diff options
| author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-03-15 18:01:08 +0100 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-04-14 09:17:28 +0200 |
| commit | ebab87ab7a130c2930b85695e01fc2944fab85c5 (patch) | |
| tree | c3a44394ac1baca22b0cbd33234e96f1ba5260c6 | |
| parent | 5ac44c8b061653119456921e2e4aa78668b9f3d9 (diff) | |
| download | talos-obmc-linux-ebab87ab7a130c2930b85695e01fc2944fab85c5.tar.gz talos-obmc-linux-ebab87ab7a130c2930b85695e01fc2944fab85c5.zip | |
drm: atmel-hlcdc: route DMA accesses through AHB interfaces
In relation with the actuall bandwidth consumed on a DMA Source interface,
choose the less used one for a created plane.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
| -rw-r--r-- | drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 43 |
3 files changed, 47 insertions, 3 deletions
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c index bd35a8ac1a49..8df0aaf98725 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c @@ -319,7 +319,11 @@ static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c, if (ret) return ret; - return atmel_hlcdc_plane_prepare_disc_area(s); + ret = atmel_hlcdc_plane_prepare_disc_area(s); + if (ret) + return ret; + + return atmel_hlcdc_plane_prepare_ahb_routing(s); } static void atmel_hlcdc_crtc_atomic_begin(struct drm_crtc *c, diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h index 93d0281196e5..7a47f8c094d0 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h @@ -163,6 +163,7 @@ struct atmel_hlcdc_planes * atmel_hlcdc_create_planes(struct drm_device *dev); int atmel_hlcdc_plane_prepare_disc_area(struct drm_crtc_state *c_state); +int atmel_hlcdc_plane_prepare_ahb_routing(struct drm_crtc_state *c_state); void atmel_hlcdc_crtc_irq(struct drm_crtc *c); diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c index 2158d7a61c5e..aef3ca8a81fa 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c @@ -59,6 +59,8 @@ struct atmel_hlcdc_plane_state { int disc_w; int disc_h; + int ahb_id; + /* These fields are private and should not be touched */ int bpp[ATMEL_HLCDC_MAX_PLANES]; unsigned int offsets[ATMEL_HLCDC_MAX_PLANES]; @@ -361,8 +363,10 @@ atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane, atmel_hlcdc_layer_update_cfg(&plane->layer, ATMEL_HLCDC_LAYER_DMA_CFG_ID, - ATMEL_HLCDC_LAYER_DMA_BLEN_MASK, - ATMEL_HLCDC_LAYER_DMA_BLEN_INCR16); + ATMEL_HLCDC_LAYER_DMA_BLEN_MASK | + ATMEL_HLCDC_LAYER_DMA_SIF, + ATMEL_HLCDC_LAYER_DMA_BLEN_INCR16 | + state->ahb_id); atmel_hlcdc_layer_update_cfg(&plane->layer, layout->general_config, ATMEL_HLCDC_LAYER_ITER2BL | @@ -437,6 +441,41 @@ static void atmel_hlcdc_plane_update_buffers(struct atmel_hlcdc_plane *plane, } } +int atmel_hlcdc_plane_prepare_ahb_routing(struct drm_crtc_state *c_state) +{ + unsigned int ahb_load[2] = { }; + struct drm_plane *plane; + + drm_atomic_crtc_state_for_each_plane(plane, c_state) { + struct atmel_hlcdc_plane_state *plane_state; + struct drm_plane_state *plane_s; + unsigned int pixels, load = 0; + int i; + + plane_s = drm_atomic_get_plane_state(c_state->state, plane); + if (IS_ERR(plane_s)) + return PTR_ERR(plane_s); + + plane_state = + drm_plane_state_to_atmel_hlcdc_plane_state(plane_s); + + pixels = (plane_state->src_w * plane_state->src_h) - + (plane_state->disc_w * plane_state->disc_h); + + for (i = 0; i < plane_state->nplanes; i++) + load += pixels * plane_state->bpp[i]; + + if (ahb_load[0] <= ahb_load[1]) + plane_state->ahb_id = 0; + else + plane_state->ahb_id = 1; + + ahb_load[plane_state->ahb_id] += load; + } + + return 0; +} + int atmel_hlcdc_plane_prepare_disc_area(struct drm_crtc_state *c_state) { |
