[PATCH v2 0/3] clk: qcom: dispcc-sm8650: round of fixes

[PATCH v2 0/3] clk: qcom: dispcc-sm8650: round of fixes

[Neil Armstrong]

While trying to fix a crash when display is started late in the
boot process, I ran on multiple issues with the DISPCC clock
definitions that needed some fixups.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
Changes in v2:
- Squashed patch 2 into patch 1
- Dropped shared_ops to disp_cc_sleep_clk_src & disp_cc_xo_clk_src as Taniya recommends
- Dropped patch 3
- Removed  wait_val fields updates from GDSC, this requires a larger solution
- Link to v1: https://lore.kernel.org/r/20240621-topic-sm8650-upstream-fix-dispcc-v1-0-7b297dd9fcc1@linaro.org

---
Neil Armstrong (3):
      clk: qcom: dispcc-sm8650: Park RCG's clk source at XO during disable
      clk: qcom: dispcc-sm8650: add missing CLK_SET_RATE_PARENT flag
      clk: qcom: dispcc-sm8650: Update the GDSC flags

 drivers/clk/qcom/dispcc-sm8650.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)
---
base-commit: b992b79ca8bc336fa8e2c80990b5af80ed8f36fd
change-id: 20240621-topic-sm8650-upstream-fix-dispcc-a1994038c003

Best regards,
-- 
Neil Armstrong <neil.armstrong@linaro.org>

[PATCH v2 1/3] clk: qcom: dispcc-sm8650: Park RCG's clk source at XO during disable

[Neil Armstrong]

The RCG's clk src has to be parked at XO while disabling as per the
HW recommendation, hence use clk_rcg2_shared_ops to achieve the same.

It also changes dptx1_aux_clk_src to use the correct ops instead of
clk_dp_ops.

Fixes: 9e939f008338 ("clk: qcom: add the SM8650 Display Clock Controller driver")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/clk/qcom/dispcc-sm8650.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/qcom/dispcc-sm8650.c b/drivers/clk/qcom/dispcc-sm8650.c
index c9d2751f5cb8..360b80377ed6 100644
--- a/drivers/clk/qcom/dispcc-sm8650.c
+++ b/drivers/clk/qcom/dispcc-sm8650.c
@@ -339,7 +339,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx0_aux_clk_src = {
 		.parent_data = disp_cc_parent_data_0,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 
@@ -398,7 +398,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx1_aux_clk_src = {
 		.parent_data = disp_cc_parent_data_0,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_dp_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 
@@ -457,7 +457,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx2_aux_clk_src = {
 		.parent_data = disp_cc_parent_data_0,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 
@@ -516,7 +516,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx3_aux_clk_src = {
 		.parent_data = disp_cc_parent_data_0,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 
@@ -560,7 +560,7 @@ static struct clk_rcg2 disp_cc_mdss_esc0_clk_src = {
 		.parent_data = disp_cc_parent_data_5,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 
@@ -575,7 +575,7 @@ static struct clk_rcg2 disp_cc_mdss_esc1_clk_src = {
 		.parent_data = disp_cc_parent_data_5,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 
@@ -647,7 +647,7 @@ static struct clk_rcg2 disp_cc_mdss_vsync_clk_src = {
 		.parent_data = disp_cc_parent_data_0,
 		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
 		.flags = CLK_SET_RATE_PARENT,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_shared_ops,
 	},
 };
 

-- 
2.34.1

[PATCH v2 2/3] clk: qcom: dispcc-sm8650: add missing CLK_SET_RATE_PARENT flag

[Neil Armstrong]

Add the missing CLK_SET_RATE_PARENT for the byte0_div_clk_src
and byte1_div_clk_src, the clock rate should propagate to
the corresponding _clk_src.

Fixes: 9e939f008338 ("clk: qcom: add the SM8650 Display Clock Controller driver")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/clk/qcom/dispcc-sm8650.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/qcom/dispcc-sm8650.c b/drivers/clk/qcom/dispcc-sm8650.c
index 360b80377ed6..1222a26c45c8 100644
--- a/drivers/clk/qcom/dispcc-sm8650.c
+++ b/drivers/clk/qcom/dispcc-sm8650.c
@@ -696,6 +696,7 @@ static struct clk_regmap_div disp_cc_mdss_byte0_div_clk_src = {
 			&disp_cc_mdss_byte0_clk_src.clkr.hw,
 		},
 		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
 		.ops = &clk_regmap_div_ops,
 	},
 };
@@ -710,6 +711,7 @@ static struct clk_regmap_div disp_cc_mdss_byte1_div_clk_src = {
 			&disp_cc_mdss_byte1_clk_src.clkr.hw,
 		},
 		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
 		.ops = &clk_regmap_div_ops,
 	},
 };

-- 
2.34.1

[PATCH v2 3/3] clk: qcom: dispcc-sm8650: Update the GDSC flags

[Neil Armstrong]

Update the GDSC flags by adding missing POLL_CFG_GDSCR flag.

Fixes: 9e939f008338 ("clk: qcom: add the SM8650 Display Clock Controller driver")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/clk/qcom/dispcc-sm8650.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/dispcc-sm8650.c b/drivers/clk/qcom/dispcc-sm8650.c
index 1222a26c45c8..85d8809e31e7 100644
--- a/drivers/clk/qcom/dispcc-sm8650.c
+++ b/drivers/clk/qcom/dispcc-sm8650.c
@@ -1610,7 +1610,7 @@ static struct gdsc mdss_gdsc = {
 		.name = "mdss_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = HW_CTRL | RETAIN_FF_ENABLE,
+	.flags = POLL_CFG_GDSCR | HW_CTRL | RETAIN_FF_ENABLE,
 };
 
 static struct gdsc mdss_int2_gdsc = {
@@ -1619,7 +1619,7 @@ static struct gdsc mdss_int2_gdsc = {
 		.name = "mdss_int2_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = HW_CTRL | RETAIN_FF_ENABLE,
+	.flags = POLL_CFG_GDSCR | HW_CTRL | RETAIN_FF_ENABLE,
 };
 
 static struct clk_regmap *disp_cc_sm8650_clocks[] = {

-- 
2.34.1

Re: [PATCH v2 1/3] clk: qcom: dispcc-sm8650: Park RCG's clk source at XO during disable

[Dmitry Baryshkov]

On Mon, Jun 24, 2024 at 10:05:50AM GMT, Neil Armstrong wrote:
> The RCG's clk src has to be parked at XO while disabling as per the
> HW recommendation, hence use clk_rcg2_shared_ops to achieve the same.
> 
> It also changes dptx1_aux_clk_src to use the correct ops instead of
> clk_dp_ops.
> 
> Fixes: 9e939f008338 ("clk: qcom: add the SM8650 Display Clock Controller driver")
> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
> ---
>  drivers/clk/qcom/dispcc-sm8650.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/clk/qcom/dispcc-sm8650.c b/drivers/clk/qcom/dispcc-sm8650.c
> index c9d2751f5cb8..360b80377ed6 100644
> --- a/drivers/clk/qcom/dispcc-sm8650.c
> +++ b/drivers/clk/qcom/dispcc-sm8650.c
> @@ -339,7 +339,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx0_aux_clk_src = {
>  		.parent_data = disp_cc_parent_data_0,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_rcg2_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };
>  
> @@ -398,7 +398,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx1_aux_clk_src = {
>  		.parent_data = disp_cc_parent_data_0,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_dp_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };
>  
> @@ -457,7 +457,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx2_aux_clk_src = {
>  		.parent_data = disp_cc_parent_data_0,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_rcg2_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };
>  
> @@ -516,7 +516,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx3_aux_clk_src = {
>  		.parent_data = disp_cc_parent_data_0,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_rcg2_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };

The only parent for these three clocks is the DT_BI_TCXO. Is this really
going to work as expected? Also what's the point of parking the
TCXO-sourced clocks?

>  
> @@ -560,7 +560,7 @@ static struct clk_rcg2 disp_cc_mdss_esc0_clk_src = {
>  		.parent_data = disp_cc_parent_data_5,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_rcg2_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };
>  
> @@ -575,7 +575,7 @@ static struct clk_rcg2 disp_cc_mdss_esc1_clk_src = {
>  		.parent_data = disp_cc_parent_data_5,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_rcg2_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };
>  
> @@ -647,7 +647,7 @@ static struct clk_rcg2 disp_cc_mdss_vsync_clk_src = {
>  		.parent_data = disp_cc_parent_data_0,
>  		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>  		.flags = CLK_SET_RATE_PARENT,
> -		.ops = &clk_rcg2_ops,
> +		.ops = &clk_rcg2_shared_ops,
>  	},
>  };
>  
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry

Re: [PATCH v2 3/3] clk: qcom: dispcc-sm8650: Update the GDSC flags

[Dmitry Baryshkov]

On Mon, Jun 24, 2024 at 10:05:52AM GMT, Neil Armstrong wrote:
> Update the GDSC flags by adding missing POLL_CFG_GDSCR flag.
> 
> Fixes: 9e939f008338 ("clk: qcom: add the SM8650 Display Clock Controller driver")
> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
> ---
>  drivers/clk/qcom/dispcc-sm8650.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

-- 
With best wishes
Dmitry

Re: [PATCH v2 1/3] clk: qcom: dispcc-sm8650: Park RCG's clk source at XO during disable

[Neil Armstrong]

On 24/06/2024 11:25, Dmitry Baryshkov wrote:
> On Mon, Jun 24, 2024 at 10:05:50AM GMT, Neil Armstrong wrote:
>> The RCG's clk src has to be parked at XO while disabling as per the
>> HW recommendation, hence use clk_rcg2_shared_ops to achieve the same.
>>
>> It also changes dptx1_aux_clk_src to use the correct ops instead of
>> clk_dp_ops.
>>
>> Fixes: 9e939f008338 ("clk: qcom: add the SM8650 Display Clock Controller driver")
>> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
>> ---
>>   drivers/clk/qcom/dispcc-sm8650.c | 14 +++++++-------
>>   1 file changed, 7 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/clk/qcom/dispcc-sm8650.c b/drivers/clk/qcom/dispcc-sm8650.c
>> index c9d2751f5cb8..360b80377ed6 100644
>> --- a/drivers/clk/qcom/dispcc-sm8650.c
>> +++ b/drivers/clk/qcom/dispcc-sm8650.c
>> @@ -339,7 +339,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx0_aux_clk_src = {
>>   		.parent_data = disp_cc_parent_data_0,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_rcg2_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
>>   
>> @@ -398,7 +398,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx1_aux_clk_src = {
>>   		.parent_data = disp_cc_parent_data_0,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_dp_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
>>   
>> @@ -457,7 +457,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx2_aux_clk_src = {
>>   		.parent_data = disp_cc_parent_data_0,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_rcg2_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
>>   
>> @@ -516,7 +516,7 @@ static struct clk_rcg2 disp_cc_mdss_dptx3_aux_clk_src = {
>>   		.parent_data = disp_cc_parent_data_0,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_rcg2_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
> 
> The only parent for these three clocks is the DT_BI_TCXO. Is this really
> going to work as expected? Also what's the point of parking the
> TCXO-sourced clocks?
> 

Indeed will drop

Thanks,
Neil

>>   
>> @@ -560,7 +560,7 @@ static struct clk_rcg2 disp_cc_mdss_esc0_clk_src = {
>>   		.parent_data = disp_cc_parent_data_5,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_rcg2_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
>>   
>> @@ -575,7 +575,7 @@ static struct clk_rcg2 disp_cc_mdss_esc1_clk_src = {
>>   		.parent_data = disp_cc_parent_data_5,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_rcg2_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
>>   
>> @@ -647,7 +647,7 @@ static struct clk_rcg2 disp_cc_mdss_vsync_clk_src = {
>>   		.parent_data = disp_cc_parent_data_0,
>>   		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
>>   		.flags = CLK_SET_RATE_PARENT,
>> -		.ops = &clk_rcg2_ops,
>> +		.ops = &clk_rcg2_shared_ops,
>>   	},
>>   };
>>   
>>
>> -- 
>> 2.34.1
>>
>