[PATCH v2 14/16] media: imx-pxp: Introduce pxp_read() and pxp_write() wrappers

[Michael Tretter <m.tretter@pengutronix.de>]

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Add pxp_read() and pxp_write() functions to wrap readl() and writel()
respectively. This can be useful for debugging register accesses.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
---
Changelog

v2:

- pick from https://lore.kernel.org/linux-media/20230112172507.30579-1-laurent.pinchart@ideasonboard.com/
- fix conflict due to removed pxp_read_version
---
 drivers/media/platform/nxp/imx-pxp.c | 118 +++++++++++++++++++----------------
 1 file changed, 64 insertions(+), 54 deletions(-)

diff --git a/drivers/media/platform/nxp/imx-pxp.c b/drivers/media/platform/nxp/imx-pxp.c
index f34eba62f7d6..124d272194d1 100644
--- a/drivers/media/platform/nxp/imx-pxp.c
+++ b/drivers/media/platform/nxp/imx-pxp.c
@@ -253,6 +253,16 @@ static struct pxp_q_data *get_q_data(struct pxp_ctx *ctx,
 		return &ctx->q_data[V4L2_M2M_DST];
 }
 
+static inline u32 pxp_read(struct pxp_dev *dev, u32 reg)
+{
+	return readl(dev->mmio + reg);
+}
+
+static inline void pxp_write(struct pxp_dev *dev, u32 reg, u32 value)
+{
+	writel(value, dev->mmio + reg);
+}
+
 static u32 pxp_v4l2_pix_fmt_to_ps_format(u32 v4l2_pix_fmt)
 {
 	switch (v4l2_pix_fmt) {
@@ -505,11 +515,11 @@ static void pxp_setup_csc(struct pxp_ctx *ctx)
 				csc1_coef = csc1_coef_smpte240m_lim;
 		}
 
-		writel(csc1_coef[0], dev->mmio + HW_PXP_CSC1_COEF0);
-		writel(csc1_coef[1], dev->mmio + HW_PXP_CSC1_COEF1);
-		writel(csc1_coef[2], dev->mmio + HW_PXP_CSC1_COEF2);
+		pxp_write(dev, HW_PXP_CSC1_COEF0, csc1_coef[0]);
+		pxp_write(dev, HW_PXP_CSC1_COEF1, csc1_coef[1]);
+		pxp_write(dev, HW_PXP_CSC1_COEF2, csc1_coef[2]);
 	} else {
-		writel(BM_PXP_CSC1_COEF0_BYPASS, dev->mmio + HW_PXP_CSC1_COEF0);
+		pxp_write(dev, HW_PXP_CSC1_COEF0, BM_PXP_CSC1_COEF0_BYPASS);
 	}
 
 	if (!pxp_v4l2_pix_fmt_is_yuv(ctx->q_data[V4L2_M2M_SRC].fmt->fourcc) &&
@@ -725,15 +735,15 @@ static void pxp_setup_csc(struct pxp_ctx *ctx)
 				    BP_PXP_CSC2_CTRL_CSC_MODE;
 		}
 
-		writel(csc2_ctrl, dev->mmio + HW_PXP_CSC2_CTRL);
-		writel(csc2_coef[0], dev->mmio + HW_PXP_CSC2_COEF0);
-		writel(csc2_coef[1], dev->mmio + HW_PXP_CSC2_COEF1);
-		writel(csc2_coef[2], dev->mmio + HW_PXP_CSC2_COEF2);
-		writel(csc2_coef[3], dev->mmio + HW_PXP_CSC2_COEF3);
-		writel(csc2_coef[4], dev->mmio + HW_PXP_CSC2_COEF4);
-		writel(csc2_coef[5], dev->mmio + HW_PXP_CSC2_COEF5);
+		pxp_write(dev, HW_PXP_CSC2_CTRL, csc2_ctrl);
+		pxp_write(dev, HW_PXP_CSC2_COEF0, csc2_coef[0]);
+		pxp_write(dev, HW_PXP_CSC2_COEF1, csc2_coef[1]);
+		pxp_write(dev, HW_PXP_CSC2_COEF2, csc2_coef[2]);
+		pxp_write(dev, HW_PXP_CSC2_COEF3, csc2_coef[3]);
+		pxp_write(dev, HW_PXP_CSC2_COEF4, csc2_coef[4]);
+		pxp_write(dev, HW_PXP_CSC2_COEF5, csc2_coef[5]);
 	} else {
-		writel(BM_PXP_CSC2_CTRL_BYPASS, dev->mmio + HW_PXP_CSC2_CTRL);
+		pxp_write(dev, HW_PXP_CSC2_CTRL, BM_PXP_CSC2_CTRL_BYPASS);
 	}
 }
 
@@ -810,8 +820,8 @@ static void pxp_set_data_path(struct pxp_ctx *ctx)
 	ctrl1 |= BF_PXP_DATA_PATH_CTRL1_MUX17_SEL(3);
 	ctrl1 |= BF_PXP_DATA_PATH_CTRL1_MUX16_SEL(3);
 
-	writel(ctrl0, dev->mmio + HW_PXP_DATA_PATH_CTRL0);
-	writel(ctrl1, dev->mmio + HW_PXP_DATA_PATH_CTRL1);
+	pxp_write(dev, HW_PXP_DATA_PATH_CTRL0, ctrl0);
+	pxp_write(dev, HW_PXP_DATA_PATH_CTRL1, ctrl1);
 }
 
 static int pxp_start(struct pxp_ctx *ctx, struct vb2_v4l2_buffer *in_vb,
@@ -967,48 +977,48 @@ static int pxp_start(struct pxp_ctx *ctx, struct vb2_v4l2_buffer *in_vb,
 		   BF_PXP_PS_SCALE_XSCALE(xscale);
 	ps_offset = BF_PXP_PS_OFFSET_YOFFSET(0) | BF_PXP_PS_OFFSET_XOFFSET(0);
 
-	writel(ctrl, dev->mmio + HW_PXP_CTRL);
+	pxp_write(dev, HW_PXP_CTRL, ctrl);
 	/* skip STAT */
-	writel(out_ctrl, dev->mmio + HW_PXP_OUT_CTRL);
-	writel(out_buf, dev->mmio + HW_PXP_OUT_BUF);
-	writel(out_buf2, dev->mmio + HW_PXP_OUT_BUF2);
-	writel(out_pitch, dev->mmio + HW_PXP_OUT_PITCH);
-	writel(out_lrc, dev->mmio + HW_PXP_OUT_LRC);
-	writel(out_ps_ulc, dev->mmio + HW_PXP_OUT_PS_ULC);
-	writel(out_ps_lrc, dev->mmio + HW_PXP_OUT_PS_LRC);
-	writel(as_ulc, dev->mmio + HW_PXP_OUT_AS_ULC);
-	writel(as_lrc, dev->mmio + HW_PXP_OUT_AS_LRC);
-	writel(ps_ctrl, dev->mmio + HW_PXP_PS_CTRL);
-	writel(ps_buf, dev->mmio + HW_PXP_PS_BUF);
-	writel(ps_ubuf, dev->mmio + HW_PXP_PS_UBUF);
-	writel(ps_vbuf, dev->mmio + HW_PXP_PS_VBUF);
-	writel(ps_pitch, dev->mmio + HW_PXP_PS_PITCH);
-	writel(0x00ffffff, dev->mmio + HW_PXP_PS_BACKGROUND_0);
-	writel(ps_scale, dev->mmio + HW_PXP_PS_SCALE);
-	writel(ps_offset, dev->mmio + HW_PXP_PS_OFFSET);
+	pxp_write(dev, HW_PXP_OUT_CTRL, out_ctrl);
+	pxp_write(dev, HW_PXP_OUT_BUF, out_buf);
+	pxp_write(dev, HW_PXP_OUT_BUF2, out_buf2);
+	pxp_write(dev, HW_PXP_OUT_PITCH, out_pitch);
+	pxp_write(dev, HW_PXP_OUT_LRC, out_lrc);
+	pxp_write(dev, HW_PXP_OUT_PS_ULC, out_ps_ulc);
+	pxp_write(dev, HW_PXP_OUT_PS_LRC, out_ps_lrc);
+	pxp_write(dev, HW_PXP_OUT_AS_ULC, as_ulc);
+	pxp_write(dev, HW_PXP_OUT_AS_LRC, as_lrc);
+	pxp_write(dev, HW_PXP_PS_CTRL, ps_ctrl);
+	pxp_write(dev, HW_PXP_PS_BUF, ps_buf);
+	pxp_write(dev, HW_PXP_PS_UBUF, ps_ubuf);
+	pxp_write(dev, HW_PXP_PS_VBUF, ps_vbuf);
+	pxp_write(dev, HW_PXP_PS_PITCH, ps_pitch);
+	pxp_write(dev, HW_PXP_PS_BACKGROUND_0, 0x00ffffff);
+	pxp_write(dev, HW_PXP_PS_SCALE, ps_scale);
+	pxp_write(dev, HW_PXP_PS_OFFSET, ps_offset);
 	/* disable processed surface color keying */
-	writel(0x00ffffff, dev->mmio + HW_PXP_PS_CLRKEYLOW_0);
-	writel(0x00000000, dev->mmio + HW_PXP_PS_CLRKEYHIGH_0);
+	pxp_write(dev, HW_PXP_PS_CLRKEYLOW_0, 0x00ffffff);
+	pxp_write(dev, HW_PXP_PS_CLRKEYHIGH_0, 0x00000000);
 
 	/* disable alpha surface color keying */
-	writel(0x00ffffff, dev->mmio + HW_PXP_AS_CLRKEYLOW_0);
-	writel(0x00000000, dev->mmio + HW_PXP_AS_CLRKEYHIGH_0);
+	pxp_write(dev, HW_PXP_AS_CLRKEYLOW_0, 0x00ffffff);
+	pxp_write(dev, HW_PXP_AS_CLRKEYHIGH_0, 0x00000000);
 
 	/* setup CSC */
 	pxp_setup_csc(ctx);
 
 	/* bypass LUT */
-	writel(BM_PXP_LUT_CTRL_BYPASS, dev->mmio + HW_PXP_LUT_CTRL);
+	pxp_write(dev, HW_PXP_LUT_CTRL, BM_PXP_LUT_CTRL_BYPASS);
 
 	pxp_set_data_path(ctx);
 
-	writel(0xffff, dev->mmio + HW_PXP_IRQ_MASK);
+	pxp_write(dev, HW_PXP_IRQ_MASK, 0xffff);
 
 	/* ungate, enable PS/AS/OUT and PXP operation */
-	writel(BM_PXP_CTRL_IRQ_ENABLE, dev->mmio + HW_PXP_CTRL_SET);
-	writel(BM_PXP_CTRL_ENABLE | BM_PXP_CTRL_ENABLE_CSC2 |
-	       BM_PXP_CTRL_ENABLE_ROTATE0 |
-	       BM_PXP_CTRL_ENABLE_PS_AS_OUT, dev->mmio + HW_PXP_CTRL_SET);
+	pxp_write(dev, HW_PXP_CTRL_SET, BM_PXP_CTRL_IRQ_ENABLE);
+	pxp_write(dev, HW_PXP_CTRL_SET,
+		  BM_PXP_CTRL_ENABLE | BM_PXP_CTRL_ENABLE_CSC2 |
+		  BM_PXP_CTRL_ENABLE_ROTATE0 | BM_PXP_CTRL_ENABLE_PS_AS_OUT);
 
 	return 0;
 }
@@ -1081,23 +1091,23 @@ static irqreturn_t pxp_irq_handler(int irq, void *dev_id)
 	struct pxp_dev *dev = dev_id;
 	u32 stat;
 
-	stat = readl(dev->mmio + HW_PXP_STAT);
+	stat = pxp_read(dev, HW_PXP_STAT);
 
 	if (stat & BM_PXP_STAT_IRQ0) {
 		/* we expect x = 0, y = height, irq0 = 1 */
 		if (stat & ~(BM_PXP_STAT_BLOCKX | BM_PXP_STAT_BLOCKY |
 			     BM_PXP_STAT_IRQ0))
 			dprintk(dev, "%s: stat = 0x%08x\n", __func__, stat);
-		writel(BM_PXP_STAT_IRQ0, dev->mmio + HW_PXP_STAT_CLR);
+		pxp_write(dev, HW_PXP_STAT_CLR, BM_PXP_STAT_IRQ0);
 
 		pxp_job_finish(dev);
 	} else {
-		u32 irq = readl(dev->mmio + HW_PXP_IRQ);
+		u32 irq = pxp_read(dev, HW_PXP_IRQ);
 
 		dprintk(dev, "%s: stat = 0x%08x\n", __func__, stat);
 		dprintk(dev, "%s: irq = 0x%08x\n", __func__, irq);
 
-		writel(irq, dev->mmio + HW_PXP_IRQ_CLR);
+		pxp_write(dev, HW_PXP_IRQ_CLR, irq);
 	}
 
 	return IRQ_HANDLED;
@@ -1741,18 +1751,18 @@ static int pxp_soft_reset(struct pxp_dev *dev)
 	int ret;
 	u32 val;
 
-	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_CLR);
-	writel(BM_PXP_CTRL_CLKGATE, dev->mmio + HW_PXP_CTRL_CLR);
+	pxp_write(dev, HW_PXP_CTRL_CLR, BM_PXP_CTRL_SFTRST);
+	pxp_write(dev, HW_PXP_CTRL_CLR, BM_PXP_CTRL_CLKGATE);
 
-	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_SET);
+	pxp_write(dev, HW_PXP_CTRL_SET, BM_PXP_CTRL_SFTRST);
 
 	ret = readl_poll_timeout(dev->mmio + HW_PXP_CTRL, val,
 				 val & BM_PXP_CTRL_CLKGATE, 0, 100);
 	if (ret < 0)
 		return ret;
 
-	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_CLR);
-	writel(BM_PXP_CTRL_CLKGATE, dev->mmio + HW_PXP_CTRL_CLR);
+	pxp_write(dev, HW_PXP_CTRL_CLR, BM_PXP_CTRL_SFTRST);
+	pxp_write(dev, HW_PXP_CTRL_CLR, BM_PXP_CTRL_CLKGATE);
 
 	return 0;
 }
@@ -1805,7 +1815,7 @@ static int pxp_probe(struct platform_device *pdev)
 		goto err_clk;
 	}
 
-	hw_version = readl(dev->mmio + HW_PXP_VERSION);
+	hw_version = pxp_read(dev, HW_PXP_VERSION);
 	dev_dbg(&pdev->dev, "PXP Version %u.%u\n",
 		PXP_VERSION_MAJOR(hw_version), PXP_VERSION_MINOR(hw_version));
 
@@ -1883,8 +1893,8 @@ static int pxp_remove(struct platform_device *pdev)
 {
 	struct pxp_dev *dev = platform_get_drvdata(pdev);
 
-	writel(BM_PXP_CTRL_CLKGATE, dev->mmio + HW_PXP_CTRL_SET);
-	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_SET);
+	pxp_write(dev, HW_PXP_CTRL_SET, BM_PXP_CTRL_CLKGATE);
+	pxp_write(dev, HW_PXP_CTRL_SET, BM_PXP_CTRL_SFTRST);
 
 	clk_disable_unprepare(dev->clk);
 

-- 
2.30.2