Re: [PATCH v5 2/7] drm/ingenic: Add support for JZ4780 and HDMI output

From: Paul Cercueil
Date: Tue Oct 05 2021 - 16:22:56 EST

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In reply to: H. Nikolaus Schaller: "[PATCH v5 2/7] drm/ingenic: Add support for JZ4780 and HDMI output"
Next in thread: H. Nikolaus Schaller: "[PATCH v5 3/7] dt-bindings: display: Add ingenic,jz4780-dw-hdmi DT Schema"
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Hi Nikolaus,

Le mar., oct. 5 2021 at 14:29:14 +0200, H. Nikolaus Schaller <hns@xxxxxxxxxxxxx> a écrit :

From: Paul Boddie <paul@xxxxxxxxxxxxx>

Add support for the LCD controller present on JZ4780 SoCs.
This SoC uses 8-byte descriptors which extend the current
4-byte descriptors used for other Ingenic SoCs.

Tested on MIPS Creator CI20 board.

Signed-off-by: Paul Boddie <paul@xxxxxxxxxxxxx>
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
---
drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 85 +++++++++++++++++++++--
drivers/gpu/drm/ingenic/ingenic-drm.h | 42 +++++++++++
2 files changed, 122 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index f73522bdacaa..e2df4b085905 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -6,6 +6,7 @@

#include "ingenic-drm.h"

+#include <linux/bitfield.h>
#include <linux/component.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
@@ -49,6 +50,11 @@ struct ingenic_dma_hwdesc {
u32 addr;
u32 id;
u32 cmd;
+ /* extended hw descriptor for jz4780 */
+ u32 offsize;
+ u32 pagewidth;
+ u32 cpos;
+ u32 dessize;
} __aligned(16);

struct ingenic_dma_hwdescs {
@@ -60,9 +66,11 @@ struct jz_soc_info {
bool needs_dev_clk;
bool has_osd;
bool map_noncoherent;
+ bool use_extended_hwdesc;
unsigned int max_width, max_height;
const u32 *formats_f0, *formats_f1;
unsigned int num_formats_f0, num_formats_f1;
+ unsigned int max_reg;
};

struct ingenic_drm_private_state {
@@ -168,12 +176,11 @@ static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg)
}
}

-static const struct regmap_config ingenic_drm_regmap_config = {
+static struct regmap_config ingenic_drm_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,

- .max_register = JZ_REG_LCD_SIZE1,
.writeable_reg = ingenic_drm_writeable_reg,
};

@@ -663,6 +670,37 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
hwdesc->cmd = JZ_LCD_CMD_EOF_IRQ | (width * height * cpp / 4);
hwdesc->next = dma_hwdesc_addr(priv, next_id);

+ if (priv->soc_info->use_extended_hwdesc) {
+ hwdesc->cmd |= JZ_LCD_CMD_FRM_ENABLE;
+
+ /* Extended 8-byte descriptor */
+ hwdesc->cpos = 0;
+ hwdesc->offsize = 0;
+ hwdesc->pagewidth = 0;
+
+ switch (newstate->fb->format->format) {
+ case DRM_FORMAT_XRGB1555:
+ hwdesc->cpos |= JZ_LCD_CPOS_RGB555;
+ fallthrough;
+ case DRM_FORMAT_RGB565:
+ hwdesc->cpos |= JZ_LCD_CPOS_BPP_15_16;
+ break;
+ case DRM_FORMAT_XRGB8888:
+ hwdesc->cpos |= JZ_LCD_CPOS_BPP_18_24;
+ break;
+ }
+ hwdesc->cpos |= JZ_LCD_CPOS_PREMULTIPLY_LCD |
+ (JZ_LCD_CPOS_COEFFICIENT_1_ALPHA1 <<
+ JZ_LCD_CPOS_COEFFICIENT_OFFSET);

Knowing that OSD mode doesn't really work with this patch, I doubt you need to configure per-plane alpha blending.

+
+ hwdesc->dessize =
+ (0xff << JZ_LCD_DESSIZE_ALPHA_OFFSET) |

Same here.

+ FIELD_PREP(JZ_LCD_DESSIZE_HEIGHT_MASK <<
+ JZ_LCD_DESSIZE_HEIGHT_OFFSET, height - 1) |
+ FIELD_PREP(JZ_LCD_DESSIZE_WIDTH_MASK <<
+ JZ_LCD_DESSIZE_WIDTH_OFFSET, width - 1);

Better pre-shift your *_MASK macros (and use GENMASK() in them) and remove the *_OFFSET macros.

+ }
+
if (drm_atomic_crtc_needs_modeset(crtc_state)) {
fourcc = newstate->fb->format->format;

@@ -694,6 +732,10 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
| JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE;
}

+ /* set use of the 8-word descriptor and OSD foreground usage. */

I think you can remove this comment - this code doesn't actually set OSD mode, but it does enable the use of the extended hardware descriptor format, and I think it is already self-explanatory.

+ if (priv->soc_info->use_extended_hwdesc)
+ cfg |= JZ_LCD_CFG_DESCRIPTOR_8;
+
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
@@ -1010,6 +1052,7 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)
struct drm_encoder *encoder;
struct ingenic_drm_bridge *ib;
struct drm_device *drm;
+ struct regmap_config regmap_config;
void __iomem *base;
long parent_rate;
unsigned int i, clone_mask = 0;
@@ -1063,8 +1106,10 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)
return PTR_ERR(base);
}

+ regmap_config = ingenic_drm_regmap_config;
+ regmap_config.max_register = soc_info->max_reg;
priv->map = devm_regmap_init_mmio(dev, base,
- &ingenic_drm_regmap_config);
+ &regmap_config);

I remember saying to split this change into its own patch :)

if (IS_ERR(priv->map)) {
dev_err(dev, "Failed to create regmap\n");
return PTR_ERR(priv->map);
@@ -1274,7 +1319,7 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)

/* Enable OSD if available */
if (soc_info->has_osd)
- regmap_write(priv->map, JZ_REG_LCD_OSDC, JZ_LCD_OSDC_OSDEN);
+ regmap_set_bits(priv->map, JZ_REG_LCD_OSDC, JZ_LCD_OSDC_OSDEN);

This change is unrelated to this patch, and I'm not even sure it's a valid change. The driver shouldn't rely on previous register values.

mutex_init(&priv->clk_mutex);
priv->clock_nb.notifier_call = ingenic_drm_update_pixclk;
@@ -1444,6 +1489,7 @@ static const struct jz_soc_info jz4740_soc_info = {
.formats_f1 = jz4740_formats,
.num_formats_f1 = ARRAY_SIZE(jz4740_formats),
/* JZ4740 has only one plane */
+ .max_reg = JZ_REG_LCD_SIZE1,
};

static const struct jz_soc_info jz4725b_soc_info = {
@@ -1456,6 +1502,7 @@ static const struct jz_soc_info jz4725b_soc_info = {
.num_formats_f1 = ARRAY_SIZE(jz4725b_formats_f1),
.formats_f0 = jz4725b_formats_f0,
.num_formats_f0 = ARRAY_SIZE(jz4725b_formats_f0),
+ .max_reg = JZ_REG_LCD_SIZE1,
};

static const struct jz_soc_info jz4770_soc_info = {
@@ -1468,12 +1515,28 @@ static const struct jz_soc_info jz4770_soc_info = {
.num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
.formats_f0 = jz4770_formats_f0,
.num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
+ .max_reg = JZ_REG_LCD_SIZE1,
+};
+
+static const struct jz_soc_info jz4780_soc_info = {
+ .needs_dev_clk = true,
+ .has_osd = true,
+ .use_extended_hwdesc = true,
+ .max_width = 4096,
+ .max_height = 2048,
+ /* REVISIT: do we support formats different from jz4770? */

From a quick look at the PMs, it doesn't seem so.

+ .formats_f1 = jz4770_formats_f1,
+ .num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
+ .formats_f0 = jz4770_formats_f0,
+ .num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
+ .max_reg = JZ_REG_LCD_PCFG,
};

static const struct of_device_id ingenic_drm_of_match[] = {
{ .compatible = "ingenic,jz4740-lcd", .data = &jz4740_soc_info },
{ .compatible = "ingenic,jz4725b-lcd", .data = &jz4725b_soc_info },
{ .compatible = "ingenic,jz4770-lcd", .data = &jz4770_soc_info },
+ { .compatible = "ingenic,jz4780-lcd", .data = &jz4780_soc_info },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ingenic_drm_of_match);
@@ -1492,10 +1555,16 @@ static int ingenic_drm_init(void)
{
int err;

+ if (IS_ENABLED(CONFIG_DRM_INGENIC_DW_HDMI)) {
+ err = platform_driver_register(ingenic_dw_hdmi_driver_ptr);
+ if (err)
+ return err;
+ }

As I said in your v4... You don't need to add this here. The ingenic-dw-hdmi.c should take care of registering its driver.

As for the overall change... I am a bit annoyed that this only supports the F1 plane at the screen's resolution. Anything else (F1 plane at specific coordinates, F0 plane alone, or F0+F1) does not work. I think at least the F1 plane's position should be easy to do (just setting the cpos field in the hwdesc).

It is OK to leave the rest for later (I'm not asking you to do all that). However it would be a good idea to add a check in ingenic_drm_crtc_atomic_check(), which would return -EINVAL if anything else than the working configuration is attempted.

Cheers,
-Paul

+
if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU)) {
err = platform_driver_register(ingenic_ipu_driver_ptr);
if (err)
- return err;
+ goto err_hdmi_unreg;
}

err = platform_driver_register(&ingenic_drm_driver);
@@ -1507,6 +1576,10 @@ static int ingenic_drm_init(void)
err_ipu_unreg:
if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
platform_driver_unregister(ingenic_ipu_driver_ptr);
+err_hdmi_unreg:
+ if (IS_ENABLED(CONFIG_DRM_INGENIC_DW_HDMI))
+ platform_driver_unregister(ingenic_dw_hdmi_driver_ptr);
+
return err;
}
module_init(ingenic_drm_init);
@@ -1515,6 +1588,8 @@ static void ingenic_drm_exit(void)
{
platform_driver_unregister(&ingenic_drm_driver);

+ if (IS_ENABLED(CONFIG_DRM_INGENIC_DW_HDMI))
+ platform_driver_unregister(ingenic_dw_hdmi_driver_ptr);
if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
platform_driver_unregister(ingenic_ipu_driver_ptr);
}
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.h b/drivers/gpu/drm/ingenic/ingenic-drm.h
index 22654ac1dde1..13dbc5d25c3b 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm.h
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.h
@@ -44,8 +44,11 @@
#define JZ_REG_LCD_XYP1 0x124
#define JZ_REG_LCD_SIZE0 0x128
#define JZ_REG_LCD_SIZE1 0x12c
+#define JZ_REG_LCD_PCFG 0x2c0

#define JZ_LCD_CFG_SLCD BIT(31)
+#define JZ_LCD_CFG_DESCRIPTOR_8 BIT(28)
+#define JZ_LCD_CFG_RECOVER_FIFO_UNDERRUN BIT(25)
#define JZ_LCD_CFG_PS_DISABLE BIT(23)
#define JZ_LCD_CFG_CLS_DISABLE BIT(22)
#define JZ_LCD_CFG_SPL_DISABLE BIT(21)
@@ -63,6 +66,7 @@
#define JZ_LCD_CFG_DE_ACTIVE_LOW BIT(9)
#define JZ_LCD_CFG_VSYNC_ACTIVE_LOW BIT(8)
#define JZ_LCD_CFG_18_BIT BIT(7)
+#define JZ_LCD_CFG_24_BIT BIT(6)
#define JZ_LCD_CFG_PDW (BIT(5) | BIT(4))

#define JZ_LCD_CFG_MODE_GENERIC_16BIT 0
@@ -132,6 +136,7 @@
#define JZ_LCD_CMD_SOF_IRQ BIT(31)
#define JZ_LCD_CMD_EOF_IRQ BIT(30)
#define JZ_LCD_CMD_ENABLE_PAL BIT(28)
+#define JZ_LCD_CMD_FRM_ENABLE BIT(26)

#define JZ_LCD_SYNC_MASK 0x3ff

@@ -153,6 +158,7 @@
#define JZ_LCD_RGBC_EVEN_BGR (0x5 << 0)

#define JZ_LCD_OSDC_OSDEN BIT(0)
+#define JZ_LCD_OSDC_ALPHAEN BIT(2)
#define JZ_LCD_OSDC_F0EN BIT(3)
#define JZ_LCD_OSDC_F1EN BIT(4)

@@ -176,6 +182,41 @@
#define JZ_LCD_SIZE01_WIDTH_LSB 0
#define JZ_LCD_SIZE01_HEIGHT_LSB 16

+#define JZ_LCD_DESSIZE_ALPHA_OFFSET 24
+#define JZ_LCD_DESSIZE_HEIGHT_OFFSET 12
+#define JZ_LCD_DESSIZE_WIDTH_OFFSET 0
+#define JZ_LCD_DESSIZE_HEIGHT_MASK 0xfff
+#define JZ_LCD_DESSIZE_WIDTH_MASK 0xfff
+
+/* TODO: 4,5 and 7 match the above BPP */
+#define JZ_LCD_CPOS_BPP_15_16 (4 << 27)
+#define JZ_LCD_CPOS_BPP_18_24 (5 << 27)
+#define JZ_LCD_CPOS_BPP_30 (7 << 27)
+#define JZ_LCD_CPOS_RGB555 BIT(30)
+#define JZ_LCD_CPOS_PREMULTIPLY_LCD BIT(26)
+#define JZ_LCD_CPOS_COEFFICIENT_OFFSET 24
+#define JZ_LCD_CPOS_COEFFICIENT_0 0
+#define JZ_LCD_CPOS_COEFFICIENT_1 1
+#define JZ_LCD_CPOS_COEFFICIENT_ALPHA1 2
+#define JZ_LCD_CPOS_COEFFICIENT_1_ALPHA1 3
+
+#define JZ_LCD_RGBC_RGB_PADDING BIT(15)
+#define JZ_LCD_RGBC_RGB_PADDING_FIRST BIT(14)
+#define JZ_LCD_RGBC_422 BIT(8)
+#define JZ_LCD_RGBC_RGB_FORMAT_ENABLE BIT(7)
+
+#define JZ_LCD_PCFG_PRI_MODE BIT(31)
+#define JZ_LCD_PCFG_HP_BST_4 (0 << 28)
+#define JZ_LCD_PCFG_HP_BST_8 (1 << 28)
+#define JZ_LCD_PCFG_HP_BST_16 (2 << 28)
+#define JZ_LCD_PCFG_HP_BST_32 (3 << 28)
+#define JZ_LCD_PCFG_HP_BST_64 (4 << 28)
+#define JZ_LCD_PCFG_HP_BST_16_CONT (5 << 28)
+#define JZ_LCD_PCFG_HP_BST_DISABLE (7 << 28)
+#define JZ_LCD_PCFG_THRESHOLD2_OFFSET 18
+#define JZ_LCD_PCFG_THRESHOLD1_OFFSET 9
+#define JZ_LCD_PCFG_THRESHOLD0_OFFSET 0
+
struct device;
struct drm_plane;
struct drm_plane_state;
@@ -187,5 +228,6 @@ void ingenic_drm_plane_disable(struct device *dev, struct drm_plane *plane);
bool ingenic_drm_map_noncoherent(const struct device *dev);

extern struct platform_driver *ingenic_ipu_driver_ptr;
+extern struct platform_driver *ingenic_dw_hdmi_driver_ptr;

#endif /* DRIVERS_GPU_DRM_INGENIC_INGENIC_DRM_H */
--
2.33.0

Next message: Don.Brace: "RE: [smartpqi updates PATCH V2 09/11] smartpqi: fix duplicate device nodes for tape changers"
Previous message: Peter Zijlstra: "Re: [PATCH 2/4] perf: Add mem_hops field in perf_mem_data_src structure"
In reply to: H. Nikolaus Schaller: "[PATCH v5 2/7] drm/ingenic: Add support for JZ4780 and HDMI output"
Next in thread: H. Nikolaus Schaller: "[PATCH v5 3/7] dt-bindings: display: Add ingenic,jz4780-dw-hdmi DT Schema"
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