drm/amd/display: Fix bunch of warnings in DC

Some of those are potential bugs

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

6 files changed, 5 insertions, 53 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/bandwidth_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/bandwidth_calcs.c
index 0b2bb3992f1a..3b0710ef4716 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/bandwidth_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/bandwidth_calcs.c
@@ -1709,7 +1709,7 @@ static void calculate_bandwidth(
 			else {
 				data->blackout_recovery_time = bw_max2(data->blackout_recovery_time, bw_add(bw_mul(bw_int_to_fixed(2), vbios->mcifwrmc_urgent_latency), data->mcifwr_burst_time[data->y_clk_level][data->sclk_level]));
 				if (bw_ltn(data->adjusted_data_buffer_size[k], bw_mul(bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k]), (bw_add(vbios->blackout_duration, bw_add(bw_mul(bw_int_to_fixed(2), vbios->mcifwrmc_urgent_latency), data->mcifwr_burst_time[data->y_clk_level][data->sclk_level])))))) {
-					data->blackout_recovery_time = bw_max2(data->blackout_recovery_time, bw_div((bw_add(bw_mul(bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k]), vbios->blackout_duration), bw_sub(bw_div(bw_mul(bw_mul(bw_mul((bw_add(bw_add(bw_mul(bw_int_to_fixed(2), vbios->mcifwrmc_urgent_latency), data->dmif_burst_time[i][j]), data->mcifwr_burst_time[data->y_clk_level][data->sclk_level])), data->dispclk), bw_int_to_fixed(data->bytes_per_pixel[k])), data->lines_interleaved_in_mem_access[k]), data->latency_hiding_lines[k]), data->adjusted_data_buffer_size[k]))), (bw_sub(bw_div(bw_mul(bw_mul(data->dispclk, bw_int_to_fixed(data->bytes_per_pixel[k])), data->lines_interleaved_in_mem_access[k]), data->latency_hiding_lines[k]), bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k])))));
+					data->blackout_recovery_time = bw_max2(data->blackout_recovery_time, bw_div((bw_add(bw_mul(bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k]), vbios->blackout_duration), bw_sub(bw_div(bw_mul(bw_mul(bw_mul((bw_add(bw_add(bw_mul(bw_int_to_fixed(2), vbios->mcifwrmc_urgent_latency), data->dmif_burst_time[data->y_clk_level][data->sclk_level]), data->mcifwr_burst_time[data->y_clk_level][data->sclk_level])), data->dispclk), bw_int_to_fixed(data->bytes_per_pixel[k])), data->lines_interleaved_in_mem_access[k]), data->latency_hiding_lines[k]), data->adjusted_data_buffer_size[k]))), (bw_sub(bw_div(bw_mul(bw_mul(data->dispclk, bw_int_to_fixed(data->bytes_per_pixel[k])), data->lines_interleaved_in_mem_access[k]), data->latency_hiding_lines[k]), bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k])))));
 				}
 			}
 		}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index bd53d27e5414..f552b0468186 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1834,11 +1834,10 @@ void resource_build_info_frame(struct pipe_ctx *pipe_ctx)
 		set_vendor_info_packet(
 			pipe_ctx->stream, &info_frame.vendor_info_packet);
 		set_spd_info_packet(pipe_ctx->stream, &info_frame.spd_packet);
-	}
-
-	else if (dc_is_dp_signal(signal))
+	} else if (dc_is_dp_signal(signal)) {
 		set_vsc_info_packet(pipe_ctx->stream, &info_frame.vsc_packet);
 		set_spd_info_packet(pipe_ctx->stream, &info_frame.spd_packet);
+	}
 
 	translate_info_frame(&info_frame,
 			&pipe_ctx->encoder_info_frame);
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
index 80ac5d9efa71..3d1c32122d69 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
@@ -465,7 +465,6 @@ static uint32_t dce110_get_pix_clk_dividers_helper (
 		struct pll_settings *pll_settings,
 		struct pixel_clk_params *pix_clk_params)
 {
-	uint32_t addr = 0;
 	uint32_t value = 0;
 	uint32_t field = 0;
 	uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
@@ -731,8 +730,6 @@ static void dce110_program_pixel_clk_resync(
 		enum signal_type signal_type,
 		enum dc_color_depth colordepth)
 {
-	uint32_t value = 0;
-
 	REG_UPDATE(RESYNC_CNTL,
 			DCCG_DEEP_COLOR_CNTL1, 0);
 	/*
@@ -772,8 +769,6 @@ static void dce112_program_pixel_clk_resync(
 		enum dc_color_depth colordepth,
 		bool enable_ycbcr420)
 {
-	uint32_t value = 0;
-
 	REG_UPDATE(PIXCLK_RESYNC_CNTL,
 			PHYPLLA_DCCG_DEEP_COLOR_CNTL, 0);
 	/*
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c
index 8e2519b1c9df..262612061c68 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c
@@ -148,29 +148,6 @@ static int dce_divider_range_calc_divider(
 
 }
 
-static int dce_divider_range_calc_did(
-	struct dce_divider_range *div_range,
-	int div)
-{
-	int did;
-	/* Check before dividing.*/
-	if (div_range->div_range_step == 0) {
-		div_range->div_range_step = 1;
-		/*div_range_step cannot be zero*/
-		BREAK_TO_DEBUGGER();
-	}
-	/* Is this divider within our range?*/
-	if ((div < div_range->div_range_start)
-		|| (div >= div_range->div_range_end))
-		return INVALID_DID;
-/* did = (divider - range_start + (range_step-1)) / range_step) + did_min*/
-	did = div - div_range->div_range_start;
-	did += div_range->div_range_step - 1;
-	did /= div_range->div_range_step;
-	did += div_range->did_min;
-	return did;
-}
-
 static int dce_divider_range_get_divider(
 	struct dce_divider_range *div_range,
 	int ranges_num,
@@ -189,24 +166,6 @@ static int dce_divider_range_get_divider(
 	return div;
 }
 
-static int dce_divider_range_get_did(
-	struct dce_divider_range *div_range,
-	int ranges_num,
-	int divider)
-{
-	int did = INVALID_DID;
-	int i;
-
-	for (i = 0; i < ranges_num; i++) {
-		/*  CalcDid returns InvalidDid if a divider ID isn't found*/
-		did = dce_divider_range_calc_did(&div_range[i], divider);
-		/* Found a valid return did*/
-		if (did != INVALID_DID)
-			break;
-	}
-	return did;
-}
-
 static int dce_clocks_get_dp_ref_freq(struct display_clock *clk)
 {
 	struct dce_disp_clk *clk_dce = TO_DCE_CLOCKS(clk);
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
index f47b6617f662..bbf4d97cb980 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
@@ -83,8 +83,6 @@ static bool setup_scaling_configuration(
 	struct dce_transform *xfm_dce,
 	const struct scaler_data *data)
 {
-	struct dc_context *ctx = xfm_dce->base.ctx;
-
 	if (data->taps.h_taps + data->taps.v_taps <= 2) {
 		/* Set bypass */
 		REG_UPDATE_2(SCL_MODE, SCL_MODE, 0, SCL_PSCL_EN, 0);
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_transform_v.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_transform_v.c
index 7d8cf7a58f46..feb5f3c29804 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_transform_v.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_transform_v.c
@@ -621,7 +621,8 @@ static void dce110_xfmv_set_pixel_storage_depth(
 	const struct bit_depth_reduction_params *bit_depth_params)
 {
 	struct dce_transform *xfm_dce = TO_DCE_TRANSFORM(xfm);
-	int pixel_depth, expan_mode;
+	int pixel_depth = 0;
+	int expan_mode = 0;
 	uint32_t reg_data = 0;
 
 	switch (depth) {