Signed-off-by: Chris Wilson chris@chris-wilson.co.uk --- drivers/gpu/drm/drm_modes.c | 52 +++++++++++++++++++++++++++++++++++++++++- 1 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 25bf873..b3e07ac 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -853,6 +853,52 @@ void drm_mode_validate_clocks(struct drm_device *dev, } EXPORT_SYMBOL(drm_mode_validate_clocks);

+static const char *mode_status_to_string(enum drm_mode_status status) +{ + const char *strings[] = { + [MODE_OK] = "OK", + [MODE_HSYNC] = "hsync out of range", + [MODE_VSYNC] = "vsync out of range", + [MODE_H_ILLEGAL] = "illegal horizontal timings", + [MODE_V_ILLEGAL] = "illegal vertical timings", + [MODE_BAD_WIDTH] = "requires an unsupported linepitch", + [MODE_NOMODE] = "no mode with a maching name", + [MODE_NO_INTERLACE] = "interlaced mode not supported", + [MODE_NO_DBLESCAN] = "doublescan mode not supported", + [MODE_NO_VSCAN] = "multiscan mode not supported", + [MODE_MEM] = "insufficient video memory", + [MODE_VIRTUAL_X] = "mode width too large for specified virtual size", + [MODE_VIRTUAL_Y] = "mode height too large for specified virtual size", + [MODE_MEM_VIRT] = "insufficient video memory given virtual size", + [MODE_NOCLOCK] = "no fixed clock available", + [MODE_CLOCK_HIGH] = "clock required is too high", + [MODE_CLOCK_LOW] = "clock required is too low", + [MODE_CLOCK_RANGE] = "clock/mode isn't in a ClockRange", + [MODE_BAD_HVALUE] = "horizontal timing was out of range", + [MODE_BAD_VVALUE] = "vertical timing was out of range", + [MODE_BAD_VSCAN] = "VScan value out of range", + [MODE_HSYNC_NARROW] = "horizontal sync too narrow", + [MODE_HSYNC_WIDE] = "horizontal sync too wide", + [MODE_HBLANK_NARROW] = "horizontal blanking too narrow", + [MODE_HBLANK_WIDE] = "horizontal blanking too wide", + [MODE_VSYNC_NARROW] = "vertical sync too narrow", + [MODE_VSYNC_WIDE] = "vertical sync too wide", + [MODE_VBLANK_NARROW] = "vertical blanking too narrow", + [MODE_VBLANK_WIDE] = "vertical blanking too wide", + [MODE_PANEL] = "exceeds panel dimensions", + [MODE_INTERLACE_WIDTH] = "width too large for interlaced mode", + [MODE_ONE_WIDTH] = "only one width is supported", + [MODE_ONE_HEIGHT] = "only one height is supported", + [MODE_ONE_SIZE] = "only one resolution is supported", + [MODE_NO_REDUCED] = "monitor doesn't accept reduced blanking", + }; + + if ((unsigned)status > ARRAY_SIZE(strings)) + return "unknown"; + + return strings[status]; +} + /** * drm_mode_prune_invalid - remove invalid modes from mode list * @dev: DRM device @@ -876,8 +922,10 @@ void drm_mode_prune_invalid(struct drm_device *dev, list_del(&mode->head); if (verbose) { drm_mode_debug_printmodeline(mode); - DRM_DEBUG_KMS("Not using %s mode %d\n", - mode->name, mode->status); + DRM_DEBUG_KMS("Not using %s mode: %s [%d]\n", + mode->name, + mode_status_to_string(mode->status), + mode->status); } drm_mode_destroy(dev, mode); }