diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/805-display-0029-drm-imx-mhdp-Adjustment-core-rate-of-DP-TX-CTRL-for-.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/805-display-0029-drm-imx-mhdp-Adjustment-core-rate-of-DP-TX-CTRL-for-.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/805-display-0029-drm-imx-mhdp-Adjustment-core-rate-of-DP-TX-CTRL-for-.patch b/target/linux/layerscape/patches-5.4/805-display-0029-drm-imx-mhdp-Adjustment-core-rate-of-DP-TX-CTRL-for-.patch new file mode 100644 index 0000000000..443351fd52 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/805-display-0029-drm-imx-mhdp-Adjustment-core-rate-of-DP-TX-CTRL-for-.patch @@ -0,0 +1,59 @@ +From 4d5ce89b5a6faa347464221e4b674be46b951245 Mon Sep 17 00:00:00 2001 +From: Wen He <wen.he_1@nxp.com> +Date: Wed, 27 Nov 2019 18:24:11 +0800 +Subject: [PATCH] drm: imx: mhdp: Adjustment core rate of DP TX CTRL for + LS1028A + +This Display TX CTRL clock should be ACLK/4, update it to align with +the specification. + +Signed-off-by: Wen He <wen.he_1@nxp.com> +Reviewed-by: Sandor Yu <sandor.yu@nxp.com> +--- + drivers/gpu/drm/bridge/cadence/cdns-dp-core.c | 4 ++++ + drivers/gpu/drm/imx/cdn-mhdp-imx8qm.c | 3 +++ + include/drm/bridge/cdns-mhdp-common.h | 1 + + 3 files changed, 8 insertions(+) + +--- a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c ++++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c +@@ -435,6 +435,7 @@ static int __cdns_dp_probe(struct platfo + } + + mhdp->is_hpd = true; ++ mhdp->is_ls1028a = false; + + mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in"); + if (mhdp->irq[IRQ_IN] < 0) { +@@ -450,6 +451,9 @@ static int __cdns_dp_probe(struct platfo + + cdns_dp_parse_dt(mhdp); + ++ if (of_device_is_compatible(dev->of_node, "cdn,ls1028a-dp")) ++ mhdp->is_ls1028a = true; ++ + cdns_mhdp_plat_call(mhdp, power_on); + + cdns_mhdp_plat_call(mhdp, firmware_init); +--- a/drivers/gpu/drm/imx/cdn-mhdp-imx8qm.c ++++ b/drivers/gpu/drm/imx/cdn-mhdp-imx8qm.c +@@ -526,6 +526,9 @@ int cdns_mhdp_firmware_init_imx8qm(struc + + /* configure HDMI/DP core clock */ + rate = clk_get_rate(imx_mhdp->clks.clk_core); ++ if (mhdp->is_ls1028a) ++ rate = rate / 4; ++ + cdns_mhdp_set_fw_clk(&imx_mhdp->mhdp, rate); + + /* un-reset ucpu */ +--- a/include/drm/bridge/cdns-mhdp-common.h ++++ b/include/drm/bridge/cdns-mhdp-common.h +@@ -685,6 +685,7 @@ struct cdns_mhdp_device { + bool power_up; + bool plugged; + bool is_hpd; ++ bool is_ls1028a; + struct mutex lock; + struct mutex iolock; + |