From 2ccebf561e4a9024c8477459acf9b6176c4b40c7 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:16 +0200
Subject: drm/ast: Move cursor functions to ast_cursor.c

The cursor manipulation functions are unrelated to modesetting. Move
them into their own file.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-2-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 218 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 218 insertions(+)
 create mode 100644 drivers/gpu/drm/ast/ast_cursor.c

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
new file mode 100644
index 000000000000..53bb6eebc7cd
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ * Parts based on xf86-video-ast
+ * Copyright (c) 2005 ASPEED Technology Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ */
+/*
+ * Authors: Dave Airlie <airlied@redhat.com>
+ */
+
+#include <drm/drm_gem_vram_helper.h>
+
+#include "ast_drv.h"
+
+/*
+ * Allocate cursor BOs and pins them at the end of VRAM.
+ */
+int ast_cursor_init(struct drm_device *dev)
+{
+	struct ast_private *ast = to_ast_private(dev);
+	size_t size, i;
+	struct drm_gem_vram_object *gbo;
+	int ret;
+
+	size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE);
+
+	for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) {
+		gbo = drm_gem_vram_create(dev, size, 0);
+		if (IS_ERR(gbo)) {
+			ret = PTR_ERR(gbo);
+			goto err_drm_gem_vram_put;
+		}
+		ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM |
+					    DRM_GEM_VRAM_PL_FLAG_TOPDOWN);
+		if (ret) {
+			drm_gem_vram_put(gbo);
+			goto err_drm_gem_vram_put;
+		}
+
+		ast->cursor.gbo[i] = gbo;
+	}
+
+	return 0;
+
+err_drm_gem_vram_put:
+	while (i) {
+		--i;
+		gbo = ast->cursor.gbo[i];
+		drm_gem_vram_unpin(gbo);
+		drm_gem_vram_put(gbo);
+		ast->cursor.gbo[i] = NULL;
+	}
+	return ret;
+}
+
+void ast_cursor_fini(struct drm_device *dev)
+{
+	struct ast_private *ast = to_ast_private(dev);
+	size_t i;
+	struct drm_gem_vram_object *gbo;
+
+	for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) {
+		gbo = ast->cursor.gbo[i];
+		drm_gem_vram_unpin(gbo);
+		drm_gem_vram_put(gbo);
+	}
+}
+
+static u32 copy_cursor_image(u8 *src, u8 *dst, int width, int height)
+{
+	union {
+		u32 ul;
+		u8 b[4];
+	} srcdata32[2], data32;
+	union {
+		u16 us;
+		u8 b[2];
+	} data16;
+	u32 csum = 0;
+	s32 alpha_dst_delta, last_alpha_dst_delta;
+	u8 *srcxor, *dstxor;
+	int i, j;
+	u32 per_pixel_copy, two_pixel_copy;
+
+	alpha_dst_delta = AST_MAX_HWC_WIDTH << 1;
+	last_alpha_dst_delta = alpha_dst_delta - (width << 1);
+
+	srcxor = src;
+	dstxor = (u8 *)dst + last_alpha_dst_delta + (AST_MAX_HWC_HEIGHT - height) * alpha_dst_delta;
+	per_pixel_copy = width & 1;
+	two_pixel_copy = width >> 1;
+
+	for (j = 0; j < height; j++) {
+		for (i = 0; i < two_pixel_copy; i++) {
+			srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0;
+			srcdata32[1].ul = *((u32 *)(srcxor + 4)) & 0xf0f0f0f0;
+			data32.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4);
+			data32.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4);
+			data32.b[2] = srcdata32[1].b[1] | (srcdata32[1].b[0] >> 4);
+			data32.b[3] = srcdata32[1].b[3] | (srcdata32[1].b[2] >> 4);
+
+			writel(data32.ul, dstxor);
+			csum += data32.ul;
+
+			dstxor += 4;
+			srcxor += 8;
+
+		}
+
+		for (i = 0; i < per_pixel_copy; i++) {
+			srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0;
+			data16.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4);
+			data16.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4);
+			writew(data16.us, dstxor);
+			csum += (u32)data16.us;
+
+			dstxor += 2;
+			srcxor += 4;
+		}
+		dstxor += last_alpha_dst_delta;
+	}
+	return csum;
+}
+
+int ast_cursor_update(void *dst, void *src, unsigned int width,
+		      unsigned int height)
+{
+	u32 csum;
+
+	/* do data transfer to cursor cache */
+	csum = copy_cursor_image(src, dst, width, height);
+
+	/* write checksum + signature */
+	dst += AST_HWC_SIZE;
+	writel(csum, dst);
+	writel(width, dst + AST_HWC_SIGNATURE_SizeX);
+	writel(height, dst + AST_HWC_SIGNATURE_SizeY);
+	writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTX);
+	writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTY);
+
+	return 0;
+}
+
+void ast_cursor_set_base(struct ast_private *ast, u64 address)
+{
+	u8 addr0 = (address >> 3) & 0xff;
+	u8 addr1 = (address >> 11) & 0xff;
+	u8 addr2 = (address >> 19) & 0xff;
+
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc8, addr0);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc9, addr1);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xca, addr2);
+}
+
+int ast_cursor_move(struct drm_crtc *crtc, int x, int y)
+{
+	struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
+	struct ast_private *ast = to_ast_private(crtc->dev);
+	struct drm_gem_vram_object *gbo;
+	int x_offset, y_offset;
+	u8 *dst, *sig;
+	u8 jreg;
+
+	gbo = ast->cursor.gbo[ast->cursor.next_index];
+	dst = drm_gem_vram_vmap(gbo);
+	if (IS_ERR(dst))
+		return PTR_ERR(dst);
+
+	sig = dst + AST_HWC_SIZE;
+	writel(x, sig + AST_HWC_SIGNATURE_X);
+	writel(y, sig + AST_HWC_SIGNATURE_Y);
+
+	x_offset = ast_crtc->offset_x;
+	y_offset = ast_crtc->offset_y;
+	if (x < 0) {
+		x_offset = (-x) + ast_crtc->offset_x;
+		x = 0;
+	}
+
+	if (y < 0) {
+		y_offset = (-y) + ast_crtc->offset_y;
+		y = 0;
+	}
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc2, x_offset);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc3, y_offset);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc4, (x & 0xff));
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc5, ((x >> 8) & 0x0f));
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc6, (y & 0xff));
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, ((y >> 8) & 0x07));
+
+	/* dummy write to fire HWC */
+	jreg = 0x02 |
+	       0x01; /* enable ARGB4444 cursor */
+	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, jreg);
+
+	drm_gem_vram_vunmap(gbo, dst);
+
+	return 0;
+}
-- 
cgit v1.2.3


From beb2355eecbf67d2fce79af73215c875173d9990 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:17 +0200
Subject: drm/ast: Pass struct ast_private instance to cursor init/fini
 functions

Removes some typecasting.

v2:
	* use to_ast_private() instead of struct drm_device.dev_private

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-3-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 7 +++----
 drivers/gpu/drm/ast/ast_drv.h    | 4 ++--
 drivers/gpu/drm/ast/ast_mode.c   | 6 ++++--
 3 files changed, 9 insertions(+), 8 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 53bb6eebc7cd..1d4f51a7fe22 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -34,9 +34,9 @@
 /*
  * Allocate cursor BOs and pins them at the end of VRAM.
  */
-int ast_cursor_init(struct drm_device *dev)
+int ast_cursor_init(struct ast_private *ast)
 {
-	struct ast_private *ast = to_ast_private(dev);
+	struct drm_device *dev = ast->dev;
 	size_t size, i;
 	struct drm_gem_vram_object *gbo;
 	int ret;
@@ -72,9 +72,8 @@ err_drm_gem_vram_put:
 	return ret;
 }
 
-void ast_cursor_fini(struct drm_device *dev)
+void ast_cursor_fini(struct ast_private *ast)
 {
-	struct ast_private *ast = to_ast_private(dev);
 	size_t i;
 	struct drm_gem_vram_object *gbo;
 
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 245ed2e2d775..f7b120f862a8 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -316,8 +316,8 @@ void ast_init_3rdtx(struct drm_device *dev);
 void ast_release_firmware(struct drm_device *dev);
 
 /* ast_cursor.c */
-int ast_cursor_init(struct drm_device *dev);
-void ast_cursor_fini(struct drm_device *dev);
+int ast_cursor_init(struct ast_private *ast);
+void ast_cursor_fini(struct ast_private *ast);
 int ast_cursor_update(void *dst, void *src, unsigned int width,
 		      unsigned int height);
 void ast_cursor_set_base(struct ast_private *ast, u64 address);
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index c8399699d773..e69965f5636d 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1149,7 +1149,7 @@ int ast_mode_init(struct drm_device *dev)
 	drm_plane_helper_add(&ast->cursor_plane,
 			     &ast_cursor_plane_helper_funcs);
 
-	ast_cursor_init(dev);
+	ast_cursor_init(ast);
 	ast_crtc_init(dev);
 	ast_encoder_init(dev);
 	ast_connector_init(dev);
@@ -1159,7 +1159,9 @@ int ast_mode_init(struct drm_device *dev)
 
 void ast_mode_fini(struct drm_device *dev)
 {
-	ast_cursor_fini(dev);
+	struct ast_private *ast = to_ast_private(dev);
+
+	ast_cursor_fini(ast);
 }
 
 static int get_clock(void *i2c_priv)
-- 
cgit v1.2.3


From dd004b9a5505f9810f66a9ddfbdf02978703f1f6 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:18 +0200
Subject: drm/ast: Move cursor fb pinning and mapping into helper

The new helper ast_cursor_blit() updates a cursor's backbuffer HW
BO from a framebuffer structure. The cursor plane's prepare_fb()
function now uses the new interface.

Pinning and mapping of BOs is done automatically by the helper. This
includes the source BO, which was not pinned by the original code in
prepare_fb().

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-4-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 57 ++++++++++++++++++++++++++++++++++++++--
 drivers/gpu/drm/ast/ast_drv.h    |  3 +--
 drivers/gpu/drm/ast/ast_mode.c   | 41 +++--------------------------
 3 files changed, 59 insertions(+), 42 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 1d4f51a7fe22..8f94d4712f66 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -140,8 +140,8 @@ static u32 copy_cursor_image(u8 *src, u8 *dst, int width, int height)
 	return csum;
 }
 
-int ast_cursor_update(void *dst, void *src, unsigned int width,
-		      unsigned int height)
+static int ast_cursor_update(void *dst, void *src, unsigned int width,
+			     unsigned int height)
 {
 	u32 csum;
 
@@ -159,6 +159,59 @@ int ast_cursor_update(void *dst, void *src, unsigned int width,
 	return 0;
 }
 
+int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
+{
+	struct drm_device *dev = ast->dev;
+	struct drm_gem_vram_object *gbo;
+	int ret;
+	void *src;
+	void *dst;
+
+	if (drm_WARN_ON_ONCE(dev, fb->width > AST_MAX_HWC_WIDTH) ||
+	    drm_WARN_ON_ONCE(dev, fb->height > AST_MAX_HWC_HEIGHT))
+		return -EINVAL;
+
+	gbo = drm_gem_vram_of_gem(fb->obj[0]);
+
+	ret = drm_gem_vram_pin(gbo, 0);
+	if (ret)
+		return ret;
+	src = drm_gem_vram_vmap(gbo);
+	if (IS_ERR(src)) {
+		ret = PTR_ERR(src);
+		goto err_drm_gem_vram_unpin;
+	}
+
+	dst = drm_gem_vram_vmap(ast->cursor.gbo[ast->cursor.next_index]);
+	if (IS_ERR(dst)) {
+		ret = PTR_ERR(dst);
+		goto err_drm_gem_vram_vunmap_src;
+	}
+
+	ret = ast_cursor_update(dst, src, fb->width, fb->height);
+	if (ret)
+		goto err_drm_gem_vram_vunmap_dst;
+
+	/*
+	 * Always unmap buffers here. Destination buffers are
+	 * perma-pinned while the driver is active. We're only
+	 * changing ref-counters here.
+	 */
+	drm_gem_vram_vunmap(ast->cursor.gbo[ast->cursor.next_index], dst);
+	drm_gem_vram_vunmap(gbo, src);
+	drm_gem_vram_unpin(gbo);
+
+	return 0;
+
+err_drm_gem_vram_vunmap_dst:
+	drm_gem_vram_vunmap(ast->cursor.gbo[ast->cursor.next_index], dst);
+err_drm_gem_vram_vunmap_src:
+	drm_gem_vram_vunmap(gbo, src);
+err_drm_gem_vram_unpin:
+	drm_gem_vram_unpin(gbo);
+	return ret;
+}
+
 void ast_cursor_set_base(struct ast_private *ast, u64 address)
 {
 	u8 addr0 = (address >> 3) & 0xff;
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index f7b120f862a8..9bc1bb76ec91 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -318,8 +318,7 @@ void ast_release_firmware(struct drm_device *dev);
 /* ast_cursor.c */
 int ast_cursor_init(struct ast_private *ast);
 void ast_cursor_fini(struct ast_private *ast);
-int ast_cursor_update(void *dst, void *src, unsigned int width,
-		      unsigned int height);
+int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb);
 void ast_cursor_set_base(struct ast_private *ast, u64 address);
 int ast_cursor_move(struct drm_crtc *crtc, int x, int y);
 
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index e69965f5636d..701211050832 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -611,56 +611,21 @@ static int
 ast_cursor_plane_helper_prepare_fb(struct drm_plane *plane,
 				   struct drm_plane_state *new_state)
 {
-	struct drm_device *dev = plane->dev;
 	struct drm_framebuffer *fb = new_state->fb;
 	struct drm_crtc *crtc = new_state->crtc;
-	struct drm_gem_vram_object *gbo;
 	struct ast_private *ast;
 	int ret;
-	void *src, *dst;
 
 	if (!crtc || !fb)
 		return 0;
 
-	if (drm_WARN_ON_ONCE(dev, fb->width > AST_MAX_HWC_WIDTH) ||
-	    drm_WARN_ON_ONCE(dev, fb->height > AST_MAX_HWC_HEIGHT))
-		return -EINVAL; /* BUG: didn't test in atomic_check() */
-
-	ast = to_ast_private(dev);
-
-	gbo = drm_gem_vram_of_gem(fb->obj[0]);
-	src = drm_gem_vram_vmap(gbo);
-	if (IS_ERR(src)) {
-		ret = PTR_ERR(src);
-		goto err_drm_gem_vram_unpin;
-	}
-
-	dst = drm_gem_vram_vmap(ast->cursor.gbo[ast->cursor.next_index]);
-	if (IS_ERR(dst)) {
-		ret = PTR_ERR(dst);
-		goto err_drm_gem_vram_vunmap_src;
-	}
+	ast = to_ast_private(plane->dev);
 
-	ret = ast_cursor_update(dst, src, fb->width, fb->height);
+	ret = ast_cursor_blit(ast, fb);
 	if (ret)
-		goto err_drm_gem_vram_vunmap_dst;
-
-	/* Always unmap buffers here. Destination buffers are
-	 * perma-pinned while the driver is active. We're only
-	 * changing ref-counters here.
-	 */
-	drm_gem_vram_vunmap(ast->cursor.gbo[ast->cursor.next_index], dst);
-	drm_gem_vram_vunmap(gbo, src);
+		return ret;
 
 	return 0;
-
-err_drm_gem_vram_vunmap_dst:
-	drm_gem_vram_vunmap(ast->cursor.gbo[ast->cursor.next_index], dst);
-err_drm_gem_vram_vunmap_src:
-	drm_gem_vram_vunmap(gbo, src);
-err_drm_gem_vram_unpin:
-	drm_gem_vram_unpin(gbo);
-	return ret;
 }
 
 static int ast_cursor_plane_helper_atomic_check(struct drm_plane *plane,
-- 
cgit v1.2.3


From 932a62aa3bfd96ec44799fec3523756e531988dc Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:19 +0200
Subject: drm/ast: Update cursor image and checksum from same function

Cursor image and checksum go hand in hand. Update both in the same
place. The helper cannot fail, so remove the return type.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-5-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 24 +++++-------------------
 1 file changed, 5 insertions(+), 19 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 8f94d4712f66..7474baddf048 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -84,7 +84,7 @@ void ast_cursor_fini(struct ast_private *ast)
 	}
 }
 
-static u32 copy_cursor_image(u8 *src, u8 *dst, int width, int height)
+static void update_cursor_image(u8 __iomem *dst, const u8 *src, int width, int height)
 {
 	union {
 		u32 ul;
@@ -96,7 +96,8 @@ static u32 copy_cursor_image(u8 *src, u8 *dst, int width, int height)
 	} data16;
 	u32 csum = 0;
 	s32 alpha_dst_delta, last_alpha_dst_delta;
-	u8 *srcxor, *dstxor;
+	u8 __iomem *dstxor;
+	const u8 *srcxor;
 	int i, j;
 	u32 per_pixel_copy, two_pixel_copy;
 
@@ -137,16 +138,6 @@ static u32 copy_cursor_image(u8 *src, u8 *dst, int width, int height)
 		}
 		dstxor += last_alpha_dst_delta;
 	}
-	return csum;
-}
-
-static int ast_cursor_update(void *dst, void *src, unsigned int width,
-			     unsigned int height)
-{
-	u32 csum;
-
-	/* do data transfer to cursor cache */
-	csum = copy_cursor_image(src, dst, width, height);
 
 	/* write checksum + signature */
 	dst += AST_HWC_SIZE;
@@ -155,8 +146,6 @@ static int ast_cursor_update(void *dst, void *src, unsigned int width,
 	writel(height, dst + AST_HWC_SIGNATURE_SizeY);
 	writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTX);
 	writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTY);
-
-	return 0;
 }
 
 int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
@@ -188,9 +177,8 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
 		goto err_drm_gem_vram_vunmap_src;
 	}
 
-	ret = ast_cursor_update(dst, src, fb->width, fb->height);
-	if (ret)
-		goto err_drm_gem_vram_vunmap_dst;
+	/* do data transfer to cursor BO */
+	update_cursor_image(dst, src, fb->width, fb->height);
 
 	/*
 	 * Always unmap buffers here. Destination buffers are
@@ -203,8 +191,6 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
 
 	return 0;
 
-err_drm_gem_vram_vunmap_dst:
-	drm_gem_vram_vunmap(ast->cursor.gbo[ast->cursor.next_index], dst);
 err_drm_gem_vram_vunmap_src:
 	drm_gem_vram_vunmap(gbo, src);
 err_drm_gem_vram_unpin:
-- 
cgit v1.2.3


From 75d9d8e66db834551e81e74e522c2900fe93ef5c Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:20 +0200
Subject: drm/ast: Move cursor pageflip into helper

The new helper ast_cursor_page_flip() switches the cursor's front and
back BOs. This simplifies the cursor plane's update helper.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-6-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 20 +++++++++++++++++++-
 drivers/gpu/drm/ast/ast_drv.h    |  2 +-
 drivers/gpu/drm/ast/ast_mode.c   | 12 +-----------
 3 files changed, 21 insertions(+), 13 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 7474baddf048..815d95b2f392 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -198,7 +198,7 @@ err_drm_gem_vram_unpin:
 	return ret;
 }
 
-void ast_cursor_set_base(struct ast_private *ast, u64 address)
+static void ast_cursor_set_base(struct ast_private *ast, u64 address)
 {
 	u8 addr0 = (address >> 3) & 0xff;
 	u8 addr1 = (address >> 11) & 0xff;
@@ -209,6 +209,24 @@ void ast_cursor_set_base(struct ast_private *ast, u64 address)
 	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xca, addr2);
 }
 
+void ast_cursor_page_flip(struct ast_private *ast)
+{
+	struct drm_device *dev = ast->dev;
+	struct drm_gem_vram_object *gbo;
+	s64 off;
+
+	gbo = ast->cursor.gbo[ast->cursor.next_index];
+
+	off = drm_gem_vram_offset(gbo);
+	if (drm_WARN_ON_ONCE(dev, off < 0))
+		return; /* Bug: we didn't pin the cursor HW BO to VRAM. */
+
+	ast_cursor_set_base(ast, off);
+
+	++ast->cursor.next_index;
+	ast->cursor.next_index %= ARRAY_SIZE(ast->cursor.gbo);
+}
+
 int ast_cursor_move(struct drm_crtc *crtc, int x, int y)
 {
 	struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 9bc1bb76ec91..e973c1ab96cb 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -319,7 +319,7 @@ void ast_release_firmware(struct drm_device *dev);
 int ast_cursor_init(struct ast_private *ast);
 void ast_cursor_fini(struct ast_private *ast);
 int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb);
-void ast_cursor_set_base(struct ast_private *ast, u64 address);
+void ast_cursor_page_flip(struct ast_private *ast);
 int ast_cursor_move(struct drm_crtc *crtc, int x, int y);
 
 #endif
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 701211050832..32365f16c78c 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -660,14 +660,11 @@ static void
 ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
 				      struct drm_plane_state *old_state)
 {
-	struct drm_device *dev = plane->dev;
 	struct drm_plane_state *state = plane->state;
 	struct drm_crtc *crtc = state->crtc;
 	struct drm_framebuffer *fb = state->fb;
 	struct ast_private *ast = to_ast_private(plane->dev);
 	struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
-	struct drm_gem_vram_object *gbo;
-	s64 off;
 	u8 jreg;
 
 	ast_crtc->offset_x = AST_MAX_HWC_WIDTH - fb->width;
@@ -675,14 +672,7 @@ ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
 
 	if (state->fb != old_state->fb) {
 		/* A new cursor image was installed. */
-		gbo = ast->cursor.gbo[ast->cursor.next_index];
-		off = drm_gem_vram_offset(gbo);
-		if (drm_WARN_ON_ONCE(dev, off < 0))
-			return; /* Bug: we didn't pin cursor HW BO to VRAM. */
-		ast_cursor_set_base(ast, off);
-
-		++ast->cursor.next_index;
-		ast->cursor.next_index %= ARRAY_SIZE(ast->cursor.gbo);
+		ast_cursor_page_flip(ast);
 	}
 
 	ast_cursor_move(crtc, state->crtc_x, state->crtc_y);
-- 
cgit v1.2.3


From 81039adc92cd7a1eb99a6c53f33376e972d96971 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:21 +0200
Subject: drm/ast: Replace ast_cursor_move() with ast_cursor_show()

Having a cursor move function is misleading, as it actually enables the
cursor's image for displaying. So rename it to ast_cursor_show(). It's
semantics is to show a cursor at the specified location on the screen.
The displayed cursor is always the image in the cursor front BO.

This change also simplifies struct ast_crtc to being a mere wrapper around
around struct drm_crtc. It will be removed by a later patch.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-7-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 42 ++++++++++++++++++++++++++--------------
 drivers/gpu/drm/ast/ast_drv.h    |  4 ++--
 drivers/gpu/drm/ast/ast_mode.c   | 12 ++++++------
 3 files changed, 35 insertions(+), 23 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 815d95b2f392..8f8fdc831830 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -227,12 +227,27 @@ void ast_cursor_page_flip(struct ast_private *ast)
 	ast->cursor.next_index %= ARRAY_SIZE(ast->cursor.gbo);
 }
 
-int ast_cursor_move(struct drm_crtc *crtc, int x, int y)
+static void ast_cursor_set_location(struct ast_private *ast, u16 x, u16 y,
+				    u8 x_offset, u8 y_offset)
+{
+	u8 x0 = (x & 0x00ff);
+	u8 x1 = (x & 0x0f00) >> 8;
+	u8 y0 = (y & 0x00ff);
+	u8 y1 = (y & 0x0700) >> 8;
+
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc2, x_offset);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc3, y_offset);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc4, x0);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc5, x1);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc6, y0);
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, y1);
+}
+
+int ast_cursor_show(struct ast_private *ast, int x, int y,
+		    unsigned int offset_x, unsigned int offset_y)
 {
-	struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
-	struct ast_private *ast = to_ast_private(crtc->dev);
 	struct drm_gem_vram_object *gbo;
-	int x_offset, y_offset;
+	u8 x_offset, y_offset;
 	u8 *dst, *sig;
 	u8 jreg;
 
@@ -245,23 +260,20 @@ int ast_cursor_move(struct drm_crtc *crtc, int x, int y)
 	writel(x, sig + AST_HWC_SIGNATURE_X);
 	writel(y, sig + AST_HWC_SIGNATURE_Y);
 
-	x_offset = ast_crtc->offset_x;
-	y_offset = ast_crtc->offset_y;
 	if (x < 0) {
-		x_offset = (-x) + ast_crtc->offset_x;
+		x_offset = (-x) + offset_x;
 		x = 0;
+	} else {
+		x_offset = offset_x;
 	}
-
 	if (y < 0) {
-		y_offset = (-y) + ast_crtc->offset_y;
+		y_offset = (-y) + offset_y;
 		y = 0;
+	} else {
+		y_offset = offset_y;
 	}
-	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc2, x_offset);
-	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc3, y_offset);
-	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc4, (x & 0xff));
-	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc5, ((x >> 8) & 0x0f));
-	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc6, (y & 0xff));
-	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, ((y >> 8) & 0x07));
+
+	ast_cursor_set_location(ast, x, y, x_offset, y_offset);
 
 	/* dummy write to fire HWC */
 	jreg = 0x02 |
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index e973c1ab96cb..b00091798ef5 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -239,7 +239,6 @@ struct ast_connector {
 
 struct ast_crtc {
 	struct drm_crtc base;
-	u8 offset_x, offset_y;
 };
 
 #define to_ast_crtc(x) container_of(x, struct ast_crtc, base)
@@ -320,6 +319,7 @@ int ast_cursor_init(struct ast_private *ast);
 void ast_cursor_fini(struct ast_private *ast);
 int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb);
 void ast_cursor_page_flip(struct ast_private *ast);
-int ast_cursor_move(struct drm_crtc *crtc, int x, int y);
+int ast_cursor_show(struct ast_private *ast, int x, int y,
+		    unsigned int offset_x, unsigned int offset_y);
 
 #endif
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 32365f16c78c..b452f9e28d7c 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -661,21 +661,21 @@ ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
 				      struct drm_plane_state *old_state)
 {
 	struct drm_plane_state *state = plane->state;
-	struct drm_crtc *crtc = state->crtc;
 	struct drm_framebuffer *fb = state->fb;
-	struct ast_private *ast = to_ast_private(plane->dev);
-	struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
+	struct ast_private *ast = plane->dev->dev_private;
+	unsigned int offset_x, offset_y;
 	u8 jreg;
 
-	ast_crtc->offset_x = AST_MAX_HWC_WIDTH - fb->width;
-	ast_crtc->offset_y = AST_MAX_HWC_WIDTH - fb->height;
+	offset_x = AST_MAX_HWC_WIDTH - fb->width;
+	offset_y = AST_MAX_HWC_WIDTH - fb->height;
 
 	if (state->fb != old_state->fb) {
 		/* A new cursor image was installed. */
 		ast_cursor_page_flip(ast);
 	}
 
-	ast_cursor_move(crtc, state->crtc_x, state->crtc_y);
+	ast_cursor_show(ast, state->crtc_x, state->crtc_y,
+			offset_x, offset_y);
 
 	jreg = 0x2;
 	/* enable ARGB cursor */
-- 
cgit v1.2.3


From c91eadd110463f4455483ab7bc5c5e7cea28a906 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:23 +0200
Subject: drm/ast: Add helper to hide cursor

As the inverse to ast_cursor_show(), ast_cursor_hide() disables the
HW cursor.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-9-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 5 +++++
 drivers/gpu/drm/ast/ast_drv.h    | 1 +
 drivers/gpu/drm/ast/ast_mode.c   | 2 +-
 3 files changed, 7 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 8f8fdc831830..5421241015d6 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -284,3 +284,8 @@ int ast_cursor_show(struct ast_private *ast, int x, int y,
 
 	return 0;
 }
+
+void ast_cursor_hide(struct ast_private *ast)
+{
+	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, 0x00);
+}
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index b00091798ef5..92af0637ac48 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -321,5 +321,6 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb);
 void ast_cursor_page_flip(struct ast_private *ast);
 int ast_cursor_show(struct ast_private *ast, int x, int y,
 		    unsigned int offset_x, unsigned int offset_y);
+void ast_cursor_hide(struct ast_private *ast);
 
 #endif
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 5c41a91f5630..8fdc46401814 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -683,7 +683,7 @@ ast_cursor_plane_helper_atomic_disable(struct drm_plane *plane,
 {
 	struct ast_private *ast = to_ast_private(plane->dev);
 
-	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, 0x00);
+	ast_cursor_hide(ast);
 }
 
 static const struct drm_plane_helper_funcs ast_cursor_plane_helper_funcs = {
-- 
cgit v1.2.3


From 0d384eec10ea723f39df9736a04966e047850cfb Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:24 +0200
Subject: drm/ast: Keep cursor HW BOs mapped

Updating the image in a cursor's HW BO requires a mapping of the BO's
buffer in the kernel's address space. Cursor image updates can happen
frequently and create CPU overhead.

As cursor HW BOs are small and never move, they are now map exactly
once during the initialization and the mapping is used throughout the
driver's lifetime.

This change also removes a possible source of failures from
ast_cursor_show(). As the helper does not establish mappings, it cannot
fail. As a result, the cursor plane's atomic-update helper does not
call any failable interfaces. All failures are detected before trying
to update the cursor plane.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-10-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 44 ++++++++++++++++------------------------
 drivers/gpu/drm/ast/ast_drv.h    |  5 +++--
 2 files changed, 21 insertions(+), 28 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 5421241015d6..35680402e410 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -39,6 +39,7 @@ int ast_cursor_init(struct ast_private *ast)
 	struct drm_device *dev = ast->dev;
 	size_t size, i;
 	struct drm_gem_vram_object *gbo;
+	void __iomem *vaddr;
 	int ret;
 
 	size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE);
@@ -55,8 +56,16 @@ int ast_cursor_init(struct ast_private *ast)
 			drm_gem_vram_put(gbo);
 			goto err_drm_gem_vram_put;
 		}
+		vaddr = drm_gem_vram_vmap(gbo);
+		if (IS_ERR(vaddr)) {
+			ret = PTR_ERR(vaddr);
+			drm_gem_vram_unpin(gbo);
+			drm_gem_vram_put(gbo);
+			goto err_drm_gem_vram_put;
+		}
 
 		ast->cursor.gbo[i] = gbo;
+		ast->cursor.vaddr[i] = vaddr;
 	}
 
 	return 0;
@@ -65,9 +74,11 @@ err_drm_gem_vram_put:
 	while (i) {
 		--i;
 		gbo = ast->cursor.gbo[i];
+		drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]);
 		drm_gem_vram_unpin(gbo);
 		drm_gem_vram_put(gbo);
 		ast->cursor.gbo[i] = NULL;
+		ast->cursor.vaddr[i] = NULL;
 	}
 	return ret;
 }
@@ -79,6 +90,7 @@ void ast_cursor_fini(struct ast_private *ast)
 
 	for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) {
 		gbo = ast->cursor.gbo[i];
+		drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]);
 		drm_gem_vram_unpin(gbo);
 		drm_gem_vram_put(gbo);
 	}
@@ -154,7 +166,7 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
 	struct drm_gem_vram_object *gbo;
 	int ret;
 	void *src;
-	void *dst;
+	void __iomem *dst;
 
 	if (drm_WARN_ON_ONCE(dev, fb->width > AST_MAX_HWC_WIDTH) ||
 	    drm_WARN_ON_ONCE(dev, fb->height > AST_MAX_HWC_HEIGHT))
@@ -171,28 +183,16 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
 		goto err_drm_gem_vram_unpin;
 	}
 
-	dst = drm_gem_vram_vmap(ast->cursor.gbo[ast->cursor.next_index]);
-	if (IS_ERR(dst)) {
-		ret = PTR_ERR(dst);
-		goto err_drm_gem_vram_vunmap_src;
-	}
+	dst = ast->cursor.vaddr[ast->cursor.next_index];
 
 	/* do data transfer to cursor BO */
 	update_cursor_image(dst, src, fb->width, fb->height);
 
-	/*
-	 * Always unmap buffers here. Destination buffers are
-	 * perma-pinned while the driver is active. We're only
-	 * changing ref-counters here.
-	 */
-	drm_gem_vram_vunmap(ast->cursor.gbo[ast->cursor.next_index], dst);
 	drm_gem_vram_vunmap(gbo, src);
 	drm_gem_vram_unpin(gbo);
 
 	return 0;
 
-err_drm_gem_vram_vunmap_src:
-	drm_gem_vram_vunmap(gbo, src);
 err_drm_gem_vram_unpin:
 	drm_gem_vram_unpin(gbo);
 	return ret;
@@ -243,18 +243,14 @@ static void ast_cursor_set_location(struct ast_private *ast, u16 x, u16 y,
 	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, y1);
 }
 
-int ast_cursor_show(struct ast_private *ast, int x, int y,
-		    unsigned int offset_x, unsigned int offset_y)
+void ast_cursor_show(struct ast_private *ast, int x, int y,
+		     unsigned int offset_x, unsigned int offset_y)
 {
-	struct drm_gem_vram_object *gbo;
 	u8 x_offset, y_offset;
-	u8 *dst, *sig;
+	u8 __iomem *dst, __iomem *sig;
 	u8 jreg;
 
-	gbo = ast->cursor.gbo[ast->cursor.next_index];
-	dst = drm_gem_vram_vmap(gbo);
-	if (IS_ERR(dst))
-		return PTR_ERR(dst);
+	dst = ast->cursor.vaddr[ast->cursor.next_index];
 
 	sig = dst + AST_HWC_SIZE;
 	writel(x, sig + AST_HWC_SIGNATURE_X);
@@ -279,10 +275,6 @@ int ast_cursor_show(struct ast_private *ast, int x, int y,
 	jreg = 0x02 |
 	       0x01; /* enable ARGB4444 cursor */
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, jreg);
-
-	drm_gem_vram_vunmap(gbo, dst);
-
-	return 0;
 }
 
 void ast_cursor_hide(struct ast_private *ast)
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 92af0637ac48..f465e0c0984b 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -116,6 +116,7 @@ struct ast_private {
 
 	struct {
 		struct drm_gem_vram_object *gbo[AST_DEFAULT_HWC_NUM];
+		void __iomem *vaddr[AST_DEFAULT_HWC_NUM];
 		unsigned int next_index;
 	} cursor;
 
@@ -319,8 +320,8 @@ int ast_cursor_init(struct ast_private *ast);
 void ast_cursor_fini(struct ast_private *ast);
 int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb);
 void ast_cursor_page_flip(struct ast_private *ast);
-int ast_cursor_show(struct ast_private *ast, int x, int y,
-		    unsigned int offset_x, unsigned int offset_y);
+void ast_cursor_show(struct ast_private *ast, int x, int y,
+		     unsigned int offset_x, unsigned int offset_y);
 void ast_cursor_hide(struct ast_private *ast);
 
 #endif
-- 
cgit v1.2.3


From 3e9d787371eaa842682bf4fc86ae9475548d9cee Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Thu, 2 Jul 2020 13:50:25 +0200
Subject: drm/ast: Managed cursor release

Register a release function to finalize cursors. The _fini() function
gets un-exported from the source file.

The function ast_mode_fini() is now empty and will be removed by a
later patch.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-11-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_cursor.c | 38 ++++++++++++++++++++++----------------
 drivers/gpu/drm/ast/ast_drv.h    |  1 -
 drivers/gpu/drm/ast/ast_mode.c   |  3 ---
 3 files changed, 22 insertions(+), 20 deletions(-)

(limited to 'drivers/gpu/drm/ast/ast_cursor.c')

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index 35680402e410..acf0d23514e8 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -28,9 +28,30 @@
  */
 
 #include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_managed.h>
 
 #include "ast_drv.h"
 
+static void ast_cursor_fini(struct ast_private *ast)
+{
+	size_t i;
+	struct drm_gem_vram_object *gbo;
+
+	for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) {
+		gbo = ast->cursor.gbo[i];
+		drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]);
+		drm_gem_vram_unpin(gbo);
+		drm_gem_vram_put(gbo);
+	}
+}
+
+static void ast_cursor_release(struct drm_device *dev, void *ptr)
+{
+	struct ast_private *ast = dev->dev_private;
+
+	ast_cursor_fini(ast);
+}
+
 /*
  * Allocate cursor BOs and pins them at the end of VRAM.
  */
@@ -68,7 +89,7 @@ int ast_cursor_init(struct ast_private *ast)
 		ast->cursor.vaddr[i] = vaddr;
 	}
 
-	return 0;
+	return drmm_add_action_or_reset(dev, ast_cursor_release, NULL);
 
 err_drm_gem_vram_put:
 	while (i) {
@@ -77,25 +98,10 @@ err_drm_gem_vram_put:
 		drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]);
 		drm_gem_vram_unpin(gbo);
 		drm_gem_vram_put(gbo);
-		ast->cursor.gbo[i] = NULL;
-		ast->cursor.vaddr[i] = NULL;
 	}
 	return ret;
 }
 
-void ast_cursor_fini(struct ast_private *ast)
-{
-	size_t i;
-	struct drm_gem_vram_object *gbo;
-
-	for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) {
-		gbo = ast->cursor.gbo[i];
-		drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]);
-		drm_gem_vram_unpin(gbo);
-		drm_gem_vram_put(gbo);
-	}
-}
-
 static void update_cursor_image(u8 __iomem *dst, const u8 *src, int width, int height)
 {
 	union {
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index f465e0c0984b..ea4de3dce2c4 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -317,7 +317,6 @@ void ast_release_firmware(struct drm_device *dev);
 
 /* ast_cursor.c */
 int ast_cursor_init(struct ast_private *ast);
-void ast_cursor_fini(struct ast_private *ast);
 int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb);
 void ast_cursor_page_flip(struct ast_private *ast);
 void ast_cursor_show(struct ast_private *ast, int x, int y,
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 8fdc46401814..4724a38c001a 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1108,9 +1108,6 @@ int ast_mode_init(struct drm_device *dev)
 
 void ast_mode_fini(struct drm_device *dev)
 {
-	struct ast_private *ast = to_ast_private(dev);
-
-	ast_cursor_fini(ast);
 }
 
 static int get_clock(void *i2c_priv)
-- 
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