diff options
Diffstat (limited to 'recipes/linux/linux-omap-pm/dss2/0066-DSS2-DSI-tune-the-timings-to-be-more-relaxed.patch')
| -rw-r--r-- | recipes/linux/linux-omap-pm/dss2/0066-DSS2-DSI-tune-the-timings-to-be-more-relaxed.patch | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-pm/dss2/0066-DSS2-DSI-tune-the-timings-to-be-more-relaxed.patch b/recipes/linux/linux-omap-pm/dss2/0066-DSS2-DSI-tune-the-timings-to-be-more-relaxed.patch new file mode 100644 index 0000000000..a3af90d959 --- /dev/null +++ b/recipes/linux/linux-omap-pm/dss2/0066-DSS2-DSI-tune-the-timings-to-be-more-relaxed.patch @@ -0,0 +1,92 @@ +From 0201b40018d9e264f8c4ea7871223c94e0de61b1 Mon Sep 17 00:00:00 2001 +From: Tomi Valkeinen <tomi.valkeinen@nokia.com> +Date: Thu, 7 May 2009 14:32:55 +0300 +Subject: [PATCH 66/69] DSS2: DSI: tune the timings to be more relaxed + +Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com> +--- + drivers/video/omap2/dss/dsi.c | 37 +++++++++++++++++++++---------------- + 1 files changed, 21 insertions(+), 16 deletions(-) + +diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c +index 5225ed6..67ecfcf 100644 +--- a/drivers/video/omap2/dss/dsi.c ++++ b/drivers/video/omap2/dss/dsi.c +@@ -1396,28 +1396,28 @@ static void dsi_complexio_timings(void) + /* 1 * DDR_CLK = 2 * UI */ + + /* min 40ns + 4*UI max 85ns + 6*UI */ +- ths_prepare = ns2ddr(59) + 2; ++ ths_prepare = ns2ddr(70) + 2; + + /* min 145ns + 10*UI */ +- ths_prepare_ths_zero = ns2ddr(145) + 5; ++ ths_prepare_ths_zero = ns2ddr(175) + 2; + + /* min max(8*UI, 60ns+4*UI) */ +- ths_trail = max((unsigned)4, ns2ddr(60) + 2); ++ ths_trail = ns2ddr(60) + 5; + + /* min 100ns */ +- ths_exit = ns2ddr(100); ++ ths_exit = ns2ddr(145); + + /* tlpx min 50n */ + tlpx_half = ns2ddr(25); + + /* min 60ns */ +- tclk_trail = ns2ddr(60); ++ tclk_trail = ns2ddr(60) + 2; + + /* min 38ns, max 95ns */ +- tclk_prepare = ns2ddr(38); ++ tclk_prepare = ns2ddr(65); + + /* min tclk-prepare + tclk-zero = 300ns */ +- tclk_zero = ns2ddr(300 - 38); ++ tclk_zero = ns2ddr(260); + + DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n", + ths_prepare, ddr2ns(ths_prepare), +@@ -2340,9 +2340,19 @@ static void dsi_proto_timings(struct omap_display *display) + /* min 60ns + 52*UI */ + tclk_post = ns2ddr(60) + 26; + ++ /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */ ++ if (display->hw_config.u.dsi.data1_lane != 0 && ++ display->hw_config.u.dsi.data2_lane != 0) ++ ths_eot = 2; ++ else ++ ths_eot = 4; ++ + ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare, + 4); +- ddr_clk_post = DIV_ROUND_UP(tclk_post + tclk_trail, 4); ++ ddr_clk_post = DIV_ROUND_UP(tclk_post + tclk_trail, 4) + ths_eot; ++ ++ BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255); ++ BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255); + + r = dsi_read_reg(DSI_CLK_TIMING); + r = FLD_MOD(r, ddr_clk_pre, 15, 8); +@@ -2353,14 +2363,9 @@ static void dsi_proto_timings(struct omap_display *display) + ddr_clk_pre, + ddr_clk_post); + +- /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */ +- if (display->hw_config.u.dsi.data1_lane != 0 && +- display->hw_config.u.dsi.data2_lane != 0) +- ths_eot = 2; +- else +- ths_eot = 4; +- +- enter_hs_mode_lat = DIV_ROUND_UP(tlpx + ths_prepare + ths_zero, 4) + 4; ++ enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) + ++ DIV_ROUND_UP(ths_prepare, 4) + ++ DIV_ROUND_UP(ths_zero + 3, 4); + exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot; + + r = FLD_VAL(enter_hs_mode_lat, 31, 16) | +-- +1.6.2.4 + |