drm/i915/dp_mst: Don't require DSC hblank quirk for a non-DSC compatible mode

BugLink: https://bugs.launchpad.net/bugs/2097393

commit 2f54e71359eb2abc0bdf6619cd356e5e350ff27b upstream.

If an MST branch device doesn't support DSC for a given mode, but the
MST link has enough BW for the mode, assume that the branch device does
support the mode using an uncompressed stream.

Fixes: 55eaef1641 ("drm/i915/dp_mst: Handle the Synaptics HBlank expansion quirk")
Cc: stable@vger.kernel.org # v6.8+
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241009110135.1216498-2-imre.deak@intel.com
(cherry picked from commit 4e75c3e208a06ad6fd9b3517fb77337460d7c2b0)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>

This commit is contained in:

Imre Deak

2024-10-09 14:01:35 +03:00

committed by

Mehmet Basaran

parent 9a18ec8934

commit 2f803452d9

1 changed files with 3 additions and 0 deletions

									
										drivers/gpu/drm/i915/display/intel_dp_mst.c
									
		+3
		
												View File
												
				@@ -429,6 +429,9 @@ hblank_expansion_quirk_needs_dsc(const struct intel_connector *connector,

					if (mode_hblank_period_ns(adjusted_mode) > 300)

						return false;

					if (!intel_dp_mst_dsc_get_slice_count(connector, crtc_state))

						return false;

					return true;

				}