The new bridge rework to support the input and output formats introduced some boilerplate code that will need to be shared across drivers.
Since dw-hdmi is the only driver so far, let's introduce those helpers based on that code.
Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_hdmi.c | 170 +++++++++++++++++++++++++++++++++++++ include/drm/drm_hdmi.h | 24 ++++++ 3 files changed, 195 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/drm_hdmi.c create mode 100644 include/drm/drm_hdmi.h
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 5eb5bf7c16e3..1b77bd64a37e 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -17,7 +17,7 @@ drm-y := drm_auth.o drm_cache.o \ drm_plane.o drm_color_mgmt.o drm_print.o \ drm_dumb_buffers.o drm_mode_config.o drm_vblank.o \ drm_syncobj.o drm_lease.o drm_writeback.o drm_client.o \ - drm_client_modeset.o drm_atomic_uapi.o drm_hdcp.o \ + drm_client_modeset.o drm_atomic_uapi.o drm_hdmi.o drm_hdcp.o \ drm_managed.o drm_vblank_work.o
drm-$(CONFIG_DRM_LEGACY) += drm_bufs.o drm_context.o drm_dma.o drm_legacy_misc.o drm_lock.o \ diff --git a/drivers/gpu/drm/drm_hdmi.c b/drivers/gpu/drm/drm_hdmi.c new file mode 100644 index 000000000000..3834d5dd6d88 --- /dev/null +++ b/drivers/gpu/drm/drm_hdmi.c @@ -0,0 +1,170 @@ +#include <linux/errno.h> +#include <linux/hdmi.h> +#include <linux/media-bus-format.h> +#include <linux/types.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_hdmi.h> + +/** + * drm_hdmi_bus_fmt_is_rgb() - Is the media bus format an RGB format? + * @bus_format: MEDIA_BUS_FMT* to test + * + * Checks if the media bus format is an RGB one + * + * RETURNS: + * True if the format is an RGB one, false otherwise + */ +bool drm_hdmi_bus_fmt_is_rgb(u32 bus_format) +{ + switch (bus_format) { + case MEDIA_BUS_FMT_RGB888_1X24: + case MEDIA_BUS_FMT_RGB101010_1X30: + case MEDIA_BUS_FMT_RGB121212_1X36: + case MEDIA_BUS_FMT_RGB161616_1X48: + return true; + + default: + return false; + } +} +EXPORT_SYMBOL(drm_hdmi_bus_fmt_is_rgb); + +/** + * drm_hdmi_bus_fmt_is_yuv444() - Is the media bus format an YUV444 format? + * @bus_format: MEDIA_BUS_FMT* to test + * + * Checks if the media bus format is an YUV444 one + * + * RETURNS: + * True if the format is an YUV444 one, false otherwise + */ +bool drm_hdmi_bus_fmt_is_yuv444(u32 bus_format) +{ + switch (bus_format) { + case MEDIA_BUS_FMT_YUV8_1X24: + case MEDIA_BUS_FMT_YUV10_1X30: + case MEDIA_BUS_FMT_YUV12_1X36: + case MEDIA_BUS_FMT_YUV16_1X48: + return true; + + default: + return false; + } +} +EXPORT_SYMBOL(drm_hdmi_bus_fmt_is_yuv444); + +/** + * drm_hdmi_bus_fmt_is_yuv422() - Is the media bus format an YUV422 format? + * @bus_format: MEDIA_BUS_FMT* to test + * + * Checks if the media bus format is an YUV422 one + * + * RETURNS: + * True if the format is an YUV422 one, false otherwise + */ +bool drm_hdmi_bus_fmt_is_yuv422(u32 bus_format) +{ + switch (bus_format) { + case MEDIA_BUS_FMT_UYVY8_1X16: + case MEDIA_BUS_FMT_UYVY10_1X20: + case MEDIA_BUS_FMT_UYVY12_1X24: + return true; + + default: + return false; + } +} +EXPORT_SYMBOL(drm_hdmi_bus_fmt_is_yuv422); + +/** + * drm_hdmi_bus_fmt_is_yuv420() - Is the media bus format an YUV420 format? + * @bus_format: MEDIA_BUS_FMT* to test + * + * Checks if the media bus format is an YUV420 one + * + * RETURNS: + * True if the format is an YUV420 one, false otherwise + */ +bool drm_hdmi_bus_fmt_is_yuv420(u32 bus_format) +{ + switch (bus_format) { + case MEDIA_BUS_FMT_UYYVYY8_0_5X24: + case MEDIA_BUS_FMT_UYYVYY10_0_5X30: + case MEDIA_BUS_FMT_UYYVYY12_0_5X36: + case MEDIA_BUS_FMT_UYYVYY16_0_5X48: + return true; + + default: + return false; + } +} +EXPORT_SYMBOL(drm_hdmi_bus_fmt_is_yuv420); + +/** + * drm_hdmi_bus_fmt_color_depth() - Returns the color depth in bits + * @bus_format: MEDIA_BUS_FMT* to test + * + * Computes the number of bits per color for a given media bus format + * + * RETURNS: + * The number of bits per color + */ +int drm_hdmi_bus_fmt_color_depth(u32 bus_format) +{ + switch (bus_format) { + case MEDIA_BUS_FMT_RGB888_1X24: + case MEDIA_BUS_FMT_YUV8_1X24: + case MEDIA_BUS_FMT_UYVY8_1X16: + case MEDIA_BUS_FMT_UYYVYY8_0_5X24: + return 8; + + case MEDIA_BUS_FMT_RGB101010_1X30: + case MEDIA_BUS_FMT_YUV10_1X30: + case MEDIA_BUS_FMT_UYVY10_1X20: + case MEDIA_BUS_FMT_UYYVYY10_0_5X30: + return 10; + + case MEDIA_BUS_FMT_RGB121212_1X36: + case MEDIA_BUS_FMT_YUV12_1X36: + case MEDIA_BUS_FMT_UYVY12_1X24: + case MEDIA_BUS_FMT_UYYVYY12_0_5X36: + return 12; + + case MEDIA_BUS_FMT_RGB161616_1X48: + case MEDIA_BUS_FMT_YUV16_1X48: + case MEDIA_BUS_FMT_UYYVYY16_0_5X48: + return 16; + + default: + return 0; + } +} +EXPORT_SYMBOL(drm_hdmi_bus_fmt_color_depth); + +/** + * drm_hdmi_bus_fmt_color_depth() - Returns the color depth in bits + * @bus_format: MEDIA_BUS_FMT* to test + * + * Computes the number of bits per color for a given media bus format + * + * RETURNS: + * The number of bits per color + */ +int drm_hdmi_avi_infoframe_output_colorspace(struct hdmi_avi_infoframe *frame, + struct drm_bus_cfg *out_bus_cfg) +{ + if (drm_hdmi_bus_fmt_is_yuv444(out_bus_cfg->format)) + frame->colorspace = HDMI_COLORSPACE_YUV444; + else if (drm_hdmi_bus_fmt_is_yuv422(out_bus_cfg->format)) + frame->colorspace = HDMI_COLORSPACE_YUV422; + else if (drm_hdmi_bus_fmt_is_yuv420(out_bus_cfg->format)) + frame->colorspace = HDMI_COLORSPACE_YUV420; + else if (drm_hdmi_bus_fmt_is_rgb(out_bus_cfg->format)) + frame->colorspace = HDMI_COLORSPACE_RGB; + else + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL(drm_hdmi_avi_infoframe_output_colorspace); diff --git a/include/drm/drm_hdmi.h b/include/drm/drm_hdmi.h new file mode 100644 index 000000000000..8cd281699ea0 --- /dev/null +++ b/include/drm/drm_hdmi.h @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013-2015 Mentor Graphics Inc. + * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. + * Copyright (C) 2010, Guennadi Liakhovetski g.liakhovetski@gmx.de + */ + +#ifndef __DRM_HDMI_H_ +#define __DRM_HDMI_H_ + +#include <linux/types.h> + +struct drm_bus_cfg; +struct hdmi_avi_infoframe; + +bool drm_hdmi_bus_fmt_is_rgb(u32 bus_format); +bool drm_hdmi_bus_fmt_is_yuv444(u32 bus_format); +bool drm_hdmi_bus_fmt_is_yuv422(u32 bus_format); +bool drm_hdmi_bus_fmt_is_yuv420(u32 bus_format); +int drm_hdmi_bus_fmt_color_depth(u32 bus_format); +int drm_hdmi_avi_infoframe_output_colorspace(struct hdmi_avi_infoframe *frame, + struct drm_bus_cfg *out_bus_cfg); + +#endif // __DRM_HDMI_H_