Merge tag 'mediatek-drm-next-6.7' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-next

Mediatek DRM Next for Linux 6.7

1. Add support MT8188 dsi function
2. Fix coverity issue with unintentional integer overflow
3. Add support MT8188 dp/edp function
4. Fix memory leak on ->get_edid callback audio detection
   and error path.
5. Add connector dynamic selection capability
6. MediaTek DDP GAMMA - 12-bit LUT support
7. mtk_dsi: Fix NO_EOT_PACKET settings/handling

[airlied: add bitfield.h include]
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231018135846.5811-1-chunkuang.hu@kernel.org

1 files changed, 78 insertions, 9 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
index 4da9ac93b29e..2209159d8855 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2021 MediaTek Inc.
  */
 
+#include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
@@ -17,14 +18,31 @@
 
 #define DISP_AAL_EN				0x0000
 #define AAL_EN						BIT(0)
+#define DISP_AAL_CFG				0x0020
+#define AAL_RELAY_MODE					BIT(0)
+#define AAL_GAMMA_LUT_EN				BIT(1)
 #define DISP_AAL_SIZE				0x0030
+#define DISP_AAL_SIZE_HSIZE				GENMASK(28, 16)
+#define DISP_AAL_SIZE_VSIZE				GENMASK(12, 0)
 #define DISP_AAL_OUTPUT_SIZE			0x04d8
-
+#define DISP_AAL_GAMMA_LUT			0x0700
+#define DISP_AAL_GAMMA_LUT_R				GENMASK(29, 20)
+#define DISP_AAL_GAMMA_LUT_G				GENMASK(19, 10)
+#define DISP_AAL_GAMMA_LUT_B				GENMASK(9, 0)
+#define DISP_AAL_LUT_BITS			10
+#define DISP_AAL_LUT_SIZE			512
 
 struct mtk_disp_aal_data {
 	bool has_gamma;
 };
 
+ /**
+  * struct mtk_disp_aal - Display Adaptive Ambient Light driver structure
+  * @clk:      clock for DISP_AAL controller
+  * @regs:     MMIO registers base
+  * @cmdq_reg: CMDQ Client register
+  * @data:     platform specific data for DISP_AAL
+  */
 struct mtk_disp_aal {
 	struct clk *clk;
 	void __iomem *regs;
@@ -51,17 +69,69 @@ void mtk_aal_config(struct device *dev, unsigned int w,
 			   unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
 {
 	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
+	u32 sz;
+
+	sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w);
+	sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h);
 
-	mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
-	mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
+	mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
+	mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
 }
 
-void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
+/**
+ * mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL
+ * @dev: Pointer to struct device
+ *
+ * Return: 0 if gamma control not supported in AAL or gamma LUT size
+ */
+unsigned int mtk_aal_gamma_get_lut_size(struct device *dev)
 {
 	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
 
 	if (aal->data && aal->data->has_gamma)
-		mtk_gamma_set_common(aal->regs, state, false);
+		return DISP_AAL_LUT_SIZE;
+	return 0;
+}
+
+void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
+{
+	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
+	struct drm_color_lut *lut;
+	unsigned int i;
+	u32 cfg_val;
+
+	/* If gamma is not supported in AAL, go out immediately */
+	if (!(aal->data && aal->data->has_gamma))
+		return;
+
+	/* Also, if there's no gamma lut there's nothing to do here. */
+	if (!state->gamma_lut)
+		return;
+
+	lut = (struct drm_color_lut *)state->gamma_lut->data;
+	for (i = 0; i < DISP_AAL_LUT_SIZE; i++) {
+		struct drm_color_lut hwlut = {
+			.red = drm_color_lut_extract(lut[i].red, DISP_AAL_LUT_BITS),
+			.green = drm_color_lut_extract(lut[i].green, DISP_AAL_LUT_BITS),
+			.blue = drm_color_lut_extract(lut[i].blue, DISP_AAL_LUT_BITS)
+		};
+		u32 word;
+
+		word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red);
+		word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green);
+		word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue);
+		writel(word, aal->regs + DISP_AAL_GAMMA_LUT + i * 4);
+	}
+
+	cfg_val = readl(aal->regs + DISP_AAL_CFG);
+
+	/* Enable the gamma table */
+	cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1);
+
+	/* Disable RELAY mode to pass the processed image */
+	cfg_val &= ~AAL_RELAY_MODE;
+
+	writel(cfg_val, aal->regs + DISP_AAL_CFG);
 }
 
 void mtk_aal_start(struct device *dev)
@@ -144,10 +214,9 @@ static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
 };
 
 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
-	{ .compatible = "mediatek,mt8173-disp-aal",
-	  .data = &mt8173_aal_driver_data},
-	{ .compatible = "mediatek,mt8183-disp-aal"},
-	{},
+	{ .compatible = "mediatek,mt8173-disp-aal", .data = &mt8173_aal_driver_data },
+	{ .compatible = "mediatek,mt8183-disp-aal" },
+	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);