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drm/komeda: Add komeda_plane/plane_helper_funcs

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Per komeda design KMS-plane maps to komeda layer input pipeline.
komeda_plane_atomic_check is for building a komeda layer input pipeline.

And KMS-plane is only a user of komeda resources. so there is no real HW
update for plane, but all HW update will be handled in crtc->flush.

v2: Rebase

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
This commit is contained in:
james qian wang (Arm Technology China) 2019-01-22 11:06:22 +00:00 committed by Liviu Dudau
parent 11bb22ee77
commit 9e56030941
1 changed files with 129 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

129
drivers/gpu/drm/arm/display/komeda/komeda_plane.c
View file

@ -7,10 +7,86 @@
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_print.h>
#include "komeda_dev.h"
#include "komeda_kms.h"
static int
komeda_plane_init_data_flow(struct drm_plane_state *st,
struct komeda_data_flow_cfg *dflow)
{
struct drm_framebuffer *fb = st->fb;
memset(dflow, 0, sizeof(*dflow));
dflow->blending_zorder = st->zpos;
/* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
dflow->pixel_blend_mode = fb->format->has_alpha ?
st->pixel_blend_mode : DRM_MODE_BLEND_PIXEL_NONE;
dflow->layer_alpha = st->alpha >> 8;
dflow->out_x = st->crtc_x;
dflow->out_y = st->crtc_y;
dflow->out_w = st->crtc_w;
dflow->out_h = st->crtc_h;
dflow->in_x = st->src_x >> 16;
dflow->in_y = st->src_y >> 16;
dflow->in_w = st->src_w >> 16;
dflow->in_h = st->src_h >> 16;
return 0;
}
int komeda_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct komeda_plane *kplane = to_kplane(plane);
struct komeda_plane_state *kplane_st = to_kplane_st(state);
struct komeda_layer *layer = kplane->layer;
struct drm_crtc_state *crtc_st;
struct komeda_crtc *kcrtc;
struct komeda_crtc_state *kcrtc_st;
struct komeda_data_flow_cfg dflow;
int err;
if (!state->crtc || !state->fb)
return 0;
crtc_st = drm_atomic_get_crtc_state(state->state, state->crtc);
if (!crtc_st->enable) {
DRM_DEBUG_ATOMIC("Cannot update plane on a disabled CRTC.\n");
return -EINVAL;
}
/* crtc is inactive, skip the resource assignment */
if (!crtc_st->active)
return 0;
kcrtc = to_kcrtc(state->crtc);
kcrtc_st = to_kcrtc_st(crtc_st);
err = komeda_plane_init_data_flow(state, &dflow);
if (err)
return err;
err = komeda_build_layer_data_flow(layer, kplane_st, kcrtc_st, &dflow);
return err;
}
/* plane doesn't represent a real HW, so there is no HW update for plane.
* komeda handles all the HW update in crtc->atomic_flush
*/
void komeda_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
}
static const struct drm_plane_helper_funcs komeda_plane_helper_funcs = {
.atomic_check = komeda_plane_atomic_check,
.atomic_update = komeda_plane_atomic_update,
};
static void komeda_plane_destroy(struct drm_plane *plane)
@ -20,7 +96,60 @@ static void komeda_plane_destroy(struct drm_plane *plane)
kfree(to_kplane(plane));
}
static void komeda_plane_reset(struct drm_plane *plane)
{
struct komeda_plane_state *state;
struct komeda_plane *kplane = to_kplane(plane);
if (plane->state)
__drm_atomic_helper_plane_destroy_state(plane->state);
kfree(plane->state);
plane->state = NULL;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (state) {
state->base.rotation = DRM_MODE_ROTATE_0;
state->base.pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
state->base.alpha = DRM_BLEND_ALPHA_OPAQUE;
state->base.zpos = kplane->layer->base.id;
plane->state = &state->base;
plane->state->plane = plane;
}
}
static struct drm_plane_state *
komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
{
struct komeda_plane_state *new;
if (WARN_ON(!plane->state))
return NULL;
new = kzalloc(sizeof(*new), GFP_KERNEL);
if (!new)
return NULL;
__drm_atomic_helper_plane_duplicate_state(plane, &new->base);
return &new->base;
}
static void
komeda_plane_atomic_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state)
{
__drm_atomic_helper_plane_destroy_state(state);
kfree(to_kplane_st(state));
}
static const struct drm_plane_funcs komeda_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = komeda_plane_destroy,
.reset = komeda_plane_reset,
.atomic_duplicate_state = komeda_plane_atomic_duplicate_state,
.atomic_destroy_state = komeda_plane_atomic_destroy_state,
};
/* for komeda, which is pipeline can be share between crtcs */