From ade1fc91eb99614c7155fec762ad5761bb470e06 Mon Sep 17 00:00:00 2001 From: Ville Syrjälä Date: Tue, 10 May 2022 13:42:41 +0300 Subject: drm/edid: Extract drm_edid_decode_mfg_id() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make the PNPID decoding available for other users. Cc: dri-devel@lists.freedesktop.org Reviewed-by: Jani Nikula Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220510104242.6099-15-ville.syrjala@linux.intel.com --- include/drm/drm_edid.h | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) (limited to 'include/drm') diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index c61e75ab8f63..1d5950b5b407 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -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); -- cgit v1.2.3