[PATCH 3/3] drm: bridge: add it66121 driver
This commit is a simple driver for bridge HMDI it66121. The input format is RBG and there is no color conversion. Audio, HDCP and CEC are not supported yet. Signed-off-by: Phong LE --- drivers/gpu/drm/bridge/Kconfig | 8 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/ite-it66121.c | 983 +++ 3 files changed, 992 insertions(+) create mode 100644 drivers/gpu/drm/bridge/ite-it66121.c diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 0b9ca5862455..a6f99861a4d1 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -35,6 +35,14 @@ config DRM_DUMB_VGA_DAC Support for non-programmable RGB to VGA DAC bridges, such as ADI ADV7123, TI THS8134 and THS8135 or passive resistor ladder DACs. +config DRM_ITE_IT66121 + tristate "ITE IT66121 HDMI bridge" + depends on OF + select DRM_KMS_HELPER + select REGMAP_I2C + help + Support for ITE IT66121 HDMI bridge. + config DRM_LVDS_CODEC tristate "Transparent LVDS encoders and decoders support" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index cd16ce830270..79d6f8df6e27 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o +obj-$(CONFIG_DRM_ITE_IT66121) += ite-it66121.o obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o obj-$(CONFIG_DRM_MEGACHIPS_STDP_GE_B850V3_FW) += megachips-stdp-ge-b850v3-fw.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c new file mode 100644 index ..0e26a798a2dd --- /dev/null +++ b/drivers/gpu/drm/bridge/ite-it66121.c @@ -0,0 +1,983 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 BayLibre, SAS + * Author: Phong LE + * Copyright (C) 2018-2019, Artem Mygaiev + * Copyright (C) 2017, Fresco Logic, Incorporated. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#define IT66121_MASTER_SEL_REG 0x10 +#define IT66121_MASTER_SEL_HOSTBIT(0) + +#define IT66121_AFE_DRV_REG0x61 +#define IT66121_AFE_DRV_RSTBIT(4) +#define IT66121_AFE_DRV_PWDBIT(5) + +#define IT66121_INPUT_MODE_REG 0x70 +#define IT66121_INPUT_MODE_RGB (0 << 6) +#define IT66121_INPUT_MODE_YUV422 BIT(6) +#define IT66121_INPUT_MODE_YUV444 (2 << 6) +#define IT66121_INPUT_MODE_CCIR656 BIT(4) +#define IT66121_INPUT_MODE_SYNCEMB BIT(3) +#define IT66121_INPUT_MODE_DDR BIT(2) + +#define IT66121_INPUT_CSC_REG 0x72 +#define IT66121_INPUT_CSC_ENDITHER BIT(7) +#define IT66121_INPUT_CSC_ENUDFILTER BIT(6) +#define IT66121_INPUT_CSC_DNFREE_GOBIT(5) +#define IT66121_INPUT_CSC_RGB_TO_YUV 0x02 +#define IT66121_INPUT_CSC_YUV_TO_RGB 0x03 +#define IT66121_INPUT_CSC_NO_CONV 0x00 + +#define IT66121_AFE_XP_REG 0x62 +#define IT66121_AFE_XP_GAINBIT BIT(7) +#define IT66121_AFE_XP_PWDPLL BIT(6) +#define IT66121_AFE_XP_ENI BIT(5) +#define IT66121_AFE_XP_ENO BIT(4) +#define IT66121_AFE_XP_RESETB BIT(3) +#define IT66121_AFE_XP_PWDIBIT(2) + +#define IT66121_AFE_IP_REG 0x64 +#define IT66121_AFE_IP_GAINBIT BIT(7) +#define IT66121_AFE_IP_PWDPLL BIT(6) +#define IT66121_AFE_IP_CKSEL_05(0 << 4) +#define IT66121_AFE_IP_CKSEL_1 BIT(4) +#define IT66121_AFE_IP_CKSEL_2 (2 << 4) +#define IT66121_AFE_IP_CKSEL_2OR4 (3 << 4) +#define IT66121_AFE_IP_ER0 BIT(3) +#define IT66121_AFE_IP_RESETB BIT(2) +#define IT66121_AFE_IP_ENC BIT(1) +#define IT66121_AFE_IP_EC1 BIT(0) + +#define IT66121_AFE_XP_EC1_REG 0x68 +#define IT66121_AFE_XP_EC1_LOWCLK BIT(4) + +#define IT66121_SW_RST_REG 0x04 +#define IT66121_SW_RST_REF BIT(5) +#define IT66121_SW_RST_AREFBIT(4) +#define IT66121_SW_RST_VID BIT(3) +#define IT66121_SW_RST_AUD BIT(2) +#define IT66121_SW_RST_HDCPBIT(0) + +#define IT66121_DDC_COMMAND_REG0x15 +#define IT66121_DDC_COMMAND_BURST_READ 0x0 +#define IT66121_DDC_COMMAND_EDID_READ
Re: [PATCH 3/3] drm: bridge: add it66121 driver
Hi Phong. On Mon, Mar 09, 2020 at 04:36:54PM +0100, Phong LE wrote: > This commit is a simple driver for bridge HMDI it66121. > The input format is RBG and there is no color conversion. > Audio, HDCP and CEC are not supported yet. Nice driver. Some few comments below. Patch fails to apply/build on top of drm-misc-next. Please patch next version so it applies and works on top of drm-misc-next, as this is where this patch will go in. Who will maintain the driver? Maybe update MAINTAINERS? Sam > @@ -0,0 +1,983 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2020 BayLibre, SAS > + * Author: Phong LE > + * Copyright (C) 2018-2019, Artem Mygaiev > + * Copyright (C) 2017, Fresco Logic, Incorporated. > + * > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include Sort alphabetically (almost done), and remove duplicate. > + > +static int ite66121_power_off(struct it66121_ctx *ctx) > +{ > + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > +} > + > +static inline int it66121_preamble_ddc(struct it66121_ctx *ctx) Let the compiler do the inline decision - no need to specify it here. > +{ > + return regmap_write(ctx->regmap, IT66121_MASTER_SEL_REG, > + IT66121_MASTER_SEL_HOST); > +} > + > +static inline int it66121_fire_afe(struct it66121_ctx *ctx) > +{ > + return regmap_write(ctx->regmap, IT66121_AFE_DRV_REG, 0); > +} > + > +static int it66121_configure_input(struct it66121_ctx *ctx) > +{ > + int ret; > + > + ret = regmap_write(ctx->regmap, IT66121_INPUT_MODE_REG, > +ctx->conf->input_mode_reg); > + if (ret) > + return ret; > + > + return regmap_write(ctx->regmap, IT66121_INPUT_CSC_REG, > + ctx->conf->input_conversion_reg); > +} > + Maybe a small comment: /* Configure analog front end */ So readers do not have to second guess the "afe" abbreavation. Or spell it out. > +static int it66121_configure_afe(struct it66121_ctx *ctx, > + const struct drm_display_mode *mode) > +{ > + int ret; > + > + ret = regmap_write(ctx->regmap, IT66121_AFE_DRV_REG, > +IT66121_AFE_DRV_RST); > + if (ret) > + return ret; > + > + if (mode->clock > IT66121_AFE_CLK_HIGH) { > + ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG, > + IT66121_AFE_XP_GAINBIT | > + IT66121_AFE_XP_ENO, > + IT66121_AFE_XP_GAINBIT); > + if (ret) > + return ret; > + > + ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG, > + IT66121_AFE_IP_GAINBIT | > + IT66121_AFE_IP_ER0 | > + IT66121_AFE_IP_EC1, > + IT66121_AFE_IP_GAINBIT); > + if (ret) > + return ret; > + > + ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG, > + IT66121_AFE_XP_EC1_LOWCLK, 0x80); > + if (ret) > + return ret; > + } else { > + ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG, > + IT66121_AFE_XP_GAINBIT | > + IT66121_AFE_XP_ENO, > + IT66121_AFE_XP_ENO); > + if (ret) > + return ret; > + > + ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG, > + IT66121_AFE_IP_GAINBIT | > + IT66121_AFE_IP_ER0 | > + IT66121_AFE_IP_EC1, IT66121_AFE_IP_ER0 | > + IT66121_AFE_IP_EC1); > + if (ret) > + return ret; > + > + ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG, > + IT66121_AFE_XP_EC1_LOWCLK, > + IT66121_AFE_XP_EC1_LOWCLK); > + if (ret) > + return ret; > + } > + > + /* Clear reset flags */ > + ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG, > + IT66121_SW_RST_REF | IT66121_SW_RST_VID, > + ~(IT66121_SW_RST_REF | IT66121_SW_RST_VID) & > + 0xFF); > + if (ret) > + return ret; > + > + return it66121_fire_afe(ctx); > +} > + > +static inline int it66121_wait_ddc_ready(struct it66121_ctx *ctx) Drop inline > +{ > + int ret, val; > + > + ret = regmap_read_poll_timeout(ctx->regmap, IT66121_DDC_STATUS_REG, > +