drm/exynos: enable hdmi audio feature
This patch adds hdmi audio feature for exynos drm.
With this patch, i2s channel feeds audio data in hdmi when hdmi is connected.
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 3583a7b..575a8cb 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1319,6 +1319,169 @@
.power_on = hdmi_display_power_on,
};
+static void hdmi_set_acr(u32 freq, u8 *acr)
+{
+ u32 n, cts;
+
+ switch (freq) {
+ case 32000:
+ n = 4096;
+ cts = 27000;
+ break;
+ case 44100:
+ n = 6272;
+ cts = 30000;
+ break;
+ case 88200:
+ n = 12544;
+ cts = 30000;
+ break;
+ case 176400:
+ n = 25088;
+ cts = 30000;
+ break;
+ case 48000:
+ n = 6144;
+ cts = 27000;
+ break;
+ case 96000:
+ n = 12288;
+ cts = 27000;
+ break;
+ case 192000:
+ n = 24576;
+ cts = 27000;
+ break;
+ default:
+ n = 0;
+ cts = 0;
+ break;
+ }
+
+ acr[1] = cts >> 16;
+ acr[2] = cts >> 8 & 0xff;
+ acr[3] = cts & 0xff;
+
+ acr[4] = n >> 16;
+ acr[5] = n >> 8 & 0xff;
+ acr[6] = n & 0xff;
+}
+
+static void hdmi_reg_acr(struct hdmi_context *hdata, u8 *acr)
+{
+ hdmi_reg_writeb(hdata, HDMI_ACR_N0, acr[6]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_N1, acr[5]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_N2, acr[4]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_MCTS0, acr[3]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_MCTS1, acr[2]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_MCTS2, acr[1]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_CTS0, acr[3]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_CTS1, acr[2]);
+ hdmi_reg_writeb(hdata, HDMI_ACR_CTS2, acr[1]);
+
+ if (hdata->is_v13)
+ hdmi_reg_writeb(hdata, HDMI_V13_ACR_CON, 4);
+ else
+ hdmi_reg_writeb(hdata, HDMI_ACR_CON, 4);
+}
+
+static void hdmi_audio_init(struct hdmi_context *hdata)
+{
+ u32 sample_rate, bits_per_sample, frame_size_code;
+ u32 data_num, bit_ch, sample_frq;
+ u32 val;
+ u8 acr[7];
+
+ sample_rate = 44100;
+ bits_per_sample = 16;
+ frame_size_code = 0;
+
+ switch (bits_per_sample) {
+ case 20:
+ data_num = 2;
+ bit_ch = 1;
+ break;
+ case 24:
+ data_num = 3;
+ bit_ch = 1;
+ break;
+ default:
+ data_num = 1;
+ bit_ch = 0;
+ break;
+ }
+
+ hdmi_set_acr(sample_rate, acr);
+ hdmi_reg_acr(hdata, acr);
+
+ hdmi_reg_writeb(hdata, HDMI_I2S_MUX_CON, HDMI_I2S_IN_DISABLE
+ | HDMI_I2S_AUD_I2S | HDMI_I2S_CUV_I2S_ENABLE
+ | HDMI_I2S_MUX_ENABLE);
+
+ hdmi_reg_writeb(hdata, HDMI_I2S_MUX_CH, HDMI_I2S_CH0_EN
+ | HDMI_I2S_CH1_EN | HDMI_I2S_CH2_EN);
+
+ hdmi_reg_writeb(hdata, HDMI_I2S_MUX_CUV, HDMI_I2S_CUV_RL_EN);
+
+ sample_frq = (sample_rate == 44100) ? 0 :
+ (sample_rate == 48000) ? 2 :
+ (sample_rate == 32000) ? 3 :
+ (sample_rate == 96000) ? 0xa : 0x0;
+
+ hdmi_reg_writeb(hdata, HDMI_I2S_CLK_CON, HDMI_I2S_CLK_DIS);
+ hdmi_reg_writeb(hdata, HDMI_I2S_CLK_CON, HDMI_I2S_CLK_EN);
+
+ val = hdmi_reg_read(hdata, HDMI_I2S_DSD_CON) | 0x01;
+ hdmi_reg_writeb(hdata, HDMI_I2S_DSD_CON, val);
+
+ /* Configuration I2S input ports. Configure I2S_PIN_SEL_0~4 */
+ hdmi_reg_writeb(hdata, HDMI_I2S_PIN_SEL_0, HDMI_I2S_SEL_SCLK(5)
+ | HDMI_I2S_SEL_LRCK(6));
+ hdmi_reg_writeb(hdata, HDMI_I2S_PIN_SEL_1, HDMI_I2S_SEL_SDATA1(1)
+ | HDMI_I2S_SEL_SDATA2(4));
+ hdmi_reg_writeb(hdata, HDMI_I2S_PIN_SEL_2, HDMI_I2S_SEL_SDATA3(1)
+ | HDMI_I2S_SEL_SDATA2(2));
+ hdmi_reg_writeb(hdata, HDMI_I2S_PIN_SEL_3, HDMI_I2S_SEL_DSD(0));
+
+ /* I2S_CON_1 & 2 */
+ hdmi_reg_writeb(hdata, HDMI_I2S_CON_1, HDMI_I2S_SCLK_FALLING_EDGE
+ | HDMI_I2S_L_CH_LOW_POL);
+ hdmi_reg_writeb(hdata, HDMI_I2S_CON_2, HDMI_I2S_MSB_FIRST_MODE
+ | HDMI_I2S_SET_BIT_CH(bit_ch)
+ | HDMI_I2S_SET_SDATA_BIT(data_num)
+ | HDMI_I2S_BASIC_FORMAT);
+
+ /* Configure register related to CUV information */
+ hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_0, HDMI_I2S_CH_STATUS_MODE_0
+ | HDMI_I2S_2AUD_CH_WITHOUT_PREEMPH
+ | HDMI_I2S_COPYRIGHT
+ | HDMI_I2S_LINEAR_PCM
+ | HDMI_I2S_CONSUMER_FORMAT);
+ hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_1, HDMI_I2S_CD_PLAYER);
+ hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_2, HDMI_I2S_SET_SOURCE_NUM(0));
+ hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_3, HDMI_I2S_CLK_ACCUR_LEVEL_2
+ | HDMI_I2S_SET_SMP_FREQ(sample_frq));
+ hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_4,
+ HDMI_I2S_ORG_SMP_FREQ_44_1
+ | HDMI_I2S_WORD_LEN_MAX24_24BITS
+ | HDMI_I2S_WORD_LEN_MAX_24BITS);
+
+ hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_CON, HDMI_I2S_CH_STATUS_RELOAD);
+}
+
+static void hdmi_audio_control(struct hdmi_context *hdata, bool onoff)
+{
+ u32 mod;
+
+ mod = hdmi_reg_read(hdata, HDMI_MODE_SEL);
+ if (mod & HDMI_DVI_MODE_EN)
+ return;
+
+ hdmi_reg_writeb(hdata, HDMI_AUI_CON, onoff ? 2 : 0);
+ hdmi_reg_writemask(hdata, HDMI_CON_0, onoff ?
+ HDMI_ASP_EN : HDMI_ASP_DIS, HDMI_ASP_MASK);
+}
+
static void hdmi_conf_reset(struct hdmi_context *hdata)
{
u32 reg;
@@ -1737,9 +1900,11 @@
hdmi_conf_reset(hdata);
hdmi_conf_init(hdata);
+ hdmi_audio_init(hdata);
/* setting core registers */
hdmi_timing_apply(hdata);
+ hdmi_audio_control(hdata, true);
hdmi_regs_dump(hdata, "start");
}
@@ -1825,6 +1990,7 @@
DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
if (hdata->enabled) {
+ hdmi_audio_control(hdata, false);
hdmiphy_conf_reset(hdata);
hdmi_conf_reset(hdata);
}
@@ -1983,6 +2149,7 @@
hdmiphy_conf_reset(hdata);
hdmi_conf_reset(hdata);
hdmi_conf_init(hdata);
+ hdmi_audio_init(hdata);
}
static void hdmi_resource_poweroff(struct hdmi_context *hdata)