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[2003:eb:a70b:6e00:ca7f:54ff:fe01:9321]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-439fe20c473sm38616488f8f.24.2026.03.15.15.34.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Mar 2026 15:34:58 -0700 (PDT) From: =?UTF-8?q?Johannes=20W=C3=BCller?= To: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: =?UTF-8?q?Johannes=20W=C3=BCller?= , Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , David Airlie , Simona Vetter , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 3/4] drm/amd: treat max_tmds_clock==0 as unconstrained Date: Sun, 15 Mar 2026 23:33:05 +0100 Message-ID: <20260315223307.45807-4-johanneswueller@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260315223307.45807-1-johanneswueller@gmail.com> References: <20260315223307.45807-1-johanneswueller@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If max_tmds_clock is not specified by the EDID, it should be treated as unconstrained rather than as a zero MHz limit, since it would cause adjust_colour_depth_from_display_info() to reject all color depths unconditionally. Signed-off-by: Johannes Wüller --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index bc853f7555a9..82c8dc8dd39f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -6612,7 +6612,8 @@ static bool adjust_colour_depth_from_display_info( /* The above depths are the only ones valid for HDMI. */ return false; } - if (normalized_clk <= info->max_tmds_clock) { + if (info->max_tmds_clock == 0 || + normalized_clk <= info->max_tmds_clock) { timing_out->display_color_depth = depth; return true; } -- 2.53.0