diff options
| -rw-r--r-- | drivers/video/omap2/displays/panel-taal.c | 6 | ||||
| -rw-r--r-- | drivers/video/omap2/dss/dsi.c | 126 | ||||
| -rw-r--r-- | include/video/omapdss.h | 2 |
3 files changed, 134 insertions, 0 deletions
diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c index 77aed0e51f9b..ddda96a52d06 100644 --- a/drivers/video/omap2/displays/panel-taal.c +++ b/drivers/video/omap2/displays/panel-taal.c @@ -1065,6 +1065,12 @@ static int taal_power_on(struct omap_dss_device *dssdev) omapdss_dsi_set_pixel_format(dssdev, OMAP_DSS_DSI_FMT_RGB888); omapdss_dsi_set_operation_mode(dssdev, OMAP_DSS_DSI_CMD_MODE); + r = omapdss_dsi_set_clocks(dssdev, 216000000, 10000000); + if (r) { + dev_err(&dssdev->dev, "failed to set HS and LP clocks\n"); + goto err0; + } + r = omapdss_dsi_display_enable(dssdev); if (r) { dev_err(&dssdev->dev, "failed to enable DSI\n"); diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index 96d0024ada40..340c832d21d8 100644 --- a/drivers/video/omap2/dss/dsi.c +++ b/drivers/video/omap2/dss/dsi.c @@ -1454,6 +1454,68 @@ found: return 0; } +static int dsi_pll_calc_ddrfreq(struct platform_device *dsidev, + unsigned long req_clk, struct dsi_clock_info *cinfo) +{ + struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); + struct dsi_clock_info cur, best; + unsigned long dss_sys_clk, max_dss_fck, max_dsi_fck; + unsigned long req_clkin4ddr; + + DSSDBG("dsi_pll_calc_ddrfreq\n"); + + dss_sys_clk = clk_get_rate(dsi->sys_clk); + + max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); + max_dsi_fck = dss_feat_get_param_max(FEAT_PARAM_DSI_FCK); + + memset(&best, 0, sizeof(best)); + memset(&cur, 0, sizeof(cur)); + + cur.clkin = dss_sys_clk; + + req_clkin4ddr = req_clk * 4; + + for (cur.regn = 1; cur.regn < dsi->regn_max; ++cur.regn) { + cur.fint = cur.clkin / cur.regn; + + if (cur.fint > dsi->fint_max || cur.fint < dsi->fint_min) + continue; + + /* DSIPHY(MHz) = (2 * regm / regn) * clkin */ + for (cur.regm = 1; cur.regm < dsi->regm_max; ++cur.regm) { + unsigned long a, b; + + a = 2 * cur.regm * (cur.clkin/1000); + b = cur.regn; + cur.clkin4ddr = a / b * 1000; + + if (cur.clkin4ddr > 1800 * 1000 * 1000) + break; + + if (abs(cur.clkin4ddr - req_clkin4ddr) < + abs(best.clkin4ddr - req_clkin4ddr)) { + best = cur; + DSSDBG("best %ld\n", best.clkin4ddr); + } + + if (cur.clkin4ddr == req_clkin4ddr) + goto found; + } + } +found: + best.regm_dispc = DIV_ROUND_UP(best.clkin4ddr, max_dss_fck); + best.dsi_pll_hsdiv_dispc_clk = best.clkin4ddr / best.regm_dispc; + + best.regm_dsi = DIV_ROUND_UP(best.clkin4ddr, max_dsi_fck); + best.dsi_pll_hsdiv_dsi_clk = best.clkin4ddr / best.regm_dsi; + + if (cinfo) + *cinfo = best; + + return 0; +} + int dsi_pll_set_clock_div(struct platform_device *dsidev, struct dsi_clock_info *cinfo) { @@ -4110,6 +4172,70 @@ int omapdss_dsi_configure_pins(struct omap_dss_device *dssdev, } EXPORT_SYMBOL(omapdss_dsi_configure_pins); +int omapdss_dsi_set_clocks(struct omap_dss_device *dssdev, + unsigned long ddr_clk, unsigned long lp_clk) +{ + struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); + struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); + struct dsi_clock_info cinfo; + struct dispc_clock_info dispc_cinfo; + unsigned lp_clk_div; + unsigned long dsi_fclk; + int bpp = dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt); + unsigned long pck; + int r; + + DSSDBGF("ddr_clk %lu, lp_clk %lu", ddr_clk, lp_clk); + + mutex_lock(&dsi->lock); + + r = dsi_pll_calc_ddrfreq(dsidev, ddr_clk, &cinfo); + if (r) + goto err; + + dssdev->clocks.dsi.regn = cinfo.regn; + dssdev->clocks.dsi.regm = cinfo.regm; + dssdev->clocks.dsi.regm_dispc = cinfo.regm_dispc; + dssdev->clocks.dsi.regm_dsi = cinfo.regm_dsi; + + + dsi_fclk = cinfo.dsi_pll_hsdiv_dsi_clk; + lp_clk_div = DIV_ROUND_UP(dsi_fclk, lp_clk * 2); + + dssdev->clocks.dsi.lp_clk_div = lp_clk_div; + + /* pck = TxByteClkHS * datalanes * 8 / bitsperpixel */ + + pck = cinfo.clkin4ddr / 16 * (dsi->num_lanes_used - 1) * 8 / bpp; + + DSSDBG("finding dispc dividers for pck %lu\n", pck); + + dispc_find_clk_divs(pck, cinfo.dsi_pll_hsdiv_dispc_clk, &dispc_cinfo); + + dssdev->clocks.dispc.channel.lck_div = dispc_cinfo.lck_div; + dssdev->clocks.dispc.channel.pck_div = dispc_cinfo.pck_div; + + + dssdev->clocks.dispc.dispc_fclk_src = OMAP_DSS_CLK_SRC_FCK; + + dssdev->clocks.dispc.channel.lcd_clk_src = + dsi->module_id == 0 ? + OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC : + OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC; + + dssdev->clocks.dsi.dsi_fclk_src = + dsi->module_id == 0 ? + OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI : + OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI; + + mutex_unlock(&dsi->lock); + return 0; +err: + mutex_unlock(&dsi->lock); + return r; +} +EXPORT_SYMBOL(omapdss_dsi_set_clocks); + int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) { struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); diff --git a/include/video/omapdss.h b/include/video/omapdss.h index a5572d5ee8d1..24a7fa196651 100644 --- a/include/video/omapdss.h +++ b/include/video/omapdss.h @@ -738,6 +738,8 @@ int omap_dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id); void omap_dsi_release_vc(struct omap_dss_device *dssdev, int channel); int omapdss_dsi_configure_pins(struct omap_dss_device *dssdev, const struct omap_dsi_pin_config *pin_cfg); +int omapdss_dsi_set_clocks(struct omap_dss_device *dssdev, + unsigned long ddr_clk, unsigned long lp_clk); int omapdss_dsi_display_enable(struct omap_dss_device *dssdev); void omapdss_dsi_display_disable(struct omap_dss_device *dssdev, |