drm: renesas: shmobile: Improve shmob_drm_format_info table

Improve the table containing hardware information related to the
supported plane formats:
  1. Move (part of) the overlay format register settings from multiple
     switch() statements spread across the code into the table, like is
     already done for the primary plane register settings,
  2. Remove the .yuv field, as that information can easily be extracted
     from the register settings using a new helper macro,
  3. Shrink and move the .bpp field to reduce table size.
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/b41f755e80ffe5fb4adbb2d8f96f2073de5c33bc.1694767209.git.geert+renesas@glider.be

drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c

@@ -191,31 +191,12 @@ static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 	lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
 	lcdc_write(sdev, LDMLSR, scrtc->line_size);
 	lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
-	if (format->yuv)
+	if (shmob_drm_format_is_yuv(format))
 		lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
 	lcdc_write(sdev, LDSM1R, 0);
 
 	/* Word and long word swap. */
-	switch (format->fourcc) {
-	case DRM_FORMAT_RGB565:
-	case DRM_FORMAT_NV21:
-	case DRM_FORMAT_NV61:
-	case DRM_FORMAT_NV42:
-		value = LDDDSR_LS | LDDDSR_WS;
-		break;
-	case DRM_FORMAT_RGB888:
-	case DRM_FORMAT_NV12:
-	case DRM_FORMAT_NV16:
-	case DRM_FORMAT_NV24:
-		value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
-		break;
-	case DRM_FORMAT_ARGB8888:
-	case DRM_FORMAT_XRGB8888:
-	default:
-		value = LDDDSR_LS;
-		break;
-	}
-	lcdc_write(sdev, LDDDSR, value);
+	lcdc_write(sdev, LDDDSR, format->ldddsr);
 
 	/* Setup planes. */
 	drm_for_each_legacy_plane(plane, dev) {
@@ -271,12 +252,12 @@ static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
 	struct drm_gem_dma_object *gem;
 	unsigned int bpp;
 
-	bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
+	bpp = shmob_drm_format_is_yuv(scrtc->format) ? 8 : scrtc->format->bpp;
 	gem = drm_fb_dma_get_gem_obj(fb, 0);
 	scrtc->dma[0] = gem->dma_addr + fb->offsets[0]
 		      + y * fb->pitches[0] + x * bpp / 8;
 
-	if (scrtc->format->yuv) {
+	if (shmob_drm_format_is_yuv(scrtc->format)) {
 		bpp = scrtc->format->bpp - 8;
 		gem = drm_fb_dma_get_gem_obj(fb, 1);
 		scrtc->dma[1] = gem->dma_addr + fb->offsets[1]
@@ -293,7 +274,7 @@ static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
 	shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
 
 	lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
-	if (scrtc->format->yuv)
+	if (shmob_drm_format_is_yuv(scrtc->format))
 		lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
 
 	lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);

drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c

@@ -27,53 +27,73 @@ static const struct shmob_drm_format_info shmob_drm_format_infos[] = {
 	{
 		.fourcc = DRM_FORMAT_RGB565,
 		.bpp = 16,
-		.yuv = false,
 		.lddfr = LDDFR_PKF_RGB16,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16,
 	}, {
 		.fourcc = DRM_FORMAT_RGB888,
 		.bpp = 24,
-		.yuv = false,
 		.lddfr = LDDFR_PKF_RGB24,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_SWPB | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24,
 	}, {
 		.fourcc = DRM_FORMAT_ARGB8888,
 		.bpp = 32,
-		.yuv = false,
 		.lddfr = LDDFR_PKF_ARGB32,
+		.ldddsr = LDDDSR_LS,
+		.ldbbsifr = LDBBSIFR_AL_PK | LDBBSIFR_SWPL | LDBBSIFR_RY |
+			    LDBBSIFR_RPKF_ARGB32,
 	}, {
 		.fourcc = DRM_FORMAT_XRGB8888,
 		.bpp = 32,
-		.yuv = false,
 		.lddfr = LDDFR_PKF_ARGB32,
+		.ldddsr = LDDDSR_LS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_RY |
+			    LDBBSIFR_RPKF_ARGB32,
 	}, {
 		.fourcc = DRM_FORMAT_NV12,
 		.bpp = 12,
-		.yuv = true,
 		.lddfr = LDDFR_CC | LDDFR_YF_420,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_SWPB | LDBBSIFR_CHRR_420,
 	}, {
 		.fourcc = DRM_FORMAT_NV21,
 		.bpp = 12,
-		.yuv = true,
 		.lddfr = LDDFR_CC | LDDFR_YF_420,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_CHRR_420,
 	}, {
 		.fourcc = DRM_FORMAT_NV16,
 		.bpp = 16,
-		.yuv = true,
 		.lddfr = LDDFR_CC | LDDFR_YF_422,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_SWPB | LDBBSIFR_CHRR_422,
 	}, {
 		.fourcc = DRM_FORMAT_NV61,
 		.bpp = 16,
-		.yuv = true,
 		.lddfr = LDDFR_CC | LDDFR_YF_422,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_CHRR_422,
 	}, {
 		.fourcc = DRM_FORMAT_NV24,
 		.bpp = 24,
-		.yuv = true,
 		.lddfr = LDDFR_CC | LDDFR_YF_444,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_SWPB | LDBBSIFR_CHRR_444,
 	}, {
 		.fourcc = DRM_FORMAT_NV42,
 		.bpp = 24,
-		.yuv = true,
 		.lddfr = LDDFR_CC | LDDFR_YF_444,
+		.ldddsr = LDDDSR_LS | LDDDSR_WS,
+		.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
+			    LDBBSIFR_CHRR_444,
 	},
 };
 
@@ -112,7 +132,7 @@ shmob_drm_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 		return ERR_PTR(-EINVAL);
 	}
 
-	if (format->yuv) {
+	if (shmob_drm_format_is_yuv(format)) {
 		unsigned int chroma_cpp = format->bpp == 24 ? 2 : 1;
 
 		if (mode_cmd->pitches[1] != mode_cmd->pitches[0] * chroma_cpp) {

drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.h

@@ -17,11 +17,14 @@ struct shmob_drm_device;
 
 struct shmob_drm_format_info {
 	u32 fourcc;
-	unsigned int bpp;
-	bool yuv;
-	u32 lddfr;
+	u32 lddfr;	/* LCD Data Format Register */
+	u16 ldbbsifr;	/* CHn Source Image Format Register low bits */
+	u8 ldddsr;	/* LCDC Input Image Data Swap Register low bits */
+	u8 bpp;
 };
 
+#define shmob_drm_format_is_yuv(format)	((format)->lddfr & LDDFR_CC)
+
 const struct shmob_drm_format_info *shmob_drm_format_info(u32 fourcc);
 
 int shmob_drm_modeset_init(struct shmob_drm_device *sdev);

drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c

@@ -43,12 +43,12 @@ static void shmob_drm_plane_compute_base(struct shmob_drm_plane *splane,
 	struct drm_gem_dma_object *gem;
 	unsigned int bpp;
 
-	bpp = splane->format->yuv ? 8 : splane->format->bpp;
+	bpp = shmob_drm_format_is_yuv(splane->format) ? 8 : splane->format->bpp;
 	gem = drm_fb_dma_get_gem_obj(fb, 0);
 	splane->dma[0] = gem->dma_addr + fb->offsets[0]
 		       + y * fb->pitches[0] + x * bpp / 8;
 
-	if (splane->format->yuv) {
+	if (shmob_drm_format_is_yuv(splane->format)) {
 		bpp = splane->format->bpp - 8;
 		gem = drm_fb_dma_get_gem_obj(fb, 1);
 		splane->dma[1] = gem->dma_addr + fb->offsets[1]
@@ -64,54 +64,8 @@ static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
 	u32 format;
 
 	/* TODO: Support ROP3 mode */
-	format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT);
-
-	switch (splane->format->fourcc) {
-	case DRM_FORMAT_RGB565:
-	case DRM_FORMAT_NV21:
-	case DRM_FORMAT_NV61:
-	case DRM_FORMAT_NV42:
-		format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
-		break;
-	case DRM_FORMAT_RGB888:
-	case DRM_FORMAT_NV12:
-	case DRM_FORMAT_NV16:
-	case DRM_FORMAT_NV24:
-		format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
-		break;
-	case DRM_FORMAT_ARGB8888:
-	case DRM_FORMAT_XRGB8888:
-	default:
-		format |= LDBBSIFR_SWPL;
-		break;
-	}
-
-	switch (splane->format->fourcc) {
-	case DRM_FORMAT_RGB565:
-		format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
-		break;
-	case DRM_FORMAT_RGB888:
-		format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
-		break;
-	case DRM_FORMAT_ARGB8888:
-		format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDBBSIFR_RPKF_ARGB32;
-		break;
-	case DRM_FORMAT_XRGB8888:
-		format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_ARGB32;
-		break;
-	case DRM_FORMAT_NV12:
-	case DRM_FORMAT_NV21:
-		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
-		break;
-	case DRM_FORMAT_NV16:
-	case DRM_FORMAT_NV61:
-		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
-		break;
-	case DRM_FORMAT_NV24:
-	case DRM_FORMAT_NV42:
-		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
-		break;
-	}
+	format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT) |
+		 splane->format->ldbbsifr;
 
 #define plane_reg_dump(sdev, splane, reg) \
 	dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
@@ -144,7 +98,7 @@ static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
 	shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
 
 	lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
-	if (splane->format->yuv)
+	if (shmob_drm_format_is_yuv(splane->format))
 		lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
 
 	lcdc_write(sdev, LDBCR,