Re: [RFC WIP PATCH] venus: add qcom,no-low-power property

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On 27/02/2024 07:55, Vikash Garodia wrote:

> On 2/26/2024 9:25 PM, Marc Gonzalez wrote:
>
>> Errr, there is currently no existing node for msm8998-venus?
>
> My bad, i meant your initial node msm8998-venus, without migrating to v2.
>
>> With the proposed node above (based on msm8996-venus)
>> AND the proposed work-around disabling low-power mode,
>> decoding works correctly.
>
> Nice, lets fix the work-around part before migrating to v2. Could you share the
> configurations for VIDEO_SUBCORE0_GDSC and VIDEO_SUBCORE1_GDSC ?
> 
> If we see vendor code[1], sys power plane control is very much supported, so
> ideally we should get it working without the workaround
> [1] https://git.codelinaro.org/clo/la/kernel/msm-4.4/-/blob/caf_migration/kernel.lnx.4.4.r38-rel/drivers/media/platform/msm/vidc/venus_hfi.c#L2223

OK, for easy reference, here are the proposed changes again:

diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
index 2793cc22d381a..5084191be1446 100644
--- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
@@ -3000,6 +3000,56 @@ mdss_dsi1_phy: phy@c996400 {
 			};
 		};
 
+		venus: video-codec@cc00000 {
+			compatible = "qcom,msm8998-venus";
+			reg = <0x0cc00000 0xff000>;
+			interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
+			power-domains = <&mmcc VIDEO_TOP_GDSC>;
+			clocks = <&mmcc VIDEO_CORE_CLK>,
+				 <&mmcc VIDEO_AHB_CLK>,
+				 <&mmcc VIDEO_AXI_CLK>,
+				 <&mmcc VIDEO_MAXI_CLK>;
+			clock-names = "core", "iface", "bus", "mbus";
+			iommus = <&mmss_smmu 0x400>,
+				 <&mmss_smmu 0x401>,
+				 <&mmss_smmu 0x40a>,
+				 <&mmss_smmu 0x407>,
+				 <&mmss_smmu 0x40e>,
+				 <&mmss_smmu 0x40f>,
+				 <&mmss_smmu 0x408>,
+				 <&mmss_smmu 0x409>,
+				 <&mmss_smmu 0x40b>,
+				 <&mmss_smmu 0x40c>,
+				 <&mmss_smmu 0x40d>,
+				 <&mmss_smmu 0x410>,
+				 <&mmss_smmu 0x411>,
+				 <&mmss_smmu 0x421>,
+				 <&mmss_smmu 0x428>,
+				 <&mmss_smmu 0x429>,
+				 <&mmss_smmu 0x42b>,
+				 <&mmss_smmu 0x42c>,
+				 <&mmss_smmu 0x42d>,
+				 <&mmss_smmu 0x411>,
+				 <&mmss_smmu 0x431>;
+			memory-region = <&venus_mem>;
+			status = "disabled";
+			qcom,venus-broken-low-power-mode;
+
+			video-decoder {
+				compatible = "venus-decoder";
+				clocks = <&mmcc VIDEO_SUBCORE0_CLK>;
+				clock-names = "core";
+				power-domains = <&mmcc VIDEO_SUBCORE0_GDSC>;
+			};
+
+			video-encoder {
+				compatible = "venus-encoder";
+				clocks = <&mmcc VIDEO_SUBCORE1_CLK>;
+				clock-names = "core";
+				power-domains = <&mmcc VIDEO_SUBCORE1_GDSC>;
+			};
+		};
+
 		mmss_smmu: iommu@cd00000 {
 			compatible = "qcom,msm8998-smmu-v2", "qcom,smmu-v2";
 			reg = <0x0cd00000 0x40000>;
diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index a712dd4f02a5b..ad1705e510312 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -585,6 +585,43 @@ static const struct venus_resources msm8996_res = {
 	.fwname = "qcom/venus-4.2/venus.mbn",
 };
 
+static const struct freq_tbl msm8998_freq_table[] = {
+	{ 1944000, 520000000 },	/* 4k UHD @ 60 (decode only) */
+	{  972000, 520000000 },	/* 4k UHD @ 30 */
+	{  489600, 346666667 },	/* 1080p @ 60 */
+	{  244800, 150000000 },	/* 1080p @ 30 */
+	{  108000,  75000000 },	/* 720p @ 30 */
+};
+
+static const struct reg_val msm8998_reg_preset[] = {
+    { 0x80124, 0x00000003 },
+    { 0x80550, 0x01111111 },
+    { 0x80560, 0x01111111 },
+    { 0x80568, 0x01111111 },
+    { 0x80570, 0x01111111 },
+    { 0x80580, 0x01111111 },
+    { 0xe2010, 0x00000000 },
+};
+
+static const struct venus_resources msm8998_res = {
+	.freq_tbl = msm8998_freq_table,
+	.freq_tbl_size = ARRAY_SIZE(msm8998_freq_table),
+	.reg_tbl = msm8998_reg_preset,
+	.reg_tbl_size = ARRAY_SIZE(msm8998_reg_preset),
+	.clks = {"core", "iface", "bus", "mbus"},
+	.clks_num = 4,
+	.vcodec0_clks = { "core" },
+	.vcodec1_clks = { "core" },
+	.vcodec_clks_num = 1,
+	.max_load = 2563200,
+	.hfi_version = HFI_VERSION_3XX,
+	.vmem_id = VIDC_RESOURCE_NONE,
+	.vmem_size = 0,
+	.vmem_addr = 0,
+	.dma_mask = 0xddc00000 - 1,
+	.fwname = "qcom/venus-4.4/venus.mbn",
+};
+
 static const struct freq_tbl sdm660_freq_table[] = {
 	{ 979200, 518400000 },
 	{ 489600, 441600000 },
@@ -891,6 +928,7 @@ static const struct venus_resources sc7280_res = {
 static const struct of_device_id venus_dt_match[] = {
 	{ .compatible = "qcom,msm8916-venus", .data = &msm8916_res, },
 	{ .compatible = "qcom,msm8996-venus", .data = &msm8996_res, },
+	{ .compatible = "qcom,msm8998-venus", .data = &msm8998_res, },
 	{ .compatible = "qcom,sdm660-venus", .data = &sdm660_res, },
 	{ .compatible = "qcom,sdm845-venus", .data = &sdm845_res, },
 	{ .compatible = "qcom,sdm845-venus-v2", .data = &sdm845_res_v2, },



This patch is on top of v6.8-rc1
so the configurations for VIDEO_SUBCOREx_GDSC
are as defined in mainline.

#define VIDEO_SUBCORE0_CLK_SRC	51
#define VIDEO_SUBCORE1_CLK_SRC	52

#define VIDEO_TOP_GDSC		1
#define VIDEO_SUBCORE0_GDSC	2
#define VIDEO_SUBCORE1_GDSC	3

https://github.com/torvalds/linux/blob/master/drivers/clk/qcom/mmcc-msm8998.c#L2536-L2561

static struct gdsc video_top_gdsc = {
	.gdscr = 0x1024,
	.pd = {
		.name = "video_top",
	},
	.pwrsts = PWRSTS_OFF_ON,
};

static struct gdsc video_subcore0_gdsc = {
	.gdscr = 0x1040,
	.pd = {
		.name = "video_subcore0",
	},
	.parent = &video_top_gdsc.pd,
	.pwrsts = PWRSTS_OFF_ON,
};

static struct gdsc video_subcore1_gdsc = {
	.gdscr = 0x1044,
	.pd = {
		.name = "video_subcore1",
	},
	.parent = &video_top_gdsc.pd,
	.pwrsts = PWRSTS_OFF_ON,
};


	const u8			pwrsts;
/* Powerdomain allowable state bitfields */
#define PWRSTS_OFF		BIT(0)
/*
 * There is no SW control to transition a GDSC into
 * PWRSTS_RET. This happens in HW when the parent
 * domain goes down to a low power state
 */
#define PWRSTS_RET		BIT(1)
#define PWRSTS_ON		BIT(2)
#define PWRSTS_OFF_ON		(PWRSTS_OFF | PWRSTS_ON)
#define PWRSTS_RET_ON		(PWRSTS_RET | PWRSTS_ON)
	const u16			flags;
#define VOTABLE		BIT(0)
#define CLAMP_IO	BIT(1)
#define HW_CTRL		BIT(2)
#define SW_RESET	BIT(3)
#define AON_RESET	BIT(4)
#define POLL_CFG_GDSCR	BIT(5)
#define ALWAYS_ON	BIT(6)
#define RETAIN_FF_ENABLE	BIT(7)
#define NO_RET_PERIPH	BIT(8)


Should .pwrsts be PWRSTS_RET_ON instead of PWRSTS_OFF_ON?

Should .flags be HW_CTRL instead of 0?


Regards





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