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drm/amdgpu: Add default case in DVI mode validation

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amdgpu_connector_dvi_mode_valid() assigns max_digital_pixel_clock_khz
based on connector_object_id using a switch statement that lacks a
default case.

In practice this code path should never be hit because the existing
cases already cover all digital connector types that this function is
used for. This is also legacy display code which is not used for new
hardware.

Add a default case returning MODE_BAD to make the switch exhaustive and
silence the static analyzer smatch error. The new branch is effectively
defensive and should never be reached during normal operation.

Fixes: 585b2f685c ("drm/amdgpu: Respect max pixel clock for HDMI and DVI-D (v2)")
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Timur Kristóf <timur.kristof@gmail.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Srinivasan Shanmugam 2026-03-12 19:29:54 +05:30 committed by Alex Deucher
parent 6b606216e0
commit e6020a55b8
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
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@ -1231,6 +1231,8 @@ static enum drm_mode_status amdgpu_connector_dvi_mode_valid(struct drm_connector
case CONNECTOR_OBJECT_ID_HDMI_TYPE_B:
max_digital_pixel_clock_khz = max_dvi_single_link_pixel_clock * 2;
break;
default:
return MODE_BAD;
}
/* When the display EDID claims that it's an HDMI display,