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drm/edid: Extract drm_edid_decode_mfg_id()

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Make the PNPID decoding available for other users.

Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220510104242.6099-15-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2022-05-10 13:42:41 +03:00
parent 952cd97450
commit ade1fc91eb
1 changed files with 17 additions and 4 deletions
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21
include/drm/drm_edid.h
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@ -497,6 +497,22 @@ 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;
}
/**
* drm_edid_decode_mfg_id - Decode the manufacturer ID
* @mfg_id: The manufacturer ID
* @vend: A 4-byte buffer to store the 3-letter vendor string plus a '\0'
* termination
*/
static inline const char *drm_edid_decode_mfg_id(u16 mfg_id, char vend[4])
{
vend[0] = '@' + ((mfg_id >> 10) & 0x1f);
vend[1] = '@' + ((mfg_id >> 5) & 0x1f);
vend[2] = '@' + ((mfg_id >> 0) & 0x1f);
vend[3] = '\0';
return vend;
}
/**
* drm_edid_encode_panel_id - Encode an ID for matching against drm_edid_get_panel_id()
* @vend_chr_0: First character of the vendor string.
@ -537,10 +553,7 @@ static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
static inline void drm_edid_decode_panel_id(u32 panel_id, char vend[4], u16 *product_id)
{
*product_id = (u16)(panel_id & 0xffff);
vend[0] = '@' + ((panel_id >> 26) & 0x1f);
vend[1] = '@' + ((panel_id >> 21) & 0x1f);
vend[2] = '@' + ((panel_id >> 16) & 0x1f);
vend[3] = '\0';
drm_edid_decode_mfg_id(panel_id >> 16, vend);
}
bool drm_probe_ddc(struct i2c_adapter *adapter);