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| author | Archit Taneja <archit@ti.com> | 2013-03-26 19:15:25 +0530 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2013-04-10 15:02:53 +0300 |
| commit | d0df9a2c8f856b290407dec1069eb320b4bbb705 (patch) | |
| tree | 9688f820a5cc9775e491710d1869ae00a75ec0ec /drivers/video/omap2/dss/dispc.c | |
| parent | c35eeb2e80a4dd3aa1a4ceac8f74f4c4e61f6463 (diff) | |
| download | op-kernel-dev-d0df9a2c8f856b290407dec1069eb320b4bbb705.zip op-kernel-dev-d0df9a2c8f856b290407dec1069eb320b4bbb705.tar.gz | |
OMAPDSS: DISPC: Revert to older DISPC Smart Standby mechanism for OMAP5
DISPC on OMAP5 has a more optimised mechanism of asserting Mstandby to achieve
more power savings when DISPC is configured in Smart Standby mode. This
mechanism leads to underflows when multiple DISPC pipes are enabled.
There is a register field which can let us revert to the older mechanism of
asserting Mstandby. Configure this field to prevent underflows.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2/dss/dispc.c')
| -rw-r--r-- | drivers/video/omap2/dss/dispc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c index e7ed1f7..ea9a848 100644 --- a/drivers/video/omap2/dss/dispc.c +++ b/drivers/video/omap2/dss/dispc.c @@ -87,6 +87,9 @@ struct dispc_features { /* no DISPC_IRQ_FRAMEDONETV on this SoC */ bool no_framedone_tv:1; + + /* revert to the OMAP4 mechanism of DISPC Smart Standby operation */ + bool mstandby_workaround:1; }; #define DISPC_MAX_NR_FIFOS 5 @@ -3490,6 +3493,9 @@ static void _omap_dispc_initial_config(void) dispc_configure_burst_sizes(); dispc_ovl_enable_zorder_planes(); + + if (dispc.feat->mstandby_workaround) + REG_FLD_MOD(DISPC_MSTANDBY_CTRL, 1, 0, 0); } static const struct dispc_features omap24xx_dispc_feats __initconst = { @@ -3584,6 +3590,7 @@ static const struct dispc_features omap54xx_dispc_feats __initconst = { .calc_core_clk = calc_core_clk_44xx, .num_fifos = 5, .gfx_fifo_workaround = true, + .mstandby_workaround = true, }; static int __init dispc_init_features(struct platform_device *pdev) |
