Use the buffer mappings provided by shadow-plane helpers. As the
mappings are established while the commit can still fail, errors
are now reported correctly to callers.

Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
---
 drivers/gpu/drm/drm_mipi_dbi.c | 31 +++++++++++--------------------
 drivers/gpu/drm/tiny/ili9225.c | 28 ++++++++++------------------
 drivers/gpu/drm/tiny/st7586.c  | 22 ++++++++++------------
 3 files changed, 31 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
index 3030344d25b48..d45824a65c9fd 100644
--- a/drivers/gpu/drm/drm_mipi_dbi.c
+++ b/drivers/gpu/drm/drm_mipi_dbi.c
@@ -323,12 +323,13 @@ EXPORT_SYMBOL(mipi_dbi_pipe_mode_valid);
 void mipi_dbi_pipe_update(struct drm_simple_display_pipe *pipe,
                          struct drm_plane_state *old_state)
 {
-       struct iosys_map map[DRM_FORMAT_MAX_PLANES];
-       struct iosys_map data[DRM_FORMAT_MAX_PLANES];
        struct drm_plane_state *state = pipe->plane.state;
+       struct mipi_dbi_plane_state *mipi_dbi_plane_state =
+               to_mipi_dbi_plane_state(state);
+       struct drm_shadow_plane_state *shadow_plane_state =
+               &mipi_dbi_plane_state->shadow_plane_state;
        struct drm_framebuffer *fb = state->fb;
        struct drm_rect rect;
-       int ret;
 
        if (!pipe->crtc.state->active)
                return;
@@ -336,14 +337,8 @@ void mipi_dbi_pipe_update(struct drm_simple_display_pipe 
*pipe,
        if (WARN_ON(!fb))
                return;
 
-       ret = drm_gem_fb_vmap(fb, map, data);
-       if (ret)
-               return;
-
        if (drm_atomic_helper_damage_merged(old_state, state, &rect))
-               mipi_dbi_fb_dirty(&data[0], fb, &rect);
-
-       drm_gem_fb_vunmap(fb, map);
+               mipi_dbi_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
 }
 EXPORT_SYMBOL(mipi_dbi_pipe_update);
 
@@ -364,6 +359,10 @@ void mipi_dbi_enable_flush(struct mipi_dbi_dev *dbidev,
                           struct drm_crtc_state *crtc_state,
                           struct drm_plane_state *plane_state)
 {
+       struct mipi_dbi_plane_state *mipi_dbi_plane_state =
+               to_mipi_dbi_plane_state(plane_state);
+       struct drm_shadow_plane_state *shadow_plane_state =
+               &mipi_dbi_plane_state->shadow_plane_state;
        struct drm_framebuffer *fb = plane_state->fb;
        struct drm_rect rect = {
                .x1 = 0,
@@ -371,22 +370,14 @@ void mipi_dbi_enable_flush(struct mipi_dbi_dev *dbidev,
                .y1 = 0,
                .y2 = fb->height,
        };
-       struct iosys_map map[DRM_FORMAT_MAX_PLANES];
-       struct iosys_map data[DRM_FORMAT_MAX_PLANES];
-       int idx, ret;
+       int idx;
 
        if (!drm_dev_enter(&dbidev->drm, &idx))
                return;
 
-       ret = drm_gem_fb_vmap(fb, map, data);
-       if (ret)
-               goto err_drm_dev_exit;
-
-       mipi_dbi_fb_dirty(&data[0], fb, &rect);
+       mipi_dbi_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
        backlight_enable(dbidev->backlight);
 
-       drm_gem_fb_vunmap(fb, map);
-err_drm_dev_exit:
        drm_dev_exit(idx);
 }
 EXPORT_SYMBOL(mipi_dbi_enable_flush);
diff --git a/drivers/gpu/drm/tiny/ili9225.c b/drivers/gpu/drm/tiny/ili9225.c
index 9e55ce28b4552..ba5681b63ffbf 100644
--- a/drivers/gpu/drm/tiny/ili9225.c
+++ b/drivers/gpu/drm/tiny/ili9225.c
@@ -163,24 +163,19 @@ static void ili9225_fb_dirty(struct iosys_map *src, 
struct drm_framebuffer *fb,
 static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
                                struct drm_plane_state *old_state)
 {
-       struct iosys_map map[DRM_FORMAT_MAX_PLANES];
-       struct iosys_map data[DRM_FORMAT_MAX_PLANES];
        struct drm_plane_state *state = pipe->plane.state;
+       struct mipi_dbi_plane_state *mipi_dbi_plane_state =
+               to_mipi_dbi_plane_state(state);
+       struct drm_shadow_plane_state *shadow_plane_state =
+               &mipi_dbi_plane_state->shadow_plane_state;
        struct drm_framebuffer *fb = state->fb;
        struct drm_rect rect;
-       int ret;
 
        if (!pipe->crtc.state->active)
                return;
 
-       ret = drm_gem_fb_vmap(fb, map, data);
-       if (ret)
-               return;
-
        if (drm_atomic_helper_damage_merged(old_state, state, &rect))
-               ili9225_fb_dirty(&data[0], fb, &rect);
-
-       drm_gem_fb_vunmap(fb, map);
+               ili9225_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
 }
 
 static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
@@ -188,6 +183,10 @@ static void ili9225_pipe_enable(struct 
drm_simple_display_pipe *pipe,
                                struct drm_plane_state *plane_state)
 {
        struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+       struct mipi_dbi_plane_state *mipi_dbi_plane_state =
+               to_mipi_dbi_plane_state(plane_state);
+       struct drm_shadow_plane_state *shadow_plane_state =
+               &mipi_dbi_plane_state->shadow_plane_state;
        struct drm_framebuffer *fb = plane_state->fb;
        struct device *dev = pipe->crtc.dev->dev;
        struct mipi_dbi *dbi = &dbidev->dbi;
@@ -197,8 +196,6 @@ static void ili9225_pipe_enable(struct 
drm_simple_display_pipe *pipe,
                .y1 = 0,
                .y2 = fb->height,
        };
-       struct iosys_map map[DRM_FORMAT_MAX_PLANES];
-       struct iosys_map data[DRM_FORMAT_MAX_PLANES];
        int ret, idx;
        u8 am_id;
 
@@ -289,13 +286,8 @@ static void ili9225_pipe_enable(struct 
drm_simple_display_pipe *pipe,
 
        ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
 
-       ret = drm_gem_fb_vmap(fb, map, data);
-       if (ret)
-               goto out_exit;
-
-       ili9225_fb_dirty(&data[0], fb, &rect);
+       ili9225_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
 
-       drm_gem_fb_vunmap(fb, map);
 out_exit:
        drm_dev_exit(idx);
 }
diff --git a/drivers/gpu/drm/tiny/st7586.c b/drivers/gpu/drm/tiny/st7586.c
index 76b13cefc904f..ddaa82c2e58ae 100644
--- a/drivers/gpu/drm/tiny/st7586.c
+++ b/drivers/gpu/drm/tiny/st7586.c
@@ -153,19 +153,18 @@ static void st7586_pipe_update(struct 
drm_simple_display_pipe *pipe,
                               struct drm_plane_state *old_state)
 {
        struct drm_plane_state *state = pipe->plane.state;
+       struct mipi_dbi_plane_state *mipi_dbi_plane_state =
+               to_mipi_dbi_plane_state(state);
+       struct drm_shadow_plane_state *shadow_plane_state =
+               &mipi_dbi_plane_state->shadow_plane_state;
        struct drm_framebuffer *fb = state->fb;
-       struct drm_gem_dma_object *dma_obj;
-       struct iosys_map src;
        struct drm_rect rect;
 
        if (!pipe->crtc.state->active)
                return;
 
-       dma_obj = drm_fb_dma_get_gem_obj(fb, 0);
-       iosys_map_set_vaddr(&src, dma_obj->vaddr);
-
        if (drm_atomic_helper_damage_merged(old_state, state, &rect))
-               st7586_fb_dirty(&src, fb, &rect);
+               st7586_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
 }
 
 static void st7586_pipe_enable(struct drm_simple_display_pipe *pipe,
@@ -173,6 +172,10 @@ static void st7586_pipe_enable(struct 
drm_simple_display_pipe *pipe,
                               struct drm_plane_state *plane_state)
 {
        struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+       struct mipi_dbi_plane_state *mipi_dbi_plane_state =
+               to_mipi_dbi_plane_state(plane_state);
+       struct drm_shadow_plane_state *shadow_plane_state =
+               &mipi_dbi_plane_state->shadow_plane_state;
        struct drm_framebuffer *fb = plane_state->fb;
        struct mipi_dbi *dbi = &dbidev->dbi;
        struct drm_rect rect = {
@@ -181,8 +184,6 @@ static void st7586_pipe_enable(struct 
drm_simple_display_pipe *pipe,
                .y1 = 0,
                .y2 = fb->height,
        };
-       struct drm_gem_dma_object *dma_obj;
-       struct iosys_map src;
        int idx, ret;
        u8 addr_mode;
 
@@ -242,10 +243,7 @@ static void st7586_pipe_enable(struct 
drm_simple_display_pipe *pipe,
 
        msleep(100);
 
-       dma_obj = drm_fb_dma_get_gem_obj(fb, 0);
-       iosys_map_set_vaddr(&src, dma_obj->vaddr);
-
-       st7586_fb_dirty(&src, fb, &rect);
+       st7586_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
 
        mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
 out_exit:
-- 
2.38.1

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