openwrt/target/linux/bcm27xx/patches-5.4/950-0473-drm-modes-parse_cmdline-Add-freestanding-argument-to.patch

From d3c76025a7de614fade5ffcaa8c1d88d8d64213e Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 18 Nov 2019 16:51:27 +0100
Subject: [PATCH] drm/modes: parse_cmdline: Add freestanding argument
 to drm_mode_parse_cmdline_options()

Commit 99e2716e053734b70434502867be24d20a3e2d84 upstream.

Add a freestanding function argument to drm_mode_parse_cmdline_options()
similar to how drm_mode_parse_cmdline_extra() already has this.

This is a preparation patch for allowing parsing of stand-alone options
without a mode before them, e.g.: video=HDMI-1:margin_right=14,...

Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191118155134.30468-6-hdegoede@redhat.com
---
 drivers/gpu/drm/drm_modes.c | 5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1592,6 +1592,7 @@ static int drm_mode_parse_cmdline_int(co
 }
 
 static int drm_mode_parse_cmdline_options(const char *str,
+					  bool freestanding,
 					  const struct drm_connector *connector,
 					  struct drm_cmdline_mode *mode)
 {
@@ -1670,6 +1671,9 @@ static int drm_mode_parse_cmdline_option
 	if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK))
 		return -EINVAL;
 
+	if (rotation && freestanding)
+		return -EINVAL;
+
 	mode->rotation_reflection = rotation;
 
 	return 0;
@@ -1862,6 +1866,7 @@ bool drm_mode_parse_command_line_for_con
 
 	if (options_ptr) {
 		ret = drm_mode_parse_cmdline_options(options_ptr + 1,
+						     false,
 						     connector, mode);
 		if (ret)
 			return false;