diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0015-DSS2-DSI-calculate-VP_CLK_RATIO-properly.patch')
| -rw-r--r-- | meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0015-DSS2-DSI-calculate-VP_CLK_RATIO-properly.patch | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0015-DSS2-DSI-calculate-VP_CLK_RATIO-properly.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0015-DSS2-DSI-calculate-VP_CLK_RATIO-properly.patch new file mode 100644 index 0000000000..d6b0cbbb41 --- /dev/null +++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0015-DSS2-DSI-calculate-VP_CLK_RATIO-properly.patch @@ -0,0 +1,68 @@ +From a5c235a6f0094494ae1fc1a1ba4728e0d33dfd3b Mon Sep 17 00:00:00 2001 +From: Tomi Valkeinen <tomi.valkeinen@nokia.com> +Date: Thu, 2 Apr 2009 16:49:27 +0300 +Subject: [PATCH] DSS2: DSI: calculate VP_CLK_RATIO properly + +--- + drivers/video/omap2/dss/dsi.c | 17 +++++++++++------ + 1 files changed, 11 insertions(+), 6 deletions(-) + +diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c +index 4442931..aecb89d 100644 +--- a/drivers/video/omap2/dss/dsi.c ++++ b/drivers/video/omap2/dss/dsi.c +@@ -1104,7 +1104,10 @@ int dsi_pll_init(bool enable_hsclk, bool enable_hsdiv) + enable_clocks(1); + dsi_enable_pll_clock(1); + +- /* configure dispc fck and pixel clock to something sane */ ++ /* XXX this should be calculated depending on the screen size, ++ * required framerate and DSI speed. ++ * For now 48MHz is enough for 864x480@60 with 360Mbps/lane ++ * with two lanes */ + r = dispc_calc_clock_div(1, 48 * 1000 * 1000, &cinfo); + if (r) + goto err0; +@@ -1119,7 +1122,7 @@ int dsi_pll_init(bool enable_hsclk, bool enable_hsdiv) + if (r) + goto err0; + +- /* PLL does not come out of reset without this... */ ++ /* XXX PLL does not come out of reset without this... */ + dispc_pck_free_enable(1); + + if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) { +@@ -1128,8 +1131,8 @@ int dsi_pll_init(bool enable_hsclk, bool enable_hsdiv) + goto err1; + } + +- /* ... but if left on, we get problems when planes do not +- * fill the whole display. No idea about this XXX */ ++ /* XXX ... but if left on, we get problems when planes do not ++ * fill the whole display. No idea about this */ + dispc_pck_free_enable(0); + + if (enable_hsclk && enable_hsdiv) +@@ -2214,6 +2217,7 @@ static int dsi_proto_config(struct omap_display *display) + { + u32 r; + int buswidth = 0; ++ int div; + + dsi_config_tx_fifo(DSI_FIFO_SIZE_128, + DSI_FIFO_SIZE_0, +@@ -2254,8 +2258,9 @@ static int dsi_proto_config(struct omap_display *display) + r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */ + r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */ + r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */ +- /* XXX what should the ratio be */ +- r = FLD_MOD(r, 0, 4, 4); /* VP_CLK_RATIO, VP_PCLK = VP_CLK/2 */ ++ ++ div = dispc_lclk_rate() / dispc_pclk_rate(); ++ r = FLD_MOD(r, div == 2 ? 0 : 1, 4, 4); /* VP_CLK_RATIO */ + r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */ + r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */ + r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */ +-- +1.5.6.5 + |