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drm/modes: parse_cmdline: Add support for specifying panel_orientation (v2)

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Sometimes we want to override a connector's panel_orientation from the
kernel commandline. Either for testing and for special cases, e.g. a kiosk
like setup which uses a TV mounted in portrait mode.

Users can already specify a "rotate" option through a video= kernel cmdline
option. But that only supports 0/180 degrees (see drm_client_modeset TODO)
and only works for in kernel modeset clients, not for userspace kms users.

The "panel-orientation" connector property OTOH does support 90/270 degrees
as it leaves dealing with the rotation up to userspace and this does work
for userspace kms clients (at least those which support this property).

Changes in v2:
-Add missing ':' after @panel_orientation (reported by kbuild test robot)

BugLink: https://gitlab.freedesktop.org/plymouth/plymouth/merge_requests/83
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191118155134.30468-9-hdegoede@redhat.com
This commit is contained in:
Hans de Goede
2019-11-18 16:51:30 +01:00
parent 7b1cce760a
commit 4e7a4a6fbd
5 changed files with 66 additions and 0 deletions
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22
drivers/gpu/drm/selftests/test-drm_cmdline_parser.c
View File

@@ -1092,6 +1092,28 @@ static int drm_cmdline_test_freestanding_force_e_and_options(void *ignored)
return 0;
}
static int drm_cmdline_test_panel_orientation(void *ignored)
{
struct drm_cmdline_mode mode = { };
FAIL_ON(!drm_mode_parse_command_line_for_connector("panel_orientation=upside_down",
&no_connector,
&mode));
FAIL_ON(mode.specified);
FAIL_ON(mode.refresh_specified);
FAIL_ON(mode.bpp_specified);
FAIL_ON(mode.panel_orientation != DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP);
FAIL_ON(mode.rb);
FAIL_ON(mode.cvt);
FAIL_ON(mode.interlace);
FAIL_ON(mode.margins);
FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
return 0;
}
#include "drm_selftest.c"
static int __init test_drm_cmdline_init(void)