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drm: add backwards compatibility support for drm_kms_helper.edid_firmware

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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
This commit is contained in:
Jani Nikula 2017-09-18 21:20:03 +03:00
parent 53fd40a90f
commit ac6c35a4d8
3 changed files with 46 additions and 0 deletions
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16
drivers/gpu/drm/drm_edid_load.c
View File

@ -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",

28
drivers/gpu/drm/drm_kms_helper_common.c
View File

@ -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;

2
include/drm/drm_edid.h
View File

@ -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)