Hi
Am 05.11.19 um 10:55 schrieb Daniel Vetter:
> On Mon, Oct 28, 2019 at 04:49:27PM +0100, Thomas Zimmermann wrote:
>> The cursor plane uses an internal format of ARGB4444. To userspace, we
>> announce ARGB8888 and do the transformation internally.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
>
> Hm, might be fun to also expose the ARGB4444 directly. Not that anyone
> will actually use it :-/
Is that a serious proposal? I thought about ARGB4444 and quickly
dismissed it because no one will ever support it anyway.
Best regards
Thomas
> -Daniel
>
>> ---
>> drivers/gpu/drm/ast/ast_drv.h | 1 +
>> drivers/gpu/drm/ast/ast_mode.c | 161 ++++++++++++++++++++++++++++++++-
>> 2 files changed, 161 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
>> index 13560622f22a..49557a73390f 100644
>> --- a/drivers/gpu/drm/ast/ast_drv.h
>> +++ b/drivers/gpu/drm/ast/ast_drv.h
>> @@ -122,6 +122,7 @@ struct ast_private {
>> } cursor;
>>
>> struct drm_plane primary_plane;
>> + struct drm_plane cursor_plane;
>>
>> bool support_wide_screen;
>> enum {
>> diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
>> index 7667f4502eb9..f5f73200e8e4 100644
>> --- a/drivers/gpu/drm/ast/ast_mode.c
>> +++ b/drivers/gpu/drm/ast/ast_mode.c
>> @@ -54,6 +54,16 @@ static int ast_cursor_move(struct drm_crtc *crtc,
>> int x, int y);
>>
>>
>> +static u32 copy_cursor_image(u8 *src, u8 *dst, int width, int height);
>> +static int ast_cursor_update(void *dst, void *src, unsigned int width,
>> + unsigned int height);
>> +static void ast_cursor_set_base(struct ast_private *ast, u64 address);
>> +static int ast_show_cursor(struct drm_crtc *crtc, void *src,
>> + unsigned int width, unsigned int height);
>> +static void ast_hide_cursor(struct drm_crtc *crtc);
>> +static int ast_cursor_move(struct drm_crtc *crtc,
>> + int x, int y);
>> +
>> static inline void ast_load_palette_index(struct ast_private *ast,
>> u8 index, u8 red, u8 green,
>> u8 blue)
>> @@ -594,6 +604,139 @@ static const struct drm_plane_funcs ast_primary_plane_funcs = {
>> .format_mod_supported = NULL,
>> };
>>
>> +/*
>> + * Cursor plane
>> + */
>> +
>> +static int
>> +ast_cursor_plane_helper_prepare_fb(struct drm_plane *plane,
>> + struct drm_plane_state *new_state)
>> +{
>> + 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 (fb->width > AST_MAX_HWC_WIDTH || fb->height > AST_MAX_HWC_HEIGHT)
>> + return -EINVAL;
>> +
>> + ast = crtc->dev->dev_private;
>> +
>> + 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;
>> + }
>> +
>> + 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);
>> +
>> + 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,
>> + struct drm_plane_state *state)
>> +{
>> + return 0;
>> +}
>> +
>> +static void
>> +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 = plane->dev->dev_private;
>> + 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;
>> + ast_crtc->offset_y = AST_MAX_HWC_WIDTH - fb->height;
>> +
>> + 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 (WARN_ON_ONCE(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_move(crtc, state->crtc_x, state->crtc_y);
>> +
>> + jreg = 0x2;
>> + /* enable ARGB cursor */
>> + jreg |= 1;
>> + ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, jreg);
>> +}
>> +
>> +static void
>> +ast_cursor_plane_helper_atomic_disable(struct drm_plane *plane,
>> + struct drm_plane_state *old_state)
>> +{
>> + struct ast_private *ast = plane->dev->dev_private;
>> +
>> + ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, 0x00);
>> +}
>> +
>> +static const struct drm_plane_helper_funcs ast_cursor_plane_helper_funcs = {
>> + .prepare_fb = ast_cursor_plane_helper_prepare_fb,
>> + .cleanup_fb = NULL, /* not required for cursor plane */
>> + .atomic_check = ast_cursor_plane_helper_atomic_check,
>> + .atomic_update = ast_cursor_plane_helper_atomic_update,
>> + .atomic_disable = ast_cursor_plane_helper_atomic_disable,
>> +};
>> +
>> +static const struct drm_plane_funcs ast_cursor_plane_funcs = {
>> + .update_plane = drm_atomic_helper_update_plane,
>> + .disable_plane = drm_atomic_helper_disable_plane,
>> + .destroy = drm_plane_cleanup,
>> + .reset = drm_atomic_helper_plane_reset,
>> + .set_property = NULL,
>> + .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
>> + .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
>> + .atomic_set_property = NULL,
>> + .atomic_get_property = NULL,
>> + .late_register = NULL,
>> + .early_unregister = NULL,
>> + .atomic_print_state = NULL,
>> + .format_mod_supported = NULL,
>> +};
>> +
>> /*
>> * CRTC
>> */
>> @@ -883,7 +1026,8 @@ static int ast_crtc_init(struct drm_device *dev)
>> return -ENOMEM;
>>
>> ret = drm_crtc_init_with_planes(dev, &crtc->base, &ast->primary_plane,
>> - NULL, &ast_crtc_funcs, NULL);
>> + &ast->cursor_plane, &ast_crtc_funcs,
>> + NULL);
>> if (ret)
>> goto err_kfree;
>>
>> @@ -1153,6 +1297,9 @@ int ast_mode_init(struct drm_device *dev)
>> DRM_FORMAT_RGB565,
>> DRM_FORMAT_C8,
>> };
>> + static const uint32_t cursor_plane_formats[] = {
>> + DRM_FORMAT_ARGB8888,
>> + };
>>
>> struct ast_private *ast = dev->dev_private;
>> int ret;
>> @@ -1170,6 +1317,18 @@ int ast_mode_init(struct drm_device *dev)
>> drm_plane_helper_add(&ast->primary_plane,
>> &ast_primary_plane_helper_funcs);
>>
>> + ret = drm_universal_plane_init(dev, &ast->cursor_plane, 0x01,
>> + &ast_cursor_plane_funcs,
>> + cursor_plane_formats,
>> + ARRAY_SIZE(cursor_plane_formats),
>> + NULL, DRM_PLANE_TYPE_CURSOR, NULL);
>> + if (ret) {
>> + DRM_ERROR("drm_universal_plane_failed(): %d\n", ret);
>> + return ret;
>> + }
>> + drm_plane_helper_add(&ast->cursor_plane,
>> + &ast_cursor_plane_helper_funcs);
>> +
>> ast_cursor_init(dev);
>> ast_crtc_init(dev);
>> ast_encoder_init(dev);
>> --
>> 2.23.0
>>
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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