drm/amd/display: Fix Signed/Unsigned Int Usage Compiler Warning

[Why] Compiler generates compiler warnings when signed enum
constants or literal -1 are implicitly converted to unsigned
integer types, cluttering build output and masking genuine issues.

[How] Use UINT_MAX as the invalid sentinel for unsigned IDs and align
loop/index types to unsigned where appropriate to remove implicit
signed-to-unsigned conversions, with no functional behavior change.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml2_dc_resource_mgmt.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml2_dc_resource_mgmt.c
index 74812a7d5e28c1fd5e2403188ff176dab7da911b..fd3c61509f1b440d9b4664cf2818b2b8a503791f 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml2_dc_resource_mgmt.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml2_dc_resource_mgmt.c
@@ -143,7 +143,7 @@ static unsigned int find_pipes_assigned_to_plane(struct dml2_context *ctx,
 {
        int i;
        unsigned int num_found = 0;
-       unsigned int plane_id_assigned_to_pipe = -1;
+       unsigned int plane_id_assigned_to_pipe = UINT_MAX;
 
        for (i = 0; i < ctx->config.dcn_pipe_count; i++) {
                struct pipe_ctx *pipe = &state->res_ctx.pipe_ctx[i];