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authorJani Nikula <jani.nikula@intel.com>2017-09-18 21:20:03 +0300
committerJani Nikula <jani.nikula@intel.com>2017-09-19 18:11:45 +0300
commitac6c35a4d8c77083525044a192cb1a8711381e94 (patch)
treecde1cb4004507f0ee09bcb2895c14b165c29b067
parent53fd40a90f3c0bdad86ec266ee5df833f54ace39 (diff)
drm: add backwards compatibility support for drm_kms_helper.edid_firmwaredrm-misc-next-2017-09-20
Add drm_kms_helper.edid_firmware module parameter with param ops hooks to set drm.edid_firmware instead, for backwards compatibility. Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170918182003.22238-2-jani.nikula@intel.com
-rw-r--r--drivers/gpu/drm/drm_edid_load.c16
-rw-r--r--drivers/gpu/drm/drm_kms_helper_common.c28
-rw-r--r--include/drm/drm_edid.h2
3 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c
index 1c0495acf341..a4915099aaa9 100644
--- a/drivers/gpu/drm/drm_edid_load.c
+++ b/drivers/gpu/drm/drm_edid_load.c
@@ -31,6 +31,22 @@ module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644);
MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
"from built-in data or /lib/firmware instead. ");
+/* Use only for backward compatibility with drm_kms_helper.edid_firmware */
+int __drm_set_edid_firmware_path(const char *path)
+{
+ scnprintf(edid_firmware, sizeof(edid_firmware), "%s", path);
+
+ return 0;
+}
+EXPORT_SYMBOL(__drm_set_edid_firmware_path);
+
+/* Use only for backward compatibility with drm_kms_helper.edid_firmware */
+int __drm_get_edid_firmware_path(char *buf, size_t bufsize)
+{
+ return scnprintf(buf, bufsize, "%s", edid_firmware);
+}
+EXPORT_SYMBOL(__drm_get_edid_firmware_path);
+
#define GENERIC_EDIDS 6
static const char * const generic_edid_name[GENERIC_EDIDS] = {
"edid/800x600.bin",
diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
index 6e35a56a6102..93e2b30fe1a5 100644
--- a/drivers/gpu/drm/drm_kms_helper_common.c
+++ b/drivers/gpu/drm/drm_kms_helper_common.c
@@ -26,6 +26,7 @@
*/
#include <linux/module.h>
+#include <drm/drmP.h>
#include "drm_crtc_helper_internal.h"
@@ -33,6 +34,33 @@ MODULE_AUTHOR("David Airlie, Jesse Barnes");
MODULE_DESCRIPTION("DRM KMS helper");
MODULE_LICENSE("GPL and additional rights");
+#if IS_ENABLED(CONFIG_DRM_LOAD_EDID_FIRMWARE)
+
+/* Backward compatibility for drm_kms_helper.edid_firmware */
+static int edid_firmware_set(const char *val, const struct kernel_param *kp)
+{
+ DRM_NOTE("drm_kms_firmware.edid_firmware is deprecated, please use drm.edid_firmware intead.\n");
+
+ return __drm_set_edid_firmware_path(val);
+}
+
+static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
+{
+ return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
+}
+
+static const struct kernel_param_ops edid_firmware_ops = {
+ .set = edid_firmware_set,
+ .get = edid_firmware_get,
+};
+
+module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
+__MODULE_PARM_TYPE(edid_firmware, "charp");
+MODULE_PARM_DESC(edid_firmware,
+ "DEPRECATED. Use drm.edid_firmware module parameter instead.");
+
+#endif
+
static int __init drm_kms_helper_init(void)
{
int ret;
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 1e1908a6b1d6..6f35909b8add 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -341,6 +341,8 @@ int drm_av_sync_delay(struct drm_connector *connector,
#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
struct edid *drm_load_edid_firmware(struct drm_connector *connector);
+int __drm_set_edid_firmware_path(const char *path);
+int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
#else
static inline struct edid *
drm_load_edid_firmware(struct drm_connector *connector)

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