linux-kernel - [PATCH 11/49] staging: hikey9xx/gpu: Add support 10.1 inch special HDMI displays.

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Message-Id: <352fea9bd94aa12d603744f2b2f2de3fb297442f.1597833138.git.mchehab+huawei@kernel.org>
Date:   Wed, 19 Aug 2020 13:45:39 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Xiubin Zhang <zhangxiubin1@...wei.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Liwei Cai <cailiwei@...ilicon.com>,
        Wanchun Zheng <zhengwanchun@...ilicon.com>,
        Chen Feng <puck.chen@...ilicon.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 11/49] staging: hikey9xx/gpu: Add support 10.1 inch special HDMI displays.

From: Xiubin Zhang <zhangxiubin1@...wei.com>

Adjust pixel clock for compatibility with 10.1 inch special displays.

Signed-off-by: Xiubin Zhang <zhangxiubin1@...wei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/staging/hikey9xx/gpu/kirin_drm_dss.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/hikey9xx/gpu/kirin_drm_dss.c b/drivers/staging/hikey9xx/gpu/kirin_drm_dss.c
index 11d847e2da3d..693f5499c8d0 100644
--- a/drivers/staging/hikey9xx/gpu/kirin_drm_dss.c
+++ b/drivers/staging/hikey9xx/gpu/kirin_drm_dss.c
@@ -270,6 +270,10 @@ static void dss_ldi_set_mode(struct dss_crtc *acrtc)
 		else
 			clk_Hz = mode->clock * 1000UL;
 
+		/* Adjust pixel clock for compatibility with 10.1 inch special displays. */
+		if (mode->clock == 148500 && mode->width_mm == 532 && mode->height_mm == 299)
+			clk_Hz = 152000 * 1000UL;
+
 		DRM_INFO("HDMI real need clock = %llu \n", clk_Hz);
 		hdmi_pxl_ppll7_init(ctx, clk_Hz);
 		adj_mode->clock = clk_Hz / 1000;
-- 
2.26.2