
+		return ERR_PTR(ret);
+	}
+
+	ret = drm_plane_create_alpha_property(&layer->plane);
+	if (ret) {
+		dev_err(drm->dev, "Couldn't add alpha property\n");
+		return ERR_PTR(ret);
+	}
+
+	ret = drm_plane_create_zpos_property(&layer->plane, index,
+					     0, plane_cnt - 1);
+	if (ret) {
+		dev_err(drm->dev, "Couldn't add zpos property\n");
+		return ERR_PTR(ret);
+	}
+
+	drm_plane_helper_add(&layer->plane, &sun8i_ui_layer_helper_funcs);
+
+	return layer;
+}