Convert drm_find_cea_extension() to a predicate function to check if the EDID has a CTA extension or a DisplayID CTA data block. This is mainly to avoid adding new users that only find the first CTA extension.
Cc: Ville Syrjälä ville.syrjala@linux.intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com --- drivers/gpu/drm/drm_edid.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 391c91199aa2..d2f64c321a13 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3558,30 +3558,29 @@ const u8 *drm_find_edid_extension(const struct edid *edid, return edid_ext; }
-static const u8 *drm_find_cea_extension(const struct edid *edid) +/* Return true if the EDID has a CTA extension or a DisplayID CTA data block */ +static bool drm_edid_has_cta_extension(const struct edid *edid) { const struct displayid_block *block; struct displayid_iter iter; - const u8 *cea; int ext_index = 0; + bool found = false;
/* Look for a top level CEA extension block */ - /* FIXME: make callers iterate through multiple CEA ext blocks? */ - cea = drm_find_edid_extension(edid, CEA_EXT, &ext_index); - if (cea) - return cea; + if (drm_find_edid_extension(edid, CEA_EXT, &ext_index)) + return true;
/* CEA blocks can also be found embedded in a DisplayID block */ displayid_iter_edid_begin(edid, &iter); displayid_iter_for_each(block, &iter) { if (block->tag == DATA_BLOCK_CTA) { - cea = (const u8 *)block; + found = true; break; } } displayid_iter_end(&iter);
- return cea; + return found; }
static __always_inline const struct drm_display_mode *cea_mode_for_vic(u8 vic) @@ -3854,8 +3853,8 @@ add_alternate_cea_modes(struct drm_connector *connector, const struct edid *edid LIST_HEAD(list); int modes = 0;
- /* Don't add CEA modes if the CEA extension block is missing */ - if (!drm_find_cea_extension(edid)) + /* Don't add CTA modes if the CTA extension block is missing */ + if (!drm_edid_has_cta_extension(edid)) return 0;
/*