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1// SPDX-License-Identifier: MIT2 3#include <linux/module.h>4 5#include <drm/display/drm_hdmi_helper.h>6#include <drm/drm_connector.h>7#include <drm/drm_edid.h>8#include <drm/drm_modes.h>9#include <drm/drm_print.h>10#include <drm/drm_property.h>11 12static inline bool is_eotf_supported(u8 output_eotf, u8 sink_eotf)13{14 return sink_eotf & BIT(output_eotf);15}16 17/**18 * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI DRM infoframe with19 * HDR metadata from userspace20 * @frame: HDMI DRM infoframe21 * @conn_state: Connector state containing HDR metadata22 *23 * Return: 0 on success or a negative error code on failure.24 */25int drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,26 const struct drm_connector_state *conn_state)27{28 struct drm_connector *connector;29 struct hdr_output_metadata *hdr_metadata;30 int err;31 32 if (!frame || !conn_state)33 return -EINVAL;34 35 connector = conn_state->connector;36 37 if (!conn_state->hdr_output_metadata)38 return -EINVAL;39 40 hdr_metadata = conn_state->hdr_output_metadata->data;41 42 if (!hdr_metadata || !connector)43 return -EINVAL;44 45 /* Sink EOTF is Bit map while infoframe is absolute values */46 if (!is_eotf_supported(hdr_metadata->hdmi_metadata_type1.eotf,47 connector->hdr_sink_metadata.hdmi_type1.eotf))48 DRM_DEBUG_KMS("Unknown EOTF %d\n", hdr_metadata->hdmi_metadata_type1.eotf);49 50 err = hdmi_drm_infoframe_init(frame);51 if (err < 0)52 return err;53 54 frame->eotf = hdr_metadata->hdmi_metadata_type1.eotf;55 frame->metadata_type = hdr_metadata->hdmi_metadata_type1.metadata_type;56 57 BUILD_BUG_ON(sizeof(frame->display_primaries) !=58 sizeof(hdr_metadata->hdmi_metadata_type1.display_primaries));59 BUILD_BUG_ON(sizeof(frame->white_point) !=60 sizeof(hdr_metadata->hdmi_metadata_type1.white_point));61 62 memcpy(&frame->display_primaries,63 &hdr_metadata->hdmi_metadata_type1.display_primaries,64 sizeof(frame->display_primaries));65 66 memcpy(&frame->white_point,67 &hdr_metadata->hdmi_metadata_type1.white_point,68 sizeof(frame->white_point));69 70 frame->max_display_mastering_luminance =71 hdr_metadata->hdmi_metadata_type1.max_display_mastering_luminance;72 frame->min_display_mastering_luminance =73 hdr_metadata->hdmi_metadata_type1.min_display_mastering_luminance;74 frame->max_fall = hdr_metadata->hdmi_metadata_type1.max_fall;75 frame->max_cll = hdr_metadata->hdmi_metadata_type1.max_cll;76 77 return 0;78}79EXPORT_SYMBOL(drm_hdmi_infoframe_set_hdr_metadata);80 81/* HDMI Colorspace Spec Definitions */82#define FULL_COLORIMETRY_MASK 0x1FF83#define NORMAL_COLORIMETRY_MASK 0x384#define EXTENDED_COLORIMETRY_MASK 0x785#define EXTENDED_ACE_COLORIMETRY_MASK 0xF86 87#define C(x) ((x) << 0)88#define EC(x) ((x) << 2)89#define ACE(x) ((x) << 5)90 91#define HDMI_COLORIMETRY_NO_DATA 0x092#define HDMI_COLORIMETRY_SMPTE_170M_YCC (C(1) | EC(0) | ACE(0))93#define HDMI_COLORIMETRY_BT709_YCC (C(2) | EC(0) | ACE(0))94#define HDMI_COLORIMETRY_XVYCC_601 (C(3) | EC(0) | ACE(0))95#define HDMI_COLORIMETRY_XVYCC_709 (C(3) | EC(1) | ACE(0))96#define HDMI_COLORIMETRY_SYCC_601 (C(3) | EC(2) | ACE(0))97#define HDMI_COLORIMETRY_OPYCC_601 (C(3) | EC(3) | ACE(0))98#define HDMI_COLORIMETRY_OPRGB (C(3) | EC(4) | ACE(0))99#define HDMI_COLORIMETRY_BT2020_CYCC (C(3) | EC(5) | ACE(0))100#define HDMI_COLORIMETRY_BT2020_RGB (C(3) | EC(6) | ACE(0))101#define HDMI_COLORIMETRY_BT2020_YCC (C(3) | EC(6) | ACE(0))102#define HDMI_COLORIMETRY_DCI_P3_RGB_D65 (C(3) | EC(7) | ACE(0))103#define HDMI_COLORIMETRY_DCI_P3_RGB_THEATER (C(3) | EC(7) | ACE(1))104 105static const u32 hdmi_colorimetry_val[] = {106 [DRM_MODE_COLORIMETRY_NO_DATA] = HDMI_COLORIMETRY_NO_DATA,107 [DRM_MODE_COLORIMETRY_SMPTE_170M_YCC] = HDMI_COLORIMETRY_SMPTE_170M_YCC,108 [DRM_MODE_COLORIMETRY_BT709_YCC] = HDMI_COLORIMETRY_BT709_YCC,109 [DRM_MODE_COLORIMETRY_XVYCC_601] = HDMI_COLORIMETRY_XVYCC_601,110 [DRM_MODE_COLORIMETRY_XVYCC_709] = HDMI_COLORIMETRY_XVYCC_709,111 [DRM_MODE_COLORIMETRY_SYCC_601] = HDMI_COLORIMETRY_SYCC_601,112 [DRM_MODE_COLORIMETRY_OPYCC_601] = HDMI_COLORIMETRY_OPYCC_601,113 [DRM_MODE_COLORIMETRY_OPRGB] = HDMI_COLORIMETRY_OPRGB,114 [DRM_MODE_COLORIMETRY_BT2020_CYCC] = HDMI_COLORIMETRY_BT2020_CYCC,115 [DRM_MODE_COLORIMETRY_BT2020_RGB] = HDMI_COLORIMETRY_BT2020_RGB,116 [DRM_MODE_COLORIMETRY_BT2020_YCC] = HDMI_COLORIMETRY_BT2020_YCC,117};118 119#undef C120#undef EC121#undef ACE122 123/**124 * drm_hdmi_avi_infoframe_colorimetry() - fill the HDMI AVI infoframe125 * colorimetry information126 * @frame: HDMI AVI infoframe127 * @conn_state: connector state128 */129void drm_hdmi_avi_infoframe_colorimetry(struct hdmi_avi_infoframe *frame,130 const struct drm_connector_state *conn_state)131{132 u32 colorimetry_val;133 u32 colorimetry_index = conn_state->colorspace & FULL_COLORIMETRY_MASK;134 135 if (colorimetry_index >= ARRAY_SIZE(hdmi_colorimetry_val))136 colorimetry_val = HDMI_COLORIMETRY_NO_DATA;137 else138 colorimetry_val = hdmi_colorimetry_val[colorimetry_index];139 140 frame->colorimetry = colorimetry_val & NORMAL_COLORIMETRY_MASK;141 /*142 * ToDo: Extend it for ACE formats as well. Modify the infoframe143 * structure and extend it in drivers/video/hdmi144 */145 frame->extended_colorimetry = (colorimetry_val >> 2) &146 EXTENDED_COLORIMETRY_MASK;147}148EXPORT_SYMBOL(drm_hdmi_avi_infoframe_colorimetry);149 150/**151 * drm_hdmi_avi_infoframe_bars() - fill the HDMI AVI infoframe152 * bar information153 * @frame: HDMI AVI infoframe154 * @conn_state: connector state155 */156void drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame,157 const struct drm_connector_state *conn_state)158{159 frame->right_bar = conn_state->tv.margins.right;160 frame->left_bar = conn_state->tv.margins.left;161 frame->top_bar = conn_state->tv.margins.top;162 frame->bottom_bar = conn_state->tv.margins.bottom;163}164EXPORT_SYMBOL(drm_hdmi_avi_infoframe_bars);165 166/**167 * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe168 * content type information, based169 * on correspondent DRM property.170 * @frame: HDMI AVI infoframe171 * @conn_state: DRM display connector state172 *173 */174void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,175 const struct drm_connector_state *conn_state)176{177 switch (conn_state->content_type) {178 case DRM_MODE_CONTENT_TYPE_GRAPHICS:179 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;180 break;181 case DRM_MODE_CONTENT_TYPE_CINEMA:182 frame->content_type = HDMI_CONTENT_TYPE_CINEMA;183 break;184 case DRM_MODE_CONTENT_TYPE_GAME:185 frame->content_type = HDMI_CONTENT_TYPE_GAME;186 break;187 case DRM_MODE_CONTENT_TYPE_PHOTO:188 frame->content_type = HDMI_CONTENT_TYPE_PHOTO;189 break;190 default:191 /* Graphics is the default(0) */192 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;193 }194 195 frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA;196}197EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);198 199/**200 * drm_hdmi_compute_mode_clock() - Computes the TMDS Character Rate201 * @mode: Display mode to compute the clock for202 * @bpc: Bits per character203 * @fmt: Output Pixel Format used204 *205 * Returns the TMDS Character Rate for a given mode, bpc count and output format.206 *207 * RETURNS:208 * The TMDS Character Rate, in Hertz, or 0 on error.209 */210unsigned long long211drm_hdmi_compute_mode_clock(const struct drm_display_mode *mode,212 unsigned int bpc, enum hdmi_colorspace fmt)213{214 unsigned long long clock = mode->clock * 1000ULL;215 unsigned int vic = drm_match_cea_mode(mode);216 217 /*218 * CTA-861-G Spec, section 5.4 - Color Coding and Quantization219 * mandates that VIC 1 always uses 8 bpc.220 */221 if (vic == 1 && bpc != 8)222 return 0;223 224 if (fmt == HDMI_COLORSPACE_YUV422) {225 /*226 * HDMI 1.0 Spec, section 6.5 - Pixel Encoding states that227 * YUV422 sends 24 bits over three channels, with Cb and Cr228 * components being sent on odd and even pixels, respectively.229 *230 * If fewer than 12 bpc are sent, data are left justified.231 */232 if (bpc > 12)233 return 0;234 235 /*236 * HDMI 1.0 Spec, section 6.5 - Pixel Encoding237 * specifies that YUV422 sends two 12-bits components over238 * three TMDS channels per pixel clock, which is equivalent to239 * three 8-bits components over three channels used by RGB as240 * far as the clock rate goes.241 */242 bpc = 8;243 }244 245 /*246 * HDMI 2.0 Spec, Section 7.1 - YCbCr 4:2:0 Pixel Encoding247 * specifies that YUV420 encoding is carried at a TMDS Character Rate248 * equal to half the pixel clock rate.249 */250 if (fmt == HDMI_COLORSPACE_YUV420)251 clock = clock / 2;252 253 if (mode->flags & DRM_MODE_FLAG_DBLCLK)254 clock = clock * 2;255 256 return DIV_ROUND_CLOSEST_ULL(clock * bpc, 8);257}258EXPORT_SYMBOL(drm_hdmi_compute_mode_clock);259