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drm/fb-helper: Add fill_info() functions 

The fbdev split between fix and var information is kinda
pointless for drm drivers since everything is fixed: The fbdev
emulation doesn't support changing modes at all.

Create a new simplified helper and use it in the generic fbdev
helper code. Follow-up patches will beef it up more and roll
it out to all drivers.

v2: We need to keep sizes, since they might not match the fb dimensions
(Noralf)

v3: Fix typo in commit message and remove extraneous line in kerneldoc (Noralf)

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190326132008.11781-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2019-03-26 14:19:48 +01:00
parent 8782c647ae
commit 3df3116ab4
2 changed files with 30 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/gpu/drm/drm_fb_helper.c
View File

@ -2105,6 +2105,32 @@ void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helpe
}
EXPORT_SYMBOL(drm_fb_helper_fill_var);
/**
* drm_fb_helper_fill_info - initializes fbdev information
* @info: fbdev instance to set up
* @fb_helper: fb helper instance to use as template
* @sizes: describes fbdev size and scanout surface size
*
* Sets up the variable and fixed fbdev metainformation from the given fb helper
* instance and the drm framebuffer allocated in &drm_fb_helper.fb.
*
* Drivers should call this (or their equivalent setup code) from their
* &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev
* backing storage framebuffer.
*/
void drm_fb_helper_fill_info(struct fb_info *info,
struct drm_fb_helper *fb_helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_framebuffer *fb = fb_helper->fb;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
drm_fb_helper_fill_var(info, fb_helper,
sizes->fb_width, sizes->fb_height);
}
EXPORT_SYMBOL(drm_fb_helper_fill_info);
static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
uint32_t maxX,
uint32_t maxY)
@ -3165,8 +3191,7 @@ int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper,
#endif
strcpy(fbi->fix.id, "DRM emulated");
drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
drm_fb_helper_fill_var(fbi, fb_helper, sizes->fb_width, sizes->fb_height);
drm_fb_helper_fill_info(fbi, fb_helper, sizes);
if (fb->funcs->dirty) {
struct fb_ops *fbops;

3
include/drm/drm_fb_helper.h
View File

@ -292,6 +292,9 @@ void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helpe
uint32_t fb_width, uint32_t fb_height);
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
uint32_t depth);
void drm_fb_helper_fill_info(struct fb_info *info,
struct drm_fb_helper *fb_helper,
struct drm_fb_helper_surface_size *sizes);
void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);