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// SPDX-License-Identifier: GPL-2.0
#define DSS_SUBSYS_NAME "HDMI"
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/of.h>
#include <video/omapfb_dss.h>
#include "hdmi.h"
int hdmi_parse_lanes_of(struct platform_device *pdev, struct device_node *ep,
struct hdmi_phy_data *phy)
{
struct property *prop;
int r, len;
prop = of_find_property(ep, "lanes", &len);
if (prop) {
u32 lanes[8];
if (len / sizeof(u32) != ARRAY_SIZE(lanes)) {
dev_err(&pdev->dev, "bad number of lanes\n");
return -EINVAL;
}
r = of_property_read_u32_array(ep, "lanes", lanes,
ARRAY_SIZE(lanes));
if (r) {
dev_err(&pdev->dev, "failed to read lane data\n");
return r;
}
r = hdmi_phy_parse_lanes(phy, lanes);
if (r) {
dev_err(&pdev->dev, "failed to parse lane data\n");
return r;
}
} else {
static const u32 default_lanes[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
r = hdmi_phy_parse_lanes(phy, default_lanes);
if (WARN_ON(r)) {
dev_err(&pdev->dev, "failed to parse lane data\n");
return r;
}
}
return 0;
}
int hdmi_compute_acr(u32 pclk, u32 sample_freq, u32 *n, u32 *cts)
{
u32 deep_color;
bool deep_color_correct = false;
if (n == NULL || cts == NULL)
return -EINVAL;
/* TODO: When implemented, query deep color mode here. */
deep_color = 100;
/*
* When using deep color, the default N value (as in the HDMI
* specification) yields to an non-integer CTS. Hence, we
* modify it while keeping the restrictions described in
* section 7.2.1 of the HDMI 1.4a specification.
*/
switch (sample_freq) {
case 32000:
case 48000:
case 96000:
case 192000:
if (deep_color == 125)
if (pclk == 27027000 || pclk == 74250000)
deep_color_correct = true;
if (deep_color == 150)
if (pclk == 27027000)
deep_color_correct = true;
break;
case 44100:
case 88200:
case 176400:
if (deep_color == 125)
if (pclk == 27027000)
deep_color_correct = true;
break;
default:
return -EINVAL;
}
if (deep_color_correct) {
switch (sample_freq) {
case 32000:
*n = 8192;
break;
case 44100:
*n = 12544;
break;
case 48000:
*n = 8192;
break;
case 88200:
*n = 25088;
break;
case 96000:
*n = 16384;
break;
case 176400:
*n = 50176;
break;
case 192000:
*n = 32768;
break;
default:
return -EINVAL;
}
} else {
switch (sample_freq) {
case 32000:
*n = 4096;
break;
case 44100:
*n = 6272;
break;
case 48000:
*n = 6144;
break;
case 88200:
*n = 12544;
break;
case 96000:
*n = 12288;
break;
case 176400:
*n = 25088;
break;
case 192000:
*n = 24576;
break;
default:
return -EINVAL;
}
}
/* Calculate CTS. See HDMI 1.3a or 1.4a specifications */
*cts = (pclk/1000) * (*n / 128) * deep_color / (sample_freq / 10);
return 0;
}
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