drm/msm: reduce usage of round_pixclk callback

The round_pixclk() callback returns different rate only on MDP4 in HDMI
(DTV) case. Stop using this callback in other cases to simplify
mode_valid callbacks.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Link: https://lore.kernel.org/r/20220106070656.482882-1-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -774,12 +774,6 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
 	return ret;
 }
 
-static long dpu_kms_round_pixclk(struct msm_kms *kms, unsigned long rate,
-		struct drm_encoder *encoder)
-{
-	return rate;
-}
-
 static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 {
 	int i;
@@ -948,7 +942,6 @@ static const struct msm_kms_funcs kms_funcs = {
 	.disable_vblank  = dpu_kms_disable_vblank,
 	.check_modified_format = dpu_format_check_modified_format,
 	.get_format      = dpu_get_msm_format,
-	.round_pixclk    = dpu_kms_round_pixclk,
 	.destroy         = dpu_kms_destroy,
 	.snapshot        = dpu_kms_mdp_snapshot,
 #ifdef CONFIG_DEBUG_FS

drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c

@@ -190,12 +190,6 @@ static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
 		mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
 }
 
-static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
-		struct drm_encoder *encoder)
-{
-	return rate;
-}
-
 static int mdp5_set_split_display(struct msm_kms *kms,
 		struct drm_encoder *encoder,
 		struct drm_encoder *slave_encoder,
@@ -278,7 +272,6 @@ static const struct mdp_kms_funcs kms_funcs = {
 		.wait_flush      = mdp5_wait_flush,
 		.complete_commit = mdp5_complete_commit,
 		.get_format      = mdp_get_format,
-		.round_pixclk    = mdp5_round_pixclk,
 		.set_split_display = mdp5_set_split_display,
 		.destroy         = mdp5_kms_destroy,
 #ifdef CONFIG_DEBUG_FS

drivers/gpu/drm/msm/dsi/dsi_manager.c

@@ -305,27 +305,6 @@ static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 	return num;
 }
 
-static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
-				struct drm_display_mode *mode)
-{
-	int id = dsi_mgr_connector_get_id(connector);
-	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
-	struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
-	struct msm_drm_private *priv = connector->dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-	long actual, requested;
-
-	DBG("");
-	requested = 1000 * mode->clock;
-	actual = kms->funcs->round_pixclk(kms, requested, encoder);
-
-	DBG("requested=%ld, actual=%ld", requested, actual);
-	if (actual != requested)
-		return MODE_CLOCK_RANGE;
-
-	return MODE_OK;
-}
-
 static struct drm_encoder *
 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 {
@@ -586,7 +565,6 @@ static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 
 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 	.get_modes = dsi_mgr_connector_get_modes,
-	.mode_valid = dsi_mgr_connector_mode_valid,
 	.best_encoder = dsi_mgr_connector_best_encoder,
 };
 

drivers/gpu/drm/msm/hdmi/hdmi_bridge.c

@@ -282,15 +282,18 @@ static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge
 	long actual, requested;
 
 	requested = 1000 * mode->clock;
-	actual = kms->funcs->round_pixclk(kms,
-			requested, hdmi_bridge->hdmi->encoder);
 
 	/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
 	 * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
 	 * instead):
 	 */
-	if (config->pwr_clk_cnt > 0)
-		actual = clk_round_rate(hdmi->pwr_clks[0], actual);
+	if (kms->funcs->round_pixclk)
+		actual = kms->funcs->round_pixclk(kms,
+			requested, hdmi_bridge->hdmi->encoder);
+	else if (config->pwr_clk_cnt > 0)
+		actual = clk_round_rate(hdmi->pwr_clks[0], requested);
+	else
+		actual = requested;
 
 	DBG("requested=%ld, actual=%ld", requested, actual);