[2/2] drm/rockchip: Add support for afbc

Submitted by Andrzej Pietrasiewicz on Oct. 11, 2019, 11:18 a.m.

Details

Message ID 20191011111813.20851-3-andrzej.p@collabora.com
State New
Headers show
Series "AFBC for Rockchip" ( rev: 9 8 7 6 5 4 3 2 1 ) in DRI devel

Not browsing as part of any series.

Commit Message

Andrzej Pietrasiewicz Oct. 11, 2019, 11:18 a.m.
This patch adds support for afbc handling. afbc is a compressed format
which reduces the necessary memory bandwidth.

Co-developed-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
---
 drivers/gpu/drm/rockchip/Kconfig            |   1 +
 drivers/gpu/drm/rockchip/rockchip_drm_fb.c  |  43 ++++++
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 140 +++++++++++++++++++-
 drivers/gpu/drm/rockchip/rockchip_drm_vop.h |  12 ++
 drivers/gpu/drm/rockchip/rockchip_vop_reg.c |  86 +++++++++++-
 5 files changed, 278 insertions(+), 4 deletions(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 6f4222f8beeb..ff491efc52a5 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -5,6 +5,7 @@  config DRM_ROCKCHIP
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_PANEL
+	select DRM_AFBC
 	select VIDEOMODE_HELPERS
 	select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP
 	select DRM_DW_HDMI if ROCKCHIP_DW_HDMI
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index 64ca87cf6d50..873185b3a721 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -8,6 +8,7 @@ 
 #include <drm/drm.h>
 #include <drm/drmP.h>
 #include <drm/drm_atomic.h>
+#include <drm/drm_afbc.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
@@ -18,6 +19,8 @@ 
 #include "rockchip_drm_gem.h"
 #include "rockchip_drm_psr.h"
 
+#define ROCKCHIP_MAX_AFBC_WIDTH	2560
+
 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
 	.destroy       = drm_gem_fb_destroy,
 	.create_handle = drm_gem_fb_create_handle,
@@ -32,6 +35,46 @@  rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cm
 	int ret;
 	int i;
 
+	if (mode_cmd->modifier[0]) {
+		const struct drm_format_info *info;
+		int bpp;
+
+		if (mode_cmd->modifier[0] &
+			~DRM_FORMAT_MOD_ARM_AFBC(
+				AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
+				AFBC_FORMAT_MOD_SPARSE
+			 )
+		) {
+			DRM_DEV_ERROR(dev->dev,
+				"Unsupported format modifer 0x%llx\n",
+				mode_cmd->modifier[0]
+			);
+
+			return ERR_PTR(-EINVAL);
+		}
+
+		if (!drm_afbc_check_offset(dev, mode_cmd))
+			return ERR_PTR(-EINVAL);
+
+		if (!drm_afbc_check_size_align(dev, mode_cmd))
+			return ERR_PTR(-EINVAL);
+
+		if (mode_cmd->width > ROCKCHIP_MAX_AFBC_WIDTH) {
+			DRM_DEV_ERROR(dev->dev,
+				"Unsupported width %d>%d\n",
+				mode_cmd->width,
+				ROCKCHIP_MAX_AFBC_WIDTH);
+
+			return ERR_PTR(-EINVAL);
+		}
+
+		info = drm_get_format_info(dev, mode_cmd);
+		bpp = info->cpp[0] * 8;
+
+		if (!drm_afbc_check_fb_size(dev, mode_cmd, obj[0], bpp))
+			return ERR_PTR(-EINVAL);
+	}
+
 	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 	if (!fb)
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 21b68eea46cc..0ac9ab3be3f1 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -90,9 +90,20 @@ 
 #define VOP_WIN_TO_INDEX(vop_win) \
 	((vop_win) - (vop_win)->vop->win)
 
+#define VOP_AFBC_SET(vop, name, v) \
+	do { \
+		if ((vop)->data->afbc) \
+			vop_reg_set((vop), &(vop)->data->afbc->name, \
+				0, ~0, v, #name); \
+	} while (0)
+
 #define to_vop(x) container_of(x, struct vop, crtc)
 #define to_vop_win(x) container_of(x, struct vop_win, base)
 
+#define AFBC_FMT_RGB565		0x0
+#define AFBC_FMT_U8U8U8U8	0x5
+#define AFBC_FMT_U8U8U8		0x4
+
 /*
  * The coefficients of the following matrix are all fixed points.
  * The format is S2.10 for the 3x3 part of the matrix, and S9.12 for the offsets.
@@ -163,6 +174,7 @@  struct vop {
 	/* optional internal rgb encoder */
 	struct rockchip_rgb *rgb;
 
+	struct vop_win *afbc_win;
 	struct vop_win win[];
 };
 
@@ -271,6 +283,27 @@  static enum vop_data_format vop_convert_format(uint32_t format)
 	}
 }
 
+static int vop_convert_afbc_format(uint32_t format)
+{
+	switch (format) {
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_ARGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_ABGR8888:
+		return AFBC_FMT_U8U8U8U8;
+	case DRM_FORMAT_RGB888:
+	case DRM_FORMAT_BGR888:
+		return AFBC_FMT_U8U8U8;
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_BGR565:
+		return AFBC_FMT_RGB565;
+	default:
+		DRM_ERROR("unsupported afbc format[%08x]\n", format);
+	}
+
+	return -EINVAL;
+}
+
 static uint16_t scl_vop_cal_scale(enum scale_mode mode, uint32_t src,
 				  uint32_t dst, bool is_horizontal,
 				  int vsu_mode, int *vskiplines)
@@ -587,6 +620,15 @@  static int vop_enable(struct drm_crtc *crtc)
 
 		vop_win_disable(vop, win);
 	}
+
+	if (vop->data->afbc) {
+		/*
+		 * Disable AFBC and forget there was a vop window with AFBC
+		 */
+		VOP_AFBC_SET(vop, enable, 0);
+		vop->afbc_win = NULL;
+	}
+
 	spin_unlock(&vop->reg_lock);
 
 	vop_cfg_done(vop);
@@ -671,6 +713,36 @@  static void vop_plane_destroy(struct drm_plane *plane)
 	drm_plane_cleanup(plane);
 }
 
+static bool rockchip_mod_supported(struct drm_plane *plane,
+				   u32 format, u64 modifier)
+{
+	const struct drm_format_info *info;
+
+	if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
+		return false;
+
+	if (modifier == DRM_FORMAT_MOD_LINEAR)
+		return true;
+
+	if (modifier & ~DRM_FORMAT_MOD_ARM_AFBC(
+				AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
+				AFBC_FORMAT_MOD_SPARSE
+			)
+	) {
+		DRM_DEBUG_KMS("Unsupported format modifer 0x%llx\n", modifier);
+
+		return false;
+	}
+
+	info = drm_format_info(format);
+	if (info->num_planes != 1) {
+		DRM_DEBUG_KMS("AFBC buffers expect one plane\n");
+		return false;
+	}
+
+	return true;
+}
+
 static int vop_plane_atomic_check(struct drm_plane *plane,
 			   struct drm_plane_state *state)
 {
@@ -719,6 +791,33 @@  static int vop_plane_atomic_check(struct drm_plane *plane,
 		return -EINVAL;
 	}
 
+	if (fb->modifier == DRM_FORMAT_MOD_ARM_AFBC(
+		AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 | AFBC_FORMAT_MOD_SPARSE)) {
+		struct vop *vop = to_vop(crtc);
+
+		if (!vop->data->afbc) {
+			DRM_ERROR("vop does not support AFBC\n");
+			return -EINVAL;
+		}
+
+		ret = vop_convert_afbc_format(fb->format->format);
+		if (ret < 0)
+			return ret;
+
+		if (state->src.x1 || state->src.y1) {
+			DRM_ERROR("afbc does not support offset display\n");
+			DRM_ERROR("xpos=%d, ypos=%d, offset=%d\n",
+				  state->src.x1, state->src.y1, fb->offsets[0]);
+			return -EINVAL;
+		}
+
+		if (state->rotation && state->rotation != DRM_MODE_ROTATE_0) {
+			DRM_ERROR("afbc does not support rotation\n");
+			DRM_ERROR("rotation=%d\n", state->rotation);
+			return -EINVAL;
+		}
+	}
+
 	return 0;
 }
 
@@ -735,6 +834,11 @@  static void vop_plane_atomic_disable(struct drm_plane *plane,
 	spin_lock(&vop->reg_lock);
 
 	vop_win_disable(vop, win);
+	/*
+	 * Forget about the AFBC window if it is being disabled
+	 */
+	if (vop_win == vop->afbc_win)
+		vop->afbc_win = NULL;
 
 	spin_unlock(&vop->reg_lock);
 }
@@ -774,6 +878,13 @@  static void vop_plane_atomic_update(struct drm_plane *plane,
 	if (WARN_ON(!vop->is_enabled))
 		return;
 
+	/*
+	 * If updating the AFBC window then assume that
+	 * after the update there will be no AFBC window.
+	 */
+	if (vop_win == vop->afbc_win)
+		vop->afbc_win = NULL;
+
 	if (!state->visible) {
 		vop_plane_atomic_disable(plane, old_state);
 		return;
@@ -808,6 +919,24 @@  static void vop_plane_atomic_update(struct drm_plane *plane,
 
 	spin_lock(&vop->reg_lock);
 
+	if (fb->modifier == DRM_FORMAT_MOD_ARM_AFBC(
+		AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 | AFBC_FORMAT_MOD_SPARSE)) {
+		int afbc_format = vop_convert_afbc_format(fb->format->format);
+
+		VOP_AFBC_SET(vop, format, afbc_format | 1 << 4);
+		VOP_AFBC_SET(vop, hreg_block_split, 0);
+		VOP_AFBC_SET(vop, win_sel, VOP_WIN_TO_INDEX(vop_win));
+		VOP_AFBC_SET(vop, hdr_ptr, dma_addr);
+		VOP_AFBC_SET(vop, pic_size, act_info);
+
+		/*
+		 * The window being udated becomes the AFBC window
+		 */
+		vop->afbc_win = vop_win;
+
+		pr_info("AFBC on plane %s\n", plane->name);
+	}
+
 	VOP_WIN_SET(vop, win, format, format);
 	VOP_WIN_SET(vop, win, yrgb_vir, DIV_ROUND_UP(fb->pitches[0], 4));
 	VOP_WIN_SET(vop, win, yrgb_mst, dma_addr);
@@ -964,6 +1093,7 @@  static const struct drm_plane_funcs vop_plane_funcs = {
 	.reset = drm_atomic_helper_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+	.format_mod_supported = rockchip_mod_supported,
 };
 
 static int vop_crtc_enable_vblank(struct drm_crtc *crtc)
@@ -1163,6 +1293,10 @@  static void vop_crtc_atomic_flush(struct drm_crtc *crtc,
 
 	spin_lock(&vop->reg_lock);
 
+	/*
+	 * Enable AFBC if there is some AFBC window, disable otherwise
+	 */
+	VOP_AFBC_SET(vop, enable, vop->afbc_win != NULL);
 	vop_cfg_done(vop);
 
 	spin_unlock(&vop->reg_lock);
@@ -1471,7 +1605,8 @@  static int vop_create_crtc(struct vop *vop)
 					       0, &vop_plane_funcs,
 					       win_data->phy->data_formats,
 					       win_data->phy->nformats,
-					       NULL, win_data->type, NULL);
+					       win_data->phy->format_modifiers,
+					       win_data->type, NULL);
 		if (ret) {
 			DRM_DEV_ERROR(vop->dev, "failed to init plane %d\n",
 				      ret);
@@ -1511,7 +1646,8 @@  static int vop_create_crtc(struct vop *vop)
 					       &vop_plane_funcs,
 					       win_data->phy->data_formats,
 					       win_data->phy->nformats,
-					       NULL, win_data->type, NULL);
+					       win_data->phy->format_modifiers,
+					       win_data->type, NULL);
 		if (ret) {
 			DRM_DEV_ERROR(vop->dev, "failed to init overlay %d\n",
 				      ret);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
index 2149a889c29d..371b28b933a9 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -34,6 +34,16 @@  struct vop_reg {
 	bool relaxed;
 };
 
+struct vop_afbc {
+	struct vop_reg enable;
+	struct vop_reg win_sel;
+	struct vop_reg format;
+	struct vop_reg hreg_block_split;
+	struct vop_reg pic_size;
+	struct vop_reg hdr_ptr;
+	struct vop_reg rstn;
+};
+
 struct vop_modeset {
 	struct vop_reg htotal_pw;
 	struct vop_reg hact_st_end;
@@ -128,6 +138,7 @@  struct vop_win_phy {
 	const struct vop_scl_regs *scl;
 	const uint32_t *data_formats;
 	uint32_t nformats;
+	const uint64_t *format_modifiers;
 
 	struct vop_reg enable;
 	struct vop_reg gate;
@@ -167,6 +178,7 @@  struct vop_data {
 	const struct vop_misc *misc;
 	const struct vop_modeset *modeset;
 	const struct vop_output *output;
+	const struct vop_afbc *afbc;
 	const struct vop_win_yuv2yuv_data *win_yuv2yuv;
 	const struct vop_win_data *win;
 	unsigned int win_size;
diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
index 7b9c74750f6d..a3981f037c90 100644
--- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
+++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
@@ -44,6 +44,20 @@  static const uint32_t formats_win_full[] = {
 	DRM_FORMAT_NV24,
 };
 
+static const uint64_t format_modifiers_win_full[] = {
+	DRM_FORMAT_MOD_NONE,
+	DRM_FORMAT_MOD_INVALID,
+};
+
+static const uint64_t format_modifiers_win_full_afbc[] = {
+	DRM_FORMAT_MOD_ARM_AFBC(
+		AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
+		AFBC_FORMAT_MOD_SPARSE
+	),
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID,
+};
+
 static const uint32_t formats_win_lite[] = {
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_ARGB8888,
@@ -55,6 +69,11 @@  static const uint32_t formats_win_lite[] = {
 	DRM_FORMAT_BGR565,
 };
 
+static const uint64_t format_modifiers_win_lite[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID,
+};
+
 static const struct vop_scl_regs rk3036_win_scl = {
 	.scale_yrgb_x = VOP_REG(RK3036_WIN0_SCL_FACTOR_YRGB, 0xffff, 0x0),
 	.scale_yrgb_y = VOP_REG(RK3036_WIN0_SCL_FACTOR_YRGB, 0xffff, 16),
@@ -66,6 +85,7 @@  static const struct vop_win_phy rk3036_win0_data = {
 	.scl = &rk3036_win_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(RK3036_SYS_CTRL, 0x1, 0),
 	.format = VOP_REG(RK3036_SYS_CTRL, 0x7, 3),
 	.rb_swap = VOP_REG(RK3036_SYS_CTRL, 0x1, 15),
@@ -81,6 +101,7 @@  static const struct vop_win_phy rk3036_win0_data = {
 static const struct vop_win_phy rk3036_win1_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.enable = VOP_REG(RK3036_SYS_CTRL, 0x1, 1),
 	.format = VOP_REG(RK3036_SYS_CTRL, 0x7, 6),
 	.rb_swap = VOP_REG(RK3036_SYS_CTRL, 0x1, 19),
@@ -147,6 +168,7 @@  static const struct vop_data rk3036_vop = {
 static const struct vop_win_phy rk3126_win1_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.enable = VOP_REG(RK3036_SYS_CTRL, 0x1, 1),
 	.format = VOP_REG(RK3036_SYS_CTRL, 0x7, 6),
 	.rb_swap = VOP_REG(RK3036_SYS_CTRL, 0x1, 19),
@@ -226,6 +248,7 @@  static const struct vop_win_phy px30_win0_data = {
 	.scl = &px30_win_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(PX30_WIN0_CTRL0, 0x1, 0),
 	.format = VOP_REG(PX30_WIN0_CTRL0, 0x7, 1),
 	.rb_swap = VOP_REG(PX30_WIN0_CTRL0, 0x1, 12),
@@ -241,6 +264,7 @@  static const struct vop_win_phy px30_win0_data = {
 static const struct vop_win_phy px30_win1_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.enable = VOP_REG(PX30_WIN1_CTRL0, 0x1, 0),
 	.format = VOP_REG(PX30_WIN1_CTRL0, 0x7, 4),
 	.rb_swap = VOP_REG(PX30_WIN1_CTRL0, 0x1, 12),
@@ -253,6 +277,7 @@  static const struct vop_win_phy px30_win1_data = {
 static const struct vop_win_phy px30_win2_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.gate = VOP_REG(PX30_WIN2_CTRL0, 0x1, 4),
 	.enable = VOP_REG(PX30_WIN2_CTRL0, 0x1, 0),
 	.format = VOP_REG(PX30_WIN2_CTRL0, 0x3, 5),
@@ -308,6 +333,7 @@  static const struct vop_win_phy rk3066_win0_data = {
 	.scl = &rk3066_win_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(RK3066_SYS_CTRL1, 0x1, 0),
 	.format = VOP_REG(RK3066_SYS_CTRL0, 0x7, 4),
 	.rb_swap = VOP_REG(RK3066_SYS_CTRL0, 0x1, 19),
@@ -324,6 +350,7 @@  static const struct vop_win_phy rk3066_win1_data = {
 	.scl = &rk3066_win_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(RK3066_SYS_CTRL1, 0x1, 1),
 	.format = VOP_REG(RK3066_SYS_CTRL0, 0x7, 7),
 	.rb_swap = VOP_REG(RK3066_SYS_CTRL0, 0x1, 23),
@@ -339,6 +366,7 @@  static const struct vop_win_phy rk3066_win1_data = {
 static const struct vop_win_phy rk3066_win2_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.enable = VOP_REG(RK3066_SYS_CTRL1, 0x1, 2),
 	.format = VOP_REG(RK3066_SYS_CTRL0, 0x7, 10),
 	.rb_swap = VOP_REG(RK3066_SYS_CTRL0, 0x1, 27),
@@ -418,6 +446,7 @@  static const struct vop_win_phy rk3188_win0_data = {
 	.scl = &rk3188_win_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(RK3188_SYS_CTRL, 0x1, 0),
 	.format = VOP_REG(RK3188_SYS_CTRL, 0x7, 3),
 	.rb_swap = VOP_REG(RK3188_SYS_CTRL, 0x1, 15),
@@ -432,6 +461,7 @@  static const struct vop_win_phy rk3188_win0_data = {
 static const struct vop_win_phy rk3188_win1_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.enable = VOP_REG(RK3188_SYS_CTRL, 0x1, 1),
 	.format = VOP_REG(RK3188_SYS_CTRL, 0x7, 6),
 	.rb_swap = VOP_REG(RK3188_SYS_CTRL, 0x1, 19),
@@ -537,6 +567,7 @@  static const struct vop_win_phy rk3288_win01_data = {
 	.scl = &rk3288_win_full_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 0),
 	.format = VOP_REG(RK3288_WIN0_CTRL0, 0x7, 1),
 	.rb_swap = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 12),
@@ -555,6 +586,7 @@  static const struct vop_win_phy rk3288_win01_data = {
 static const struct vop_win_phy rk3288_win23_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.enable = VOP_REG(RK3288_WIN2_CTRL0, 0x1, 4),
 	.gate = VOP_REG(RK3288_WIN2_CTRL0, 0x1, 0),
 	.format = VOP_REG(RK3288_WIN2_CTRL0, 0x7, 1),
@@ -667,6 +699,7 @@  static const struct vop_win_phy rk3368_win01_data = {
 	.scl = &rk3288_win_full_scl,
 	.data_formats = formats_win_full,
 	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full,
 	.enable = VOP_REG(RK3368_WIN0_CTRL0, 0x1, 0),
 	.format = VOP_REG(RK3368_WIN0_CTRL0, 0x7, 1),
 	.rb_swap = VOP_REG(RK3368_WIN0_CTRL0, 0x1, 12),
@@ -687,6 +720,7 @@  static const struct vop_win_phy rk3368_win01_data = {
 static const struct vop_win_phy rk3368_win23_data = {
 	.data_formats = formats_win_lite,
 	.nformats = ARRAY_SIZE(formats_win_lite),
+	.format_modifiers = format_modifiers_win_lite,
 	.gate = VOP_REG(RK3368_WIN2_CTRL0, 0x1, 0),
 	.enable = VOP_REG(RK3368_WIN2_CTRL0, 0x1, 4),
 	.format = VOP_REG(RK3368_WIN2_CTRL0, 0x3, 5),
@@ -798,6 +832,53 @@  static const struct vop_win_yuv2yuv_data rk3399_vop_big_win_yuv2yuv_data[] = {
 	  .y2r_en = VOP_REG(RK3399_YUV2YUV_WIN, 0x1, 9) },
 	{ .base = 0xC0, .phy = &rk3399_yuv2yuv_win23_data },
 	{ .base = 0x120, .phy = &rk3399_yuv2yuv_win23_data },
+
+};
+
+static const struct vop_win_phy rk3399_win01_data = {
+	.scl = &rk3288_win_full_scl,
+	.data_formats = formats_win_full,
+	.nformats = ARRAY_SIZE(formats_win_full),
+	.format_modifiers = format_modifiers_win_full_afbc,
+	.enable = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 0),
+	.format = VOP_REG(RK3288_WIN0_CTRL0, 0x7, 1),
+	.rb_swap = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 12),
+	.y_mir_en = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 22),
+	.act_info = VOP_REG(RK3288_WIN0_ACT_INFO, 0x1fff1fff, 0),
+	.dsp_info = VOP_REG(RK3288_WIN0_DSP_INFO, 0x0fff0fff, 0),
+	.dsp_st = VOP_REG(RK3288_WIN0_DSP_ST, 0x1fff1fff, 0),
+	.yrgb_mst = VOP_REG(RK3288_WIN0_YRGB_MST, 0xffffffff, 0),
+	.uv_mst = VOP_REG(RK3288_WIN0_CBR_MST, 0xffffffff, 0),
+	.yrgb_vir = VOP_REG(RK3288_WIN0_VIR, 0x3fff, 0),
+	.uv_vir = VOP_REG(RK3288_WIN0_VIR, 0x3fff, 16),
+	.src_alpha_ctl = VOP_REG(RK3288_WIN0_SRC_ALPHA_CTRL, 0xff, 0),
+	.dst_alpha_ctl = VOP_REG(RK3288_WIN0_DST_ALPHA_CTRL, 0xff, 0),
+};
+
+/*
+ * rk3399 vop big windows register layout is same as rk3288, but we
+ * have a separate rk3399 win data array here so that we can advertise
+ * AFBC on the primary plane.
+ */
+static const struct vop_win_data rk3399_vop_win_data[] = {
+	{ .base = 0x00, .phy = &rk3399_win01_data,
+	  .type = DRM_PLANE_TYPE_PRIMARY },
+	{ .base = 0x40, .phy = &rk3288_win01_data,
+	  .type = DRM_PLANE_TYPE_OVERLAY },
+	{ .base = 0x00, .phy = &rk3288_win23_data,
+	  .type = DRM_PLANE_TYPE_OVERLAY },
+	{ .base = 0x50, .phy = &rk3288_win23_data,
+	  .type = DRM_PLANE_TYPE_CURSOR },
+};
+
+static const struct vop_afbc rk3399_vop_afbc = {
+	.rstn = VOP_REG(RK3399_AFBCD0_CTRL, 0x1, 3),
+	.enable = VOP_REG(RK3399_AFBCD0_CTRL, 0x1, 0),
+	.win_sel = VOP_REG(RK3399_AFBCD0_CTRL, 0x3, 1),
+	.format = VOP_REG(RK3399_AFBCD0_CTRL, 0x1f, 16),
+	.hreg_block_split = VOP_REG(RK3399_AFBCD0_CTRL, 0x1, 21),
+	.hdr_ptr = VOP_REG(RK3399_AFBCD0_HDR_PTR, 0xffffffff, 0),
+	.pic_size = VOP_REG(RK3399_AFBCD0_PIC_SIZE, 0xffffffff, 0),
 };
 
 static const struct vop_data rk3399_vop_big = {
@@ -807,9 +888,10 @@  static const struct vop_data rk3399_vop_big = {
 	.common = &rk3288_common,
 	.modeset = &rk3288_modeset,
 	.output = &rk3399_output,
+	.afbc = &rk3399_vop_afbc,
 	.misc = &rk3368_misc,
-	.win = rk3368_vop_win_data,
-	.win_size = ARRAY_SIZE(rk3368_vop_win_data),
+	.win = rk3399_vop_win_data,
+	.win_size = ARRAY_SIZE(rk3399_vop_win_data),
 	.win_yuv2yuv = rk3399_vop_big_win_yuv2yuv_data,
 };
 

Comments

Hi Andrzej,

On Fri, 11 Oct 2019 at 12:18, Andrzej Pietrasiewicz
<andrzej.p@collabora.com> wrote:
> @@ -32,6 +35,46 @@ rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cm
>         int ret;
>         int i;
>
> +       if (mode_cmd->modifier[0]) {
> +               const struct drm_format_info *info;
> +               int bpp;
> +
> +               if (mode_cmd->modifier[0] &

Use != here, not &~.

> +       case DRM_FORMAT_BGR888:
> +               return AFBC_FMT_U8U8U8;
> +       case DRM_FORMAT_RGB565:
> +       case DRM_FORMAT_BGR565:
> +               return AFBC_FMT_RGB565;
> +       default:
> +               DRM_ERROR("unsupported afbc format[%08x]\n", format);

This should not be reachable, because you shouldn't be able to create
a framebuffer with an unsupported format/modifier combination.

> +static bool rockchip_mod_supported(struct drm_plane *plane,
> +                                  u32 format, u64 modifier)
> +{
> +       const struct drm_format_info *info;
> +
> +       if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
> +               return false;
> +
> +       if (modifier == DRM_FORMAT_MOD_LINEAR)
> +               return true;
> +
> +       if (modifier & ~DRM_FORMAT_MOD_ARM_AFBC(

Again use != here.

> +                               AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
> +                               AFBC_FORMAT_MOD_SPARSE
> +                       )
> +       ) {
> +               DRM_DEBUG_KMS("Unsupported format modifer 0x%llx\n", modifier);
> +
> +               return false;
> +       }
> +
> +       info = drm_format_info(format);
> +       if (info->num_planes != 1) {
> +               DRM_DEBUG_KMS("AFBC buffers expect one plane\n");
> +               return false;
> +       }

This is where you should reject unsupported format + AFBC
combinations. Doing it here prevents it from ever being advertised to
userspace in the first place.

> @@ -808,6 +919,24 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
>
>         spin_lock(&vop->reg_lock);
>
> +       if (fb->modifier == DRM_FORMAT_MOD_ARM_AFBC(
> +               AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 | AFBC_FORMAT_MOD_SPARSE)) {
> +               int afbc_format = vop_convert_afbc_format(fb->format->format);
> +
> +               VOP_AFBC_SET(vop, format, afbc_format | 1 << 4);

I assume the (1 << 4) programs the 16x16 block size. Can we support
other block sizes?

> +               VOP_AFBC_SET(vop, hreg_block_split, 0);

Does this mean we can also support AFBC_FORMAT_MOD_SPLIT?

> +               VOP_AFBC_SET(vop, win_sel, VOP_WIN_TO_INDEX(vop_win));
> +               VOP_AFBC_SET(vop, hdr_ptr, dma_addr);
> +               VOP_AFBC_SET(vop, pic_size, act_info);
> +
> +               /*
> +                * The window being udated becomes the AFBC window
> +                */
> +               vop->afbc_win = vop_win;
> +
> +               pr_info("AFBC on plane %s\n", plane->name);

Please do not use pr_info() here. Userspace should not be able to
trigger logging, apart from DRM_DEBUG.

> +static const uint64_t format_modifiers_win_full[] = {
> +       DRM_FORMAT_MOD_NONE,

*DRM_FORMAT_MOD_LINEAR

Cheers,
Daniel