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authorTomi Valkeinen <tomi.valkeinen@ti.com>2014-09-30 00:46:17 +0400
committerTomi Valkeinen <tomi.valkeinen@ti.com>2015-02-26 13:15:13 +0300
commit47fc469b3af5fc63d65a51e21acaa3ed06c288e7 (patch)
tree5ff5e3183c19cfdd842cd5dea1d6a21d4f73aba0 /drivers/video
parentd49cd15550d9d4495f6187425318c245d58cb63f (diff)
downloadlinux-47fc469b3af5fc63d65a51e21acaa3ed06c288e7.tar.xz
OMAPDSS: setup default fifo thresholds
At the moment we don't setup FIFO thresholds by default in omapdss. It's supposed to be done by the user of omapdss. And that is missing from omapdrm, causing unoptimal thresholds to be used when using omapdrm. While I believe it's in theory better to allow the user of omapdss to setup the fifo thresholds, in practice we always use the same values, and we could as well setup the thresholds in omapdss. Furthermore, in omapdss init we always swap the FIFO used for GFX and WB overlays, but we don't swap the FIFO thresholds for those overlays (which is the reason for omapdrm using unoptimal HW reset values). So it would make sense to setup the thresholds to account for the swapping of the FIFOs. So, this patch adds code to setup default FIFO tresholds at omapdss init. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/fbdev/omap2/dss/dispc.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/dss/dispc.c b/drivers/video/fbdev/omap2/dss/dispc.c
index 766c985cbfa7..6296a3e5124f 100644
--- a/drivers/video/fbdev/omap2/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/dss/dispc.c
@@ -1138,6 +1138,7 @@ static void dispc_init_fifos(void)
int fifo;
u8 start, end;
u32 unit;
+ int i;
unit = dss_feat_get_buffer_size_unit();
@@ -1177,6 +1178,20 @@ static void dispc_init_fifos(void)
dispc.fifo_assignment[OMAP_DSS_GFX] = OMAP_DSS_WB;
dispc.fifo_assignment[OMAP_DSS_WB] = OMAP_DSS_GFX;
}
+
+ /*
+ * Setup default fifo thresholds.
+ */
+ for (i = 0; i < dss_feat_get_num_ovls(); ++i) {
+ u32 low, high;
+ const bool use_fifomerge = false;
+ const bool manual_update = false;
+
+ dispc_ovl_compute_fifo_thresholds(i, &low, &high,
+ use_fifomerge, manual_update);
+
+ dispc_ovl_set_fifo_threshold(i, low, high);
+ }
}
static u32 dispc_ovl_get_fifo_size(enum omap_plane plane)