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drm/vc4: Move the plane clipping/scaling setup to a separate function. 

As we add actual scaling, this is going to get way more complicated.

Signed-off-by: Eric Anholt <eric@anholt.net>
hifive-unleashed-5.1
Eric Anholt 2015-12-28 14:34:44 -08:00
parent 17eac75111
commit 5c67999420
1 changed files with 52 additions and 26 deletions
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78
drivers/gpu/drm/vc4/vc4_plane.c
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@ -40,6 +40,14 @@ struct vc4_plane_state {
* hardware at vc4_crtc_atomic_flush() time.
*/
u32 __iomem *hw_dlist;
/* Clipped coordinates of the plane on the display. */
int crtc_x, crtc_y, crtc_w, crtc_h;
/* Offset to start scanning out from the start of the plane's
* BO.
*/
u32 offset;
};
static inline struct vc4_plane_state *
@ -151,22 +159,17 @@ static void vc4_dlist_write(struct vc4_plane_state *vc4_state, u32 val)
vc4_state->dlist[vc4_state->dlist_count++] = val;
}
/* Writes out a full display list for an active plane to the plane's
* private dlist state.
*/
static int vc4_plane_mode_set(struct drm_plane *plane,
struct drm_plane_state *state)
static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
struct drm_framebuffer *fb = state->fb;
struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
u32 ctl0_offset = vc4_state->dlist_count;
const struct hvs_format *format = vc4_get_hvs_format(fb->pixel_format);
uint32_t offset = fb->offsets[0];
int crtc_x = state->crtc_x;
int crtc_y = state->crtc_y;
int crtc_w = state->crtc_w;
int crtc_h = state->crtc_h;
vc4_state->offset = fb->offsets[0];
vc4_state->crtc_x = state->crtc_x;
vc4_state->crtc_y = state->crtc_y;
vc4_state->crtc_w = state->crtc_w;
vc4_state->crtc_h = state->crtc_h;
if (state->crtc_w << 16 != state->src_w ||
state->crtc_h << 16 != state->src_h) {
@ -178,18 +181,41 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
return -EINVAL;
}
if (crtc_x < 0) {
offset += drm_format_plane_cpp(fb->pixel_format, 0) * -crtc_x;
crtc_w += crtc_x;
crtc_x = 0;
if (vc4_state->crtc_x < 0) {
vc4_state->offset += (drm_format_plane_cpp(fb->pixel_format,
0) *
-vc4_state->crtc_x);
vc4_state->crtc_w += vc4_state->crtc_x;
vc4_state->crtc_x = 0;
}
if (crtc_y < 0) {
offset += fb->pitches[0] * -crtc_y;
crtc_h += crtc_y;
crtc_y = 0;
if (vc4_state->crtc_y < 0) {
vc4_state->offset += fb->pitches[0] * -vc4_state->crtc_y;
vc4_state->crtc_h += vc4_state->crtc_y;
vc4_state->crtc_y = 0;
}
return 0;
}
/* Writes out a full display list for an active plane to the plane's
* private dlist state.
*/
static int vc4_plane_mode_set(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
struct drm_framebuffer *fb = state->fb;
struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
u32 ctl0_offset = vc4_state->dlist_count;
const struct hvs_format *format = vc4_get_hvs_format(fb->pixel_format);
int ret;
ret = vc4_plane_setup_clipping_and_scaling(state);
if (ret)
return ret;
vc4_dlist_write(vc4_state,
SCALER_CTL0_VALID |
(format->pixel_order << SCALER_CTL0_ORDER_SHIFT) |
@ -199,8 +225,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
/* Position Word 0: Image Positions and Alpha Value */
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(0xff, SCALER_POS0_FIXED_ALPHA) |
VC4_SET_FIELD(crtc_x, SCALER_POS0_START_X) |
VC4_SET_FIELD(crtc_y, SCALER_POS0_START_Y));
VC4_SET_FIELD(vc4_state->crtc_x, SCALER_POS0_START_X) |
VC4_SET_FIELD(vc4_state->crtc_y, SCALER_POS0_START_Y));
/* Position Word 1: Scaled Image Dimensions.
* Skipped due to SCALER_CTL0_UNITY scaling.
@ -212,8 +238,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
SCALER_POS2_ALPHA_MODE_PIPELINE :
SCALER_POS2_ALPHA_MODE_FIXED,
SCALER_POS2_ALPHA_MODE) |
VC4_SET_FIELD(crtc_w, SCALER_POS2_WIDTH) |
VC4_SET_FIELD(crtc_h, SCALER_POS2_HEIGHT));
VC4_SET_FIELD(vc4_state->crtc_w, SCALER_POS2_WIDTH) |
VC4_SET_FIELD(vc4_state->crtc_h, SCALER_POS2_HEIGHT));
/* Position Word 3: Context. Written by the HVS. */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
@ -221,7 +247,7 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
vc4_state->pw0_offset = vc4_state->dlist_count;
/* Pointer Word 0: RGB / Y Pointer */
vc4_dlist_write(vc4_state, bo->paddr + offset);
vc4_dlist_write(vc4_state, bo->paddr + vc4_state->offset);
/* Pointer Context Word 0: Written by the HVS */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);