linux-kernel - [PATCH v2] drm: Move drm_set_preferred_mode() helper from drm_edid to drm

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Message-ID: <20240102122208.3103597-1-javierm@redhat.com>
Date: Tue,  2 Jan 2024 13:21:58 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jani Nikula <jani.nikula@...el.com>,
	Javier Martinez Canillas <javierm@...hat.com>,
	Daniel Vetter <daniel@...ll.ch>,
	David Airlie <airlied@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH v2] drm: Move drm_set_preferred_mode() helper from drm_edid to drm_modes

The helper is generic, it doesn't use the opaque EDID type struct drm_edid
and is also used by drivers that only support non-probeable displays such
as fixed panels.

These drivers add a list of modes using drm_mode_probed_add() and then set
a preferred mode using the drm_set_preferred_mode() helper.

It seems more logical to have the helper definition in drm_modes.o instead
of drm_edid.o, since the former contains modes helper while the latter has
helpers to manage the EDID information.

Since both drm_edid.o and drm_modes.o object files are built-in the drm.o
object, there are no functional changes. But besides being a more logical
place for this helper, it could also allow to eventually make drm_edid.o
optional and not included in drm.o if only fixed panels must be supported
in a given system.

Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
Reviewed-by: Jani Nikula <jani.nikula@...el.com>
---

Changes in v2:
- Drop unnecessary drm_modes.h header include in drm_edid.c (Jani Nikula).
- Add Jani Nikula's Reviewed-by tag.

 drivers/gpu/drm/drm_edid.c  | 22 ----------------------
 drivers/gpu/drm/drm_modes.c | 22 ++++++++++++++++++++++
 include/drm/drm_edid.h      |  2 --
 include/drm/drm_modes.h     |  2 ++
 4 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index cb4031d5dcbb..e677dc8eb7a9 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -6989,28 +6989,6 @@ int drm_add_modes_noedid(struct drm_connector *connector,
 }
 EXPORT_SYMBOL(drm_add_modes_noedid);
 
-/**
- * drm_set_preferred_mode - Sets the preferred mode of a connector
- * @connector: connector whose mode list should be processed
- * @hpref: horizontal resolution of preferred mode
- * @vpref: vertical resolution of preferred mode
- *
- * Marks a mode as preferred if it matches the resolution specified by @hpref
- * and @vpref.
- */
-void drm_set_preferred_mode(struct drm_connector *connector,
-			   int hpref, int vpref)
-{
-	struct drm_display_mode *mode;
-
-	list_for_each_entry(mode, &connector->probed_modes, head) {
-		if (mode->hdisplay == hpref &&
-		    mode->vdisplay == vpref)
-			mode->type |= DRM_MODE_TYPE_PREFERRED;
-	}
-}
-EXPORT_SYMBOL(drm_set_preferred_mode);
-
 static bool is_hdmi2_sink(const struct drm_connector *connector)
 {
 	/*
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index ac9a406250c5..01aa44e87534 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -2754,3 +2754,25 @@ bool drm_mode_is_420(const struct drm_display_info *display,
 		drm_mode_is_420_also(display, mode);
 }
 EXPORT_SYMBOL(drm_mode_is_420);
+
+/**
+ * drm_set_preferred_mode - Sets the preferred mode of a connector
+ * @connector: connector whose mode list should be processed
+ * @hpref: horizontal resolution of preferred mode
+ * @vpref: vertical resolution of preferred mode
+ *
+ * Marks a mode as preferred if it matches the resolution specified by @hpref
+ * and @vpref.
+ */
+void drm_set_preferred_mode(struct drm_connector *connector,
+			   int hpref, int vpref)
+{
+	struct drm_display_mode *mode;
+
+	list_for_each_entry(mode, &connector->probed_modes, head) {
+		if (mode->hdisplay == hpref &&
+		    mode->vdisplay == vpref)
+			mode->type |= DRM_MODE_TYPE_PREFERRED;
+	}
+}
+EXPORT_SYMBOL(drm_set_preferred_mode);
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 54cc6f04a708..5bd6b6eb6c57 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -426,8 +426,6 @@ enum hdmi_quantization_range
 drm_default_rgb_quant_range(const struct drm_display_mode *mode);
 int drm_add_modes_noedid(struct drm_connector *connector,
 			 int hdisplay, int vdisplay);
-void drm_set_preferred_mode(struct drm_connector *connector,
-			    int hpref, int vpref);
 
 int drm_edid_header_is_valid(const void *edid);
 bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index c613f0abe9dc..b9bb92e4b029 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -467,6 +467,8 @@ bool drm_mode_is_420_also(const struct drm_display_info *display,
 			  const struct drm_display_mode *mode);
 bool drm_mode_is_420(const struct drm_display_info *display,
 		     const struct drm_display_mode *mode);
+void drm_set_preferred_mode(struct drm_connector *connector,
+			    int hpref, int vpref);
 
 struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev,
 					    enum drm_connector_tv_mode mode,
-- 
2.43.0