drm/msm/dp: set stream_pixel rate directly

The only clock for which we set the rate is the "stream_pixel". Rather
than storing the rate and then setting it by looping over all the
clocks, set the clock rate directly.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/474714/
Link: https://lore.kernel.org/r/20220217055529.499829-4-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dp/dp_clk_util.c

@@ -51,39 +51,6 @@ int msm_dss_get_clk(struct device *dev, struct dss_clk *clk_arry, int num_clk)
 	return rc;
 }
 
-int msm_dss_clk_set_rate(struct dss_clk *clk_arry, int num_clk)
-{
-	int i, rc = 0;
-
-	for (i = 0; i < num_clk; i++) {
-		if (clk_arry[i].clk) {
-			if (clk_arry[i].type != DSS_CLK_AHB) {
-				DEV_DBG("%pS->%s: '%s' rate %ld\n",
-					__builtin_return_address(0), __func__,
-					clk_arry[i].clk_name,
-					clk_arry[i].rate);
-				rc = clk_set_rate(clk_arry[i].clk,
-					clk_arry[i].rate);
-				if (rc) {
-					DEV_ERR("%pS->%s: %s failed. rc=%d\n",
-						__builtin_return_address(0),
-						__func__,
-						clk_arry[i].clk_name, rc);
-					break;
-				}
-			}
-		} else {
-			DEV_ERR("%pS->%s: '%s' is not available\n",
-				__builtin_return_address(0), __func__,
-				clk_arry[i].clk_name);
-			rc = -EPERM;
-			break;
-		}
-	}
-
-	return rc;
-}
-
 int msm_dss_enable_clk(struct dss_clk *clk_arry, int num_clk, int enable)
 {
 	int i, rc = 0;

drivers/gpu/drm/msm/dp/dp_clk_util.h

@@ -13,17 +13,9 @@
 #define DEV_WARN(fmt, args...)  pr_warn(fmt, ##args)
 #define DEV_ERR(fmt, args...)   pr_err(fmt, ##args)
 
-enum dss_clk_type {
-	DSS_CLK_AHB, /* no set rate. rate controlled through rpm */
-	DSS_CLK_PCLK,
-};
-
 struct dss_clk {
 	struct clk *clk; /* clk handle */
 	char clk_name[32];
-	enum dss_clk_type type;
-	unsigned long rate;
-	unsigned long max_rate;
 };
 
 struct dss_module_power {
@@ -33,6 +25,5 @@ struct dss_module_power {
 
 int msm_dss_get_clk(struct device *dev, struct dss_clk *clk_arry, int num_clk);
 void msm_dss_put_clk(struct dss_clk *clk_arry, int num_clk);
-int msm_dss_clk_set_rate(struct dss_clk *clk_arry, int num_clk);
 int msm_dss_enable_clk(struct dss_clk *clk_arry, int num_clk, int enable);
 #endif /* __DP_CLK_UTIL_H__ */

drivers/gpu/drm/msm/dp/dp_ctrl.c

@@ -1332,7 +1332,7 @@ static void dp_ctrl_set_clock_rate(struct dp_ctrl_private *ctrl,
 						rate, name);
 
 	if (num)
-		cfg->rate = rate;
+		clk_set_rate(cfg->clk, rate);
 	else
 		DRM_ERROR("%s clock doesn't exit to set rate %lu\n",
 				name, rate);

drivers/gpu/drm/msm/dp/dp_parser.c

@@ -237,14 +237,12 @@ static int dp_parser_clock(struct dp_parser *parser)
 			struct dss_clk *clk =
 				&core_power->clk_config[core_clk_index];
 			strlcpy(clk->clk_name, clk_name, sizeof(clk->clk_name));
-			clk->type = DSS_CLK_AHB;
 			core_clk_index++;
 		} else if (dp_parser_check_prefix("stream", clk_name) &&
 				stream_clk_index < stream_clk_count) {
 			struct dss_clk *clk =
 				&stream_power->clk_config[stream_clk_index];
 			strlcpy(clk->clk_name, clk_name, sizeof(clk->clk_name));
-			clk->type = DSS_CLK_PCLK;
 			stream_clk_index++;
 		} else if (dp_parser_check_prefix("ctrl", clk_name) &&
 			   ctrl_clk_index < ctrl_clk_count) {
@@ -252,11 +250,6 @@ static int dp_parser_clock(struct dp_parser *parser)
 				&ctrl_power->clk_config[ctrl_clk_index];
 			strlcpy(clk->clk_name, clk_name, sizeof(clk->clk_name));
 			ctrl_clk_index++;
-			if (dp_parser_check_prefix("ctrl_link", clk_name) ||
-			    dp_parser_check_prefix("stream_pixel", clk_name))
-				clk->type = DSS_CLK_PCLK;
-			else
-				clk->type = DSS_CLK_AHB;
 		}
 	}
 

drivers/gpu/drm/msm/dp/dp_power.c

@@ -157,16 +157,6 @@ static int dp_power_clk_set_rate(struct dp_power_private *power,
 	int rc = 0;
 	struct dss_module_power *mp = &power->parser->mp[module];
 
-	if (module != DP_CTRL_PM) {
-		if (enable) {
-			rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk);
-			if (rc) {
-				DRM_ERROR("failed to set clks rate\n");
-				return rc;
-			}
-		}
-	}
-
 	rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, enable);
 	if (rc) {
 		DRM_ERROR("failed to %d clks, err: %d\n", enable, rc);