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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0476-drm-modes-parse_cmdline-Stop-parsing-extras-after-bp.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0476-drm-modes-parse_cmdline-Stop-parsing-extras-after-bp.patch | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0476-drm-modes-parse_cmdline-Stop-parsing-extras-after-bp.patch b/target/linux/bcm27xx/patches-5.4/950-0476-drm-modes-parse_cmdline-Stop-parsing-extras-after-bp.patch new file mode 100644 index 0000000000..1d356eb6ab --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0476-drm-modes-parse_cmdline-Stop-parsing-extras-after-bp.patch @@ -0,0 +1,95 @@ +From 0e7c5e80d8d310a881d723a426762e8822d5bf35 Mon Sep 17 00:00:00 2001 +From: Hans de Goede <hdegoede@redhat.com> +Date: Mon, 18 Nov 2019 16:51:24 +0100 +Subject: [PATCH] drm/modes: parse_cmdline: Stop parsing extras after + bpp / refresh at ', ' + +Commit c2ed3e941901810ad3d55ce1935fa22c5007fee4 upstream. + +Before this commit it was impossible to add an extra mode argument after +a bpp or refresh specifier, combined with an option, e.g. +video=HDMI-1:720x480-24e,rotate=180 would not work, either the "e" to +force enable would need to be dropped or the ",rotate=180", otherwise +the mode_option would not be accepted. + +This commit fixes this by fixing the length calculation if extras_ptr +is set to stop the extra parsing at the start of the options (stop at the +',' options_ptr points to). + +Acked-by: Maxime Ripard <mripard@kernel.org> +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +Link: https://patchwork.freedesktop.org/patch/msgid/20191118155134.30468-3-hdegoede@redhat.com +--- + drivers/gpu/drm/drm_modes.c | 10 ++++--- + .../gpu/drm/selftests/drm_cmdline_selftests.h | 1 + + .../drm/selftests/test-drm_cmdline_parser.c | 26 +++++++++++++++++++ + 3 files changed, 33 insertions(+), 4 deletions(-) + +--- a/drivers/gpu/drm/drm_modes.c ++++ b/drivers/gpu/drm/drm_modes.c +@@ -1728,7 +1728,7 @@ bool drm_mode_parse_command_line_for_con + const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; + const char *options_ptr = NULL; + char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; +- int ret; ++ int i, len, ret; + + #ifdef CONFIG_FB + if (!mode_option) +@@ -1848,9 +1848,11 @@ bool drm_mode_parse_command_line_for_con + else if (refresh_ptr) + extra_ptr = refresh_end_ptr; + +- if (extra_ptr && +- extra_ptr != options_ptr) { +- int len = strlen(name) - (extra_ptr - name); ++ if (extra_ptr) { ++ if (options_ptr) ++ len = options_ptr - extra_ptr; ++ else ++ len = strlen(extra_ptr); + + ret = drm_mode_parse_cmdline_extra(extra_ptr, len, false, + connector, mode); +--- a/drivers/gpu/drm/selftests/drm_cmdline_selftests.h ++++ b/drivers/gpu/drm/selftests/drm_cmdline_selftests.h +@@ -61,3 +61,4 @@ cmdline_test(drm_cmdline_test_vmirror) + cmdline_test(drm_cmdline_test_margin_options) + cmdline_test(drm_cmdline_test_multiple_options) + cmdline_test(drm_cmdline_test_invalid_option) ++cmdline_test(drm_cmdline_test_bpp_extra_and_option) +--- a/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c ++++ b/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c +@@ -1003,6 +1003,32 @@ static int drm_cmdline_test_invalid_opti + return 0; + } + ++static int drm_cmdline_test_bpp_extra_and_option(void *ignored) ++{ ++ struct drm_cmdline_mode mode = { }; ++ ++ FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24e,rotate=180", ++ &no_connector, ++ &mode)); ++ FAIL_ON(!mode.specified); ++ FAIL_ON(mode.xres != 720); ++ FAIL_ON(mode.yres != 480); ++ FAIL_ON(mode.rotation_reflection != DRM_MODE_ROTATE_180); ++ ++ FAIL_ON(mode.refresh_specified); ++ ++ FAIL_ON(!mode.bpp_specified); ++ FAIL_ON(mode.bpp != 24); ++ ++ FAIL_ON(mode.rb); ++ FAIL_ON(mode.cvt); ++ FAIL_ON(mode.interlace); ++ FAIL_ON(mode.margins); ++ FAIL_ON(mode.force != DRM_FORCE_ON); ++ ++ return 0; ++} ++ + #include "drm_selftest.c" + + static int __init test_drm_cmdline_init(void) |