-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
drm/edid: split out drm_eld.h from drm_edid.h
The drm_edid.[ch] files are starting to be a bit crowded, and with plans to add more ELD related functionality, it's perhaps cleanest to split the ELD code out to a header of its own. Include drm_eld.h from drm_edid.h for starters, and leave it to follow-up work to only include drm_eld.h where needed. Cc: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com> Reviewed-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/0c6d631fa1058036d72dd25d1cabc90a7c52490e.1698747331.git.jani.nikula@intel.com
- Loading branch information
Jani Nikula
committed
Nov 9, 2023
1 parent
c400eb4
commit 8eb8094
Showing
3 changed files
with
163 additions
and
148 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| /* SPDX-License-Identifier: MIT */ | ||
| /* | ||
| * Copyright © 2023 Intel Corporation | ||
| */ | ||
|
|
||
| #ifndef __DRM_ELD_H__ | ||
| #define __DRM_ELD_H__ | ||
|
|
||
| #include <linux/types.h> | ||
|
|
||
| /* ELD Header Block */ | ||
| #define DRM_ELD_HEADER_BLOCK_SIZE 4 | ||
|
|
||
| #define DRM_ELD_VER 0 | ||
| # define DRM_ELD_VER_SHIFT 3 | ||
| # define DRM_ELD_VER_MASK (0x1f << 3) | ||
| # define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */ | ||
| # define DRM_ELD_VER_CANNED (0x1f << 3) | ||
|
|
||
| #define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */ | ||
|
|
||
| /* ELD Baseline Block for ELD_Ver == 2 */ | ||
| #define DRM_ELD_CEA_EDID_VER_MNL 4 | ||
| # define DRM_ELD_CEA_EDID_VER_SHIFT 5 | ||
| # define DRM_ELD_CEA_EDID_VER_MASK (7 << 5) | ||
| # define DRM_ELD_CEA_EDID_VER_NONE (0 << 5) | ||
| # define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5) | ||
| # define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5) | ||
| # define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5) | ||
| # define DRM_ELD_MNL_SHIFT 0 | ||
| # define DRM_ELD_MNL_MASK (0x1f << 0) | ||
|
|
||
| #define DRM_ELD_SAD_COUNT_CONN_TYPE 5 | ||
| # define DRM_ELD_SAD_COUNT_SHIFT 4 | ||
| # define DRM_ELD_SAD_COUNT_MASK (0xf << 4) | ||
| # define DRM_ELD_CONN_TYPE_SHIFT 2 | ||
| # define DRM_ELD_CONN_TYPE_MASK (3 << 2) | ||
| # define DRM_ELD_CONN_TYPE_HDMI (0 << 2) | ||
| # define DRM_ELD_CONN_TYPE_DP (1 << 2) | ||
| # define DRM_ELD_SUPPORTS_AI (1 << 1) | ||
| # define DRM_ELD_SUPPORTS_HDCP (1 << 0) | ||
|
|
||
| #define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */ | ||
| # define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */ | ||
|
|
||
| #define DRM_ELD_SPEAKER 7 | ||
| # define DRM_ELD_SPEAKER_MASK 0x7f | ||
| # define DRM_ELD_SPEAKER_RLRC (1 << 6) | ||
| # define DRM_ELD_SPEAKER_FLRC (1 << 5) | ||
| # define DRM_ELD_SPEAKER_RC (1 << 4) | ||
| # define DRM_ELD_SPEAKER_RLR (1 << 3) | ||
| # define DRM_ELD_SPEAKER_FC (1 << 2) | ||
| # define DRM_ELD_SPEAKER_LFE (1 << 1) | ||
| # define DRM_ELD_SPEAKER_FLR (1 << 0) | ||
|
|
||
| #define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */ | ||
| # define DRM_ELD_PORT_ID_LEN 8 | ||
|
|
||
| #define DRM_ELD_MANUFACTURER_NAME0 16 | ||
| #define DRM_ELD_MANUFACTURER_NAME1 17 | ||
|
|
||
| #define DRM_ELD_PRODUCT_CODE0 18 | ||
| #define DRM_ELD_PRODUCT_CODE1 19 | ||
|
|
||
| #define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */ | ||
|
|
||
| #define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad)) | ||
|
|
||
| /** | ||
| * drm_eld_mnl - Get ELD monitor name length in bytes. | ||
| * @eld: pointer to an eld memory structure with mnl set | ||
| */ | ||
| static inline int drm_eld_mnl(const uint8_t *eld) | ||
| { | ||
| return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT; | ||
| } | ||
|
|
||
| /** | ||
| * drm_eld_sad - Get ELD SAD structures. | ||
| * @eld: pointer to an eld memory structure with sad_count set | ||
| */ | ||
| static inline const uint8_t *drm_eld_sad(const uint8_t *eld) | ||
| { | ||
| unsigned int ver, mnl; | ||
|
|
||
| ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT; | ||
| if (ver != 2 && ver != 31) | ||
| return NULL; | ||
|
|
||
| mnl = drm_eld_mnl(eld); | ||
| if (mnl > 16) | ||
| return NULL; | ||
|
|
||
| return eld + DRM_ELD_CEA_SAD(mnl, 0); | ||
| } | ||
|
|
||
| /** | ||
| * drm_eld_sad_count - Get ELD SAD count. | ||
| * @eld: pointer to an eld memory structure with sad_count set | ||
| */ | ||
| static inline int drm_eld_sad_count(const uint8_t *eld) | ||
| { | ||
| return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >> | ||
| DRM_ELD_SAD_COUNT_SHIFT; | ||
| } | ||
|
|
||
| /** | ||
| * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes | ||
| * @eld: pointer to an eld memory structure with mnl and sad_count set | ||
| * | ||
| * This is a helper for determining the payload size of the baseline block, in | ||
| * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block. | ||
| */ | ||
| static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld) | ||
| { | ||
| return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE + | ||
| drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3; | ||
| } | ||
|
|
||
| /** | ||
| * drm_eld_size - Get ELD size in bytes | ||
| * @eld: pointer to a complete eld memory structure | ||
| * | ||
| * The returned value does not include the vendor block. It's vendor specific, | ||
| * and comprises of the remaining bytes in the ELD memory buffer after | ||
| * drm_eld_size() bytes of header and baseline block. | ||
| * | ||
| * The returned value is guaranteed to be a multiple of 4. | ||
| */ | ||
| static inline int drm_eld_size(const uint8_t *eld) | ||
| { | ||
| return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4; | ||
| } | ||
|
|
||
| /** | ||
| * drm_eld_get_spk_alloc - Get speaker allocation | ||
| * @eld: pointer to an ELD memory structure | ||
| * | ||
| * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER | ||
| * field definitions to identify speakers. | ||
| */ | ||
| static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld) | ||
| { | ||
| return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK; | ||
| } | ||
|
|
||
| /** | ||
| * drm_eld_get_conn_type - Get device type hdmi/dp connected | ||
| * @eld: pointer to an ELD memory structure | ||
| * | ||
| * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to | ||
| * identify the display type connected. | ||
| */ | ||
| static inline u8 drm_eld_get_conn_type(const uint8_t *eld) | ||
| { | ||
| return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK; | ||
| } | ||
|
|
||
| #endif /* __DRM_ELD_H__ */ |