Re: [PATCH 2/2] clk: qcom: dispcc-sdm845: park disp_cc_mdss_mdp_clk_src
From: Bjorn Andersson <hidden>
Date: 2021-12-09 18:39:18
Also in:
linux-arm-msm
On Tue 07 Dec 18:22 PST 2021, Dmitry Baryshkov wrote:
quoted hunk ↗ jump to hunk
To stop disp_cc_mdss_mdp_clk_src from getting stuck during boot if it was enabled by the bootloader, part it to the TCXO clock source. Signed-off-by: Dmitry Baryshkov <redacted> --- drivers/clk/qcom/dispcc-sdm845.c | 3 +++ 1 file changed, 3 insertions(+)diff --git a/drivers/clk/qcom/dispcc-sdm845.c b/drivers/clk/qcom/dispcc-sdm845.c index 735adfefc379..f2afbba7bc72 100644 --- a/drivers/clk/qcom/dispcc-sdm845.c +++ b/drivers/clk/qcom/dispcc-sdm845.c@@ -858,6 +858,9 @@ static int disp_cc_sdm845_probe(struct platform_device *pdev) clk_fabia_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config); + /* Park disp_cc_mdss_mdp_clk_src */ + clk_rcg2_park_safely(regmap, 0x2088, 0);
Today booting the system with "clk_ignore_unused" will give you a working efifb up until the point where the display driver kicks in and reinitializes the hardware state - which during development might be indefinite. If we blindly cut the mdp_clk_src here that will no longer be possible. Regards, Bjorn
+ /* Enable hardware clock gating for DSI and MDP clocks */ regmap_update_bits(regmap, 0x8000, 0x7f0, 0x7f0); -- 2.33.0