drm: meson: global clean-up

This patch aims to:
- Add general and TODO comments
- Respect coding style for multi-line comments
- Align macro definitions
- Remove useless macro

Signed-off-by: Julien Masson <jmasson@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/86pnn382e8.fsf@baylibre.com

5 files changed, 33 insertions, 26 deletions

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 9f0b08eaf003..f893ebd0b799 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -429,6 +429,8 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
 	/* Enable internal pixclk, tmds_clk, spdif_clk, i2s_clk, cecclk */
 	dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
 			       0x3, 0x3);
+
+	/* Enable cec_clk and hdcp22_tmdsclk_en */
 	dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
 			       0x3 << 4, 0x3 << 4);
 
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.h b/drivers/gpu/drm/meson/meson_dw_hdmi.h
index 1b2ef043eb5c..08e1c14e4ea0 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.h
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.h
@@ -100,7 +100,8 @@
 #define HDMITX_TOP_INTR_RXSENSE_RISE	BIT(6)
 #define HDMITX_TOP_INTR_RXSENSE_FALL	BIT(7)
 
-/* Bit 14:12 RW tmds_sel: 3'b000=Output zero; 3'b001=Output normal TMDS data;
+/*
+ * Bit 14:12 RW tmds_sel: 3'b000=Output zero; 3'b001=Output normal TMDS data;
  *     3'b010=Output PRBS data; 3'b100=Output shift pattern. Default 0.
  * Bit 11: 9 RW shift_pttn_repeat: 0=New pattern every clk cycle; 1=New pattern
  *     every 2 clk cycles; ...; 7=New pattern every 8 clk cycles. Default 0.
@@ -135,7 +136,8 @@
 /* Bit  9: 0 RW tmds_clk_pttn[29:20]. Default 0. */
 #define HDMITX_TOP_TMDS_CLK_PTTN_23             (0x00B)
 
-/* Bit 1 RW shift_tmds_clk_pttn:1=Enable shifting clk pattern,
+/*
+ * Bit 1 RW shift_tmds_clk_pttn:1=Enable shifting clk pattern,
  * used when TMDS CLK rate = TMDS character rate /4. Default 0.
  * Bit 0 R  Reserved. Default 0.
  * [	1] shift_tmds_clk_pttn
@@ -143,12 +145,14 @@
  */
 #define HDMITX_TOP_TMDS_CLK_PTTN_CNTL           (0x00C)
 
-/* Bit 0 RW revocmem_wr_fail: Read back 1 to indicate Host write REVOC MEM
+/*
+ * Bit 0 RW revocmem_wr_fail: Read back 1 to indicate Host write REVOC MEM
  * failure, write 1 to clear the failure flag.  Default 0.
  */
 #define HDMITX_TOP_REVOCMEM_STAT                (0x00D)
 
-/* Bit	   1 R	filtered RxSense status
+/*
+ * Bit	   1 R	filtered RxSense status
  * Bit     0 R  filtered HPD status.
  */
 #define HDMITX_TOP_STAT0                        (0x00E)
diff --git a/drivers/gpu/drm/meson/meson_registers.h b/drivers/gpu/drm/meson/meson_registers.h
index a96293880e82..05fce48ceee0 100644
--- a/drivers/gpu/drm/meson/meson_registers.h
+++ b/drivers/gpu/drm/meson/meson_registers.h
@@ -398,19 +398,19 @@
 #define VPP_PREBLEND_CURRENT_XY 0x1d24
 #define VPP_POSTBLEND_CURRENT_XY 0x1d25
 #define VPP_MISC 0x1d26
-#define		VPP_PREBLEND_ENABLE	BIT(6)
-#define		VPP_POSTBLEND_ENABLE	BIT(7)
-#define		VPP_OSD2_ALPHA_PREMULT	BIT(8)
-#define		VPP_OSD1_ALPHA_PREMULT	BIT(9)
-#define		VPP_VD1_POSTBLEND	BIT(10)
-#define		VPP_VD2_POSTBLEND	BIT(11)
-#define		VPP_OSD1_POSTBLEND	BIT(12)
-#define		VPP_OSD2_POSTBLEND	BIT(13)
-#define		VPP_VD1_PREBLEND	BIT(14)
-#define		VPP_VD2_PREBLEND	BIT(15)
-#define		VPP_OSD1_PREBLEND	BIT(16)
-#define		VPP_OSD2_PREBLEND	BIT(17)
-#define		VPP_COLOR_MNG_ENABLE	BIT(28)
+#define		VPP_PREBLEND_ENABLE             BIT(6)
+#define		VPP_POSTBLEND_ENABLE            BIT(7)
+#define		VPP_OSD2_ALPHA_PREMULT          BIT(8)
+#define		VPP_OSD1_ALPHA_PREMULT          BIT(9)
+#define		VPP_VD1_POSTBLEND               BIT(10)
+#define		VPP_VD2_POSTBLEND               BIT(11)
+#define		VPP_OSD1_POSTBLEND              BIT(12)
+#define		VPP_OSD2_POSTBLEND              BIT(13)
+#define		VPP_VD1_PREBLEND                BIT(14)
+#define		VPP_VD2_PREBLEND                BIT(15)
+#define		VPP_OSD1_PREBLEND               BIT(16)
+#define		VPP_OSD2_PREBLEND               BIT(17)
+#define		VPP_COLOR_MNG_ENABLE            BIT(28)
 #define VPP_OFIFO_SIZE 0x1d27
 #define		VPP_OFIFO_SIZE_MASK             GENMASK(13, 0)
 #define		VPP_OFIFO_SIZE_DEFAULT          (0xfff << 20 | 0x1000)
@@ -621,6 +621,7 @@
 #define OSD34_SCI_WH_M1 0x3d29
 #define OSD34_SCO_H_START_END 0x3d2a
 #define OSD34_SCO_V_START_END 0x3d2b
+
 /* viu2 */
 #define VIU2_ADDR_START 0x1e00
 #define VIU2_ADDR_END 0x1eff
@@ -1603,7 +1604,6 @@
 #define OSD1_AFBCD_STATUS 0x31a8
 #define OSD1_AFBCD_PIXEL_HSCOPE 0x31a9
 #define OSD1_AFBCD_PIXEL_VSCOPE 0x31aa
-#define VIU_MISC_CTRL1 0x1a07
 
 /* add for gxm and 962e dv core2 */
 #define DOLBY_CORE2A_SWAP_CTRL1	0x3434
@@ -1618,8 +1618,6 @@
 #define VPU_MAFBC_COMMAND 0x3a05
 #define VPU_MAFBC_STATUS 0x3a06
 #define VPU_MAFBC_SURFACE_CFG 0x3a07
-
-/* osd afbc on g12a */
 #define VPU_MAFBC_HEADER_BUF_ADDR_LOW_S0 0x3a10
 #define VPU_MAFBC_HEADER_BUF_ADDR_HIGH_S0 0x3a11
 #define VPU_MAFBC_FORMAT_SPECIFIER_S0 0x3a12
@@ -1740,6 +1738,5 @@
 #define VPP_POST_BLEND_DUMMY_ALPHA 0x3969
 #define VPP_RDARB_MODE 0x3978
 #define VPP_RDARB_REQEN_SLV 0x3979
-#define VPU_RDARB_MODE_L2C1 0x279d
 
 #endif /* __MESON_REGISTERS_H */
diff --git a/drivers/gpu/drm/meson/meson_vclk.c b/drivers/gpu/drm/meson/meson_vclk.c
index 8abff51f937d..c11b55237917 100644
--- a/drivers/gpu/drm/meson/meson_vclk.c
+++ b/drivers/gpu/drm/meson/meson_vclk.c
@@ -496,6 +496,7 @@ void meson_hdmi_pll_set_params(struct meson_drm *priv, unsigned int m,
 		regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x0b3a0400 | m);
 
 		/* Enable and reset */
+		/* TODO: add specific macro for g12a here */
 		regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
 				   0x3 << 28, 0x3 << 28);
 
@@ -970,7 +971,8 @@ void meson_vclk_setup(struct meson_drm *priv, unsigned int target,
 		meson_venci_cvbs_clock_config(priv);
 		return;
 	} else if (target == MESON_VCLK_TARGET_DMT) {
-		/* The DMT clock path is fixed after the PLL:
+		/*
+		 * The DMT clock path is fixed after the PLL:
 		 * - automatic PLL freq + OD management
 		 * - vid_pll_div = VID_PLL_DIV_5
 		 * - vclk_div = 2
diff --git a/drivers/gpu/drm/meson/meson_venc.c b/drivers/gpu/drm/meson/meson_venc.c
index 9defedaac60c..cb569d3104a8 100644
--- a/drivers/gpu/drm/meson/meson_venc.c
+++ b/drivers/gpu/drm/meson/meson_venc.c
@@ -61,9 +61,9 @@
 /* HHI Registers */
 #define HHI_GCLK_MPEG2		0x148 /* 0x52 offset in data sheet */
 #define HHI_VDAC_CNTL0		0x2F4 /* 0xbd offset in data sheet */
-#define HHI_VDAC_CNTL0_G12A	0x2EC /* 0xbd offset in data sheet */
+#define HHI_VDAC_CNTL0_G12A	0x2EC /* 0xbb offset in data sheet */
 #define HHI_VDAC_CNTL1		0x2F8 /* 0xbe offset in data sheet */
-#define HHI_VDAC_CNTL1_G12A	0x2F0 /* 0xbe offset in data sheet */
+#define HHI_VDAC_CNTL1_G12A	0x2F0 /* 0xbc offset in data sheet */
 #define HHI_HDMI_PHY_CNTL0	0x3a0 /* 0xe8 offset in data sheet */
 
 struct meson_cvbs_enci_mode meson_cvbs_enci_pal = {
@@ -1085,7 +1085,8 @@ void meson_venc_hdmi_mode_set(struct meson_drm *priv, int vic,
 		writel_relaxed(vmode->enci.video_mode,
 				priv->io_base + _REG(ENCI_VIDEO_MODE));
 
-		/* Advanced Video Mode :
+		/*
+		 * Advanced Video Mode :
 		 * Demux shifting 0x2
 		 * Blank line end at line17/22
 		 * High bandwidth Luma Filter
@@ -1599,7 +1600,8 @@ void meson_venci_cvbs_mode_set(struct meson_drm *priv,
 	writel_relaxed(mode->video_mode,
 			priv->io_base + _REG(ENCI_VIDEO_MODE));
 
-	/* Advanced Video Mode :
+	/*
+	 * Advanced Video Mode :
 	 * Demux shifting 0x2
 	 * Blank line end at line17/22
 	 * High bandwidth Luma Filter