[PATCH v10 21/21] drm/mediatek: DP audio support for mt8195

This patch adds audio support to the DP driver for mt8195 with up to 8 channels.

Signed-off-by: Guillaume Ranquet granquet@baylibre.com --- drivers/gpu/drm/mediatek/mtk_dp.c | 784 +++++++++++++++++++++++++++++- 1 file changed, 777 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index c056bc3ca9f6..05da6565c7f9 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -108,9 +108,41 @@ enum mtk_dp_color_depth { MTK_DP_COLOR_DEPTH_UNKNOWN = 5, };

+enum mtk_dp_sdp_type { + MTK_DP_SDP_NONE = 0x00, + MTK_DP_SDP_ACM = 0x01, + MTK_DP_SDP_ISRC = 0x02, + MTK_DP_SDP_AVI = 0x03, + MTK_DP_SDP_AUI = 0x04, + MTK_DP_SDP_SPD = 0x05, + MTK_DP_SDP_MPEG = 0x06, + MTK_DP_SDP_NTSC = 0x07, + MTK_DP_SDP_VSP = 0x08, + MTK_DP_SDP_VSC = 0x09, + MTK_DP_SDP_EXT = 0x0A, + MTK_DP_SDP_PPS0 = 0x0B, + MTK_DP_SDP_PPS1 = 0x0C, + MTK_DP_SDP_PPS2 = 0x0D, + MTK_DP_SDP_PPS3 = 0x0E, + MTK_DP_SDP_DRM = 0x10, + MTK_DP_SDP_MAX_NUM +}; + +struct mtk_dp_sdp_packet { + enum mtk_dp_sdp_type type; + struct dp_sdp sdp; +}; + +struct mtk_dp_audio_cfg { + int sample_rate; + int word_length_bits; + int channels; +}; + struct mtk_dp_info { enum mtk_dp_color_depth depth; enum dp_pixelformat format; + struct mtk_dp_audio_cfg audio_caps; struct mtk_dp_timings timings; };

@@ -148,10 +180,22 @@ struct mtk_dp { struct clk *dp_tx_clk;

bool enabled; + bool audio_enable;

bool has_fec; /* Protects the mtk_dp struct */ struct mutex dp_lock; + /* Protects the plugged_cb as it's used in both bridge ops and audio */ + struct mutex update_plugged_status_lock; + /* Protects the eld data as it's used in both bridge ops and audio */ + struct mutex eld_lock; + /* Protects edid as it is used in both bridge ops and IRQ handler */ + struct mutex edid_lock; + struct edid *edid; + + hdmi_codec_plugged_cb plugged_cb; + struct device *codec_dev; + u8 connector_eld[MAX_ELD_BYTES];

struct drm_connector *conn; bool need_debounce; @@ -512,15 +556,363 @@ static int mtk_dp_pg_disable(struct mtk_dp *mtk_dp) return ret; }

+static int mtk_dp_audio_setup_channels(struct mtk_dp *mtk_dp, + struct mtk_dp_audio_cfg *cfg) +{ + int ret; + u32 channel_enable_bits; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3324, + AUDIO_SOURCE_MUX_DP_ENC1_P0_DPRX, + AUDIO_SOURCE_MUX_DP_ENC1_P0_MASK); + if (ret) + return ret; + + /* audio channel count change reset */ + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4, BIT(9), BIT(9)); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3304, + AU_PRTY_REGEN_DP_ENC1_P0_MASK, + AU_PRTY_REGEN_DP_ENC1_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3304, + AU_CH_STS_REGEN_DP_ENC1_P0_MASK, + AU_CH_STS_REGEN_DP_ENC1_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3304, + AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK, + AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK); + if (ret) + return ret; + + switch (cfg->channels) { + case 2: + channel_enable_bits = AUDIO_2CH_SEL_DP_ENC0_P0_MASK | + AUDIO_2CH_EN_DP_ENC0_P0_MASK; + break; + case 8: + default: + channel_enable_bits = AUDIO_8CH_SEL_DP_ENC0_P0_MASK | + AUDIO_8CH_EN_DP_ENC0_P0_MASK; + break; + } + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088, + channel_enable_bits | AU_EN_DP_ENC0_P0_MASK, + AUDIO_2CH_SEL_DP_ENC0_P0_MASK | AUDIO_2CH_EN_DP_ENC0_P0_MASK | + AUDIO_8CH_SEL_DP_ENC0_P0_MASK | + AUDIO_8CH_EN_DP_ENC0_P0_MASK | AU_EN_DP_ENC0_P0_MASK); + if (ret) + return ret; + + /* audio channel count change reset */ + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4, 0, BIT(9)); + if (ret) + return ret; + + /* enable audio reset */ + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4, BIT(0), BIT(0)); + + return ret; +} + +static int mtk_dp_audio_channel_status_set(struct mtk_dp *mtk_dp, + struct mtk_dp_audio_cfg *cfg) +{ + int ret; + struct snd_aes_iec958 iec = { 0 }; + + switch (cfg->sample_rate) { + case 32000: + iec.status[3] = IEC958_AES3_CON_FS_32000; + break; + case 44100: + iec.status[3] = IEC958_AES3_CON_FS_44100; + break; + case 48000: + iec.status[3] = IEC958_AES3_CON_FS_48000; + break; + case 88200: + iec.status[3] = IEC958_AES3_CON_FS_88200; + break; + case 96000: + iec.status[3] = IEC958_AES3_CON_FS_96000; + break; + case 192000: + iec.status[3] = IEC958_AES3_CON_FS_192000; + break; + default: + iec.status[3] = IEC958_AES3_CON_FS_NOTID; + break; + } + + switch (cfg->word_length_bits) { + case 16: + iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16; + break; + case 20: + iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16 | + IEC958_AES4_CON_MAX_WORDLEN_24; + break; + case 24: + iec.status[4] = IEC958_AES4_CON_WORDLEN_24_20 | + IEC958_AES4_CON_MAX_WORDLEN_24; + break; + default: + iec.status[4] = IEC958_AES4_CON_WORDLEN_NOTID; + } + + /* IEC 60958 consumer channel status bits */ + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_308C, + 0, + CH_STATUS_0_DP_ENC0_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3090, + iec.status[3] << 8, + CH_STATUS_1_DP_ENC0_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3094, iec.status[4], + CH_STATUS_2_DP_ENC0_P0_MASK); + + return ret; +} + +static int mtk_dp_audio_sdp_asp_set_channels(struct mtk_dp *mtk_dp, + int channels) +{ + if (channels != 2 && channels != 8) + channels = 8; + + return mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_312C, + (channels - 1) << ASP_HB3_DP_ENC0_P0_SHIFT, + ASP_HB2_DP_ENC0_P0_MASK | ASP_HB3_DP_ENC0_P0_MASK); +} + +static int mtk_dp_audio_set_divider(struct mtk_dp *mtk_dp) +{ + return mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC, + AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2, + AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK); +} + static bool mtk_dp_plug_state(struct mtk_dp *mtk_dp) { return !!(mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3414) & HPD_DB_DP_TRANS_P0_MASK); }

-static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp) +static int mtk_dp_sdp_trigger_packet(struct mtk_dp *mtk_dp, + enum mtk_dp_sdp_type type) +{ + int ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280, type, + SDP_PACKET_TYPE_DP_ENC1_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280, SDP_PACKET_W_DP_ENC1_P0, + SDP_PACKET_W_DP_ENC1_P0); + + return ret; +} + +static void mtk_dp_sdp_set_data(struct mtk_dp *mtk_dp, u8 *data_bytes) +{ + mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_ENC1_P0_3200, data_bytes, 0x10); +} + +static void mtk_dp_sdp_set_header(struct mtk_dp *mtk_dp, + enum mtk_dp_sdp_type type, + struct dp_sdp_header *header) +{ + u32 db_addr; + + switch (type) { + case MTK_DP_SDP_DRM: + db_addr = MTK_DP_ENC0_P0_3138; + break; + case MTK_DP_SDP_PPS0: + case MTK_DP_SDP_PPS1: + case MTK_DP_SDP_PPS2: + case MTK_DP_SDP_PPS3: + db_addr = MTK_DP_ENC0_P0_3130; + break; + default: + db_addr = MTK_DP_ENC0_P0_30D8 + (type - MTK_DP_SDP_ACM) * 8; + } + + mtk_dp_bulk_16bit_write(mtk_dp, db_addr, (u8 *)header, 4); +} + +static const u32 mtk_dp_sdp_type_to_reg[MTK_DP_SDP_MAX_NUM] = { + /* MTK_DP_SDP_NONE => */ 0x0, + /* MTK_DP_SDP_ACM => */ MTK_DP_ENC0_P0_30B4, + /* MTK_DP_SDP_ISRC => */ MTK_DP_ENC0_P0_30B4 + 1, + /* MTK_DP_SDP_AVI => */ MTK_DP_ENC0_P0_30A4 + 1, + /* MTK_DP_SDP_AUI => */ MTK_DP_ENC0_P0_30A8, + /* MTK_DP_SDP_SPD => */ MTK_DP_ENC0_P0_30A8 + 1, + /* MTK_DP_SDP_MPEG => */ MTK_DP_ENC0_P0_30AC, + /* MTK_DP_SDP_NTSC => */ MTK_DP_ENC0_P0_30AC + 1, + /* MTK_DP_SDP_VSP => */ MTK_DP_ENC0_P0_30B0, + /* MTK_DP_SDP_VSC => */ MTK_DP_ENC0_P0_30B8, + /* MTK_DP_SDP_EXT => */ MTK_DP_ENC0_P0_30B0 + 1, + /* MTK_DP_SDP_PPS0 => */ MTK_DP_ENC0_P0_31E8, + /* MTK_DP_SDP_PPS1 => */ MTK_DP_ENC0_P0_31E8, + /* MTK_DP_SDP_PPS2 => */ MTK_DP_ENC0_P0_31E8, + /* MTK_DP_SDP_PPS3 => */ MTK_DP_ENC0_P0_31E8, + /* MTK_DP_SDP_DRM => */ MTK_DP_ENC0_P0_31DC, +}; + +static int mtk_dp_disable_sdp(struct mtk_dp *mtk_dp, enum mtk_dp_sdp_type type) +{ + if (type == MTK_DP_SDP_NONE) + return -EINVAL; + + /* Disable periodic send */ + return mtk_dp_update_bits(mtk_dp, mtk_dp_sdp_type_to_reg[type] & 0xfffc, 0, + 0xFF << ((mtk_dp_sdp_type_to_reg[type] & 3) * 8)); +} + +static int mtk_dp_setup_sdp(struct mtk_dp *mtk_dp, + struct mtk_dp_sdp_packet *packet) +{ + int ret = -EINVAL; + + mtk_dp_sdp_set_data(mtk_dp, packet->sdp.db); + mtk_dp_sdp_set_header(mtk_dp, packet->type, &packet->sdp.sdp_header); + + mtk_dp_disable_sdp(mtk_dp, packet->type); + + switch (packet->type) { + case MTK_DP_SDP_NONE: + break; + case MTK_DP_SDP_ISRC: + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC, + 0x1C << ISRC1_HB3_DP_ENC0_P0_SHIFT, + ISRC1_HB3_DP_ENC0_P0_MASK); + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280, MTK_DP_SDP_ISRC, + SDP_PACKET_TYPE_DP_ENC1_P0_MASK); + if (ret) + break; + + if (packet->sdp.sdp_header.HB3 & BIT(2)) + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC, + BIT(ISRC_CONT_DP_ENC0_P0_SHIFT), + ISRC_CONT_DP_ENC0_P0_MASK); + else + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC, 0, + ISRC_CONT_DP_ENC0_P0_MASK); + + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280, + SDP_PACKET_W_DP_ENC1_P0, + SDP_PACKET_W_DP_ENC1_P0); + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30B4, + 5 << ISRC_CFG_DP_ENC0_P0_SHIFT, + ISRC_CFG_DP_ENC0_P0_MASK); + break; + case MTK_DP_SDP_DRM: + mtk_dp_sdp_trigger_packet(mtk_dp, packet->type); + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31DC, + 5 << HDR0_CFG_DP_ENC0_P0_SHIFT, + HDR0_CFG_DP_ENC0_P0_MASK); + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC, + 0x1C << ISRC1_HB3_DP_ENC0_P0_SHIFT, + ISRC1_HB3_DP_ENC0_P0_MASK); + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280, MTK_DP_SDP_ISRC, + SDP_PACKET_TYPE_DP_ENC1_P0_MASK); + if (ret) + break; + + if (packet->sdp.sdp_header.HB3 & BIT(2)) + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC, + BIT(ISRC_CONT_DP_ENC0_P0_SHIFT), + ISRC_CONT_DP_ENC0_P0_MASK); + else + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC, 0, + ISRC_CONT_DP_ENC0_P0_MASK); + + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280, + SDP_PACKET_W_DP_ENC1_P0, + SDP_PACKET_W_DP_ENC1_P0); + if (ret) + break; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30B4, + 5 << ISRC_CFG_DP_ENC0_P0_SHIFT, + ISRC_CFG_DP_ENC0_P0_MASK); + break; + case MTK_DP_SDP_ACM: + case MTK_DP_SDP_AVI: + case MTK_DP_SDP_AUI: + case MTK_DP_SDP_SPD: + case MTK_DP_SDP_MPEG: + case MTK_DP_SDP_NTSC: + case MTK_DP_SDP_VSP: + case MTK_DP_SDP_VSC: + case MTK_DP_SDP_EXT: + case MTK_DP_SDP_PPS0: + case MTK_DP_SDP_PPS1: + case MTK_DP_SDP_PPS2: + case MTK_DP_SDP_PPS3: + mtk_dp_sdp_trigger_packet(mtk_dp, packet->type); + /* Enable periodic sending */ + ret = mtk_dp_update_bits(mtk_dp, + mtk_dp_sdp_type_to_reg[packet->type] & 0xfffc, + 0x05 << ((mtk_dp_sdp_type_to_reg[packet->type] & 3) * 8), + 0xff << ((mtk_dp_sdp_type_to_reg[packet->type] & 3) * 8)); + break; + default: + break; + } + + return ret; +} + +static int mtk_dp_sdp_vsc_ext_disable(struct mtk_dp *mtk_dp) +{ + int ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A0, 0, + BIT(7) | BIT(8) | BIT(12)); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_328C, 0, BIT(7)); + + return ret; +} + +static int mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp) { - mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, + return mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, BIT(AUX_400US_TIMEOUT_IRQ_AUX_TX_P0_SHIFT) | BIT(AUX_RX_DATA_RECV_IRQ_AUX_TX_P0_SHIFT) | BIT(AUX_RX_ADDR_RECV_IRQ_AUX_TX_P0_SHIFT) | @@ -1244,20 +1636,71 @@ static int mtk_dp_training_set_scramble(struct mtk_dp *mtk_dp, bool enable) DP_SCR_EN_DP_TRANS_P0_MASK); }

-static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable) +static int mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable) { + int ret; u32 val = BIT(VIDEO_MUTE_SEL_DP_ENC0_P0_SHIFT);

if (enable) val |= BIT(VIDEO_MUTE_SW_DP_ENC0_P0_SHIFT); - mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000, val, - VIDEO_MUTE_SEL_DP_ENC0_P0_MASK | - VIDEO_MUTE_SW_DP_ENC0_P0_MASK); + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000, val, + VIDEO_MUTE_SEL_DP_ENC0_P0_MASK | VIDEO_MUTE_SW_DP_ENC0_P0_MASK); + + if (ret) + return ret;

if (mtk_dp_is_edp(mtk_dp)) mtk_dp_sip_atf_call(MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE, enable); else mtk_dp_sip_atf_call(MTK_DP_SIP_ATF_VIDEO_UNMUTE, enable); + + return 0; +} + +static int mtk_dp_audio_mute(struct mtk_dp *mtk_dp, bool mute) +{ + int ret; + + if (mute) { + ret = mtk_dp_update_bits(mtk_dp, + MTK_DP_ENC0_P0_3030, + BIT(VBID_AUDIO_MUTE_SW_DP_ENC0_P0_SHIFT) | + BIT(VBID_AUDIO_MUTE_SEL_DP_ENC0_P0_SHIFT), + VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0_MASK | + VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088, 0, + AU_EN_DP_ENC0_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A4, 0, + AU_TS_CFG_DP_ENC0_P0_MASK); + if (ret) + return ret; + + } else { + ret = mtk_dp_update_bits(mtk_dp, + MTK_DP_ENC0_P0_3030, 0, + VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0_MASK | + VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0_MASK); + if (ret) + return ret; + + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088, + BIT(AU_EN_DP_ENC0_P0_SHIFT), + AU_EN_DP_ENC0_P0_MASK); + if (ret) + return ret; + + /* Send one every two frames */ + ret = mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A4, 0x0F, + AU_TS_CFG_DP_ENC0_P0_MASK); + } + + return ret; }

static int mtk_dp_power_enable(struct mtk_dp *mtk_dp) @@ -1327,6 +1770,83 @@ static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp) mtk_dp->info.timings.frame_rate = 60;

mtk_dp->has_fec = false; + mtk_dp->audio_enable = false; +} + +static int mtk_dp_sdp_set_down_cnt_init(struct mtk_dp *mtk_dp, + u32 sram_read_start) +{ + u32 sdp_down_cnt_init = 0; + u32 dc_offset; + struct drm_display_mode mode; + struct mtk_dp_timings *timings = &mtk_dp->info.timings; + + drm_display_mode_from_videomode(&timings->vm, &mode); + + if (mtk_dp->info.timings.pix_rate_khz > 0) + sdp_down_cnt_init = sram_read_start * + mtk_dp->train_info.link_rate * 2700 * 8 / + (timings->pix_rate_khz * 4); + + switch (mtk_dp->train_info.lane_count) { + case 1: + sdp_down_cnt_init = sdp_down_cnt_init > 0x1A ? + sdp_down_cnt_init : + 0x1A; /* 26 */ + break; + case 2: + /* case for LowResolution && High Audio Sample Rate */ + dc_offset = mode.vtotal <= 525 ? 0x04 : 0x00; + sdp_down_cnt_init = sdp_down_cnt_init > 0x10 ? + sdp_down_cnt_init : + 0x10 + dc_offset; /* 20 or 16 */ + break; + case 4: + default: + sdp_down_cnt_init = + sdp_down_cnt_init > 0x06 ? sdp_down_cnt_init : 0x06; /*6 */ + break; + } + + return mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040, + sdp_down_cnt_init + << SDP_DOWN_CNT_INIT_DP_ENC0_P0_SHIFT, + SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK); +} + +static int mtk_dp_sdp_set_down_cnt_init_in_hblank(struct mtk_dp *mtk_dp) +{ + int pix_clk_mhz; + u32 dc_offset; + u32 spd_down_cnt_init = 0; + struct drm_display_mode mode; + struct mtk_dp_timings *timings = &mtk_dp->info.timings; + + drm_display_mode_from_videomode(&timings->vm, &mode); + + pix_clk_mhz = mtk_dp->info.format == DP_PIXELFORMAT_YUV420 ? + mtk_dp->info.timings.pix_rate_khz / 2000 : + mtk_dp->info.timings.pix_rate_khz / 1000; + + switch (mtk_dp->train_info.lane_count) { + case 1: + spd_down_cnt_init = 0x20; + break; + case 2: + dc_offset = (mode.vtotal <= 525) ? 0x14 : 0x00; + spd_down_cnt_init = 0x18 + dc_offset; + break; + case 4: + default: + dc_offset = (mode.vtotal <= 525) ? 0x08 : 0x00; + if (pix_clk_mhz > mtk_dp->train_info.link_rate * 27) + spd_down_cnt_init = 0x8; + else + spd_down_cnt_init = 0x10 + dc_offset; + break; + } + return mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364, spd_down_cnt_init, + SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK); }

static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp) @@ -1343,6 +1863,8 @@ static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp) }

mtk_dp_setup_encoder(mtk_dp); + mtk_dp_sdp_set_down_cnt_init_in_hblank(mtk_dp); + mtk_dp_sdp_set_down_cnt_init(mtk_dp, sram_read_start); }

static void mtk_dp_calculate_pixrate(struct mtk_dp *mtk_dp) @@ -1420,6 +1942,17 @@ static int mtk_dp_hpd_sink_event(struct mtk_dp *mtk_dp) return 0; }

+static void mtk_dp_sdp_stop_sending(struct mtk_dp *mtk_dp) +{ + u8 packet_type; + + for (packet_type = MTK_DP_SDP_ACM; packet_type < MTK_DP_SDP_MAX_NUM; + packet_type++) + mtk_dp_disable_sdp(mtk_dp, packet_type); + + mtk_dp_sdp_vsc_ext_disable(mtk_dp); +} + static void mtk_dp_train_update_swing_pre(struct mtk_dp *mtk_dp, int lanes, u8 dpcd_adjust_req[2]) { @@ -1725,6 +2258,52 @@ static bool mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp) return true; }

+static int mtk_dp_edid_parse_audio_capabilities(struct mtk_dp *mtk_dp, + struct mtk_dp_audio_cfg *cfg) +{ + struct cea_sad *sads; + int sad_count; + int i; + int ret = 0; + + mutex_lock(&mtk_dp->edid_lock); + if (!mtk_dp->edid) { + mutex_unlock(&mtk_dp->edid_lock); + dev_err(mtk_dp->dev, "EDID not found!\n"); + return -EINVAL; + } + + sad_count = drm_edid_to_sad(mtk_dp->edid, &sads); + mutex_unlock(&mtk_dp->edid_lock); + if (sad_count <= 0) { + drm_info(mtk_dp->drm_dev, "The SADs is NULL\n"); + return 0; + } + + for (i = 0; i < sad_count; i++) { + int sample_rate; + int word_length; + /* Only PCM supported at the moment */ + if (sads[i].format != HDMI_AUDIO_CODING_TYPE_PCM) + continue; + + sample_rate = drm_cea_sad_get_sample_rate(&sads[i]); + word_length = + drm_cea_sad_get_uncompressed_word_length(&sads[i]); + if (sample_rate <= 0 || word_length <= 0) + continue; + + cfg->channels = sads[i].channels; + cfg->word_length_bits = word_length; + cfg->sample_rate = sample_rate; + ret = 1; + break; + } + kfree(sads); + + return ret; +} + static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp) { phy_reset(mtk_dp->phy); @@ -1830,6 +2409,48 @@ static void mtk_dp_video_enable(struct mtk_dp *mtk_dp, bool enable) } }

+static void mtk_dp_audio_sdp_setup(struct mtk_dp *mtk_dp, + struct mtk_dp_audio_cfg *cfg) +{ + struct mtk_dp_sdp_packet packet; + struct hdmi_audio_infoframe frame; + + hdmi_audio_infoframe_init(&frame); + frame.coding_type = HDMI_AUDIO_CODING_TYPE_PCM; + frame.channels = cfg->channels; + frame.sample_frequency = cfg->sample_rate; + + switch (cfg->word_length_bits) { + case 16: + frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_16; + break; + case 20: + frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_20; + break; + case 24: + default: + frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_24; + break; + } + + packet.type = MTK_DP_SDP_AUI; + hdmi_audio_infoframe_pack_for_dp(&frame, &packet.sdp, + MTK_DP_DP_VERSION_11); + + mtk_dp_audio_sdp_asp_set_channels(mtk_dp, cfg->channels); + mtk_dp_setup_sdp(mtk_dp, &packet); +} + +static void mtk_dp_audio_setup(struct mtk_dp *mtk_dp, + struct mtk_dp_audio_cfg *cfg) +{ + mtk_dp_audio_sdp_setup(mtk_dp, cfg); + mtk_dp_audio_channel_status_set(mtk_dp, cfg); + + mtk_dp_audio_setup_channels(mtk_dp, cfg); + mtk_dp_audio_set_divider(mtk_dp); +} + static void mtk_dp_video_config(struct mtk_dp *mtk_dp) { mtk_dp_mn_overwrite_disable(mtk_dp); @@ -1845,6 +2466,7 @@ static void mtk_dp_state_handler(struct mtk_dp *mtk_dp) switch (mtk_dp->state) { case MTK_DP_STATE_INITIAL: mtk_dp_video_mute(mtk_dp, true); + mtk_dp_audio_mute(mtk_dp, true); mtk_dp->state = MTK_DP_STATE_IDLE; break;

@@ -1857,12 +2479,19 @@ static void mtk_dp_state_handler(struct mtk_dp *mtk_dp) mtk_dp_video_config(mtk_dp); mtk_dp_video_enable(mtk_dp, true);

+ if (mtk_dp->audio_enable) { + mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_caps); + mtk_dp_audio_mute(mtk_dp, false); + } + mtk_dp->state = MTK_DP_STATE_NORMAL; break;

case MTK_DP_STATE_NORMAL: if (mtk_dp->train_state != MTK_DP_TRAIN_STATE_NORMAL) { mtk_dp_video_mute(mtk_dp, true); + mtk_dp_audio_mute(mtk_dp, true); + mtk_dp_sdp_stop_sending(mtk_dp); mtk_dp->state = MTK_DP_STATE_IDLE; } break; @@ -1901,7 +2530,15 @@ static int mtk_dp_train_handler(struct mtk_dp *mtk_dp) } break;

- case MTK_DP_TRAIN_STATE_CHECKEDID: + case MTK_DP_TRAIN_STATE_CHECKEDID: { + int caps_found = mtk_dp_edid_parse_audio_capabilities(mtk_dp, + &mtk_dp->info.audio_caps); + mtk_dp->audio_enable = caps_found > 0; + if (!mtk_dp->audio_enable) + memset(&mtk_dp->info.audio_caps, 0, + sizeof(mtk_dp->info.audio_caps)); + } + mtk_dp->train_state = MTK_DP_TRAIN_STATE_TRAINING_PRE; break;

@@ -1914,6 +2551,7 @@ static int mtk_dp_train_handler(struct mtk_dp *mtk_dp) ret = mtk_dp_train_start(mtk_dp); if (ret == 0) { mtk_dp_video_mute(mtk_dp, true); + mtk_dp_audio_mute(mtk_dp, true); mtk_dp->train_state = MTK_DP_TRAIN_STATE_NORMAL; mtk_dp_fec_enable(mtk_dp, mtk_dp->has_fec); } else if (ret != -EAGAIN) { @@ -1988,11 +2626,13 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev) if (!mtk_dp->train_info.cable_plugged_in || !mtk_dp_plug_state(mtk_dp)) { mtk_dp_video_mute(mtk_dp, true); + mtk_dp_audio_mute(mtk_dp, true);

mtk_dp_initialize_priv_data(mtk_dp); mtk_dp_set_idle_pattern(mtk_dp, true); if (mtk_dp->has_fec) mtk_dp_fec_enable(mtk_dp, false); + mtk_dp_sdp_stop_sending(mtk_dp);

mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, DP_PWR_STATE_BANDGAP_TPLL, @@ -2107,6 +2747,18 @@ static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp, return ret; }

+static void mtk_dp_update_plugged_status(struct mtk_dp *mtk_dp) +{ + bool connected, has_audio; + + mutex_lock(&mtk_dp->update_plugged_status_lock); + connected = mtk_dp_plug_state(mtk_dp); + has_audio = drm_detect_monitor_audio(mtk_dp->edid); + if (mtk_dp->plugged_cb && mtk_dp->codec_dev) + mtk_dp->plugged_cb(mtk_dp->codec_dev, connected & has_audio); + mutex_unlock(&mtk_dp->update_plugged_status_lock); +} + static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge) { struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge); @@ -2122,6 +2774,7 @@ static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge) ret = connector_status_connected; }

+ mtk_dp_update_plugged_status(mtk_dp); return ret; }

@@ -2308,6 +2961,7 @@ static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge, struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);

mtk_dp_video_mute(mtk_dp, true); + mtk_dp_audio_mute(mtk_dp, true); mtk_dp->state = MTK_DP_STATE_IDLE; mtk_dp->train_state = MTK_DP_TRAIN_STATE_STARTUP;

@@ -2345,6 +2999,10 @@ static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge, return; }

+ mutex_lock(&mtk_dp->eld_lock); + memcpy(mtk_dp->connector_eld, mtk_dp->conn->eld, MAX_ELD_BYTES); + mutex_unlock(&mtk_dp->eld_lock); + mtk_dp->enabled = true; }

@@ -2491,6 +3149,104 @@ static void mtk_dp_debounce_timer(struct timer_list *t) mtk_dp->need_debounce = true; }

+/* + * HDMI audio codec callbacks + */ +static int mtk_dp_audio_hw_params(struct device *dev, void *data, + struct hdmi_codec_daifmt *daifmt, + struct hdmi_codec_params *params) +{ + struct mtk_dp *mtk_dp = dev_get_drvdata(dev); + struct mtk_dp_audio_cfg cfg; + + if (!mtk_dp->enabled) { + pr_err("%s, DP is not ready!\n", __func__); + return -ENODEV; + } + + cfg.channels = params->cea.channels; + cfg.sample_rate = params->sample_rate; + cfg.word_length_bits = 24; + + mtk_dp_audio_setup(mtk_dp, &cfg); + + return 0; +} + +static int mtk_dp_audio_startup(struct device *dev, void *data) +{ + struct mtk_dp *mtk_dp = dev_get_drvdata(dev); + + mtk_dp_audio_mute(mtk_dp, false); + + return 0; +} + +static void mtk_dp_audio_shutdown(struct device *dev, void *data) +{ + struct mtk_dp *mtk_dp = dev_get_drvdata(dev); + + mtk_dp_audio_mute(mtk_dp, true); +} + +static int mtk_dp_audio_get_eld(struct device *dev, void *data, uint8_t *buf, + size_t len) +{ + struct mtk_dp *mtk_dp = dev_get_drvdata(dev); + + if (mtk_dp->enabled) + memcpy(buf, mtk_dp->connector_eld, len); + else + memset(buf, 0, len); + + return 0; +} + +static int mtk_dp_audio_hook_plugged_cb(struct device *dev, void *data, + hdmi_codec_plugged_cb fn, + struct device *codec_dev) +{ + struct mtk_dp *mtk_dp = data; + + mutex_lock(&mtk_dp->update_plugged_status_lock); + mtk_dp->plugged_cb = fn; + mtk_dp->codec_dev = codec_dev; + mutex_unlock(&mtk_dp->update_plugged_status_lock); + + mtk_dp_update_plugged_status(mtk_dp); + + return 0; +} + +static const struct hdmi_codec_ops mtk_dp_audio_codec_ops = { + .hw_params = mtk_dp_audio_hw_params, + .audio_startup = mtk_dp_audio_startup, + .audio_shutdown = mtk_dp_audio_shutdown, + .get_eld = mtk_dp_audio_get_eld, + .hook_plugged_cb = mtk_dp_audio_hook_plugged_cb, + .no_capture_mute = 1, +}; + +static int mtk_dp_register_audio_driver(struct device *dev) +{ + struct mtk_dp *mtk_dp = dev_get_drvdata(dev); + struct hdmi_codec_pdata codec_data = { + .ops = &mtk_dp_audio_codec_ops, + .max_i2s_channels = 8, + .i2s = 1, + .data = mtk_dp, + }; + struct platform_device *pdev; + + pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, &codec_data, + sizeof(codec_data)); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + return 0; +} + static int mtk_dp_probe(struct platform_device *pdev) { struct mtk_dp *mtk_dp; @@ -2534,9 +3290,21 @@ static int mtk_dp_probe(struct platform_device *pdev) return dev_err_probe(dev, -EPROBE_DEFER, "failed to request mediatek dptx irq\n");

mutex_init(&mtk_dp->dp_lock); + mutex_init(&mtk_dp->edid_lock); + mutex_init(&mtk_dp->eld_lock); + mutex_init(&mtk_dp->update_plugged_status_lock);

platform_set_drvdata(pdev, mtk_dp);

+ if (!mtk_dp_is_edp(mtk_dp)) { + ret = mtk_dp_register_audio_driver(dev); + if (ret) { + dev_err(dev, "Failed to register audio driver: %d\n", + ret); + return ret; + } + } + mtk_dp->phy_dev = platform_device_register_data(dev, "mediatek-dp-phy", PLATFORM_DEVID_AUTO, &mtk_dp->regs, @@ -2579,6 +3347,7 @@ static int mtk_dp_remove(struct platform_device *pdev)

platform_device_unregister(mtk_dp->phy_dev); mtk_dp_video_mute(mtk_dp, true); + mtk_dp_audio_mute(mtk_dp, true); del_timer_sync(&mtk_dp->debounce_timer);

pm_runtime_disable(&pdev->dev);