From: Mythri P K <mythr...@ti.com> This is an RFC patch to add support for HDMI DSS driver in OMAP.
Signed-off-by: Mythri P K <mythr...@ti.com> --- drivers/video/omap2/dss/hdmi.c | 292 ++++++++++++++++++++++++++++++++++++++++ 1 files changed, 292 insertions(+), 0 deletions(-) create mode 100644 drivers/video/omap2/dss/hdmi.c diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c new file mode 100644 index 0000000..3d7acd2 --- /dev/null +++ b/drivers/video/omap2/dss/hdmi.c @@ -0,0 +1,292 @@ +/* + * linux/drivers/video/omap2/dss/hdmi.c + * + * Copyright (C) 2009 Texas Instruments + * Author: Yong Zhi + * + * HDMI settings from TI's DSS driver + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + * History: + * Mythripk <mythr...@ti.com> -Redesigned on the driver to adhere to DSS2 model. + * -GPIO calls for HDMI. + * + * + */ + +#define DSS_SUBSYS_NAME "HDMI" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <plat/display.h> +#include <plat/cpu.h> +#include <plat/gpio.h> + +#include "dss.h" + +static struct { + struct mutex lock; +} hdmi; + +#define FLD_GET(val, start, end) (((val) & FLD_MASK(start, end)) >> (end)) +#define FLD_MOD(orig, val, start, end) \ + (((orig) & ~FLD_MASK(start, end)) | FLD_VAL(val, start, end)) + + +#define CPF 2 + +int hdmi_init_display(struct omap_dss_device *dssdev) +{ + DSSDBG("init_display\n"); + + return 0; +} + +void compute_hdmi_pll(int clkin, int phy, + int n, struct hdmi_pll_info *pi) +{ + int refclk; + u32 temp, mf; + + if (clkin > 3200) /* 32 mHz */ + refclk = clkin / (2 * (n + 1)); + else + refclk = clkin / (n + 1); + + temp = phy * 100/(CPF * refclk); + + pi->regn = n; + pi->regm = temp/100; + pi->regm2 = 1; + + mf = (phy - pi->regm * CPF * refclk) * 262144; + pi->regmf = mf/(CPF * refclk); + + if (phy > 1000 * 100) { + pi->regm4 = phy / 10000; + pi->dcofreq = 1; + pi->regsd = ((pi->regm * 384)/((n + 1) * 250) + 5)/10; + } else { + pi->regm4 = 1; + pi->dcofreq = 0; + pi->regsd = 0; + } + + DSSDBG("M = %d Mf = %d, m4= %d\n", pi->regm, pi->regmf, pi->regm4); + DSSDBG("range = %d sd = %d\n", pi->dcofreq, pi->regsd); +} + + +static void hdmi_enable_clocks(int enable) +{ + if (enable) + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1 | DSS_CLK_54M | + DSS_CLK_96M); + else + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1 | DSS_CLK_54M | + DSS_CLK_96M); +} + +static irqreturn_t hdmi_irq_handler(int irq, void *arg) +{ + DSSDBG("Will be used in future to handle HPD"); + return IRQ_HANDLED; +} + +int hdmi_init(struct platform_device *pdev, int code, int mode) +{ + int r = 0; + DSSDBG("Enter hdmi_init()\n"); + + mutex_init(&hdmi.lock); + + r = request_irq(OMAP44XX_IRQ_DSS_HDMI, hdmi_irq_handler, + 0, "OMAP HDMI", (void *)0); + + return 0; + +} + +void hdmi_exit(void) +{ + free_irq(OMAP44XX_IRQ_DSS_HDMI, NULL); + +} + +static int hdmi_power_on(struct omap_dss_device *dssdev) +{ + hdmi_enable_clocks(1); + + dispc_enable_digit_out(0); + + printk("poweron returns"); + + return 0; +} + +int hdmi_dispc_setting(struct omap_dss_device *dssdev) +{ + + + /* these settings are independent of overlays */ + dss_switch_tv_hdmi(1); + + /* bypass TV gamma table*/ + dispc_enable_gamma_table(0); + + /* tv size */ + dispc_set_digit_size(dssdev->panel.timings.x_res, + dssdev->panel.timings.y_res); + + + dispc_enable_digit_out(1); + + return 0; +} + +static void hdmi_power_off(struct omap_dss_device *dssdev) +{ + + dispc_enable_digit_out(0); + + if (dssdev->platform_disable) + dssdev->platform_disable(dssdev); + + + hdmi_enable_clocks(0); + +} + +int hdmi_enable_display(struct omap_dss_device *dssdev) +{ + int r = 0; + DSSDBG("ENTER hdmi_enable_display()\n"); + + mutex_lock(&hdmi.lock); + + r = omap_dss_start_device(dssdev); + if (r) { + DSSDBG("failed to start device\n"); + return r; + } + + free_irq(OMAP44XX_IRQ_DSS_HDMI, NULL); + + /* PAD0_HDMI_HPD_PAD1_HDMI_CEC */ + omap_writel(0x01180118, 0x4A100098); + /* PAD0_HDMI_DDC_SCL_PAD1_HDMI_DDC_SDA */ + omap_writel(0x01180118 , 0x4A10009C); + /* CONTROL_HDMI_TX_PHY */ + omap_writel(0x10000000, 0x4A100610); + + if (dssdev->platform_enable) + dssdev->platform_enable(dssdev); + + r = hdmi_power_on(dssdev); + if (r) { + DSSERR("failed to power on device\n"); + goto err; + } + r = request_irq(OMAP44XX_IRQ_DSS_HDMI, hdmi_irq_handler, + 0, "OMAP HDMI", (void *)0); + + +err: + mutex_unlock(&hdmi.lock); + printk("enable display returns"); + return r; + +} + +void hdmi_disable_display(struct omap_dss_device *dssdev) +{ + DSSDBG("Enter hdmi_disable_display()\n"); + + mutex_lock(&hdmi.lock); + + omap_dss_stop_device(dssdev); + + hdmi_power_off(dssdev); + +end: + mutex_unlock(&hdmi.lock); +} + +int hdmi_display_suspend(struct omap_dss_device *dssdev) +{ + int r = 0; + + DSSDBG("hdmi_display_suspend\n"); + mutex_lock(&hdmi.lock); + + omap_dss_stop_device(dssdev); + + hdmi_power_off(dssdev); +end: + mutex_unlock(&hdmi.lock); + return r; +} + +int hdmi_display_resume(struct omap_dss_device *dssdev) +{ + int r = 0; + + DSSDBG("hdmi_display_resume\n"); + mutex_lock(&hdmi.lock); + + /* the tv overlay manager is shared*/ + r = omap_dss_start_device(dssdev); + if (r) { + DSSERR("failed to start device\n"); + goto err; + } + + /* PAD0_HDMI_HPD_PAD1_HDMI_CEC */ + omap_writel(0x01180118, 0x4A100098); + /* PAD0_HDMI_DDC_SCL_PAD1_HDMI_DDC_SDA */ + omap_writel(0x01180118 , 0x4A10009C); + /* CONTROL_HDMI_TX_PHY */ + omap_writel(0x10000000, 0x4A100610); + + if (dssdev->platform_enable) + dssdev->platform_enable(dssdev); + + r = hdmi_power_on(dssdev); + if (r) { + DSSERR("failed to power on device\n"); + goto err; + } + +err: + mutex_unlock(&hdmi.lock); + + return r; +} + +void hdmi_dump_regs(struct seq_file *s) +{ + DSSDBG("0x4a100060 x%x\n", omap_readl(0x4A100060)); + DSSDBG("0x4A100088 x%x\n", omap_readl(0x4A100088)); + DSSDBG("0x48055134 x%x\n", omap_readl(0x48055134)); + DSSDBG("0x48055194 x%x\n", omap_readl(0x48055194)); +} -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
