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Date: Fri, 8 May 2015 09:39:33 +0200 From: Jean-Francois Moine <moinejf@...e.fr> To: Mark Brown <broonie@...nel.org>, Russell King - ARM Linux <linux@....linux.org.uk> Cc: Dave Airlie <airlied@...il.com>, Andrew Jackson <Andrew.Jackson@....com>, Jyri Sarha <jsarha@...com>, alsa-devel@...a-project.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v12 1/6] drm/edid: add function to help find SADs From: Russell King - ARM Linux <linux@....linux.org.uk> Add a function to find the start of the SADs in the ELD. This complements the helper to retrieve the SAD count. Signed-off-by: Jean-Francois Moine <moinejf@...e.fr> --- include/drm/drm_edid.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 7990501..53c53c4 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -348,6 +348,25 @@ static inline int drm_eld_mnl(const uint8_t *eld) } /** + * 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 */ -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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