[PATCH 1/6] drm/gem: shadow_fb_access: Prepare imported buffers for CPU access
Noralf Trønnes via B4 Submission Endpoint
devnull at kernel.org
Tue Nov 22 20:58:39 UTC 2022
From: Noralf Trønnes <noralf at tronnes.org>
Complete the shadow fb access functions by also preparing imported buffers
for CPU access. Update the affected drivers that currently use
drm_gem_fb_begin_cpu_access().
Through this change the following SHMEM drivers will now also make sure
their imported buffers are prepared for CPU access: cirrus, hyperv,
mgag200, vkms
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Javier Martinez Canillas <javierm at redhat.com>
Cc: Hans de Goede <hdegoede at redhat.com>
Cc: Dave Airlie <airlied at redhat.com>
Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
drivers/gpu/drm/drm_gem_atomic_helper.c | 13 ++++++++++++-
drivers/gpu/drm/solomon/ssd130x.c | 10 +---------
drivers/gpu/drm/tiny/gm12u320.c | 10 +---------
drivers/gpu/drm/tiny/ofdrm.c | 10 ++--------
drivers/gpu/drm/tiny/simpledrm.c | 10 ++--------
drivers/gpu/drm/udl/udl_modeset.c | 11 ++---------
6 files changed, 20 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c
index e42800718f51..0eef4bb30d25 100644
--- a/drivers/gpu/drm/drm_gem_atomic_helper.c
+++ b/drivers/gpu/drm/drm_gem_atomic_helper.c
@@ -368,6 +368,7 @@ EXPORT_SYMBOL(drm_gem_reset_shadow_plane);
* maps all buffer objects of the plane's framebuffer into kernel address
* space and stores them in struct &drm_shadow_plane_state.map. The first data
* bytes are available in struct &drm_shadow_plane_state.data.
+ * It also prepares imported buffers for CPU access.
*
* See drm_gem_end_shadow_fb_access() for cleanup.
*
@@ -378,11 +379,20 @@ int drm_gem_begin_shadow_fb_access(struct drm_plane *plane, struct drm_plane_sta
{
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
struct drm_framebuffer *fb = plane_state->fb;
+ int ret;
if (!fb)
return 0;
- return drm_gem_fb_vmap(fb, shadow_plane_state->map, shadow_plane_state->data);
+ ret = drm_gem_fb_vmap(fb, shadow_plane_state->map, shadow_plane_state->data);
+ if (ret)
+ return ret;
+
+ ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+ if (ret)
+ drm_gem_fb_vunmap(fb, shadow_plane_state->map);
+
+ return ret;
}
EXPORT_SYMBOL(drm_gem_begin_shadow_fb_access);
@@ -404,6 +414,7 @@ void drm_gem_end_shadow_fb_access(struct drm_plane *plane, struct drm_plane_stat
if (!fb)
return;
+ drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
drm_gem_fb_vunmap(fb, shadow_plane_state->map);
}
EXPORT_SYMBOL(drm_gem_end_shadow_fb_access);
diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c
index 53464afc2b9a..58a2f0113f24 100644
--- a/drivers/gpu/drm/solomon/ssd130x.c
+++ b/drivers/gpu/drm/solomon/ssd130x.c
@@ -544,7 +544,6 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m
struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev);
struct iosys_map dst;
unsigned int dst_pitch;
- int ret = 0;
u8 *buf = NULL;
/* Align y to display page boundaries */
@@ -556,21 +555,14 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m
if (!buf)
return -ENOMEM;
- ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
- if (ret)
- goto out_free;
-
iosys_map_set_vaddr(&dst, buf);
drm_fb_xrgb8888_to_mono(&dst, &dst_pitch, vmap, fb, rect);
- drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
-
ssd130x_update_rect(ssd130x, buf, rect);
-out_free:
kfree(buf);
- return ret;
+ return 0;
}
static void ssd130x_primary_plane_helper_atomic_update(struct drm_plane *plane,
diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
index 130fd07a967d..59aad4b468cc 100644
--- a/drivers/gpu/drm/tiny/gm12u320.c
+++ b/drivers/gpu/drm/tiny/gm12u320.c
@@ -252,7 +252,7 @@ static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)
static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
{
- int block, dst_offset, len, remain, ret, x1, x2, y1, y2;
+ int block, dst_offset, len, remain, x1, x2, y1, y2;
struct drm_framebuffer *fb;
void *vaddr;
u8 *src;
@@ -269,12 +269,6 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
y2 = gm12u320->fb_update.rect.y2;
vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */
- ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
- if (ret) {
- GM12U320_ERR("drm_gem_fb_begin_cpu_access err: %d\n", ret);
- goto put_fb;
- }
-
src = vaddr + y1 * fb->pitches[0] + x1 * 4;
x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
@@ -309,8 +303,6 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
src += fb->pitches[0];
}
- drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
-put_fb:
drm_framebuffer_put(fb);
gm12u320->fb_update.fb = NULL;
unlock:
diff --git a/drivers/gpu/drm/tiny/ofdrm.c b/drivers/gpu/drm/tiny/ofdrm.c
index dc9e4d71b12a..ed3072563db9 100644
--- a/drivers/gpu/drm/tiny/ofdrm.c
+++ b/drivers/gpu/drm/tiny/ofdrm.c
@@ -820,14 +820,10 @@ static void ofdrm_primary_plane_helper_atomic_update(struct drm_plane *plane,
const struct drm_format_info *dst_format = odev->format;
struct drm_atomic_helper_damage_iter iter;
struct drm_rect damage;
- int ret, idx;
-
- ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
- if (ret)
- return;
+ int idx;
if (!drm_dev_enter(dev, &idx))
- goto out_drm_gem_fb_end_cpu_access;
+ return;
drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
drm_atomic_for_each_plane_damage(&iter, &damage) {
@@ -843,8 +839,6 @@ static void ofdrm_primary_plane_helper_atomic_update(struct drm_plane *plane,
}
drm_dev_exit(idx);
-out_drm_gem_fb_end_cpu_access:
- drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
}
static void ofdrm_primary_plane_helper_atomic_disable(struct drm_plane *plane,
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 162eb44dcba8..1c0d9e277dc3 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -481,14 +481,10 @@ static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane
struct simpledrm_device *sdev = simpledrm_device_of_dev(dev);
struct drm_atomic_helper_damage_iter iter;
struct drm_rect damage;
- int ret, idx;
-
- ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
- if (ret)
- return;
+ int idx;
if (!drm_dev_enter(dev, &idx))
- goto out_drm_gem_fb_end_cpu_access;
+ return;
drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
drm_atomic_for_each_plane_damage(&iter, &damage) {
@@ -504,8 +500,6 @@ static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane
}
drm_dev_exit(idx);
-out_drm_gem_fb_end_cpu_access:
- drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
}
static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plane,
diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
index 4b79d44752c9..022b18aa3f48 100644
--- a/drivers/gpu/drm/udl/udl_modeset.c
+++ b/drivers/gpu/drm/udl/udl_modeset.c
@@ -271,17 +271,13 @@ static void udl_primary_plane_helper_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
struct drm_atomic_helper_damage_iter iter;
struct drm_rect damage;
- int ret, idx;
+ int idx;
if (!fb)
return; /* no framebuffer; plane is disabled */
- ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
- if (ret)
- return;
-
if (!drm_dev_enter(dev, &idx))
- goto out_drm_gem_fb_end_cpu_access;
+ return;
drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
drm_atomic_for_each_plane_damage(&iter, &damage) {
@@ -289,9 +285,6 @@ static void udl_primary_plane_helper_atomic_update(struct drm_plane *plane,
}
drm_dev_exit(idx);
-
-out_drm_gem_fb_end_cpu_access:
- drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
}
static const struct drm_plane_helper_funcs udl_primary_plane_helper_funcs = {
--
b4 0.10.1
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