target/linux/layerscape/patches-5.4/805-display-0029-drm-imx-mhdp-Adjustment-core-rate-of-DP-TX-CTRL-for-.patch

   1 From 4d5ce89b5a6faa347464221e4b674be46b951245 Mon Sep 17 00:00:00 2001
   2 From: Wen He <wen.he_1@nxp.com>
   3 Date: Wed, 27 Nov 2019 18:24:11 +0800
   4 Subject: [PATCH] drm: imx: mhdp: Adjustment core rate of DP TX CTRL for
   5  LS1028A
   6
   7 This Display TX CTRL clock should be ACLK/4, update it to align with
   8 the specification.
   9
  10 Signed-off-by: Wen He <wen.he_1@nxp.com>
  11 Reviewed-by: Sandor Yu <sandor.yu@nxp.com>
  12 ---
  13  drivers/gpu/drm/bridge/cadence/cdns-dp-core.c | 4 ++++
  14  drivers/gpu/drm/imx/cdn-mhdp-imx8qm.c         | 3 +++
  15  include/drm/bridge/cdns-mhdp-common.h         | 1 +
  16  3 files changed, 8 insertions(+)
  17
  18 --- a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
  19 +++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
  20 @@ -435,6 +435,7 @@ static int __cdns_dp_probe(struct platfo
  21         }
  22
  23         mhdp->is_hpd = true;
  24 +       mhdp->is_ls1028a = false;
  25
  26         mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in");
  27         if (mhdp->irq[IRQ_IN] < 0) {
  28 @@ -450,6 +451,9 @@ static int __cdns_dp_probe(struct platfo
  29
  30         cdns_dp_parse_dt(mhdp);
  31
  32 +       if (of_device_is_compatible(dev->of_node, "cdn,ls1028a-dp"))
  33 +               mhdp->is_ls1028a = true;
  34 +
  35         cdns_mhdp_plat_call(mhdp, power_on);
  36
  37         cdns_mhdp_plat_call(mhdp, firmware_init);
  38 --- a/drivers/gpu/drm/imx/cdn-mhdp-imx8qm.c
  39 +++ b/drivers/gpu/drm/imx/cdn-mhdp-imx8qm.c
  40 @@ -526,6 +526,9 @@ int cdns_mhdp_firmware_init_imx8qm(struc
  41
  42         /* configure HDMI/DP core clock */
  43         rate = clk_get_rate(imx_mhdp->clks.clk_core);
  44 +       if (mhdp->is_ls1028a)
  45 +               rate = rate / 4;
  46 +
  47         cdns_mhdp_set_fw_clk(&imx_mhdp->mhdp, rate);
  48
  49         /* un-reset ucpu */
  50 --- a/include/drm/bridge/cdns-mhdp-common.h
  51 +++ b/include/drm/bridge/cdns-mhdp-common.h
  52 @@ -685,6 +685,7 @@ struct cdns_mhdp_device {
  53         bool power_up;
  54         bool plugged;
  55         bool is_hpd;
  56 +       bool is_ls1028a;
  57         struct mutex lock;
  58         struct mutex iolock;
  59