From patchwork Thu Dec 29 11:14:30 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Guo X-Patchwork-Id: 9491149 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 976A860838 for ; Thu, 29 Dec 2016 11:20:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 71A712623C for ; Thu, 29 Dec 2016 11:20:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 51E4D2624D; Thu, 29 Dec 2016 11:20:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8E9412623C for ; Thu, 29 Dec 2016 11:20:03 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cMYh8-0008Md-GE; Thu, 29 Dec 2016 11:16:26 +0000 Received: from mail.kernel.org ([198.145.29.136]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cMYh1-0008Kg-Nk for linux-arm-kernel@lists.infradead.org; Thu, 29 Dec 2016 11:16:20 +0000 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 396142051F; Thu, 29 Dec 2016 11:15:58 +0000 (UTC) Received: from localhost.localdomain (li411-102.members.linode.com [106.187.91.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 64C8620434; Thu, 29 Dec 2016 11:15:51 +0000 (UTC) From: Shawn Guo To: dri-devel@lists.freedesktop.org Subject: [PATCH v2] drm: zte: support hdmi audio through spdif Date: Thu, 29 Dec 2016 19:14:30 +0800 Message-Id: <1483010070-9063-1-git-send-email-shawnguo@kernel.org> X-Mailer: git-send-email 1.9.1 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161229_031619_846015_9A5FDE4A X-CRM114-Status: GOOD ( 20.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Daniel Vetter , Baoyou Xie , Sean Paul , Jun Nie , Shawn Guo , Shawn Guo , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Shawn Guo It enables HDMI audio support through SPDIF interface based on generic hdmi-audio-codec driver. The HDMI hardware supports more audio interfaces than SPDIF, like I2S, which may be added later. Signed-off-by: Shawn Guo --- Changes for v2: - Distll the function zx_hdmi_audio_get_n() per Sean's suggestion and make it inline. - Fix the operator typo on N_SVAL2 register write. drivers/gpu/drm/zte/Kconfig | 1 + drivers/gpu/drm/zte/zx_hdmi.c | 148 +++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/zte/zx_hdmi_regs.h | 14 ++++ drivers/gpu/drm/zte/zx_vou.c | 9 +++ drivers/gpu/drm/zte/zx_vou.h | 10 +++ drivers/gpu/drm/zte/zx_vou_regs.h | 2 + 6 files changed, 184 insertions(+) diff --git a/drivers/gpu/drm/zte/Kconfig b/drivers/gpu/drm/zte/Kconfig index 4065b2840f1c..ed6de4b10c74 100644 --- a/drivers/gpu/drm/zte/Kconfig +++ b/drivers/gpu/drm/zte/Kconfig @@ -4,5 +4,6 @@ config DRM_ZTE select DRM_KMS_CMA_HELPER select DRM_KMS_FB_HELPER select DRM_KMS_HELPER + select SND_SOC_HDMI_CODEC if SND_SOC help Choose this option to enable DRM on ZTE ZX SoCs. diff --git a/drivers/gpu/drm/zte/zx_hdmi.c b/drivers/gpu/drm/zte/zx_hdmi.c index 6bf6c364811e..c20121846073 100644 --- a/drivers/gpu/drm/zte/zx_hdmi.c +++ b/drivers/gpu/drm/zte/zx_hdmi.c @@ -25,6 +25,8 @@ #include #include +#include + #include "zx_hdmi_regs.h" #include "zx_vou.h" @@ -49,6 +51,7 @@ struct zx_hdmi { bool sink_is_hdmi; bool sink_has_audio; const struct vou_inf *inf; + struct platform_device *audio_pdev; }; #define to_zx_hdmi(x) container_of(x, struct zx_hdmi, x) @@ -366,6 +369,142 @@ static irqreturn_t zx_hdmi_irq_handler(int irq, void *dev_id) return IRQ_NONE; } +static int zx_hdmi_audio_startup(struct device *dev, void *data) +{ + struct zx_hdmi *hdmi = dev_get_drvdata(dev); + struct drm_encoder *encoder = &hdmi->encoder; + + vou_inf_hdmi_audio_sel(encoder->crtc, VOU_HDMI_AUD_SPDIF); + + return 0; +} + +static void zx_hdmi_audio_shutdown(struct device *dev, void *data) +{ + struct zx_hdmi *hdmi = dev_get_drvdata(dev); + + /* Disable audio input */ + hdmi_writeb_mask(hdmi, AUD_EN, AUD_IN_EN, 0); +} + +static inline int zx_hdmi_audio_get_n(unsigned int fs) +{ + unsigned int n; + + if (fs && (fs % 44100) == 0) + n = 6272 * (fs / 44100); + else + n = fs * 128 / 1000; + + return n; +} + +static int zx_hdmi_audio_hw_params(struct device *dev, + void *data, + struct hdmi_codec_daifmt *daifmt, + struct hdmi_codec_params *params) +{ + struct zx_hdmi *hdmi = dev_get_drvdata(dev); + struct hdmi_audio_infoframe *cea = ¶ms->cea; + union hdmi_infoframe frame; + int n; + + /* We only support spdif for now */ + if (daifmt->fmt != HDMI_SPDIF) { + DRM_DEV_ERROR(hdmi->dev, "invalid daifmt %d\n", daifmt->fmt); + return -EINVAL; + } + + switch (params->sample_width) { + case 16: + hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK, + SPDIF_SAMPLE_SIZE_16BIT); + break; + case 20: + hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK, + SPDIF_SAMPLE_SIZE_20BIT); + break; + case 24: + hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK, + SPDIF_SAMPLE_SIZE_24BIT); + break; + default: + DRM_DEV_ERROR(hdmi->dev, "invalid sample width %d\n", + params->sample_width); + return -EINVAL; + } + + /* CTS is calculated by hardware, and we only need to take care of N */ + n = zx_hdmi_audio_get_n(params->sample_rate); + hdmi_writeb(hdmi, N_SVAL1, n & 0xff); + hdmi_writeb(hdmi, N_SVAL2, (n >> 8) & 0xff); + hdmi_writeb(hdmi, N_SVAL3, (n >> 16) & 0xf); + + /* Enable spdif mode */ + hdmi_writeb_mask(hdmi, AUD_MODE, SPDIF_EN, SPDIF_EN); + + /* Enable audio input */ + hdmi_writeb_mask(hdmi, AUD_EN, AUD_IN_EN, AUD_IN_EN); + + memcpy(&frame.audio, cea, sizeof(*cea)); + + return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_AUDIO); +} + +static int zx_hdmi_audio_digital_mute(struct device *dev, void *data, + bool enable) +{ + struct zx_hdmi *hdmi = dev_get_drvdata(dev); + + if (enable) + hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, TPI_AUD_MUTE, + TPI_AUD_MUTE); + else + hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, TPI_AUD_MUTE, 0); + + return 0; +} + +static int zx_hdmi_audio_get_eld(struct device *dev, void *data, + uint8_t *buf, size_t len) +{ + struct zx_hdmi *hdmi = dev_get_drvdata(dev); + struct drm_connector *connector = &hdmi->connector; + + memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + + return 0; +} + +static const struct hdmi_codec_ops zx_hdmi_codec_ops = { + .audio_startup = zx_hdmi_audio_startup, + .hw_params = zx_hdmi_audio_hw_params, + .audio_shutdown = zx_hdmi_audio_shutdown, + .digital_mute = zx_hdmi_audio_digital_mute, + .get_eld = zx_hdmi_audio_get_eld, +}; + +static struct hdmi_codec_pdata zx_hdmi_codec_pdata = { + .ops = &zx_hdmi_codec_ops, + .spdif = 1, +}; + +static int zx_hdmi_audio_register(struct zx_hdmi *hdmi) +{ + struct platform_device *pdev; + + pdev = platform_device_register_data(hdmi->dev, HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, + &zx_hdmi_codec_pdata, + sizeof(zx_hdmi_codec_pdata)); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + hdmi->audio_pdev = pdev; + + return 0; +} + static int zx_hdmi_i2c_read(struct zx_hdmi *hdmi, struct i2c_msg *msg) { int len = msg->len; @@ -566,6 +705,12 @@ static int zx_hdmi_bind(struct device *dev, struct device *master, void *data) return ret; } + ret = zx_hdmi_audio_register(hdmi); + if (ret) { + DRM_DEV_ERROR(dev, "failed to register audio: %d\n", ret); + return ret; + } + ret = zx_hdmi_register(drm, hdmi); if (ret) { DRM_DEV_ERROR(dev, "failed to register hdmi: %d\n", ret); @@ -590,6 +735,9 @@ static void zx_hdmi_unbind(struct device *dev, struct device *master, hdmi->connector.funcs->destroy(&hdmi->connector); hdmi->encoder.funcs->destroy(&hdmi->encoder); + + if (hdmi->audio_pdev) + platform_device_unregister(hdmi->audio_pdev); } static const struct component_ops zx_hdmi_component_ops = { diff --git a/drivers/gpu/drm/zte/zx_hdmi_regs.h b/drivers/gpu/drm/zte/zx_hdmi_regs.h index de911f66b658..c6d5d8211725 100644 --- a/drivers/gpu/drm/zte/zx_hdmi_regs.h +++ b/drivers/gpu/drm/zte/zx_hdmi_regs.h @@ -52,5 +52,19 @@ #define TPI_INFO_TRANS_RPT BIT(6) #define TPI_DDC_MASTER_EN 0x06f8 #define HW_DDC_MASTER BIT(7) +#define N_SVAL1 0xa03 +#define N_SVAL2 0xa04 +#define N_SVAL3 0xa05 +#define AUD_EN 0xa13 +#define AUD_IN_EN BIT(0) +#define AUD_MODE 0xa14 +#define SPDIF_EN BIT(1) +#define TPI_AUD_CONFIG 0xa62 +#define SPDIF_SAMPLE_SIZE_SHIFT 6 +#define SPDIF_SAMPLE_SIZE_MASK (0x3 << SPDIF_SAMPLE_SIZE_SHIFT) +#define SPDIF_SAMPLE_SIZE_16BIT (0x1 << SPDIF_SAMPLE_SIZE_SHIFT) +#define SPDIF_SAMPLE_SIZE_20BIT (0x2 << SPDIF_SAMPLE_SIZE_SHIFT) +#define SPDIF_SAMPLE_SIZE_24BIT (0x3 << SPDIF_SAMPLE_SIZE_SHIFT) +#define TPI_AUD_MUTE BIT(4) #endif /* __ZX_HDMI_REGS_H__ */ diff --git a/drivers/gpu/drm/zte/zx_vou.c b/drivers/gpu/drm/zte/zx_vou.c index 73fe15c17c32..f89ad7f72fdb 100644 --- a/drivers/gpu/drm/zte/zx_vou.c +++ b/drivers/gpu/drm/zte/zx_vou.c @@ -119,6 +119,15 @@ static inline struct zx_vou_hw *crtc_to_vou(struct drm_crtc *crtc) return zcrtc->vou; } +void vou_inf_hdmi_audio_sel(struct drm_crtc *crtc, + enum vou_inf_hdmi_audio aud) +{ + struct zx_crtc *zcrtc = to_zx_crtc(crtc); + struct zx_vou_hw *vou = zcrtc->vou; + + zx_writel_mask(vou->vouctl + VOU_INF_HDMI_CTRL, VOU_HDMI_AUD_MASK, aud); +} + void vou_inf_enable(const struct vou_inf *inf, struct drm_crtc *crtc) { struct zx_crtc *zcrtc = to_zx_crtc(crtc); diff --git a/drivers/gpu/drm/zte/zx_vou.h b/drivers/gpu/drm/zte/zx_vou.h index 349e06cd86f4..e571b888a3ca 100644 --- a/drivers/gpu/drm/zte/zx_vou.h +++ b/drivers/gpu/drm/zte/zx_vou.h @@ -30,6 +30,14 @@ enum vou_inf_data_sel { VOU_RGB_666 = 3, }; +enum vou_inf_hdmi_audio { + VOU_HDMI_AUD_SPDIF = BIT(0), + VOU_HDMI_AUD_I2S = BIT(1), + VOU_HDMI_AUD_DSD = BIT(2), + VOU_HDMI_AUD_HBR = BIT(3), + VOU_HDMI_AUD_PARALLEL = BIT(4), +}; + struct vou_inf { enum vou_inf_id id; enum vou_inf_data_sel data_sel; @@ -37,6 +45,8 @@ struct vou_inf { u32 clocks_sel_bits; }; +void vou_inf_hdmi_audio_sel(struct drm_crtc *crtc, + enum vou_inf_hdmi_audio aud); void vou_inf_enable(const struct vou_inf *inf, struct drm_crtc *crtc); void vou_inf_disable(const struct vou_inf *inf, struct drm_crtc *crtc); diff --git a/drivers/gpu/drm/zte/zx_vou_regs.h b/drivers/gpu/drm/zte/zx_vou_regs.h index f44e7a4ae441..15b73cd3a612 100644 --- a/drivers/gpu/drm/zte/zx_vou_regs.h +++ b/drivers/gpu/drm/zte/zx_vou_regs.h @@ -150,6 +150,8 @@ #define VOU_CLK_GL0_SEL BIT(4) #define VOU_CLK_REQEN 0x20 #define VOU_CLK_EN 0x24 +#define VOU_INF_HDMI_CTRL 0x30 +#define VOU_HDMI_AUD_MASK 0x1f /* OTFPPU_CTRL registers */ #define OTFPPU_RSZ_DATA_SOURCE 0x04