linux-kernel - [PATCH v2] drm/rockchip: vop2: fix rk3588 dp+dsi maxclk verification

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Message-ID: <20241115151131.416830-1-heiko@sntech.de>
Date: Fri, 15 Nov 2024 16:11:31 +0100
From: Heiko Stuebner <heiko@...ech.de>
To: heiko@...ech.de
Cc: quentin.schulz@...obroma-systems.com,
	hjc@...k-chips.com,
	andy.yan@...k-chips.com,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	sebastian.reichel@...labora.com,
	Heiko Stuebner <heiko.stuebner@...rry.de>,
	Quentin Schulz <quentin.schulz@...rry.de>,
	Andy Yan <andyshrk@....com>
Subject: [PATCH v2] drm/rockchip: vop2: fix rk3588 dp+dsi maxclk verification

From: Heiko Stuebner <heiko.stuebner@...rry.de>

The clock is in Hz while the value checked against is in kHz, so
actual frequencies will never be able to be below to max value.
Fix this by specifying the max-value in Hz too.

Fixes: 5a028e8f062f ("drm/rockchip: vop2: Add support for rk3588")
Signed-off-by: Heiko Stuebner <heiko.stuebner@...rry.de>
Reviewed-by: Quentin Schulz <quentin.schulz@...rry.de>
Acked-by: Andy Yan<andyshrk@....com>
---
changes in v2:
- drop the separate vp3-config patch, as vp3 will always get the leftover
  resources, so _should_ be fine (Andy)
- fix error output to also report Hz for the value in Hz (Quentin)
- add received Reviews+Acks

 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 9ad025aa9ab0..0c8ec7220fbe 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -1864,9 +1864,9 @@ static unsigned long rk3588_calc_cru_cfg(struct vop2_video_port *vp, int id,
 		else
 			dclk_out_rate = v_pixclk >> 2;
 
-		dclk_rate = rk3588_calc_dclk(dclk_out_rate, 600000);
+		dclk_rate = rk3588_calc_dclk(dclk_out_rate, 600000000);
 		if (!dclk_rate) {
-			drm_err(vop2->drm, "DP dclk_out_rate out of range, dclk_out_rate: %ld KHZ\n",
+			drm_err(vop2->drm, "DP dclk_out_rate out of range, dclk_out_rate: %ld Hz\n",
 				dclk_out_rate);
 			return 0;
 		}
@@ -1881,9 +1881,9 @@ static unsigned long rk3588_calc_cru_cfg(struct vop2_video_port *vp, int id,
 		 * dclk_rate = N * dclk_core_rate N = (1,2,4 ),
 		 * we get a little factor here
 		 */
-		dclk_rate = rk3588_calc_dclk(dclk_out_rate, 600000);
+		dclk_rate = rk3588_calc_dclk(dclk_out_rate, 600000000);
 		if (!dclk_rate) {
-			drm_err(vop2->drm, "MIPI dclk out of range, dclk_out_rate: %ld KHZ\n",
+			drm_err(vop2->drm, "MIPI dclk out of range, dclk_out_rate: %ld Hz\n",
 				dclk_out_rate);
 			return 0;
 		}
-- 
2.45.2