mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-01 06:39:05 +00:00
9bd66ab7a6
Fix the compile-time warnings
drivers/gpu/drm/drm_panel.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
drivers/gpu/drm/drm_panel_backlight_quirks.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
drivers/gpu/drm/drm_panel_orientation_quirks.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
drivers/gpu/drm/panel/panel-samsung-s6e63m0.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: a934a57a42 ("scripts/misc-check: check missing #include <linux/export.h> when W=1")
Reviewed-by: André Almeida <andrealmeid@igalia.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250612121633.229222-8-tzimmermann@suse.de
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/array_size.h>
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#include <linux/dmi.h>
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#include <linux/export.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_utils.h>
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struct drm_panel_min_backlight_quirk {
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struct {
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enum dmi_field field;
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const char * const value;
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} dmi_match;
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struct drm_edid_ident ident;
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u8 min_brightness;
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};
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static const struct drm_panel_min_backlight_quirk drm_panel_min_backlight_quirks[] = {
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/* 13 inch matte panel */
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{
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.dmi_match.field = DMI_BOARD_VENDOR,
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.dmi_match.value = "Framework",
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.ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0bca),
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.ident.name = "NE135FBM-N41",
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.min_brightness = 0,
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},
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/* 13 inch glossy panel */
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{
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.dmi_match.field = DMI_BOARD_VENDOR,
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.dmi_match.value = "Framework",
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.ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x095f),
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.ident.name = "NE135FBM-N41",
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.min_brightness = 0,
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},
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/* 13 inch 2.8k panel */
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{
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.dmi_match.field = DMI_BOARD_VENDOR,
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.dmi_match.value = "Framework",
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.ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0cb4),
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.ident.name = "NE135A1M-NY1",
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.min_brightness = 0,
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},
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};
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static bool drm_panel_min_backlight_quirk_matches(const struct drm_panel_min_backlight_quirk *quirk,
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const struct drm_edid *edid)
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{
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if (!dmi_match(quirk->dmi_match.field, quirk->dmi_match.value))
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return false;
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if (!drm_edid_match(edid, &quirk->ident))
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return false;
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return true;
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}
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/**
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* drm_get_panel_min_brightness_quirk - Get minimum supported brightness level for a panel.
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* @edid: EDID of the panel to check
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*
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* This function checks for platform specific (e.g. DMI based) quirks
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* providing info on the minimum backlight brightness for systems where this
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* cannot be probed correctly from the hard-/firm-ware.
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*
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* Returns:
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* A negative error value or
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* an override value in the range [0, 255] representing 0-100% to be scaled to
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* the drivers target range.
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*/
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int drm_get_panel_min_brightness_quirk(const struct drm_edid *edid)
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{
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const struct drm_panel_min_backlight_quirk *quirk;
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size_t i;
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if (!IS_ENABLED(CONFIG_DMI))
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return -ENODATA;
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if (!edid)
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return -EINVAL;
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for (i = 0; i < ARRAY_SIZE(drm_panel_min_backlight_quirks); i++) {
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quirk = &drm_panel_min_backlight_quirks[i];
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if (drm_panel_min_backlight_quirk_matches(quirk, edid))
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return quirk->min_brightness;
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}
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return -ENODATA;
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}
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EXPORT_SYMBOL(drm_get_panel_min_brightness_quirk);
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MODULE_DESCRIPTION("Quirks for panel backlight overrides");
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MODULE_LICENSE("GPL");
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