From patchwork Wed Oct 23 11:52:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 13847011 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AE22FCF5365 for ; Wed, 23 Oct 2024 12:20:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7LAxYH1qZiwVBij71GEDkyEywvTTRQkuX8ll0HJqFRI=; b=JoVb71XUB4atqHktIOxnD6cmr3 1DvzO/hV1hUAknW6BjU2DHQyzatnZfvCqnYZ7gHbyXrKHXa19nxbWVnzuu6Y2CaVsCYK2eypXwUoh BPhbQJY1oeMtC3CnkcscFJRZPG3cMRgfBOZ5VUTqnM7lEgvKNqu8KDl7g1oaCBfNmp8bQ8xEibgQA 4iac16Ozf8HT1yCAky1RMPa57blthCq9URFgONzOWO+Hp9tv8r4Hom47p3hqm3Ma1F8j0T/X/Sx20 +KQj7xcye0aUFAOvyDg0Vnrd8dn5M4YoxpMTTiXVK581mfZcqb7TgqQ3sbB9VmYMZaJoowq4boBCN 1h4ty/SA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t3aLL-0000000EIJx-0ATf; Wed, 23 Oct 2024 12:20:03 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t3ZvJ-0000000EEQ7-2IBn for linux-arm-kernel@lists.infradead.org; Wed, 23 Oct 2024 11:53:12 +0000 Received: from [127.0.1.1] (91-157-155-49.elisa-laajakaista.fi [91.157.155.49]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 072E010B6; Wed, 23 Oct 2024 13:51:19 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1729684281; bh=PgnOIIujGZnMd8C6idaoTO7SPdRS5o1rbnzh2NydfdA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=GtxhD5fdDd/Q90QISQCa/OmEBvKh/VmcY4lADZYhkDZYtenvTHhKpprX7gDqGkmCO i9zoOCSXjlBz6SMxj2aHnaYnKdwaGacVDocGPWbiKZXZqVjEQHFgOZV32L4FTWM2Jv YUgEV8Ct0K3z8AiMPQ4eZBDHWA6jVUm7eSaghWZ0= From: Tomi Valkeinen Date: Wed, 23 Oct 2024 14:52:43 +0300 Subject: [PATCH v4 3/3] drm: xlnx: zynqmp_dpsub: Add DP audio support MIME-Version: 1.0 Message-Id: <20241023-xilinx-dp-audio-v4-3-5128881457be@ideasonboard.com> References: <20241023-xilinx-dp-audio-v4-0-5128881457be@ideasonboard.com> In-Reply-To: <20241023-xilinx-dp-audio-v4-0-5128881457be@ideasonboard.com> To: Lars-Peter Clausen , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown , Laurent Pinchart , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Michal Simek , Krzysztof Kozlowski , Simona Vetter Cc: linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Vishal Sagar , Anatoliy Klymenko , =?utf-8?q?P=C3=A9ter_Ujfalu?= =?utf-8?q?si?= , Markus Elfring , Tomi Valkeinen X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=25975; i=tomi.valkeinen@ideasonboard.com; h=from:subject:message-id; bh=PgnOIIujGZnMd8C6idaoTO7SPdRS5o1rbnzh2NydfdA=; b=owEBbQKS/ZANAwAIAfo9qoy8lh71AcsmYgBnGOOeI+b0WIethpq7aL9Cs5MAkv785btF5KAnH k+LD7CQbOeJAjMEAAEIAB0WIQTEOAw+ll79gQef86f6PaqMvJYe9QUCZxjjngAKCRD6PaqMvJYe 9TnND/0YO/YJ7iaB/kW+vyEC9PhtQgFGR9A0vK9RVDUYocVrJkDFgw+x4LnCiYSXderkWkE8UCK MB5qn4FXxsrZt4C3zgULfCijmn6o4LKzkiABSw5wDvTYqOyvwmAh7WNYHnhQXKoZB/lh6uifrbZ wJHB9w7Hc2U7ZDCmMWB/X25fbrVHF/GlVv7EypTzvbevmHj1y1BkRCloDu8Aa47h172hNCcZ0sh SKKDtGC5QOTA0B14Bxd81v7P2omEAVNtaMVnyY7R1+fBIZO+5WZPt7o5PyVqGs4/4n61YL14Ras zVqR36fFZMWp59fxK8E67fh9zXGyToUd3tUYcNXhuZkZ9897jsHM0M855NzY5GIR0ObVETzeMxd Mqh43iGKlzobO0/lBlglGJKcuRrNXhU+CNEKXO03wKvfWgS8NbQwlbddt9XjLkrqG72GS7WYuGC SNyJOcgjwH1LqjAVwf6PJdd4FxayYMkwSs2TXqR05zYF8BOK1PFYW8x+tJAPXd5ANQicvKDFmmu u/vt0QeXXvo/YzaFtkqGgPFUKZxW1gtVGdd4qpdDKJlrvEsahF7HodOeV11GOfnZW2rOXPs2Fca bSl2Lrn2GgMmGMolFdBl4gzwDL/rmvB0JqgW2GKHYSIGrxCx5AFvEdTw9twLj6XdrNiI68lAt2t RSFVlATmhywBGVg== X-Developer-Key: i=tomi.valkeinen@ideasonboard.com; a=openpgp; fpr=C4380C3E965EFD81079FF3A7FA3DAA8CBC961EF5 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241023_045309_939903_CAA6E342 X-CRM114-Status: GOOD ( 29.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add basic DisplayPort audio support. Support non-live audio playback from two PCMs (DMA channels), and the volume control in the audio mixer. As older dtb files may not have the audio DMA channels defined, the driver will just mark the audio support as disabled if the audio DMA is missing, and will continue with only display support. Note: Reset doesn't seem to work (ZYNQMP_DISP_AUD_SOFT_RESET). If we do a reset, audio playback won't start again even if, afaics, we do set up all the necessary registers. So, at the moment, resetting the audio block in dp_dai_hw_free() is commented out. Tested-by: Anatoliy Klymenko Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/xlnx/Kconfig | 9 + drivers/gpu/drm/xlnx/Makefile | 1 + drivers/gpu/drm/xlnx/zynqmp_disp.c | 48 ---- drivers/gpu/drm/xlnx/zynqmp_disp_regs.h | 7 +- drivers/gpu/drm/xlnx/zynqmp_dp.c | 54 ++-- drivers/gpu/drm/xlnx/zynqmp_dp.h | 7 + drivers/gpu/drm/xlnx/zynqmp_dp_audio.c | 447 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 39 +-- drivers/gpu/drm/xlnx/zynqmp_dpsub.h | 15 +- 9 files changed, 526 insertions(+), 101 deletions(-) diff --git a/drivers/gpu/drm/xlnx/Kconfig b/drivers/gpu/drm/xlnx/Kconfig index 626e5ac4c33d..ecd7be347300 100644 --- a/drivers/gpu/drm/xlnx/Kconfig +++ b/drivers/gpu/drm/xlnx/Kconfig @@ -16,3 +16,12 @@ config DRM_ZYNQMP_DPSUB This is a DRM/KMS driver for ZynqMP DisplayPort controller. Choose this option if you have a Xilinx ZynqMP SoC with DisplayPort subsystem. + +config DRM_ZYNQMP_DPSUB_AUDIO + bool "ZynqMP DisplayPort Audio Support" + depends on DRM_ZYNQMP_DPSUB + depends on SND && SND_SOC + select SND_SOC_GENERIC_DMAENGINE_PCM + help + Choose this option to enable DisplayPort audio support in the ZynqMP + DisplayPort driver. diff --git a/drivers/gpu/drm/xlnx/Makefile b/drivers/gpu/drm/xlnx/Makefile index ea1422a39502..ab6e2ffd7e8d 100644 --- a/drivers/gpu/drm/xlnx/Makefile +++ b/drivers/gpu/drm/xlnx/Makefile @@ -1,2 +1,3 @@ zynqmp-dpsub-y := zynqmp_disp.o zynqmp_dpsub.o zynqmp_dp.o zynqmp_kms.o +zynqmp-dpsub-$(CONFIG_DRM_ZYNQMP_DPSUB_AUDIO) += zynqmp_dp_audio.o obj-$(CONFIG_DRM_ZYNQMP_DPSUB) += zynqmp-dpsub.o diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c index 9368acf56eaf..77dc485c0887 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c @@ -143,7 +143,6 @@ struct zynqmp_disp_layer { * @dpsub: Display subsystem * @blend: Register I/O base address for the blender * @avbuf: Register I/O base address for the audio/video buffer manager - * @audio: Registers I/O base address for the audio mixer * @layers: Layers (planes) */ struct zynqmp_disp { @@ -152,7 +151,6 @@ struct zynqmp_disp { void __iomem *blend; void __iomem *avbuf; - void __iomem *audio; struct zynqmp_disp_layer layers[ZYNQMP_DPSUB_NUM_LAYERS]; }; @@ -865,42 +863,6 @@ static void zynqmp_disp_blend_layer_disable(struct zynqmp_disp *disp, csc_zero_offsets); } -/* ----------------------------------------------------------------------------- - * Audio Mixer - */ - -static void zynqmp_disp_audio_write(struct zynqmp_disp *disp, int reg, u32 val) -{ - writel(val, disp->audio + reg); -} - -/** - * zynqmp_disp_audio_enable - Enable the audio mixer - * @disp: Display controller - * - * Enable the audio mixer by de-asserting the soft reset. The audio state is set to - * default values by the reset, set the default mixer volume explicitly. - */ -static void zynqmp_disp_audio_enable(struct zynqmp_disp *disp) -{ - /* Clear the audio soft reset register as it's an non-reset flop. */ - zynqmp_disp_audio_write(disp, ZYNQMP_DISP_AUD_SOFT_RESET, 0); - zynqmp_disp_audio_write(disp, ZYNQMP_DISP_AUD_MIXER_VOLUME, - ZYNQMP_DISP_AUD_MIXER_VOLUME_NO_SCALE); -} - -/** - * zynqmp_disp_audio_disable - Disable the audio mixer - * @disp: Display controller - * - * Disable the audio mixer by asserting its soft reset. - */ -static void zynqmp_disp_audio_disable(struct zynqmp_disp *disp) -{ - zynqmp_disp_audio_write(disp, ZYNQMP_DISP_AUD_SOFT_RESET, - ZYNQMP_DISP_AUD_SOFT_RESET_AUD_SRST); -} - /* ----------------------------------------------------------------------------- * ZynqMP Display Layer & DRM Plane */ @@ -1338,8 +1300,6 @@ void zynqmp_disp_enable(struct zynqmp_disp *disp) disp->dpsub->vid_clk_from_ps); zynqmp_disp_avbuf_enable_channels(disp); zynqmp_disp_avbuf_enable_audio(disp); - - zynqmp_disp_audio_enable(disp); } /** @@ -1348,8 +1308,6 @@ void zynqmp_disp_enable(struct zynqmp_disp *disp) */ void zynqmp_disp_disable(struct zynqmp_disp *disp) { - zynqmp_disp_audio_disable(disp); - zynqmp_disp_avbuf_disable_audio(disp); zynqmp_disp_avbuf_disable_channels(disp); zynqmp_disp_avbuf_disable(disp); @@ -1418,12 +1376,6 @@ int zynqmp_disp_probe(struct zynqmp_dpsub *dpsub) goto error; } - disp->audio = devm_platform_ioremap_resource_byname(pdev, "aud"); - if (IS_ERR(disp->audio)) { - ret = PTR_ERR(disp->audio); - goto error; - } - ret = zynqmp_disp_create_layers(disp); if (ret) goto error; diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h b/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h index fa3935384834..9a4ff094e276 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h +++ b/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h @@ -177,12 +177,7 @@ #define ZYNQMP_DISP_AUD_MIXER_VOLUME 0x0 #define ZYNQMP_DISP_AUD_MIXER_VOLUME_NO_SCALE 0x20002000 #define ZYNQMP_DISP_AUD_MIXER_META_DATA 0x4 -#define ZYNQMP_DISP_AUD_CH_STATUS0 0x8 -#define ZYNQMP_DISP_AUD_CH_STATUS1 0xc -#define ZYNQMP_DISP_AUD_CH_STATUS2 0x10 -#define ZYNQMP_DISP_AUD_CH_STATUS3 0x14 -#define ZYNQMP_DISP_AUD_CH_STATUS4 0x18 -#define ZYNQMP_DISP_AUD_CH_STATUS5 0x1c +#define ZYNQMP_DISP_AUD_CH_STATUS(x) (0x8 + ((x) * 4)) #define ZYNQMP_DISP_AUD_CH_A_DATA0 0x20 #define ZYNQMP_DISP_AUD_CH_A_DATA1 0x24 #define ZYNQMP_DISP_AUD_CH_A_DATA2 0x28 diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index 129beac4c073..af1b4b104067 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -1221,7 +1221,6 @@ static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp, { u8 lane_cnt = dp->mode.lane_cnt; u32 reg, wpl; - unsigned int rate; zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_HTOTAL, mode->htotal); zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_VTOTAL, mode->vtotal); @@ -1246,18 +1245,8 @@ static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp, reg = drm_dp_bw_code_to_link_rate(dp->mode.bw_code); zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_N_VID, reg); zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_M_VID, mode->clock); - rate = zynqmp_dpsub_get_audio_clk_rate(dp->dpsub); - if (rate) { - dev_dbg(dp->dev, "Audio rate: %d\n", rate / 512); - zynqmp_dp_write(dp, ZYNQMP_DP_TX_N_AUD, reg); - zynqmp_dp_write(dp, ZYNQMP_DP_TX_M_AUD, rate / 1000); - } } - /* Only 2 channel audio is supported now */ - if (zynqmp_dpsub_audio_enabled(dp->dpsub)) - zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CHANNELS, 1); - zynqmp_dp_write(dp, ZYNQMP_DP_USER_PIX_WIDTH, 1); /* Translate to the native 16 bit datapath based on IP core spec */ @@ -1266,6 +1255,44 @@ static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp, zynqmp_dp_write(dp, ZYNQMP_DP_USER_DATA_COUNT_PER_LANE, reg); } +/* ----------------------------------------------------------------------------- + * Audio + */ + +void zynqmp_dp_audio_set_channels(struct zynqmp_dp *dp, + unsigned int num_channels) +{ + zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CHANNELS, num_channels - 1); +} + +void zynqmp_dp_audio_enable(struct zynqmp_dp *dp) +{ + zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 1); +} + +void zynqmp_dp_audio_disable(struct zynqmp_dp *dp) +{ + zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 0); +} + +void zynqmp_dp_audio_write_n_m(struct zynqmp_dp *dp) +{ + unsigned int rate; + u32 link_rate; + + if (!(dp->config.misc0 & ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK)) + return; + + link_rate = drm_dp_bw_code_to_link_rate(dp->mode.bw_code); + + rate = clk_get_rate(dp->dpsub->aud_clk); + + dev_dbg(dp->dev, "Audio rate: %d\n", rate / 512); + + zynqmp_dp_write(dp, ZYNQMP_DP_TX_N_AUD, link_rate); + zynqmp_dp_write(dp, ZYNQMP_DP_TX_M_AUD, rate / 1000); +} + /* ----------------------------------------------------------------------------- * DISP Configuration */ @@ -1453,8 +1480,7 @@ static void zynqmp_dp_bridge_atomic_enable(struct drm_bridge *bridge, /* Enable the encoder */ dp->enabled = true; zynqmp_dp_update_misc(dp); - if (zynqmp_dpsub_audio_enabled(dp->dpsub)) - zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 1); + zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN, 0); if (dp->status == connector_status_connected) { for (i = 0; i < 3; i++) { @@ -1487,8 +1513,6 @@ static void zynqmp_dp_bridge_atomic_disable(struct drm_bridge *bridge, drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D3); zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN, ZYNQMP_DP_TX_PHY_POWER_DOWN_ALL); - if (zynqmp_dpsub_audio_enabled(dp->dpsub)) - zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 0); zynqmp_dp_disp_disable(dp, old_bridge_state); diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.h b/drivers/gpu/drm/xlnx/zynqmp_dp.h index f077d7fbd0ad..a3257793e23a 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.h +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.h @@ -22,4 +22,11 @@ void zynqmp_dp_disable_vblank(struct zynqmp_dp *dp); int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub); void zynqmp_dp_remove(struct zynqmp_dpsub *dpsub); +void zynqmp_dp_audio_set_channels(struct zynqmp_dp *dp, + unsigned int num_channels); +void zynqmp_dp_audio_enable(struct zynqmp_dp *dp); +void zynqmp_dp_audio_disable(struct zynqmp_dp *dp); + +void zynqmp_dp_audio_write_n_m(struct zynqmp_dp *dp); + #endif /* _ZYNQMP_DP_H_ */ diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp_audio.c b/drivers/gpu/drm/xlnx/zynqmp_dp_audio.c new file mode 100644 index 000000000000..fa5f0ace6084 --- /dev/null +++ b/drivers/gpu/drm/xlnx/zynqmp_dp_audio.c @@ -0,0 +1,447 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ZynqMP DisplayPort Subsystem Driver - Audio support + * + * Copyright (C) 2015 - 2024 Xilinx, Inc. + * + * Authors: + * - Hyun Woo Kwon + * - Tomi Valkeinen + */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "zynqmp_disp_regs.h" +#include "zynqmp_dp.h" +#include "zynqmp_dpsub.h" + +#define ZYNQMP_DISP_AUD_SMPL_RATE_TO_CLK 512 +#define ZYNQMP_NUM_PCMS 2 + +struct zynqmp_dpsub_audio { + void __iomem *base; + + struct snd_soc_card card; + + const char *dai_name; + const char *link_names[ZYNQMP_NUM_PCMS]; + const char *pcm_names[ZYNQMP_NUM_PCMS]; + + struct snd_soc_dai_driver dai_driver; + struct snd_dmaengine_pcm_config pcm_configs[2]; + + struct snd_soc_dai_link links[ZYNQMP_NUM_PCMS]; + + struct { + struct snd_soc_dai_link_component cpu; + struct snd_soc_dai_link_component codec; + struct snd_soc_dai_link_component platform; + } components[ZYNQMP_NUM_PCMS]; + + /* + * Protects: + * - enabled_streams + * - volumes + * - current_rate + */ + struct mutex enable_lock; + + u32 enabled_streams; + u32 current_rate; + + u16 volumes[2]; +}; + +static const struct snd_pcm_hardware zynqmp_dp_pcm_hw = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_NO_PERIOD_WAKEUP, + + .buffer_bytes_max = 128 * 1024, + .period_bytes_min = 256, + .period_bytes_max = 1024 * 1024, + .periods_min = 2, + .periods_max = 256, +}; + +static int zynqmp_dp_startup(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, + 256); + + return 0; +} + +static const struct snd_soc_ops zynqmp_dp_ops = { + .startup = zynqmp_dp_startup, +}; + +static void zynqmp_dp_audio_write(struct zynqmp_dpsub_audio *audio, int reg, + u32 val) +{ + writel(val, audio->base + reg); +} + +static int dp_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *socdai) +{ + struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); + struct zynqmp_dpsub *dpsub = + snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0)); + struct zynqmp_dpsub_audio *audio = dpsub->audio; + int ret; + u32 sample_rate; + struct snd_aes_iec958 iec = { 0 }; + unsigned long rate; + + sample_rate = params_rate(params); + + if (sample_rate != 48000 && sample_rate != 44100) + return -EINVAL; + + guard(mutex)(&audio->enable_lock); + + if (audio->enabled_streams && audio->current_rate != sample_rate) { + dev_err(dpsub->dev, + "Can't change rate while playback enabled\n"); + return -EINVAL; + } + + if (audio->enabled_streams > 0) { + /* Nothing to do */ + audio->enabled_streams++; + return 0; + } + + audio->current_rate = sample_rate; + + /* Note: clock rate can only be changed if the clock is disabled */ + ret = clk_set_rate(dpsub->aud_clk, + sample_rate * ZYNQMP_DISP_AUD_SMPL_RATE_TO_CLK); + if (ret) { + dev_err(dpsub->dev, "can't set aud_clk to %u err:%d\n", + sample_rate * ZYNQMP_DISP_AUD_SMPL_RATE_TO_CLK, ret); + return ret; + } + + clk_prepare_enable(dpsub->aud_clk); + + rate = clk_get_rate(dpsub->aud_clk); + + /* Ignore some offset +- 10 */ + if (abs(sample_rate * ZYNQMP_DISP_AUD_SMPL_RATE_TO_CLK - rate) > 10) { + dev_err(dpsub->dev, "aud_clk offset is higher: %ld\n", + sample_rate * ZYNQMP_DISP_AUD_SMPL_RATE_TO_CLK - rate); + clk_disable_unprepare(dpsub->aud_clk); + return -EINVAL; + } + + pm_runtime_get_sync(dpsub->dev); + + zynqmp_dp_audio_write(audio, ZYNQMP_DISP_AUD_MIXER_VOLUME, + audio->volumes[0] | (audio->volumes[1] << 16)); + + /* Clear the audio soft reset register as it's an non-reset flop. */ + zynqmp_dp_audio_write(audio, ZYNQMP_DISP_AUD_SOFT_RESET, 0); + + /* Only 2 channel audio is supported now */ + zynqmp_dp_audio_set_channels(dpsub->dp, 2); + + zynqmp_dp_audio_write_n_m(dpsub->dp); + + /* Channel status */ + + if (sample_rate == 48000) + iec.status[3] = IEC958_AES3_CON_FS_48000; + else + iec.status[3] = IEC958_AES3_CON_FS_44100; + + for (unsigned int i = 0; i < AES_IEC958_STATUS_SIZE / 4; ++i) { + u32 v; + + v = (iec.status[(i * 4) + 0] << 0) | + (iec.status[(i * 4) + 1] << 8) | + (iec.status[(i * 4) + 2] << 16) | + (iec.status[(i * 4) + 3] << 24); + + zynqmp_dp_audio_write(audio, ZYNQMP_DISP_AUD_CH_STATUS(i), v); + } + + zynqmp_dp_audio_enable(dpsub->dp); + + audio->enabled_streams++; + + return 0; +} + +static int dp_dai_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *socdai) +{ + struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); + struct zynqmp_dpsub *dpsub = + snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0)); + struct zynqmp_dpsub_audio *audio = dpsub->audio; + + guard(mutex)(&audio->enable_lock); + + /* Nothing to do */ + if (audio->enabled_streams > 1) { + audio->enabled_streams--; + return 0; + } + + pm_runtime_put(dpsub->dev); + + zynqmp_dp_audio_disable(dpsub->dp); + + /* + * Reset doesn't work. If we assert reset between audio stop and start, + * the audio won't start anymore. Probably we are missing writing + * some audio related registers. A/B buf? + */ + /* + zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_SOFT_RESET, + ZYNQMP_DISP_AUD_SOFT_RESET_AUD_SRST); + */ + + clk_disable_unprepare(dpsub->aud_clk); + + audio->current_rate = 0; + audio->enabled_streams--; + + return 0; +} + +static const struct snd_soc_dai_ops zynqmp_dp_dai_ops = { + .hw_params = dp_dai_hw_params, + .hw_free = dp_dai_hw_free, +}; + +/* + * Min = 10 * log10(0x1 / 0x2000) = -39.13 + * Max = 10 * log10(0xffffff / 0x2000) = 9.03 + */ +static const DECLARE_TLV_DB_RANGE(zynqmp_dp_tlv, + 0x0, 0x0, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, -3913, 1), + 0x1, 0x2000, TLV_DB_LINEAR_ITEM(-3913, 0), + 0x2000, 0xffff, TLV_DB_LINEAR_ITEM(0, 903), +); + +static const struct snd_kcontrol_new zynqmp_dp_snd_controls[] = { + SOC_SINGLE_TLV("Input0 Playback Volume", 0, + 0, 0xffff, 0, zynqmp_dp_tlv), + SOC_SINGLE_TLV("Input1 Playback Volume", 1, + 0, 0xffff, 0, zynqmp_dp_tlv), +}; + +/* + * Note: these read & write functions only support two "registers", 0 and 1, + * for volume 0 and 1. In other words, these are not real register read/write + * functions. + * + * This is done to support caching the volume value for the case where the + * hardware is not enabled, and also to support locking as volumes 0 and 1 + * are in the same register. + */ +static unsigned int zynqmp_dp_dai_read(struct snd_soc_component *component, + unsigned int reg) +{ + struct zynqmp_dpsub *dpsub = dev_get_drvdata(component->dev); + struct zynqmp_dpsub_audio *audio = dpsub->audio; + + return audio->volumes[reg]; +} + +static int zynqmp_dp_dai_write(struct snd_soc_component *component, + unsigned int reg, unsigned int val) +{ + struct zynqmp_dpsub *dpsub = dev_get_drvdata(component->dev); + struct zynqmp_dpsub_audio *audio = dpsub->audio; + + guard(mutex)(&audio->enable_lock); + + audio->volumes[reg] = val; + + if (audio->enabled_streams) + zynqmp_dp_audio_write(audio, ZYNQMP_DISP_AUD_MIXER_VOLUME, + audio->volumes[0] | + (audio->volumes[1] << 16)); + + return 0; +} + +static const struct snd_soc_component_driver zynqmp_dp_component_driver = { + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, + .controls = zynqmp_dp_snd_controls, + .num_controls = ARRAY_SIZE(zynqmp_dp_snd_controls), + .read = zynqmp_dp_dai_read, + .write = zynqmp_dp_dai_write, +}; + +int zynqmp_audio_init(struct zynqmp_dpsub *dpsub) +{ + struct platform_device *pdev = to_platform_device(dpsub->dev); + struct device *dev = dpsub->dev; + struct zynqmp_dpsub_audio *audio; + struct snd_soc_card *card; + void *dev_data; + int ret; + + if (!dpsub->aud_clk) + return 0; + + audio = devm_kzalloc(dev, sizeof(*audio), GFP_KERNEL); + if (!audio) + return -ENOMEM; + + dpsub->audio = audio; + + mutex_init(&audio->enable_lock); + + /* 0x2000 is the zero level, no change */ + audio->volumes[0] = 0x2000; + audio->volumes[1] = 0x2000; + + audio->dai_name = devm_kasprintf(dev, GFP_KERNEL, + "%s-dai", dev_name(dev)); + + for (unsigned int i = 0; i < ZYNQMP_NUM_PCMS; ++i) { + audio->link_names[i] = devm_kasprintf(dev, GFP_KERNEL, + "%s-dp-%u", dev_name(dev), i); + audio->pcm_names[i] = devm_kasprintf(dev, GFP_KERNEL, + "%s-pcm-%u", dev_name(dev), i); + } + + audio->base = devm_platform_ioremap_resource_byname(pdev, "aud"); + if (IS_ERR(audio->base)) + return PTR_ERR(audio->base); + + /* Create CPU DAI */ + + audio->dai_driver = (struct snd_soc_dai_driver) { + .name = audio->dai_name, + .ops = &zynqmp_dp_dai_ops, + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + }; + + ret = devm_snd_soc_register_component(dev, &zynqmp_dp_component_driver, + &audio->dai_driver, 1); + if (ret) { + dev_err(dev, "Failed to register CPU DAI\n"); + return ret; + } + + /* Create PCMs */ + + for (unsigned int i = 0; i < ZYNQMP_NUM_PCMS; ++i) { + struct snd_dmaengine_pcm_config *pcm_config = + &audio->pcm_configs[i]; + + *pcm_config = (struct snd_dmaengine_pcm_config){ + .name = audio->pcm_names[i], + .pcm_hardware = &zynqmp_dp_pcm_hw, + .prealloc_buffer_size = 64 * 1024, + .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = + i == 0 ? "aud0" : "aud1", + }; + + ret = devm_snd_dmaengine_pcm_register(dev, pcm_config, 0); + if (ret) { + dev_err(dev, "Failed to register PCM %u\n", i); + return ret; + } + } + + /* Create card */ + + card = &audio->card; + card->name = "DisplayPort"; + card->long_name = "DisplayPort Monitor"; + card->driver_name = "zynqmp_dpsub"; + card->dev = dev; + card->owner = THIS_MODULE; + card->num_links = ZYNQMP_NUM_PCMS; + card->dai_link = audio->links; + + for (unsigned int i = 0; i < ZYNQMP_NUM_PCMS; ++i) { + struct snd_soc_dai_link *link = &card->dai_link[i]; + + link->ops = &zynqmp_dp_ops; + + link->name = audio->link_names[i]; + link->stream_name = audio->link_names[i]; + + link->cpus = &audio->components[i].cpu; + link->num_cpus = 1; + link->cpus[0].dai_name = audio->dai_name; + + link->codecs = &audio->components[i].codec; + link->num_codecs = 1; + link->codecs[0].name = "snd-soc-dummy"; + link->codecs[0].dai_name = "snd-soc-dummy-dai"; + + link->platforms = &audio->components[i].platform; + link->num_platforms = 1; + link->platforms[0].name = audio->pcm_names[i]; + } + + /* + * HACK: devm_snd_soc_register_card() overwrites current drvdata + * so we need to hack it back. + */ + dev_data = dev_get_drvdata(dev); + ret = devm_snd_soc_register_card(dev, card); + dev_set_drvdata(dev, dev_data); + if (ret) { + /* + * As older dtbs may not have the audio channel dmas defined, + * instead of returning an error here we'll continue and just + * mark the audio as disabled. + */ + dev_err(dev, "Failed to register sound card, disabling audio support\n"); + + devm_kfree(dev, audio); + dpsub->audio = NULL; + + return 0; + } + + return 0; +} + +void zynqmp_audio_uninit(struct zynqmp_dpsub *dpsub) +{ + struct zynqmp_dpsub_audio *audio = dpsub->audio; + + if (!audio) + return; + + if (!dpsub->aud_clk) + return; + + mutex_destroy(&audio->enable_lock); +} diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c index f5781939de9c..a72ffb31a2e8 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c @@ -56,36 +56,6 @@ static const struct dev_pm_ops zynqmp_dpsub_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(zynqmp_dpsub_suspend, zynqmp_dpsub_resume) }; -/* ----------------------------------------------------------------------------- - * DPSUB Configuration - */ - -/** - * zynqmp_dpsub_audio_enabled - If the audio is enabled - * @dpsub: DisplayPort subsystem - * - * Return if the audio is enabled depending on the audio clock. - * - * Return: true if audio is enabled, or false. - */ -bool zynqmp_dpsub_audio_enabled(struct zynqmp_dpsub *dpsub) -{ - return !!dpsub->aud_clk; -} - -/** - * zynqmp_dpsub_get_audio_clk_rate - Get the current audio clock rate - * @dpsub: DisplayPort subsystem - * - * Return: the current audio clock rate. - */ -unsigned int zynqmp_dpsub_get_audio_clk_rate(struct zynqmp_dpsub *dpsub) -{ - if (zynqmp_dpsub_audio_enabled(dpsub)) - return 0; - return clk_get_rate(dpsub->aud_clk); -} - /* ----------------------------------------------------------------------------- * Probe & Remove */ @@ -264,10 +234,17 @@ static int zynqmp_dpsub_probe(struct platform_device *pdev) goto err_disp; } + ret = zynqmp_audio_init(dpsub); + if (ret) + goto err_drm_cleanup; + dev_info(&pdev->dev, "ZynqMP DisplayPort Subsystem driver probed"); return 0; +err_drm_cleanup: + if (dpsub->drm) + zynqmp_dpsub_drm_cleanup(dpsub); err_disp: drm_bridge_remove(dpsub->bridge); zynqmp_disp_remove(dpsub); @@ -287,6 +264,8 @@ static void zynqmp_dpsub_remove(struct platform_device *pdev) { struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev); + zynqmp_audio_uninit(dpsub); + if (dpsub->drm) zynqmp_dpsub_drm_cleanup(dpsub); diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.h b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h index b18554467e9c..49875529c2a4 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.h +++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h @@ -12,6 +12,8 @@ #ifndef _ZYNQMP_DPSUB_H_ #define _ZYNQMP_DPSUB_H_ +#include + struct clk; struct device; struct drm_bridge; @@ -39,6 +41,8 @@ enum zynqmp_dpsub_format { ZYNQMP_DPSUB_FORMAT_YONLY, }; +struct zynqmp_dpsub_audio; + /** * struct zynqmp_dpsub - ZynqMP DisplayPort Subsystem * @dev: The physical device @@ -77,10 +81,17 @@ struct zynqmp_dpsub { struct zynqmp_dp *dp; unsigned int dma_align; + + struct zynqmp_dpsub_audio *audio; }; -bool zynqmp_dpsub_audio_enabled(struct zynqmp_dpsub *dpsub); -unsigned int zynqmp_dpsub_get_audio_clk_rate(struct zynqmp_dpsub *dpsub); +#ifdef CONFIG_DRM_ZYNQMP_DPSUB_AUDIO +int zynqmp_audio_init(struct zynqmp_dpsub *dpsub); +void zynqmp_audio_uninit(struct zynqmp_dpsub *dpsub); +#else +static inline int zynqmp_audio_init(struct zynqmp_dpsub *dpsub) { return 0; } +static inline void zynqmp_audio_uninit(struct zynqmp_dpsub *dpsub) { } +#endif void zynqmp_dpsub_release(struct zynqmp_dpsub *dpsub);