Commit ade1fc91 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/edid: Extract drm_edid_decode_mfg_id() 



Make the PNPID decoding available for other users.

Cc: dri-devel@lists.freedesktop.org
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220510104242.6099-15-ville.syrjala@linux.intel.com
parent 952cd974

include/drm/drm_edid.h

+17 −4
Original line number Diff line number Diff line
@@ -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);