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drm/mipi-dbi: Support shadow-plane state 

Implement MIPI DBI planes with struct drm_shadow_plane_state, so that the
respective drivers can use the vmap'ed GEM-buffer memory. Implement state
helpers, the {begin,end}_fb_access helpers and wire up everything.

With this commit, MIPI DBI drivers can access the GEM object's memory
that is provided by shadow-plane state. The actual changes to drivers
are implemented separately.

v2:
	* use shadow-plane state directly (Noralf)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Tested-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Noralf Trønnes <noralf@tronnes.org> # drm/tiny/mi0283qt
Link: https://patchwork.freedesktop.org/patch/msgid/20221202125644.7917-7-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-12-02 13:56:42 +01:00
parent b5f636e63b
commit e7caf04d49
4 changed files with 110 additions and 1 deletions
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85
drivers/gpu/drm/drm_mipi_dbi.c
View File

@ -21,6 +21,7 @@
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_modes.h>
@ -433,6 +434,90 @@ void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe)
}
EXPORT_SYMBOL(mipi_dbi_pipe_disable);
/**
* mipi_dbi_pipe_begin_fb_access - MIPI DBI pipe begin-access helper
* @pipe: Display pipe
* @plane_state: Plane state
*
* This function implements struct &drm_simple_display_funcs.begin_fb_access.
*
* See drm_gem_begin_shadow_fb_access() for details and mipi_dbi_pipe_cleanup_fb()
* for cleanup.
*
* Returns:
* 0 on success, or a negative errno code otherwise.
*/
int mipi_dbi_pipe_begin_fb_access(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state)
{
return drm_gem_begin_shadow_fb_access(&pipe->plane, plane_state);
}
EXPORT_SYMBOL(mipi_dbi_pipe_begin_fb_access);
/**
* mipi_dbi_pipe_end_fb_access - MIPI DBI pipe end-access helper
* @pipe: Display pipe
* @plane_state: Plane state
*
* This function implements struct &drm_simple_display_funcs.end_fb_access.
*
* See mipi_dbi_pipe_begin_fb_access().
*/
void mipi_dbi_pipe_end_fb_access(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state)
{
drm_gem_end_shadow_fb_access(&pipe->plane, plane_state);
}
EXPORT_SYMBOL(mipi_dbi_pipe_end_fb_access);
/**
* mipi_dbi_pipe_reset_plane - MIPI DBI plane-reset helper
* @pipe: Display pipe
*
* This function implements struct &drm_simple_display_funcs.reset_plane
* for MIPI DBI planes.
*/
void mipi_dbi_pipe_reset_plane(struct drm_simple_display_pipe *pipe)
{
drm_gem_reset_shadow_plane(&pipe->plane);
}
EXPORT_SYMBOL(mipi_dbi_pipe_reset_plane);
/**
* mipi_dbi_pipe_duplicate_plane_state - duplicates MIPI DBI plane state
* @pipe: Display pipe
*
* This function implements struct &drm_simple_display_funcs.duplicate_plane_state
* for MIPI DBI planes.
*
* See drm_gem_duplicate_shadow_plane_state() for additional details.
*
* Returns:
* A pointer to a new plane state on success, or NULL otherwise.
*/
struct drm_plane_state *mipi_dbi_pipe_duplicate_plane_state(struct drm_simple_display_pipe *pipe)
{
return drm_gem_duplicate_shadow_plane_state(&pipe->plane);
}
EXPORT_SYMBOL(mipi_dbi_pipe_duplicate_plane_state);
/**
* mipi_dbi_pipe_destroy_plane_state - cleans up MIPI DBI plane state
* @pipe: Display pipe
* @plane_state: Plane state
*
* This function implements struct drm_simple_display_funcs.destroy_plane_state
* for MIPI DBI planes.
*
* See drm_gem_destroy_shadow_plane_state() for additional details.
*/
void mipi_dbi_pipe_destroy_plane_state(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state)
{
drm_gem_destroy_shadow_plane_state(&pipe->plane, plane_state);
}
EXPORT_SYMBOL(mipi_dbi_pipe_destroy_plane_state);
static int mipi_dbi_connector_get_modes(struct drm_connector *connector)
{
struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(connector->dev);

5
drivers/gpu/drm/tiny/ili9225.c
View File

@ -343,6 +343,11 @@ static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
.enable = ili9225_pipe_enable,
.disable = ili9225_pipe_disable,
.update = ili9225_pipe_update,
.begin_fb_access = mipi_dbi_pipe_begin_fb_access,
.end_fb_access = mipi_dbi_pipe_end_fb_access,
.reset_plane = mipi_dbi_pipe_reset_plane,
.duplicate_plane_state = mipi_dbi_pipe_duplicate_plane_state,
.destroy_plane_state = mipi_dbi_pipe_destroy_plane_state,
};
static const struct drm_display_mode ili9225_mode = {

5
drivers/gpu/drm/tiny/st7586.c
View File

@ -277,6 +277,11 @@ static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
.enable = st7586_pipe_enable,
.disable = st7586_pipe_disable,
.update = st7586_pipe_update,
.begin_fb_access = mipi_dbi_pipe_begin_fb_access,
.end_fb_access = mipi_dbi_pipe_end_fb_access,
.reset_plane = mipi_dbi_pipe_reset_plane,
.duplicate_plane_state = mipi_dbi_pipe_duplicate_plane_state,
.destroy_plane_state = mipi_dbi_pipe_destroy_plane_state,
};
static const struct drm_display_mode st7586_mode = {

16
include/drm/drm_mipi_dbi.h
View File

@ -164,6 +164,15 @@ void mipi_dbi_enable_flush(struct mipi_dbi_dev *dbidev,
struct drm_crtc_state *crtc_state,
struct drm_plane_state *plan_state);
void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe);
int mipi_dbi_pipe_begin_fb_access(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state);
void mipi_dbi_pipe_end_fb_access(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state);
void mipi_dbi_pipe_reset_plane(struct drm_simple_display_pipe *pipe);
struct drm_plane_state *mipi_dbi_pipe_duplicate_plane_state(struct drm_simple_display_pipe *pipe);
void mipi_dbi_pipe_destroy_plane_state(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state);
void mipi_dbi_hw_reset(struct mipi_dbi *dbi);
bool mipi_dbi_display_is_on(struct mipi_dbi *dbi);
int mipi_dbi_poweron_reset(struct mipi_dbi_dev *dbidev);
@ -223,6 +232,11 @@ static inline void mipi_dbi_debugfs_init(struct drm_minor *minor) {}
.mode_valid = mipi_dbi_pipe_mode_valid, \
.enable = (enable_), \
.disable = mipi_dbi_pipe_disable, \
.update = mipi_dbi_pipe_update
.update = mipi_dbi_pipe_update, \
.begin_fb_access = mipi_dbi_pipe_begin_fb_access, \
.end_fb_access = mipi_dbi_pipe_end_fb_access, \
.reset_plane = mipi_dbi_pipe_reset_plane, \
.duplicate_plane_state = mipi_dbi_pipe_duplicate_plane_state, \
.destroy_plane_state = mipi_dbi_pipe_destroy_plane_state
#endif /* __LINUX_MIPI_DBI_H */