openwrt/target/linux/bcm27xx/patches-5.15/950-0434-drm-vc4-hdmi-Convert-to-the-new-clock-request-API.patch

From e2f73520b94f49c6ef3ae27e6dc899ec855567ab Mon Sep 17 00:00:00 2001
From: Dom Cobley <popcornmix@gmail.com>
Date: Tue, 13 Apr 2021 14:10:03 +0100
Subject: [PATCH] drm/vc4: hdmi: Convert to the new clock request API

The new clock request API allows us to increase the rate of the
core clock as required during mode set while decreasing it when
we're done, resulting in a better power-efficiency.

Signed-off-by: Dom Cobley <popcornmix@gmail.com>
---
 drivers/gpu/drm/vc4/vc4_kms.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -345,6 +345,7 @@ static void vc4_atomic_commit_tail(struc
 	struct drm_crtc *crtc;
 	struct vc4_hvs_state *old_hvs_state;
 	unsigned int channel;
+	struct clk_request *core_req;
 	int i;
 
 	old_hvs_state = vc4_hvs_get_old_global_state(state);
@@ -389,7 +390,7 @@ static void vc4_atomic_commit_tail(struc
 						500000000,
 						new_hvs_state->core_clock_rate);
 
-		clk_set_min_rate(hvs->core_clk, core_rate);
+		core_req = clk_request_start(hvs->core_clk, core_rate);
 	}
 
 	drm_atomic_helper_commit_modeset_disables(dev, state);
@@ -417,7 +418,7 @@ static void vc4_atomic_commit_tail(struc
 		drm_dbg(dev, "Running the core clock at %lu Hz\n",
 			new_hvs_state->core_clock_rate);
 
-		clk_set_min_rate(hvs->core_clk, new_hvs_state->core_clock_rate);
+		clk_request_done(core_req);
 	}
 }