Re: [PATCH v14 1/2] drm: add kms driver for loongson display controller

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,

On 2023/5/21 20:21, WANG Xuerui wrote:
+#ifndef __LSDC_REGS_H__
+#define __LSDC_REGS_H__
+
+#include <linux/bitops.h>
+#include <linux/types.h>
+
+/*
+ * PIXEL PLL Reference clock
+ */
+#define LSDC_PLL_REF_CLK                100000           /* kHz */

Consider naming it like "LSDC_PLL_REF_CLK_KHZ" for it to be self-documenting?

Indeed, this is really reasonable.  Can be self-documenting.

thanks.

+
+/*
+ * Those PLL registers are relative to LSxxxxx_CFG_REG_BASE. xxxxx = 7A1000,
+ * 7A2000, 2K2000, 2K1000 etc.
+ */
+
+/* LS7A1000 */
+
+#define LS7A1000_PIXPLL0_REG            0x04B0
+#define LS7A1000_PIXPLL1_REG            0x04C0
+
+/* The DC, GPU, Graphic Memory Controller share the single gfxpll */
+#define LS7A1000_PLL_GFX_REG            0x0490
+
+#define LS7A1000_CONF_REG_BASE          0x10010000
+
+/* LS7A2000 */
+
+#define LS7A2000_PIXPLL0_REG            0x04B0
+#define LS7A2000_PIXPLL1_REG            0x04C0
+
+/* The DC, GPU, Graphic Memory Controller share the single gfxpll */
+#define LS7A2000_PLL_GFX_REG            0x0490
+
+#define LS7A2000_CONF_REG_BASE          0x10010000
+
+/* For LSDC_CRTCx_CFG_REG */
+#define CFG_PIX_FMT_MASK                GENMASK(2, 0)
+
+enum lsdc_pixel_format {
+    LSDC_PF_NONE = 0,
+    LSDC_PF_XRGB444 = 1,    /* [12 bits] */
+    LSDC_PF_XRGB555 = 2,    /* [15 bits] */
+    LSDC_PF_XRGB565 = 3,    /* RGB [16 bits] */
+    LSDC_PF_XRGB8888 = 4,   /* XRGB [32 bits] */
+};
+
+/*
+ * Each crtc has two set fb address registers usable, FB_REG_IN_USING bit of + * LSDC_CRTCx_CFG_REG indicate which fb address register is in using by the + * CRTC currently. CFG_PAGE_FLIP is used to trigger the switch, the switching + * will be finished at the very next vblank. Trigger it again if you want to
+ * switch back.
+ *
+ * If FB0_ADDR_REG is in using, we write the address to FB0_ADDR_REG,
+ * if FB1_ADDR_REG is in using, we write the address to FB1_ADDR_REG.
+ */
+#define CFG_PAGE_FLIP                   BIT(7)
+#define CFG_OUTPUT_ENABLE               BIT(8)
+#define CFG_HW_CLONE                    BIT(9)
+/* Indicate witch fb addr reg is in using, currently. read only */
+#define FB_REG_IN_USING                 BIT(11)
+#define CFG_GAMMA_EN                    BIT(12)
+
+/* The DC get soft reset if this bit changed from "1" to "0", active low */
+#define CFG_RESET_N                     BIT(20)
+/* If this bit is set, it say that the CRTC stop working anymore, anchored. */
+#define CRTC_ANCHORED                   BIT(24)
+
+/*
+ * The DMA step of the DC in LS7A2000/LS2K2000 is configurable,
+ * setting those bits on ls7a1000 platform make no effect.
+ */
+#define CFG_DMA_STEP_MASK              GENMASK(17, 16)
+#define CFG_DMA_STEP_SHIFT             16
+enum lsdc_dma_steps {
+    LSDC_DMA_STEP_256_BYTES = 0,
+    LSDC_DMA_STEP_128_BYTES = 1,
+    LSDC_DMA_STEP_64_BYTES = 2,
+    LSDC_DMA_STEP_32_BYTES = 3,
+};
+
+#define CFG_VALID_BITS_MASK             GENMASK(20, 0)
+
+/* For LSDC_CRTCx_PANEL_CONF_REG */
+#define PHY_CLOCK_POL                   BIT(9)
+#define PHY_CLOCK_EN                    BIT(8)
+#define PHY_DE_POL                      BIT(1)
+#define PHY_DATA_EN                     BIT(0)
+
+/* For LSDC_CRTCx_HSYNC_REG */
+#define HSYNC_INV                       BIT(31)
+#define HSYNC_EN                        BIT(30)
+#define HSYNC_END_MASK                  GENMASK(28, 16)
+#define HSYNC_END_SHIFT                 16
+#define HSYNC_START_MASK                GENMASK(12, 0)
+#define HSYNC_START_SHIFT               0
+
+/* For LSDC_CRTCx_VSYNC_REG */
+#define VSYNC_INV                       BIT(31)
+#define VSYNC_EN                        BIT(30)
+#define VSYNC_END_MASK                  GENMASK(27, 16)
+#define VSYNC_END_SHIFT                 16
+#define VSYNC_START_MASK                GENMASK(11, 0)
+#define VSYNC_START_SHIFT               0
+
+/*********** CRTC0 & DISPLAY PIPE0 ***********/
+#define LSDC_CRTC0_CFG_REG              0x1240
+#define LSDC_CRTC0_FB0_ADDR_LO_REG      0x1260
+#define LSDC_CRTC0_FB0_ADDR_HI_REG      0x15A0
+#define LSDC_CRTC0_STRIDE_REG           0x1280
+#define LSDC_CRTC0_FB_ORIGIN_REG        0x1300
+#define LSDC_CRTC0_PANEL_CONF_REG       0x13C0
+#define LSDC_CRTC0_HDISPLAY_REG         0x1400
+#define LSDC_CRTC0_HSYNC_REG            0x1420
+#define LSDC_CRTC0_VDISPLAY_REG         0x1480
+#define LSDC_CRTC0_VSYNC_REG            0x14A0
+#define LSDC_CRTC0_GAMMA_INDEX_REG      0x14E0
+#define LSDC_CRTC0_GAMMA_DATA_REG       0x1500
+#define LSDC_CRTC0_FB1_ADDR_LO_REG      0x1580
+#define LSDC_CRTC0_FB1_ADDR_HI_REG      0x15C0
+
+/*********** CTRC1 & DISPLAY PIPE1 ***********/

"CRTC1"

Indeed, thanks for your sharpen eyes.

I will try to solve all other problems you mentioned at next version.

I don't notice this.

Great thanks.




[Index of Archives]     [Linux DRI Users]     [Linux Intel Graphics]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux