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radeon/audio: consolidate update_acr() functions (v2)

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V2: fix missing dce6 callback

Signed-off-by: Slava Grigorev <slava.grigorev@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Slava Grigorev
2014-12-06 20:19:16 -05:00
committed by Alex Deucher
parent 96ea7afbc2
commit 64424d6e45
5 changed files with 183 additions and 133 deletions
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100
drivers/gpu/drm/radeon/radeon_audio.c
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@@ -22,6 +22,7 @@
* Authors: Slava Grigorev <slava.grigorev@amd.com>
*/
#include <linux/gcd.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include "radeon.h"
@@ -78,6 +79,12 @@ void r600_update_avi_infoframe(struct radeon_device *rdev, u32 offset,
unsigned char *buffer, size_t size);
void evergreen_update_avi_infoframe(struct radeon_device *rdev, u32 offset,
unsigned char *buffer, size_t size);
void r600_hdmi_update_acr(struct drm_encoder *encoder, long offset,
const struct radeon_hdmi_acr *acr);
void dce3_2_hdmi_update_acr(struct drm_encoder *encoder, long offset,
const struct radeon_hdmi_acr *acr);
void evergreen_hdmi_update_acr(struct drm_encoder *encoder, long offset,
const struct radeon_hdmi_acr *acr);
static const u32 pin_offsets[7] =
{
@@ -132,6 +139,7 @@ static struct radeon_audio_basic_funcs dce6_funcs = {
static struct radeon_audio_funcs r600_hdmi_funcs = {
.get_pin = r600_audio_get_pin,
.set_dto = r600_hdmi_audio_set_dto,
.update_acr = r600_hdmi_update_acr,
};
static struct radeon_audio_funcs dce32_hdmi_funcs = {
@@ -139,6 +147,7 @@ static struct radeon_audio_funcs dce32_hdmi_funcs = {
.write_sad_regs = dce3_2_afmt_write_sad_regs,
.write_speaker_allocation = dce3_2_afmt_hdmi_write_speaker_allocation,
.set_dto = dce3_2_audio_set_dto,
.update_acr = dce3_2_hdmi_update_acr,
};
static struct radeon_audio_funcs dce32_dp_funcs = {
@@ -154,6 +163,7 @@ static struct radeon_audio_funcs dce4_hdmi_funcs = {
.write_speaker_allocation = dce4_afmt_hdmi_write_speaker_allocation,
.write_latency_fields = dce4_afmt_write_latency_fields,
.set_dto = dce4_hdmi_audio_set_dto,
.update_acr = evergreen_hdmi_update_acr,
};
static struct radeon_audio_funcs dce4_dp_funcs = {
@@ -171,6 +181,7 @@ static struct radeon_audio_funcs dce6_hdmi_funcs = {
.write_speaker_allocation = dce6_afmt_hdmi_write_speaker_allocation,
.write_latency_fields = dce6_afmt_write_latency_fields,
.set_dto = dce6_hdmi_audio_set_dto,
.update_acr = evergreen_hdmi_update_acr,
};
static struct radeon_audio_funcs dce6_dp_funcs = {
@@ -456,3 +467,92 @@ void radeon_update_avi_infoframe(struct drm_encoder *encoder, void *buffer,
rdev->audio.funcs->update_avi_infoframe(rdev, dig->afmt->offset,
buffer, size);
}
/*
* calculate CTS and N values if they are not found in the table
*/
static void radeon_audio_calc_cts(unsigned int clock, int *CTS, int *N, int freq)
{
int n, cts;
unsigned long div, mul;
/* Safe, but overly large values */
n = 128 * freq;
cts = clock * 1000;
/* Smallest valid fraction */
div = gcd(n, cts);
n /= div;
cts /= div;
/*
* The optimal N is 128*freq/1000. Calculate the closest larger
* value that doesn't truncate any bits.
*/
mul = ((128*freq/1000) + (n-1))/n;
n *= mul;
cts *= mul;
/* Check that we are in spec (not always possible) */
if (n < (128*freq/1500))
printk(KERN_WARNING "Calculated ACR N value is too small. You may experience audio problems.\n");
if (n > (128*freq/300))
printk(KERN_WARNING "Calculated ACR N value is too large. You may experience audio problems.\n");
*N = n;
*CTS = cts;
DRM_DEBUG("Calculated ACR timing N=%d CTS=%d for frequency %d\n",
*N, *CTS, freq);
}
static const struct radeon_hdmi_acr* radeon_audio_acr(unsigned int clock)
{
static struct radeon_hdmi_acr res;
u8 i;
static const struct radeon_hdmi_acr hdmi_predefined_acr[] = {
/* 32kHz 44.1kHz 48kHz */
/* Clock N CTS N CTS N CTS */
{ 25175, 4096, 25175, 28224, 125875, 6144, 25175 }, /* 25,20/1.001 MHz */
{ 25200, 4096, 25200, 6272, 28000, 6144, 25200 }, /* 25.20 MHz */
{ 27000, 4096, 27000, 6272, 30000, 6144, 27000 }, /* 27.00 MHz */
{ 27027, 4096, 27027, 6272, 30030, 6144, 27027 }, /* 27.00*1.001 MHz */
{ 54000, 4096, 54000, 6272, 60000, 6144, 54000 }, /* 54.00 MHz */
{ 54054, 4096, 54054, 6272, 60060, 6144, 54054 }, /* 54.00*1.001 MHz */
{ 74176, 4096, 74176, 5733, 75335, 6144, 74176 }, /* 74.25/1.001 MHz */
{ 74250, 4096, 74250, 6272, 82500, 6144, 74250 }, /* 74.25 MHz */
{ 148352, 4096, 148352, 5733, 150670, 6144, 148352 }, /* 148.50/1.001 MHz */
{ 148500, 4096, 148500, 6272, 165000, 6144, 148500 }, /* 148.50 MHz */
};
/* Precalculated values for common clocks */
for (i = 0; i < ARRAY_SIZE(hdmi_predefined_acr); i++)
if (hdmi_predefined_acr[i].clock == clock)
return &hdmi_predefined_acr[i];
/* And odd clocks get manually calculated */
radeon_audio_calc_cts(clock, &res.cts_32khz, &res.n_32khz, 32000);
radeon_audio_calc_cts(clock, &res.cts_44_1khz, &res.n_44_1khz, 44100);
radeon_audio_calc_cts(clock, &res.cts_48khz, &res.n_48khz, 48000);
return &res;
}
/*
* update the N and CTS parameters for a given pixel clock rate
*/
void radeon_audio_update_acr(struct drm_encoder *encoder, unsigned int clock)
{
const struct radeon_hdmi_acr *acr = radeon_audio_acr(clock);
struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
if (!dig || !dig->afmt)
return;
if (radeon_encoder->audio && radeon_encoder->audio->update_acr)
radeon_encoder->audio->update_acr(encoder, dig->afmt->offset, acr);
}