Re: [Intel-gfx] [PATCH v2 04/25] drm/edid: start propagating drm_edid to lower levels

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



LGTM.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>

Regards,

Ankit

On 5/9/2022 5:33 PM, Jani Nikula wrote:
We'll need to propagate drm_edid everywhere. This is a clunky start, but
a start nonetheless. We'll eventually convert all of the EDID parsing to
struct drm_edid.

Initially, we'll just create the struct drm_edid in stack. This will be
the compat layer for legacy struct edid code. In the future, we'll have
EDID read return drm_edid objects.

v2: Add legacy init helper.

Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
  drivers/gpu/drm/drm_edid.c | 30 +++++++++++++++++++++++++++---
  1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 480fd9fbe412..f48f1f1a1fa7 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1608,6 +1608,24 @@ static const void *edid_extension_block_data(const struct edid *edid, int index)
  	return edid_block_data(edid, index + 1);
  }
+/*
+ * Initializer helper for legacy interfaces, where we have no choice but to
+ * trust edid size. Not for general purpose use.
+ */
+static const struct drm_edid *drm_edid_legacy_init(struct drm_edid *drm_edid,
+						   const struct edid *edid)
+{
+	if (!edid)
+		return NULL;
+
+	memset(drm_edid, 0, sizeof(*drm_edid));
+
+	drm_edid->edid = edid;
+	drm_edid->size = edid_size(edid);
+
+	return drm_edid;
+}
+
  /*
   * EDID base and extension block iterator.
   *
@@ -5814,17 +5832,20 @@ static int add_displayid_detailed_modes(struct drm_connector *connector,
  }
static int drm_edid_connector_update(struct drm_connector *connector,
-				     const struct edid *edid)
+				     const struct drm_edid *drm_edid)
  {
+	const struct edid *edid;
  	int num_modes = 0;
  	u32 quirks;
- if (edid == NULL) {
+	if (!drm_edid) {
  		drm_reset_display_info(connector);
  		clear_eld(connector);
  		return 0;
  	}
+ edid = drm_edid->edid;
+
  	/*
  	 * CEA-861-F adds ycbcr capability map block, for HDMI 2.0 sinks.
  	 * To avoid multiple parsing of same block, lets parse that map
@@ -5890,13 +5911,16 @@ static int drm_edid_connector_update(struct drm_connector *connector,
   */
  int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
  {
+	struct drm_edid drm_edid;
+
  	if (edid && !drm_edid_is_valid(edid)) {
  		drm_warn(connector->dev, "%s: EDID invalid.\n",
  			 connector->name);
  		edid = NULL;
  	}
- return drm_edid_connector_update(connector, edid);
+	return drm_edid_connector_update(connector,
+					 drm_edid_legacy_init(&drm_edid, edid));
  }
  EXPORT_SYMBOL(drm_add_edid_modes);



[Index of Archives]     [Linux DRI Users]     [Linux Intel Graphics]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux