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OMAPDSS: HDMI: PHY changes for OMAP5 

OMAP5 HDMI PHY has some differences compared to OMAP4 HDMI PHY. This
patch creates a features struct which help the driver configure the PHY
based on what SoC it is.

Some of the features aren't currenlty used, but will come in use later.

Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Archit Taneja 2013-09-23 12:58:52 +05:30 committed by Tomi Valkeinen
parent 8955b727af
commit 19289fdcbe
2 changed files with 94 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/video/fbdev/omap2/dss/hdmi.h
View File

@ -80,6 +80,7 @@
#define HDMI_TXPHY_DIGITAL_CTRL 0x4
#define HDMI_TXPHY_POWER_CTRL 0x8
#define HDMI_TXPHY_PAD_CFG_CTRL 0xC
#define HDMI_TXPHY_BIST_CONTROL 0x1C
enum hdmi_pll_pwr {
HDMI_PLLPWRCMD_ALLOFF = 0,

95
drivers/video/fbdev/omap2/dss/hdmi_phy.c
View File

@ -12,11 +12,22 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <video/omapdss.h>
#include "dss.h"
#include "hdmi.h"
struct hdmi_phy_features {
bool bist_ctrl;
bool calc_freqout;
bool ldo_voltage;
unsigned long dcofreq_min;
unsigned long max_phy;
};
static const struct hdmi_phy_features *phy_feat;
void hdmi_phy_dump(struct hdmi_phy_data *phy, struct seq_file *s)
{
#define DUMPPHY(r) seq_printf(s, "%-35s %08x\n", #r,\
@ -26,6 +37,8 @@ void hdmi_phy_dump(struct hdmi_phy_data *phy, struct seq_file *s)
DUMPPHY(HDMI_TXPHY_DIGITAL_CTRL);
DUMPPHY(HDMI_TXPHY_POWER_CTRL);
DUMPPHY(HDMI_TXPHY_PAD_CFG_CTRL);
if (phy_feat->bist_ctrl)
DUMPPHY(HDMI_TXPHY_BIST_CONTROL);
}
int hdmi_phy_parse_lanes(struct hdmi_phy_data *phy, const u32 *lanes)
@ -121,23 +134,48 @@ static void hdmi_phy_configure_lanes(struct hdmi_phy_data *phy)
int hdmi_phy_configure(struct hdmi_phy_data *phy, struct hdmi_config *cfg)
{
u8 freqout;
/*
* Read address 0 in order to get the SCP reset done completed
* Dummy access performed to make sure reset is done
*/
hdmi_read_reg(phy->base, HDMI_TXPHY_TX_CTRL);
/*
* In OMAP5+, the HFBITCLK must be divided by 2 before issuing the
* HDMI_PHYPWRCMD_LDOON command.
*/
if (phy_feat->bist_ctrl)
REG_FLD_MOD(phy->base, HDMI_TXPHY_BIST_CONTROL, 1, 11, 11);
if (phy_feat->calc_freqout) {
/* DCOCLK/10 is pixel clock, compare pclk with DCOCLK_MIN/10 */
u32 dco_min = phy_feat->dcofreq_min / 10;
u32 pclk = cfg->timings.pixelclock;
if (pclk < dco_min)
freqout = 0;
else if ((pclk >= dco_min) && (pclk < phy_feat->max_phy))
freqout = 1;
else
freqout = 2;
} else {
freqout = 1;
}
/*
* Write to phy address 0 to configure the clock
* use HFBITCLK write HDMI_TXPHY_TX_CONTROL_FREQOUT field
*/
REG_FLD_MOD(phy->base, HDMI_TXPHY_TX_CTRL, 0x1, 31, 30);
REG_FLD_MOD(phy->base, HDMI_TXPHY_TX_CTRL, freqout, 31, 30);
/* Write to phy address 1 to start HDMI line (TXVALID and TMDSCLKEN) */
hdmi_write_reg(phy->base, HDMI_TXPHY_DIGITAL_CTRL, 0xF0000000);
/* Setup max LDO voltage */
REG_FLD_MOD(phy->base, HDMI_TXPHY_POWER_CTRL, 0xB, 3, 0);
if (phy_feat->ldo_voltage)
REG_FLD_MOD(phy->base, HDMI_TXPHY_POWER_CTRL, 0xB, 3, 0);
hdmi_phy_configure_lanes(phy);
@ -147,11 +185,64 @@ int hdmi_phy_configure(struct hdmi_phy_data *phy, struct hdmi_config *cfg)
#define PHY_OFFSET 0x300
#define PHY_SIZE 0x100
static const struct hdmi_phy_features omap44xx_phy_feats = {
.bist_ctrl = false,
.calc_freqout = false,
.ldo_voltage = true,
.dcofreq_min = 500000000,
.max_phy = 185675000,
};
static const struct hdmi_phy_features omap54xx_phy_feats = {
.bist_ctrl = true,
.calc_freqout = true,
.ldo_voltage = false,
.dcofreq_min = 750000000,
.max_phy = 186000000,
};
static int hdmi_phy_init_features(struct platform_device *pdev)
{
struct hdmi_phy_features *dst;
const struct hdmi_phy_features *src;
dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
if (!dst) {
dev_err(&pdev->dev, "Failed to allocate HDMI PHY Features\n");
return -ENOMEM;
}
switch (omapdss_get_version()) {
case OMAPDSS_VER_OMAP4430_ES1:
case OMAPDSS_VER_OMAP4430_ES2:
case OMAPDSS_VER_OMAP4:
src = &omap44xx_phy_feats;
break;
case OMAPDSS_VER_OMAP5:
src = &omap54xx_phy_feats;
break;
default:
return -ENODEV;
}
memcpy(dst, src, sizeof(*dst));
phy_feat = dst;
return 0;
}
int hdmi_phy_init(struct platform_device *pdev, struct hdmi_phy_data *phy)
{
int r;
struct resource *res;
struct resource temp_res;
r = hdmi_phy_init_features(pdev);
if (r)
return r;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
if (!res) {
DSSDBG("can't get PHY mem resource by name\n");