mirror of https://gitee.com/openkylin/linux.git
drm/plane-helper: Add drm_plane_helper_check_update() (v3)
Pull the parameter checking from drm_primary_helper_update() out into its own function; drivers that provide their own setplane() implementations rather than using the helper may still want to share this parameter checking logic. A few of the checks here were also updated based on suggestions by Ville Syrjälä. v3: - s/primary_helper/plane_helper/ --- this checking logic may be useful for other types of planes as well. - Fix visibility check (need to dereference visibility pointer) v2: - Pass src/dest/clip rects and min/max scaling down to helper to avoid duplication of effort between helper and drivers (suggested by Ville). - Allow caller to specify whether the primary plane should be updatable while the crtc is disabled. Cc: dri-devel@lists.freedesktop.org Reviewed-by: Chon Ming Lee <chon.ming.lee@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Acked-by: Dave Airlie <airlied@gmail.com> [danvet: Include header properly and fixup declaration mismatch to make this compile.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Matt Roper
Daniel Vetter
parent
7f994f3fc4
commit
7daf8d54c1
|
|
@ -25,6 +25,7 @@
|
|||
|
||||
#include <linux/list.h>
|
||||
#include <drm/drmP.h>
|
||||
#include <drm/drm_plane_helper.h>
|
||||
#include <drm/drm_rect.h>
|
||||
#include <drm/drm_plane_helper.h>
|
||||
|
||||
|
|
@ -73,6 +74,79 @@ static int get_connectors_for_crtc(struct drm_crtc *crtc,
|
|||
return count;
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_plane_helper_check_update() - Check plane update for validity
|
||||
* @plane: plane object to update
|
||||
* @crtc: owning CRTC of owning plane
|
||||
* @fb: framebuffer to flip onto plane
|
||||
* @src: source coordinates in 16.16 fixed point
|
||||
* @dest: integer destination coordinates
|
||||
* @clip: integer clipping coordinates
|
||||
* @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point
|
||||
* @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point
|
||||
* @can_position: is it legal to position the plane such that it
|
||||
* doesn't cover the entire crtc? This will generally
|
||||
* only be false for primary planes.
|
||||
* @can_update_disabled: can the plane be updated while the crtc
|
||||
* is disabled?
|
||||
* @visible: output parameter indicating whether plane is still visible after
|
||||
* clipping
|
||||
*
|
||||
* Checks that a desired plane update is valid. Drivers that provide
|
||||
* their own plane handling rather than helper-provided implementations may
|
||||
* still wish to call this function to avoid duplication of error checking
|
||||
* code.
|
||||
*
|
||||
* RETURNS:
|
||||
* Zero if update appears valid, error code on failure
|
||||
*/
|
||||
int drm_plane_helper_check_update(struct drm_plane *plane,
|
||||
struct drm_crtc *crtc,
|
||||
struct drm_framebuffer *fb,
|
||||
struct drm_rect *src,
|
||||
struct drm_rect *dest,
|
||||
const struct drm_rect *clip,
|
||||
int min_scale,
|
||||
int max_scale,
|
||||
bool can_position,
|
||||
bool can_update_disabled,
|
||||
bool *visible)
|
||||
{
|
||||
int hscale, vscale;
|
||||
|
||||
if (!crtc->enabled && !can_update_disabled) {
|
||||
DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Check scaling */
|
||||
hscale = drm_rect_calc_hscale(src, dest, min_scale, max_scale);
|
||||
vscale = drm_rect_calc_vscale(src, dest, min_scale, max_scale);
|
||||
if (hscale < 0 || vscale < 0) {
|
||||
DRM_DEBUG_KMS("Invalid scaling of plane\n");
|
||||
return -ERANGE;
|
||||
}
|
||||
|
||||
*visible = drm_rect_clip_scaled(src, dest, clip, hscale, vscale);
|
||||
if (!*visible)
|
||||
/*
|
||||
* Plane isn't visible; some drivers can handle this
|
||||
* so we just return success here. Drivers that can't
|
||||
* (including those that use the primary plane helper's
|
||||
* update function) will return an error from their
|
||||
* update_plane handler.
|
||||
*/
|
||||
return 0;
|
||||
|
||||
if (!can_position && !drm_rect_equals(dest, clip)) {
|
||||
DRM_DEBUG_KMS("Plane must cover entire CRTC\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_plane_helper_check_update);
|
||||
|
||||
/**
|
||||
* drm_primary_helper_update() - Helper for primary plane update
|
||||
* @plane: plane object to update
|
||||
|
|
@ -121,51 +195,42 @@ int drm_primary_helper_update(struct drm_plane *plane, struct drm_crtc *crtc,
|
|||
.x = src_x >> 16,
|
||||
.y = src_y >> 16,
|
||||
};
|
||||
struct drm_rect src = {
|
||||
.x1 = src_x,
|
||||
.y1 = src_y,
|
||||
.x2 = src_x + src_w,
|
||||
.y2 = src_y + src_h,
|
||||
};
|
||||
struct drm_rect dest = {
|
||||
.x1 = crtc_x,
|
||||
.y1 = crtc_y,
|
||||
.x2 = crtc_x + crtc_w,
|
||||
.y2 = crtc_y + crtc_h,
|
||||
};
|
||||
struct drm_rect clip = {
|
||||
const struct drm_rect clip = {
|
||||
.x2 = crtc->mode.hdisplay,
|
||||
.y2 = crtc->mode.vdisplay,
|
||||
};
|
||||
struct drm_connector **connector_list;
|
||||
int num_connectors, ret;
|
||||
bool visible;
|
||||
|
||||
if (!crtc->enabled) {
|
||||
DRM_DEBUG_KMS("Cannot update primary plane of a disabled CRTC.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Disallow subpixel positioning */
|
||||
if ((src_x | src_y | src_w | src_h) & SUBPIXEL_MASK) {
|
||||
DRM_DEBUG_KMS("Primary plane does not support subpixel positioning\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Disallow scaling */
|
||||
src_w >>= 16;
|
||||
src_h >>= 16;
|
||||
if (crtc_w != src_w || crtc_h != src_h) {
|
||||
DRM_DEBUG_KMS("Can't scale primary plane\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Make sure primary plane covers entire CRTC */
|
||||
drm_rect_intersect(&dest, &clip);
|
||||
if (dest.x1 != 0 || dest.y1 != 0 ||
|
||||
dest.x2 != crtc->mode.hdisplay || dest.y2 != crtc->mode.vdisplay) {
|
||||
DRM_DEBUG_KMS("Primary plane must cover entire CRTC\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Framebuffer must be big enough to cover entire plane */
|
||||
ret = drm_crtc_check_viewport(crtc, crtc_x, crtc_y, &crtc->mode, fb);
|
||||
ret = drm_plane_helper_check_update(plane, crtc, fb,
|
||||
&src, &dest, &clip,
|
||||
DRM_PLANE_HELPER_NO_SCALING,
|
||||
DRM_PLANE_HELPER_NO_SCALING,
|
||||
false, false, &visible);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (!visible)
|
||||
/*
|
||||
* Primary plane isn't visible. Note that unless a driver
|
||||
* provides their own disable function, this will just
|
||||
* wind up returning -EINVAL to userspace.
|
||||
*/
|
||||
return plane->funcs->disable_plane(plane);
|
||||
|
||||
/* Find current connectors for CRTC */
|
||||
num_connectors = get_connectors_for_crtc(crtc, NULL, 0);
|
||||
BUG_ON(num_connectors == 0);
|
||||
|
|
|
|||
|
|
@ -24,6 +24,17 @@
|
|||
#ifndef DRM_PLANE_HELPER_H
|
||||
#define DRM_PLANE_HELPER_H
|
||||
|
||||
#include <drm/drm_rect.h>
|
||||
|
||||
/*
|
||||
* Drivers that don't allow primary plane scaling may pass this macro in place
|
||||
* of the min/max scale parameters of the update checker function.
|
||||
*
|
||||
* Due to src being in 16.16 fixed point and dest being in integer pixels,
|
||||
* 1<<16 represents no scaling.
|
||||
*/
|
||||
#define DRM_PLANE_HELPER_NO_SCALING (1<<16)
|
||||
|
||||
/**
|
||||
* DOC: plane helpers
|
||||
*
|
||||
|
|
@ -31,6 +42,17 @@
|
|||
* planes.
|
||||
*/
|
||||
|
||||
extern int drm_plane_helper_check_update(struct drm_plane *plane,
|
||||
struct drm_crtc *crtc,
|
||||
struct drm_framebuffer *fb,
|
||||
struct drm_rect *src,
|
||||
struct drm_rect *dest,
|
||||
const struct drm_rect *clip,
|
||||
int min_scale,
|
||||
int max_scale,
|
||||
bool can_position,
|
||||
bool can_update_disabled,
|
||||
bool *visible);
|
||||
extern int drm_primary_helper_update(struct drm_plane *plane,
|
||||
struct drm_crtc *crtc,
|
||||
struct drm_framebuffer *fb,
|
||||
|
|
|
|||
Loading…
Reference in New Issue