1 files changed, 58 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0016-DSS2-DSI-improve-packet-len-calculation.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0016-DSS2-DSI-improve-packet-len-calculation.patch
new file mode 100644
index 0000000000..bca449f169
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0016-DSS2-DSI-improve-packet-len-calculation.patch
@@ -0,0 +1,58 @@
+From 6b2c9d84c7accdfe1067fcdc8a00e50674aab4bb Mon Sep 17 00:00:00 2001
+From: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+Date: Thu, 2 Apr 2009 17:42:26 +0300
+Subject: [PATCH] DSS2: DSI: improve packet len calculation
+
+---
+ drivers/video/omap2/dss/dsi.c |   21 ++++++++++++++++-----
+ 1 files changed, 16 insertions(+), 5 deletions(-)
+
+diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
+index aecb89d..66ac6ea 100644
+--- a/drivers/video/omap2/dss/dsi.c
++++ b/drivers/video/omap2/dss/dsi.c
+@@ -2624,17 +2624,28 @@ static void dsi_update_screen_dispc(struct omap_display *display,
+                u16 x, u16 y, u16 w, u16 h)
+ {
+        int bytespp = 3;
++       int len;
+        int total_len;
+-       int line_packet_len;
++       int packet_payload;
++       int packet_len;
+        u32 l;
+ 
+        if (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL)
+                DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
+                                x, y, w, h);
+ 
+-       /* TODO: one packet could be longer, I think? Max is the line buffer */
+-       line_packet_len = w * bytespp + 1;      /* 1 byte for DCS cmd */
+-       total_len = line_packet_len * h;
++       len = w * h * bytespp;
++
++       /* XXX: one packet could be longer, I think? Line buffer is
++        * 1024 x 24bits, but we have to put DCS cmd there also.
++        * 1023 * 3 should work, but causes strange color effects. */
++       packet_payload = min(w, (u16)1020) * bytespp;
++
++       packet_len = packet_payload + 1;        /* 1 byte for DCS cmd */
++       total_len = (len / packet_payload) * packet_len;
++
++       if (len % packet_payload)
++               total_len += (len % packet_payload) + 1;
+ 
+        display->ctrl->setup_update(display, x, y, w, h);
+ 
+@@ -2646,7 +2657,7 @@ static void dsi_update_screen_dispc(struct omap_display *display,
+        l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
+        dsi_write_reg(DSI_VC_TE(1), l);
+ 
+-       dsi_vc_write_long_header(1, DSI_DT_DCS_LONG_WRITE, line_packet_len, 0);
++       dsi_vc_write_long_header(1, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
+ 
+        if (dsi.use_te)
+                l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
+-- 
+1.5.6.5
+