From 6b2c9d84c7accdfe1067fcdc8a00e50674aab4bb Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen 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