1 files changed, 78 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0026-DSS2-DSI-sidlemode-to-noidle-while-sending-frame.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0026-DSS2-DSI-sidlemode-to-noidle-while-sending-frame.patch
new file mode 100644
index 0000000000..6ee3908d10
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0026-DSS2-DSI-sidlemode-to-noidle-while-sending-frame.patch
@@ -0,0 +1,78 @@
+From a1e8018c0806a1a0579eda4b93b7d6764a2ff643 Mon Sep 17 00:00:00 2001
+From: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+Date: Wed, 15 Apr 2009 14:06:54 +0300
+Subject: [PATCH] DSS2: DSI: sidlemode to noidle while sending frame
+
+DISPC interrupts are not wake-up capable. Smart-idle in DISPC_SIDLEMODE
+causes DSS interface to go to idle at the end of the frame, and the
+FRAMEDONE interrupt is then delayed until something wakes up the DSS
+interface.
+
+So we set SIDLEMODE to no-idle when we start sending the frame, and
+set it back to smart-idle after receiving FRAMEDONE.
+---
+ drivers/video/omap2/dss/dispc.c |   10 ++++++++++
+ drivers/video/omap2/dss/dsi.c   |    4 ++++
+ drivers/video/omap2/dss/dss.h   |    3 +++
+ 3 files changed, 17 insertions(+), 0 deletions(-)
+
+diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
+index ae7be3d..16c68b8 100644
+--- a/drivers/video/omap2/dss/dispc.c
++++ b/drivers/video/omap2/dss/dispc.c
+@@ -2791,6 +2791,16 @@ static void _omap_dispc_initialize_irq(void)
+        omap_dispc_set_irqs();
+ }
+ 
++void dispc_enable_sidle(void)
++{
++       REG_FLD_MOD(DISPC_SYSCONFIG, 2, 4, 3);  /* SIDLEMODE: smart idle */
++}
++
++void dispc_disable_sidle(void)
++{
++       REG_FLD_MOD(DISPC_SYSCONFIG, 1, 4, 3);  /* SIDLEMODE: no idle */
++}
++
+ static void _omap_dispc_initial_config(void)
+ {
+        u32 l;
+diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
+index 66ac6ea..50af925 100644
+--- a/drivers/video/omap2/dss/dsi.c
++++ b/drivers/video/omap2/dss/dsi.c
+@@ -2665,6 +2665,8 @@ static void dsi_update_screen_dispc(struct omap_display *display,
+                l = FLD_MOD(l, 1, 31, 31); /* TE_START */
+        dsi_write_reg(DSI_VC_TE(1), l);
+ 
++       dispc_disable_sidle();
++
+        dispc_enable_lcd_out(1);
+ 
+        if (dsi.use_te)
+@@ -2678,6 +2680,8 @@ static void framedone_callback(void *data, u32 mask)
+                return;
+        }
+ 
++       dispc_enable_sidle();
++
+        dsi.framedone_scheduled = 1;
+ 
+        /* We get FRAMEDONE when DISPC has finished sending pixels and turns
+diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
+index 0be42b6..d0917a8 100644
+--- a/drivers/video/omap2/dss/dss.h
++++ b/drivers/video/omap2/dss/dss.h
+@@ -244,6 +244,9 @@ void dispc_fake_vsync_irq(void);
+ void dispc_save_context(void);
+ void dispc_restore_context(void);
+ 
++void dispc_enable_sidle(void);
++void dispc_disable_sidle(void);
++
+ void dispc_lcd_enable_signal_polarity(bool act_high);
+ void dispc_lcd_enable_signal(bool enable);
+ void dispc_pck_free_enable(bool enable);
+-- 
+1.5.6.5
+