[PATCH 0/3] Add check for max clock rate in mode_valid

[PATCH 0/3] Add check for max clock rate in mode_valid

[Jitao Shi]

Jitao Shi (3):
  drm/mediatek: mtk_dpi: Add check for max clock rate in mode_valid
  drm/mediatek: mtk_dpi: Add dpi config for mt8192
  dt-bindings: mediatek,dpi: add mt8192 to mediatek,dpi

 .../display/mediatek/mediatek,dpi.yaml        |  1 +
 drivers/gpu/drm/mediatek/mtk_dpi.c            | 27 +++++++++++++++++++
 2 files changed, 28 insertions(+)

-- 
2.25.1

[PATCH 1/3] drm/mediatek: mtk_dpi: Add check for max clock rate in mode_valid

[Jitao Shi]

Add per-platform max clock rate check in mtk_dpi_bridge_mode_valid.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 52f11a63a330..ffa4a0f1989f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -118,6 +118,7 @@ struct mtk_dpi_yc_limit {
 struct mtk_dpi_conf {
 	unsigned int (*cal_factor)(int clock);
 	u32 reg_h_fre_con;
+	u32 max_clock_khz;
 	bool edge_sel_en;
 };
 
@@ -555,9 +556,22 @@ static void mtk_dpi_bridge_enable(struct drm_bridge *bridge)
 	mtk_dpi_set_display_mode(dpi, &dpi->mode);
 }
 
+static enum drm_mode_status
+mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
+			  const struct drm_display_mode *mode)
+{
+	struct mtk_dpi *dpi = bridge_to_dpi(bridge);
+
+	if (dpi->conf->max_clock_khz && mode->clock > dpi->conf->max_clock_khz)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
 static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
 	.attach = mtk_dpi_bridge_attach,
 	.mode_set = mtk_dpi_bridge_mode_set,
+	.mode_valid = mtk_dpi_bridge_mode_valid,
 	.disable = mtk_dpi_bridge_disable,
 	.enable = mtk_dpi_bridge_enable,
 };
@@ -673,17 +687,20 @@ static unsigned int mt8183_calculate_factor(int clock)
 static const struct mtk_dpi_conf mt8173_conf = {
 	.cal_factor = mt8173_calculate_factor,
 	.reg_h_fre_con = 0xe0,
+	.max_clock_khz = 300000,
 };
 
 static const struct mtk_dpi_conf mt2701_conf = {
 	.cal_factor = mt2701_calculate_factor,
 	.reg_h_fre_con = 0xb0,
 	.edge_sel_en = true,
+	.max_clock_khz = 150000,
 };
 
 static const struct mtk_dpi_conf mt8183_conf = {
 	.cal_factor = mt8183_calculate_factor,
 	.reg_h_fre_con = 0xe0,
+	.max_clock_khz = 100000,
 };
 
 static int mtk_dpi_probe(struct platform_device *pdev)
-- 
2.25.1

[PATCH 2/3] drm/mediatek: mtk_dpi: Add dpi config for mt8192

[Jitao Shi]

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index ffa4a0f1989f..b7905f3f4d1b 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -703,6 +703,13 @@ static const struct mtk_dpi_conf mt8183_conf = {
 	.max_clock_khz = 100000,
 };
 
+static const struct mtk_dpi_conf mt8192_conf = {
+	.cal_factor = mt8183_calculate_factor,
+	.reg_h_fre_con = 0xe0,
+	.dual_edge = true,
+	.max_clock_khz = 150000,
+};
+
 static int mtk_dpi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -837,6 +844,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
 	{ .compatible = "mediatek,mt8183-dpi",
 	  .data = &mt8183_conf,
 	},
+	{ .compatible = "mediatek,mt8192-dpi",
+	  .data = &mt8192_conf,
+	},
 	{ },
 };
 
-- 
2.25.1

[PATCH 3/3] dt-bindings: mediatek,dpi: add mt8192 to mediatek,dpi

[Jitao Shi]

Add compatible "mediatek,mt8192-dpi" for the mt8192 dpi.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
 .../devicetree/bindings/display/mediatek/mediatek,dpi.yaml       | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
index 6cdb734c91a9..2f566f19e6e0 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
@@ -22,6 +22,7 @@ properties:
       - mediatek,mt7623-dpi
       - mediatek,mt8173-dpi
       - mediatek,mt8183-dpi
+      - mediatek,mt8192-dpi
 
   reg:
     maxItems: 1
-- 
2.25.1

Re: [PATCH 2/3] drm/mediatek: mtk_dpi: Add dpi config for mt8192

[kernel test robot]

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Hi Jitao,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linux/master linus/master v5.11-rc6 next-20210125]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/094ecc22dd2d9bfee293b97b33ba267a861ee301
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121
        git checkout 094ecc22dd2d9bfee293b97b33ba267a861ee301
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: error: initialization of 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_info *, const struct drm_display_mode *)' from incompatible pointer type 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_mode *)' [-Werror=incompatible-pointer-types]
     574 |  .mode_valid = mtk_dpi_bridge_mode_valid,
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: note: (near initialization for 'mtk_dpi_bridge_funcs.mode_valid')
   drivers/gpu/drm/mediatek/mtk_dpi.c:709:3: error: 'const struct mtk_dpi_conf' has no member named 'dual_edge'
     709 |  .dual_edge = true,
         |   ^~~~~~~~~
>> drivers/gpu/drm/mediatek/mtk_dpi.c:710:19: warning: initialized field overwritten [-Woverride-init]
     710 |  .max_clock_khz = 150000,
         |                   ^~~~~~
   drivers/gpu/drm/mediatek/mtk_dpi.c:710:19: note: (near initialization for 'mt8192_conf.max_clock_khz')
   cc1: some warnings being treated as errors


vim +710 drivers/gpu/drm/mediatek/mtk_dpi.c

   705	
   706	static const struct mtk_dpi_conf mt8192_conf = {
   707		.cal_factor = mt8183_calculate_factor,
   708		.reg_h_fre_con = 0xe0,
   709		.dual_edge = true,
 > 710		.max_clock_khz = 150000,
   711	};
   712	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
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Re: [PATCH 1/3] drm/mediatek: mtk_dpi: Add check for max clock rate in mode_valid

[kernel test robot]

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Hi Jitao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on pza/reset/next linux/master linus/master v5.11-rc6 next-20210125]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/730e2bd7e5dd88d40a320cd8d74057a51a3d3395
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121
        git checkout 730e2bd7e5dd88d40a320cd8d74057a51a3d3395
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: error: initialization of 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_info *, const struct drm_display_mode *)' from incompatible pointer type 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_mode *)' [-Werror=incompatible-pointer-types]
     574 |  .mode_valid = mtk_dpi_bridge_mode_valid,
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: note: (near initialization for 'mtk_dpi_bridge_funcs.mode_valid')
   cc1: some warnings being treated as errors


vim +574 drivers/gpu/drm/mediatek/mtk_dpi.c

   570	
   571	static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
   572		.attach = mtk_dpi_bridge_attach,
   573		.mode_set = mtk_dpi_bridge_mode_set,
 > 574		.mode_valid = mtk_dpi_bridge_mode_valid,
   575		.disable = mtk_dpi_bridge_disable,
   576		.enable = mtk_dpi_bridge_enable,
   577	};
   578	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
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Re: [PATCH 2/3] drm/mediatek: mtk_dpi: Add dpi config for mt8192

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 7108 bytes --]

Hi Jitao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linux/master linus/master v5.11-rc6 next-20210125]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/094ecc22dd2d9bfee293b97b33ba267a861ee301
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121
        git checkout 094ecc22dd2d9bfee293b97b33ba267a861ee301
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

Note: the linux-review/Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210207-210121 HEAD 9361778ccbd0d19a6c7376b1f3489b6e5063bb73 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: error: initialization of 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_info *, const struct drm_display_mode *)' from incompatible pointer type 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_mode *)' [-Werror=incompatible-pointer-types]
     574 |  .mode_valid = mtk_dpi_bridge_mode_valid,
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: note: (near initialization for 'mtk_dpi_bridge_funcs.mode_valid')
>> drivers/gpu/drm/mediatek/mtk_dpi.c:709:3: error: 'const struct mtk_dpi_conf' has no member named 'dual_edge'
     709 |  .dual_edge = true,
         |   ^~~~~~~~~
   drivers/gpu/drm/mediatek/mtk_dpi.c:710:19: warning: initialized field overwritten [-Woverride-init]
     710 |  .max_clock_khz = 150000,
         |                   ^~~~~~
   drivers/gpu/drm/mediatek/mtk_dpi.c:710:19: note: (near initialization for 'mt8192_conf.max_clock_khz')
   cc1: some warnings being treated as errors


vim +709 drivers/gpu/drm/mediatek/mtk_dpi.c

   570	
   571	static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
   572		.attach = mtk_dpi_bridge_attach,
   573		.mode_set = mtk_dpi_bridge_mode_set,
 > 574		.mode_valid = mtk_dpi_bridge_mode_valid,
   575		.disable = mtk_dpi_bridge_disable,
   576		.enable = mtk_dpi_bridge_enable,
   577	};
   578	
   579	static void mtk_dpi_start(struct mtk_ddp_comp *comp)
   580	{
   581		struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
   582	
   583		mtk_dpi_power_on(dpi);
   584	}
   585	
   586	static void mtk_dpi_stop(struct mtk_ddp_comp *comp)
   587	{
   588		struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
   589	
   590		mtk_dpi_power_off(dpi);
   591	}
   592	
   593	static const struct mtk_ddp_comp_funcs mtk_dpi_funcs = {
   594		.start = mtk_dpi_start,
   595		.stop = mtk_dpi_stop,
   596	};
   597	
   598	static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
   599	{
   600		struct mtk_dpi *dpi = dev_get_drvdata(dev);
   601		struct drm_device *drm_dev = data;
   602		int ret;
   603	
   604		ret = mtk_ddp_comp_register(drm_dev, &dpi->ddp_comp);
   605		if (ret < 0) {
   606			dev_err(dev, "Failed to register component %pOF: %d\n",
   607				dev->of_node, ret);
   608			return ret;
   609		}
   610	
   611		ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
   612					      DRM_MODE_ENCODER_TMDS);
   613		if (ret) {
   614			dev_err(dev, "Failed to initialize decoder: %d\n", ret);
   615			goto err_unregister;
   616		}
   617	
   618		dpi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm_dev, dpi->ddp_comp);
   619	
   620		ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL, 0);
   621		if (ret) {
   622			dev_err(dev, "Failed to attach bridge: %d\n", ret);
   623			goto err_cleanup;
   624		}
   625	
   626		dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
   627		dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
   628		dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
   629		dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
   630	
   631		return 0;
   632	
   633	err_cleanup:
   634		drm_encoder_cleanup(&dpi->encoder);
   635	err_unregister:
   636		mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
   637		return ret;
   638	}
   639	
   640	static void mtk_dpi_unbind(struct device *dev, struct device *master,
   641				   void *data)
   642	{
   643		struct mtk_dpi *dpi = dev_get_drvdata(dev);
   644		struct drm_device *drm_dev = data;
   645	
   646		drm_encoder_cleanup(&dpi->encoder);
   647		mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
   648	}
   649	
   650	static const struct component_ops mtk_dpi_component_ops = {
   651		.bind = mtk_dpi_bind,
   652		.unbind = mtk_dpi_unbind,
   653	};
   654	
   655	static unsigned int mt8173_calculate_factor(int clock)
   656	{
   657		if (clock <= 27000)
   658			return 3 << 4;
   659		else if (clock <= 84000)
   660			return 3 << 3;
   661		else if (clock <= 167000)
   662			return 3 << 2;
   663		else
   664			return 3 << 1;
   665	}
   666	
   667	static unsigned int mt2701_calculate_factor(int clock)
   668	{
   669		if (clock <= 64000)
   670			return 4;
   671		else if (clock <= 128000)
   672			return 2;
   673		else
   674			return 1;
   675	}
   676	
   677	static unsigned int mt8183_calculate_factor(int clock)
   678	{
   679		if (clock <= 27000)
   680			return 8;
   681		else if (clock <= 167000)
   682			return 4;
   683		else
   684			return 2;
   685	}
   686	
   687	static const struct mtk_dpi_conf mt8173_conf = {
   688		.cal_factor = mt8173_calculate_factor,
   689		.reg_h_fre_con = 0xe0,
   690		.max_clock_khz = 300000,
   691	};
   692	
   693	static const struct mtk_dpi_conf mt2701_conf = {
   694		.cal_factor = mt2701_calculate_factor,
   695		.reg_h_fre_con = 0xb0,
   696		.edge_sel_en = true,
   697		.max_clock_khz = 150000,
   698	};
   699	
   700	static const struct mtk_dpi_conf mt8183_conf = {
   701		.cal_factor = mt8183_calculate_factor,
   702		.reg_h_fre_con = 0xe0,
   703		.max_clock_khz = 100000,
   704	};
   705	
   706	static const struct mtk_dpi_conf mt8192_conf = {
   707		.cal_factor = mt8183_calculate_factor,
   708		.reg_h_fre_con = 0xe0,
 > 709		.dual_edge = true,
   710		.max_clock_khz = 150000,
   711	};
   712	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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