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OMAPDSS: DISPC: Configure writeback specific parameters in dispc_wb_setup()

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Configure some of the writeback specific parameters in dispc_wb_setup(). The
writeback parameters configured are:

truncation: This needs to be set if the color depth input to writeback is more
than the color depth of the color mode we want to store in memory.

writeback mode: This configures whether we want to use writeback in mem to mem
or capture mode. This information will be directly passed by APPLY later.

Signed-off-by: Archit Taneja <archit@ti.com>
This commit is contained in:
Archit Taneja 2012-08-24 16:59:26 +05:30 committed by Tomi Valkeinen
parent 749feffa6b
commit 9e4a0fc765
2 changed files with 27 additions and 3 deletions
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28
drivers/video/omap2/dss/dispc.c
View File

@ -2482,13 +2482,15 @@ int dispc_ovl_setup(enum omap_plane plane, const struct omap_overlay_info *oi,
}
int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
const struct omap_video_timings *mgr_timings)
bool mem_to_mem, const struct omap_video_timings *mgr_timings)
{
int r;
u32 l;
enum omap_plane plane = OMAP_DSS_WB;
const int pos_x = 0, pos_y = 0;
const u8 zorder = 0, global_alpha = 0;
const bool replication = false;
bool truncation;
int in_width = mgr_timings->x_res;
int in_height = mgr_timings->y_res;
enum omap_overlay_caps caps =
@ -2503,7 +2505,29 @@ int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
wi->buf_width, pos_x, pos_y, in_width, in_height, wi->width,
wi->height, wi->color_mode, wi->rotation, wi->mirror, zorder,
wi->pre_mult_alpha, global_alpha, wi->rotation_type,
replication, mgr_timings, false);
replication, mgr_timings, mem_to_mem);
switch (wi->color_mode) {
case OMAP_DSS_COLOR_RGB16:
case OMAP_DSS_COLOR_RGB24P:
case OMAP_DSS_COLOR_ARGB16:
case OMAP_DSS_COLOR_RGBA16:
case OMAP_DSS_COLOR_RGB12U:
case OMAP_DSS_COLOR_ARGB16_1555:
case OMAP_DSS_COLOR_XRGB16_1555:
case OMAP_DSS_COLOR_RGBX16:
truncation = true;
break;
default:
truncation = false;
break;
}
/* setup extra DISPC_WB_ATTRIBUTES */
l = dispc_read_reg(DISPC_OVL_ATTRIBUTES(plane));
l = FLD_MOD(l, truncation, 10, 10); /* TRUNCATIONENABLE */
l = FLD_MOD(l, mem_to_mem, 19, 19); /* WRITEBACKMODE */
dispc_write_reg(DISPC_OVL_ATTRIBUTES(plane), l);
return r;
}

2
drivers/video/omap2/dss/dss.h
View File

@ -488,7 +488,7 @@ void dispc_mgr_setup(enum omap_channel channel,
void dispc_wb_set_channel_in(enum dss_writeback_channel channel);
int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
const struct omap_video_timings *timings);
bool mem_to_mem, const struct omap_video_timings *timings);
/* VENC */
#ifdef CONFIG_OMAP2_DSS_VENC