From 3b7c1237a72a970daca99a6dc30f980f8bbaa34c Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Mon, 25 Mar 2019 15:18:24 +0100 Subject: [PATCH] drm/meson: Add G12A support for the DW-HDMI Glue The Amlogic G12A embeds the same Synopsys DW-HDMI Controller, but with : - a "backport" of the HDR signaling registers from more recent DW-HDMI controllers, this will need a tweak since it's not normally present on this version of the DW-HDMI controller - A direct mapping of TOP and DW-HDMI registers instead of an internal bus accessed using read/write registers - Support for RX-SENSE, but not yet implemented - Support for HDMI 2.1 Dynamic HDR, but not yet implemented - Different registers mapping for the HDMI PHY setup This patchs adds support for these changes while providing exact same support as the previous GXBB, GXL & GXM SoCs. Signed-off-by: Neil Armstrong Tested-by: Jerome Brunet Reviewed-by: Jerome Brunet Link: https://patchwork.freedesktop.org/patch/msgid/20190325141824.21259-12-narmstrong@baylibre.com --- drivers/gpu/drm/meson/meson_dw_hdmi.c | 163 +++++++++++++++++++++++++++------- drivers/gpu/drm/meson/meson_dw_hdmi.h | 32 +++++-- 2 files changed, 157 insertions(+), 38 deletions(-) diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c index e28814f..2a860d1 100644 --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -105,6 +106,7 @@ #define HDMITX_TOP_ADDR_REG 0x0 #define HDMITX_TOP_DATA_REG 0x4 #define HDMITX_TOP_CTRL_REG 0x8 +#define HDMITX_TOP_G12A_OFFSET 0x8000 /* Controller Communication Channel */ #define HDMITX_DWC_ADDR_REG 0x10 @@ -118,6 +120,8 @@ #define HHI_HDMI_PHY_CNTL1 0x3a4 /* 0xe9 */ #define HHI_HDMI_PHY_CNTL2 0x3a8 /* 0xea */ #define HHI_HDMI_PHY_CNTL3 0x3ac /* 0xeb */ +#define HHI_HDMI_PHY_CNTL4 0x3b0 /* 0xec */ +#define HHI_HDMI_PHY_CNTL5 0x3b4 /* 0xed */ static DEFINE_SPINLOCK(reg_lock); @@ -127,12 +131,26 @@ enum meson_venc_source { MESON_VENC_SOURCE_ENCP = 2, }; +struct meson_dw_hdmi; + +struct meson_dw_hdmi_data { + unsigned int (*top_read)(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr); + void (*top_write)(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr, unsigned int data); + unsigned int (*dwc_read)(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr); + void (*dwc_write)(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr, unsigned int data); +}; + struct meson_dw_hdmi { struct drm_encoder encoder; struct dw_hdmi_plat_data dw_plat_data; struct meson_drm *priv; struct device *dev; void __iomem *hdmitx; + const struct meson_dw_hdmi_data *data; struct reset_control *hdmitx_apb; struct reset_control *hdmitx_ctrl; struct reset_control *hdmitx_phy; @@ -174,6 +192,12 @@ static unsigned int dw_hdmi_top_read(struct meson_dw_hdmi *dw_hdmi, return data; } +static unsigned int dw_hdmi_g12a_top_read(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr) +{ + return readl(dw_hdmi->hdmitx + HDMITX_TOP_G12A_OFFSET + (addr << 2)); +} + static inline void dw_hdmi_top_write(struct meson_dw_hdmi *dw_hdmi, unsigned int addr, unsigned int data) { @@ -191,18 +215,24 @@ static inline void dw_hdmi_top_write(struct meson_dw_hdmi *dw_hdmi, spin_unlock_irqrestore(®_lock, flags); } +static inline void dw_hdmi_g12a_top_write(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr, unsigned int data) +{ + writel(data, dw_hdmi->hdmitx + HDMITX_TOP_G12A_OFFSET + (addr << 2)); +} + /* Helper to change specific bits in PHY registers */ static inline void dw_hdmi_top_write_bits(struct meson_dw_hdmi *dw_hdmi, unsigned int addr, unsigned int mask, unsigned int val) { - unsigned int data = dw_hdmi_top_read(dw_hdmi, addr); + unsigned int data = dw_hdmi->data->top_read(dw_hdmi, addr); data &= ~mask; data |= val; - dw_hdmi_top_write(dw_hdmi, addr, data); + dw_hdmi->data->top_write(dw_hdmi, addr, data); } static unsigned int dw_hdmi_dwc_read(struct meson_dw_hdmi *dw_hdmi, @@ -226,6 +256,12 @@ static unsigned int dw_hdmi_dwc_read(struct meson_dw_hdmi *dw_hdmi, return data; } +static unsigned int dw_hdmi_g12a_dwc_read(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr) +{ + return readb(dw_hdmi->hdmitx + addr); +} + static inline void dw_hdmi_dwc_write(struct meson_dw_hdmi *dw_hdmi, unsigned int addr, unsigned int data) { @@ -243,18 +279,24 @@ static inline void dw_hdmi_dwc_write(struct meson_dw_hdmi *dw_hdmi, spin_unlock_irqrestore(®_lock, flags); } +static inline void dw_hdmi_g12a_dwc_write(struct meson_dw_hdmi *dw_hdmi, + unsigned int addr, unsigned int data) +{ + writeb(data, dw_hdmi->hdmitx + addr); +} + /* Helper to change specific bits in controller registers */ static inline void dw_hdmi_dwc_write_bits(struct meson_dw_hdmi *dw_hdmi, unsigned int addr, unsigned int mask, unsigned int val) { - unsigned int data = dw_hdmi_dwc_read(dw_hdmi, addr); + unsigned int data = dw_hdmi->data->dwc_read(dw_hdmi, addr); data &= ~mask; data |= val; - dw_hdmi_dwc_write(dw_hdmi, addr, data); + dw_hdmi->data->dwc_write(dw_hdmi, addr, data); } /* Bridge */ @@ -300,6 +342,24 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi, regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33632122); regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2000115b); } + } else if (dw_hdmi_is_compatible(dw_hdmi, + "amlogic,meson-g12a-dw-hdmi")) { + if (pixel_clock >= 371250) { + /* 5.94Gbps, 3.7125Gbps */ + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x37eb65c4); + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b); + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x0000080b); + } else if (pixel_clock >= 297000) { + /* 2.97Gbps */ + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33eb6262); + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b); + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x00000003); + } else { + /* 1.485Gbps, and below */ + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33eb4242); + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b); + regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x00000003); + } } } @@ -375,7 +435,7 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data, regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0); /* Bring out of reset */ - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_SW_RESET, 0); + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_SW_RESET, 0); /* Enable internal pixclk, tmds_clk, spdif_clk, i2s_clk, cecclk */ dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL, @@ -384,24 +444,25 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data, 0x3 << 4, 0x3 << 4); /* Enable normal output to PHY */ - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12)); + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12)); /* TMDS pattern setup (TOFIX Handle the YUV420 case) */ if (mode->clock > 340000) { - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01, 0); - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23, + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01, + 0); + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23, 0x03ff03ff); } else { - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01, + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01, 0x001f001f); - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23, + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23, 0x001f001f); } /* Load TMDS pattern */ - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x1); + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x1); msleep(20); - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x2); + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x2); /* Setup PHY parameters */ meson_hdmi_phy_setup_mode(dw_hdmi, mode); @@ -412,7 +473,8 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data, /* BIT_INVERT */ if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") || - dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi")) + dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi") || + dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-g12a-dw-hdmi")) regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, BIT(17), 0); else @@ -480,7 +542,7 @@ static enum drm_connector_status dw_hdmi_read_hpd(struct dw_hdmi *hdmi, { struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data; - return !!dw_hdmi_top_read(dw_hdmi, HDMITX_TOP_STAT0) ? + return !!dw_hdmi->data->top_read(dw_hdmi, HDMITX_TOP_STAT0) ? connector_status_connected : connector_status_disconnected; } @@ -490,11 +552,11 @@ static void dw_hdmi_setup_hpd(struct dw_hdmi *hdmi, struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data; /* Setup HPD Filter */ - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_HPD_FILTER, + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_HPD_FILTER, (0xa << 12) | 0xa0); /* Clear interrupts */ - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL); /* Unmask interrupts */ @@ -515,8 +577,8 @@ static irqreturn_t dw_hdmi_top_irq(int irq, void *dev_id) struct meson_dw_hdmi *dw_hdmi = dev_id; u32 stat; - stat = dw_hdmi_top_read(dw_hdmi, HDMITX_TOP_INTR_STAT); - dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, stat); + stat = dw_hdmi->data->top_read(dw_hdmi, HDMITX_TOP_INTR_STAT); + dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, stat); /* HPD Events, handle in the threaded interrupt handler */ if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) { @@ -685,7 +747,9 @@ static const struct drm_encoder_helper_funcs static int meson_dw_hdmi_reg_read(void *context, unsigned int reg, unsigned int *result) { - *result = dw_hdmi_dwc_read(context, reg); + struct meson_dw_hdmi *dw_hdmi = context; + + *result = dw_hdmi->data->dwc_read(dw_hdmi, reg); return 0; @@ -694,7 +758,9 @@ static int meson_dw_hdmi_reg_read(void *context, unsigned int reg, static int meson_dw_hdmi_reg_write(void *context, unsigned int reg, unsigned int val) { - dw_hdmi_dwc_write(context, reg, val); + struct meson_dw_hdmi *dw_hdmi = context; + + dw_hdmi->data->dwc_write(dw_hdmi, reg, val); return 0; } @@ -708,6 +774,20 @@ static const struct regmap_config meson_dw_hdmi_regmap_config = { .fast_io = true, }; +static const struct meson_dw_hdmi_data meson_dw_hdmi_gx_data = { + .top_read = dw_hdmi_top_read, + .top_write = dw_hdmi_top_write, + .dwc_read = dw_hdmi_dwc_read, + .dwc_write = dw_hdmi_dwc_write, +}; + +static const struct meson_dw_hdmi_data meson_dw_hdmi_g12a_data = { + .top_read = dw_hdmi_g12a_top_read, + .top_write = dw_hdmi_g12a_top_write, + .dwc_read = dw_hdmi_g12a_dwc_read, + .dwc_write = dw_hdmi_g12a_dwc_write, +}; + static bool meson_hdmi_connector_is_available(struct device *dev) { struct device_node *ep, *remote; @@ -734,6 +814,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); + const struct meson_dw_hdmi_data *match; struct meson_dw_hdmi *meson_dw_hdmi; struct drm_device *drm = data; struct meson_drm *priv = drm->dev_private; @@ -750,6 +831,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, return -ENODEV; } + match = of_device_get_match_data(&pdev->dev); + if (!match) { + dev_err(&pdev->dev, "failed to get match data\n"); + return -ENODEV; + } + meson_dw_hdmi = devm_kzalloc(dev, sizeof(*meson_dw_hdmi), GFP_KERNEL); if (!meson_dw_hdmi) @@ -757,6 +844,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, meson_dw_hdmi->priv = priv; meson_dw_hdmi->dev = dev; + meson_dw_hdmi->data = match; dw_plat_data = &meson_dw_hdmi->dw_plat_data; encoder = &meson_dw_hdmi->encoder; @@ -857,24 +945,28 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, reset_control_reset(meson_dw_hdmi->hdmitx_phy); /* Enable APB3 fail on error */ - writel_bits_relaxed(BIT(15), BIT(15), - meson_dw_hdmi->hdmitx + HDMITX_TOP_CTRL_REG); - writel_bits_relaxed(BIT(15), BIT(15), - meson_dw_hdmi->hdmitx + HDMITX_DWC_CTRL_REG); + if (!meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu")) { + writel_bits_relaxed(BIT(15), BIT(15), + meson_dw_hdmi->hdmitx + HDMITX_TOP_CTRL_REG); + writel_bits_relaxed(BIT(15), BIT(15), + meson_dw_hdmi->hdmitx + HDMITX_DWC_CTRL_REG); + } /* Bring out of reset */ - dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_SW_RESET, 0); + meson_dw_hdmi->data->top_write(meson_dw_hdmi, + HDMITX_TOP_SW_RESET, 0); msleep(20); - dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_CLK_CNTL, 0xff); + meson_dw_hdmi->data->top_write(meson_dw_hdmi, + HDMITX_TOP_CLK_CNTL, 0xff); /* Enable HDMI-TX Interrupt */ - dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, - HDMITX_TOP_INTR_CORE); + meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, + HDMITX_TOP_INTR_CORE); - dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_INTR_MASKN, - HDMITX_TOP_INTR_CORE); + meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_MASKN, + HDMITX_TOP_INTR_CORE); /* Bridge / Connector */ @@ -923,9 +1015,14 @@ static int meson_dw_hdmi_remove(struct platform_device *pdev) } static const struct of_device_id meson_dw_hdmi_of_table[] = { - { .compatible = "amlogic,meson-gxbb-dw-hdmi" }, - { .compatible = "amlogic,meson-gxl-dw-hdmi" }, - { .compatible = "amlogic,meson-gxm-dw-hdmi" }, + { .compatible = "amlogic,meson-gxbb-dw-hdmi", + .data = &meson_dw_hdmi_gx_data }, + { .compatible = "amlogic,meson-gxl-dw-hdmi", + .data = &meson_dw_hdmi_gx_data }, + { .compatible = "amlogic,meson-gxm-dw-hdmi", + .data = &meson_dw_hdmi_gx_data }, + { .compatible = "amlogic,meson-g12a-dw-hdmi", + .data = &meson_dw_hdmi_g12a_data }, { } }; MODULE_DEVICE_TABLE(of, meson_dw_hdmi_of_table); diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.h b/drivers/gpu/drm/meson/meson_dw_hdmi.h index 0b81183..03e2f0c 100644 --- a/drivers/gpu/drm/meson/meson_dw_hdmi.h +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.h @@ -21,9 +21,12 @@ #define __MESON_DW_HDMI_H /* - * Bit 7 RW Reserved. Default 1. - * Bit 6 RW Reserved. Default 1. - * Bit 5 RW Reserved. Default 1. + * Bit 15-10: RW Reserved. Default 1 starting from G12A + * Bit 9 RW sw_reset_i2c starting from G12A + * Bit 8 RW sw_reset_axiarb starting from G12A + * Bit 7 RW Reserved. Default 1, sw_reset_emp starting from G12A + * Bit 6 RW Reserved. Default 1, sw_reset_flt starting from G12A + * Bit 5 RW Reserved. Default 1, sw_reset_hdcp22 starting from G12A * Bit 4 RW sw_reset_phyif: PHY interface. 1=Apply reset; 0=Release from reset. * Default 1. * Bit 3 RW sw_reset_intr: interrupt module. 1=Apply reset; @@ -39,12 +42,16 @@ #define HDMITX_TOP_SW_RESET (0x000) /* + * Bit 31 RW free_clk_en: 0=Enable clock gating for power saving; 1= Disable * Bit 12 RW i2s_ws_inv:1=Invert i2s_ws; 0=No invert. Default 0. * Bit 11 RW i2s_clk_inv: 1=Invert i2s_clk; 0=No invert. Default 0. * Bit 10 RW spdif_clk_inv: 1=Invert spdif_clk; 0=No invert. Default 0. * Bit 9 RW tmds_clk_inv: 1=Invert tmds_clk; 0=No invert. Default 0. * Bit 8 RW pixel_clk_inv: 1=Invert pixel_clk; 0=No invert. Default 0. - * Bit 4 RW cec_clk_en: 1=enable cec_clk; 0=disable. Default 0. + * Bit 7 RW hdcp22_skpclk_en: starting from G12A, 1=enable; 0=disable + * Bit 6 RW hdcp22_esmclk_en: starting from G12A, 1=enable; 0=disable + * Bit 5 RW hdcp22_tmdsclk_en: starting from G12A, 1=enable; 0=disable + * Bit 4 RW cec_clk_en: 1=enable cec_clk; 0=disable. Default 0. Reserved for G12A * Bit 3 RW i2s_clk_en: 1=enable i2s_clk; 0=disable. Default 0. * Bit 2 RW spdif_clk_en: 1=enable spdif_clk; 0=disable. Default 0. * Bit 1 RW tmds_clk_en: 1=enable tmds_clk; 0=disable. Default 0. @@ -53,6 +60,8 @@ #define HDMITX_TOP_CLK_CNTL (0x001) /* + * Bit 31:28 RW rxsense_glitch_width: starting from G12A + * Bit 27:16 RW rxsense_valid_width: starting from G12A * Bit 11: 0 RW hpd_valid_width: filter out width <= M*1024. Default 0. * Bit 15:12 RW hpd_glitch_width: filter out glitch <= N. Default 0. */ @@ -61,6 +70,9 @@ /* * intr_maskn: MASK_N, one bit per interrupt source. * 1=Enable interrupt source; 0=Disable interrupt source. Default 0. + * [ 7] rxsense_fall starting from G12A + * [ 6] rxsense_rise starting from G12A + * [ 5] err_i2c_timeout starting from G12A * [ 4] hdcp22_rndnum_err * [ 3] nonce_rfrsh_rise * [ 2] hpd_fall_intr @@ -73,6 +85,9 @@ * Bit 30: 0 RW intr_stat: For each bit, write 1 to manually set the interrupt * bit, read back the interrupt status. * Bit 31 R IP interrupt status + * Bit 7 RW rxsense_fall starting from G12A + * Bit 6 RW rxsense_rise starting from G12A + * Bit 5 RW err_i2c_timeout starting from G12A * Bit 2 RW hpd_fall * Bit 1 RW hpd_rise * Bit 0 RW IP interrupt @@ -80,6 +95,9 @@ #define HDMITX_TOP_INTR_STAT (0x004) /* + * [7] rxsense_fall starting from G12A + * [6] rxsense_rise starting from G12A + * [5] err_i2c_timeout starting from G12A * [4] hdcp22_rndnum_err * [3] nonce_rfrsh_rise * [2] hpd_fall @@ -91,6 +109,8 @@ #define HDMITX_TOP_INTR_CORE BIT(0) #define HDMITX_TOP_INTR_HPD_RISE BIT(1) #define HDMITX_TOP_INTR_HPD_FALL BIT(2) +#define HDMITX_TOP_INTR_RXSENSE_RISE BIT(6) +#define HDMITX_TOP_INTR_RXSENSE_FALL BIT(7) /* Bit 14:12 RW tmds_sel: 3'b000=Output zero; 3'b001=Output normal TMDS data; * 3'b010=Output PRBS data; 3'b100=Output shift pattern. Default 0. @@ -140,7 +160,9 @@ */ #define HDMITX_TOP_REVOCMEM_STAT (0x00D) -/* Bit 0 R filtered HPD status. */ +/* Bit 1 R filtered RxSense status + * Bit 0 R filtered HPD status. + */ #define HDMITX_TOP_STAT0 (0x00E) #endif /* __MESON_DW_HDMI_H */ -- 2.7.4