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drm: rcar-du: Refactor plane setup 

Rename plane setup functions using more explicit names, and use local
variables to store intermediate values to increase readability. This
also prepares for VSP compositor support.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2015-07-27 13:43:09 +03:00
parent ff967363dd
commit 2f13c5296d
1 changed files with 21 additions and 18 deletions
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39
drivers/gpu/drm/rcar-du/rcar_du_plane.c
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@ -35,7 +35,7 @@ static void rcar_du_plane_write(struct rcar_du_group *rgrp,
data);
}
static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
static void rcar_du_plane_setup_scanout(struct rcar_du_plane *plane)
{
struct rcar_du_plane_state *state =
to_rcar_plane_state(plane->plane.state);
@ -45,8 +45,10 @@ static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
unsigned int src_y = state->state.src_y >> 16;
unsigned int index = state->hwindex;
struct drm_gem_cma_object *gem;
unsigned int pitch;
bool interlaced;
u32 mwr;
unsigned int i;
u32 dma[2];
interlaced = state->state.crtc->state->adjusted_mode.flags
& DRM_MODE_FLAG_INTERLACE;
@ -55,14 +57,18 @@ static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
* operation with 32bpp formats.
*/
if (state->format->planes == 2)
mwr = fb->pitches[0];
pitch = fb->pitches[0];
else
mwr = fb->pitches[0] * 8 / state->format->bpp;
pitch = fb->pitches[0] * 8 / state->format->bpp;
if (interlaced && state->format->bpp == 32)
mwr *= 2;
for (i = 0; i < state->format->planes; ++i) {
gem = drm_fb_cma_get_gem_obj(fb, i);
dma[i] = gem->paddr + fb->offsets[i];
}
rcar_du_plane_write(rgrp, index, PnMWR, mwr);
rcar_du_plane_write(rgrp, index, PnMWR,
(interlaced && state->format->bpp == 32) ?
pitch * 2 : pitch);
/* The Y position is expressed in raster line units and must be doubled
* for 32bpp formats, according to the R8A7790 datasheet. No mention of
@ -80,21 +86,18 @@ static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
(!interlaced && state->format->bpp == 32 ? 2 : 1));
gem = drm_fb_cma_get_gem_obj(fb, 0);
rcar_du_plane_write(rgrp, index, PnDSA0R, gem->paddr + fb->offsets[0]);
rcar_du_plane_write(rgrp, index, PnDSA0R, dma[0]);
if (state->format->planes == 2) {
index = (index + 1) % 8;
rcar_du_plane_write(rgrp, index, PnMWR, fb->pitches[0]);
rcar_du_plane_write(rgrp, index, PnMWR, pitch);
rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
(state->format->bpp == 16 ? 2 : 1) / 2);
gem = drm_fb_cma_get_gem_obj(fb, 1);
rcar_du_plane_write(rgrp, index, PnDSA0R,
gem->paddr + fb->offsets[1]);
rcar_du_plane_write(rgrp, index, PnDSA0R, dma[1]);
}
}
@ -161,8 +164,8 @@ static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
}
}
static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
unsigned int index)
static void rcar_du_plane_setup_format(struct rcar_du_plane *plane,
unsigned int index)
{
struct rcar_du_plane_state *state =
to_rcar_plane_state(plane->plane.state);
@ -217,11 +220,11 @@ void rcar_du_plane_setup(struct rcar_du_plane *plane)
struct rcar_du_plane_state *state =
to_rcar_plane_state(plane->plane.state);
__rcar_du_plane_setup(plane, state->hwindex);
rcar_du_plane_setup_format(plane, state->hwindex);
if (state->format->planes == 2)
__rcar_du_plane_setup(plane, (state->hwindex + 1) % 8);
rcar_du_plane_setup_format(plane, (state->hwindex + 1) % 8);
rcar_du_plane_setup_fb(plane);
rcar_du_plane_setup_scanout(plane);
}
static int rcar_du_plane_atomic_check(struct drm_plane *plane,