1 files changed, 409 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
new file mode 100644
index 000000000..15fc6363c
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -0,0 +1,409 @@
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@siol.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drmP.h>
+
+#include "sun8i_vi_layer.h"
+#include "sun8i_mixer.h"
+#include "sun8i_vi_scaler.h"
+
+static void sun8i_vi_layer_enable(struct sun8i_mixer *mixer, int channel,
+				  int overlay, bool enable, unsigned int zpos,
+				  unsigned int old_zpos)
+{
+	u32 val;
+
+	DRM_DEBUG_DRIVER("%sabling VI channel %d overlay %d\n",
+			 enable ? "En" : "Dis", channel, overlay);
+
+	if (enable)
+		val = SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN;
+	else
+		val = 0;
+
+	regmap_update_bits(mixer->engine.regs,
+			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR(channel, overlay),
+			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN, val);
+
+	if (!enable || zpos != old_zpos) {
+		regmap_update_bits(mixer->engine.regs,
+				   SUN8I_MIXER_BLEND_PIPE_CTL,
+				   SUN8I_MIXER_BLEND_PIPE_CTL_EN(old_zpos),
+				   0);
+
+		regmap_update_bits(mixer->engine.regs,
+				   SUN8I_MIXER_BLEND_ROUTE,
+				   SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(old_zpos),
+				   0);
+	}
+
+	if (enable) {
+		val = SUN8I_MIXER_BLEND_PIPE_CTL_EN(zpos);
+
+		regmap_update_bits(mixer->engine.regs,
+				   SUN8I_MIXER_BLEND_PIPE_CTL, val, val);
+
+		val = channel << SUN8I_MIXER_BLEND_ROUTE_PIPE_SHIFT(zpos);
+
+		regmap_update_bits(mixer->engine.regs,
+				   SUN8I_MIXER_BLEND_ROUTE,
+				   SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(zpos),
+				   val);
+	}
+}
+
+static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
+				       int overlay, struct drm_plane *plane,
+				       unsigned int zpos)
+{
+	struct drm_plane_state *state = plane->state;
+	const struct drm_format_info *format = state->fb->format;
+	u32 src_w, src_h, dst_w, dst_h;
+	u32 outsize, insize;
+	u32 hphase, vphase;
+	bool subsampled;
+
+	DRM_DEBUG_DRIVER("Updating VI channel %d overlay %d\n",
+			 channel, overlay);
+
+	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;
+
+	/* make coordinates dividable by subsampling factor */
+	if (format->hsub > 1) {
+		int mask, remainder;
+
+		mask = format->hsub - 1;
+		remainder = (state->src.x1 >> 16) & mask;
+		src_w = (src_w + remainder) & ~mask;
+		hphase += remainder << 16;
+	}
+
+	if (format->vsub > 1) {
+		int mask, remainder;
+
+		mask = format->vsub - 1;
+		remainder = (state->src.y1 >> 16) & mask;
+		src_h = (src_h + remainder) & ~mask;
+		vphase += remainder << 16;
+	}
+
+	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) & ~(format->hsub - 1),
+			 (state->src.y1 >> 16) & ~(format->vsub - 1));
+	DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, src_h);
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_CHAN_VI_LAYER_SIZE(channel, overlay),
+		     insize);
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_CHAN_VI_OVL_SIZE(channel),
+		     insize);
+
+	/*
+	 * Scaler must be enabled for subsampled formats, so it scales
+	 * chroma to same size as luma.
+	 */
+	subsampled = format->hsub > 1 || format->vsub > 1;
+
+	if (insize != outsize || subsampled || 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;
+
+		sun8i_vi_scaler_setup(mixer, channel, src_w, src_h, dst_w,
+				      dst_h, hscale, vscale, hphase, vphase,
+				      format);
+		sun8i_vi_scaler_enable(mixer, channel, true);
+	} else {
+		DRM_DEBUG_DRIVER("HW scaling is not needed\n");
+		sun8i_vi_scaler_enable(mixer, channel, false);
+	}
+
+	/* Set base coordinates */
+	DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n",
+			 state->dst.x1, state->dst.y1);
+	DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, dst_h);
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_BLEND_ATTR_COORD(zpos),
+		     SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1));
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_BLEND_ATTR_INSIZE(zpos),
+		     outsize);
+
+	return 0;
+}
+
+static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
+					 int overlay, struct drm_plane *plane)
+{
+	struct drm_plane_state *state = plane->state;
+	const struct de2_fmt_info *fmt_info;
+	u32 val;
+
+	fmt_info = sun8i_mixer_format_info(state->fb->format->format);
+	if (!fmt_info) {
+		DRM_DEBUG_DRIVER("Invalid format\n");
+		return -EINVAL;
+	}
+
+	val = fmt_info->de2_fmt << SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_OFFSET;
+	regmap_update_bits(mixer->engine.regs,
+			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR(channel, overlay),
+			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK, val);
+
+	if (fmt_info->csc != SUN8I_CSC_MODE_OFF) {
+		sun8i_csc_set_ccsc_coefficients(mixer, channel, fmt_info->csc);
+		sun8i_csc_enable_ccsc(mixer, channel, true);
+	} else {
+		sun8i_csc_enable_ccsc(mixer, channel, false);
+	}
+
+	if (fmt_info->rgb)
+		val = SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE;
+	else
+		val = 0;
+
+	regmap_update_bits(mixer->engine.regs,
+			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR(channel, overlay),
+			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE, val);
+
+	return 0;
+}
+
+static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
+					int overlay, struct drm_plane *plane)
+{
+	struct drm_plane_state *state = plane->state;
+	struct drm_framebuffer *fb = state->fb;
+	const struct drm_format_info *format = fb->format;
+	struct drm_gem_cma_object *gem;
+	u32 dx, dy, src_x, src_y;
+	dma_addr_t paddr;
+	int i;
+
+	/* Adjust x and y to be dividable by subsampling factor */
+	src_x = (state->src.x1 >> 16) & ~(format->hsub - 1);
+	src_y = (state->src.y1 >> 16) & ~(format->vsub - 1);
+
+	for (i = 0; i < format->num_planes; i++) {
+		/* Get the physical address of the buffer in memory */
+		gem = drm_fb_cma_get_gem_obj(fb, i);
+
+		DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
+
+		/* Compute the start of the displayed memory */
+		paddr = gem->paddr + fb->offsets[i];
+
+		dx = src_x;
+		dy = src_y;
+
+		if (i > 0) {
+			dx /= format->hsub;
+			dy /= format->vsub;
+		}
+
+		/* Fixup framebuffer address for src coordinates */
+		paddr += dx * format->cpp[i];
+		paddr += dy * fb->pitches[i];
+
+		/* Set the line width */
+		DRM_DEBUG_DRIVER("Layer %d. line width: %d bytes\n",
+				 i + 1, fb->pitches[i]);
+		regmap_write(mixer->engine.regs,
+			     SUN8I_MIXER_CHAN_VI_LAYER_PITCH(channel,
+							     overlay, i),
+	       fb->pitches[i]);
+
+		DRM_DEBUG_DRIVER("Setting %d. buffer address to %pad\n",
+				 i + 1, &paddr);
+
+		regmap_write(mixer->engine.regs,
+			     SUN8I_MIXER_CHAN_VI_LAYER_TOP_LADDR(channel,
+								 overlay, i),
+	       lower_32_bits(paddr));
+	}
+
+	return 0;
+}
+
+static int sun8i_vi_layer_atomic_check(struct drm_plane *plane,
+				       struct drm_plane_state *state)
+{
+	struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
+	struct drm_crtc *crtc = state->crtc;
+	struct drm_crtc_state *crtc_state;
+	int min_scale, max_scale;
+
+	if (!crtc)
+		return 0;
+
+	crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
+	if (WARN_ON(!crtc_state))
+		return -EINVAL;
+
+	min_scale = DRM_PLANE_HELPER_NO_SCALING;
+	max_scale = DRM_PLANE_HELPER_NO_SCALING;
+
+	if (layer->mixer->cfg->scaler_mask & BIT(layer->channel)) {
+		min_scale = SUN8I_VI_SCALER_SCALE_MIN;
+		max_scale = SUN8I_VI_SCALER_SCALE_MAX;
+	}
+
+	return drm_atomic_helper_check_plane_state(state, crtc_state,
+						   min_scale, max_scale,
+						   true, true);
+}
+
+static void sun8i_vi_layer_atomic_disable(struct drm_plane *plane,
+					  struct drm_plane_state *old_state)
+{
+	struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
+	unsigned int old_zpos = old_state->normalized_zpos;
+	struct sun8i_mixer *mixer = layer->mixer;
+
+	sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay, false, 0,
+			      old_zpos);
+}
+
+static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
+					 struct drm_plane_state *old_state)
+{
+	struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
+	unsigned int zpos = plane->state->normalized_zpos;
+	unsigned int old_zpos = old_state->normalized_zpos;
+	struct sun8i_mixer *mixer = layer->mixer;
+
+	if (!plane->state->visible) {
+		sun8i_vi_layer_enable(mixer, layer->channel,
+				      layer->overlay, false, 0, old_zpos);
+		return;
+	}
+
+	sun8i_vi_layer_update_coord(mixer, layer->channel,
+				    layer->overlay, plane, zpos);
+	sun8i_vi_layer_update_formats(mixer, layer->channel,
+				      layer->overlay, plane);
+	sun8i_vi_layer_update_buffer(mixer, layer->channel,
+				     layer->overlay, plane);
+	sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay,
+			      true, zpos, old_zpos);
+}
+
+static struct drm_plane_helper_funcs sun8i_vi_layer_helper_funcs = {
+	.atomic_check	= sun8i_vi_layer_atomic_check,
+	.atomic_disable	= sun8i_vi_layer_atomic_disable,
+	.atomic_update	= sun8i_vi_layer_atomic_update,
+};
+
+static const struct drm_plane_funcs sun8i_vi_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,
+};
+
+/*
+ * While DE2 VI layer supports same RGB formats as UI layer, alpha
+ * channel is ignored. This structure lists all unique variants
+ * where alpha channel is replaced with "don't care" (X) channel.
+ */
+static const u32 sun8i_vi_layer_formats[] = {
+	DRM_FORMAT_BGR565,
+	DRM_FORMAT_BGR888,
+	DRM_FORMAT_BGRX4444,
+	DRM_FORMAT_BGRX5551,
+	DRM_FORMAT_BGRX8888,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_RGB888,
+	DRM_FORMAT_RGBX4444,
+	DRM_FORMAT_RGBX5551,
+	DRM_FORMAT_RGBX8888,
+	DRM_FORMAT_XBGR1555,
+	DRM_FORMAT_XBGR4444,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_XRGB1555,
+	DRM_FORMAT_XRGB4444,
+	DRM_FORMAT_XRGB8888,
+
+	DRM_FORMAT_NV16,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_NV21,
+	DRM_FORMAT_NV61,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_YUV411,
+	DRM_FORMAT_YUV420,
+	DRM_FORMAT_YUV422,
+	DRM_FORMAT_YVU411,
+	DRM_FORMAT_YVU420,
+	DRM_FORMAT_YVU422,
+};
+
+struct sun8i_vi_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
+					       struct sun8i_mixer *mixer,
+					       int index)
+{
+	struct sun8i_vi_layer *layer;
+	unsigned int plane_cnt;
+	int ret;
+
+	layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
+	if (!layer)
+		return ERR_PTR(-ENOMEM);
+
+	/* possible crtcs are set later */
+	ret = drm_universal_plane_init(drm, &layer->plane, 0,
+				       &sun8i_vi_layer_funcs,
+				       sun8i_vi_layer_formats,
+				       ARRAY_SIZE(sun8i_vi_layer_formats),
+				       NULL, DRM_PLANE_TYPE_OVERLAY, NULL);
+	if (ret) {
+		dev_err(drm->dev, "Couldn't initialize layer\n");
+		return ERR_PTR(ret);
+	}
+
+	plane_cnt = mixer->cfg->ui_num + mixer->cfg->vi_num;
+
+	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_vi_layer_helper_funcs);
+	layer->mixer = mixer;
+	layer->channel = index;
+	layer->overlay = 0;
+
+	return layer;
+}