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-rw-r--r--drivers/gpu/drm/sun4i/sun4i_backend.c98
-rw-r--r--drivers/gpu/drm/sun4i/sun4i_backend.h17
-rw-r--r--drivers/gpu/drm/sun4i/sun4i_layer.c4
3 files changed, 119 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 8aaa74d09954..9bad54f3de38 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -42,6 +42,24 @@ static const u32 sunxi_rgb2yuv_coef[12] = {
0x000001c1, 0x00003e88, 0x00003fb8, 0x00000808
};
+/*
+ * These coefficients are taken from the A33 BSP from Allwinner.
+ *
+ * The formula is for each component, each coefficient being multiplied by
+ * 1024 and each constant being multiplied by 16:
+ * G = 1.164 * Y - 0.391 * U - 0.813 * V + 135
+ * R = 1.164 * Y + 1.596 * V - 222
+ * B = 1.164 * Y + 2.018 * U + 276
+ *
+ * This seems to be a conversion from Y[16:235] UV[16:240] to RGB[0:255],
+ * following the BT601 spec.
+ */
+static const u32 sunxi_bt601_yuv2rgb_coef[12] = {
+ 0x000004a7, 0x00001e6f, 0x00001cbf, 0x00000877,
+ 0x000004a7, 0x00000000, 0x00000662, 0x00003211,
+ 0x000004a7, 0x00000812, 0x00000000, 0x00002eb1,
+};
+
static inline bool sun4i_backend_format_is_planar_yuv(uint32_t format)
{
switch (format) {
@@ -198,6 +216,61 @@ int sun4i_backend_update_layer_coord(struct sun4i_backend *backend,
return 0;
}
+static int sun4i_backend_update_yuv_format(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane)
+{
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+ uint32_t format = fb->format->format;
+ u32 val = SUN4I_BACKEND_IYUVCTL_EN;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sunxi_bt601_yuv2rgb_coef); i++)
+ regmap_write(backend->engine.regs,
+ SUN4I_BACKEND_YGCOEF_REG(i),
+ sunxi_bt601_yuv2rgb_coef[i]);
+
+ /*
+ * We should do that only for a single plane, but the
+ * framebuffer's atomic_check has our back on this.
+ */
+ regmap_update_bits(backend->engine.regs, SUN4I_BACKEND_ATTCTL_REG0(layer),
+ SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN,
+ SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN);
+
+ /* TODO: Add support for the multi-planar YUV formats */
+ if (sun4i_backend_format_is_packed_yuv422(format))
+ val |= SUN4I_BACKEND_IYUVCTL_FBFMT_PACKED_YUV422;
+ else
+ DRM_DEBUG_DRIVER("Unsupported YUV format (0x%x)\n", format);
+
+ /*
+ * Allwinner seems to list the pixel sequence from right to left, while
+ * DRM lists it from left to right.
+ */
+ switch (format) {
+ case DRM_FORMAT_YUYV:
+ val |= SUN4I_BACKEND_IYUVCTL_FBPS_VYUY;
+ break;
+ case DRM_FORMAT_YVYU:
+ val |= SUN4I_BACKEND_IYUVCTL_FBPS_UYVY;
+ break;
+ case DRM_FORMAT_UYVY:
+ val |= SUN4I_BACKEND_IYUVCTL_FBPS_YVYU;
+ break;
+ case DRM_FORMAT_VYUY:
+ val |= SUN4I_BACKEND_IYUVCTL_FBPS_YUYV;
+ break;
+ default:
+ DRM_DEBUG_DRIVER("Unsupported YUV pixel sequence (0x%x)\n",
+ format);
+ }
+
+ regmap_write(backend->engine.regs, SUN4I_BACKEND_IYUVCTL_REG, val);
+
+ return 0;
+}
+
int sun4i_backend_update_layer_formats(struct sun4i_backend *backend,
int layer, struct drm_plane *plane)
{
@@ -207,6 +280,10 @@ int sun4i_backend_update_layer_formats(struct sun4i_backend *backend,
u32 val;
int ret;
+ /* Clear the YUV mode */
+ regmap_update_bits(backend->engine.regs, SUN4I_BACKEND_ATTCTL_REG0(layer),
+ SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN, 0);
+
if (plane->state->crtc)
interlaced = plane->state->crtc->state->adjusted_mode.flags
& DRM_MODE_FLAG_INTERLACE;
@@ -218,6 +295,9 @@ int sun4i_backend_update_layer_formats(struct sun4i_backend *backend,
DRM_DEBUG_DRIVER("Switching display backend interlaced mode %s\n",
interlaced ? "on" : "off");
+ if (sun4i_backend_format_is_yuv(fb->format->format))
+ return sun4i_backend_update_yuv_format(backend, layer, plane);
+
ret = sun4i_backend_drm_format_to_layer(fb->format->format, &val);
if (ret) {
DRM_DEBUG_DRIVER("Invalid format\n");
@@ -255,6 +335,21 @@ int sun4i_backend_update_layer_frontend(struct sun4i_backend *backend,
return 0;
}
+static int sun4i_backend_update_yuv_buffer(struct sun4i_backend *backend,
+ struct drm_framebuffer *fb,
+ dma_addr_t paddr)
+{
+ /* TODO: Add support for the multi-planar YUV formats */
+ DRM_DEBUG_DRIVER("Setting packed YUV buffer address to %pad\n", &paddr);
+ regmap_write(backend->engine.regs, SUN4I_BACKEND_IYUVADD_REG(0), paddr);
+
+ DRM_DEBUG_DRIVER("Layer line width: %d bits\n", fb->pitches[0] * 8);
+ regmap_write(backend->engine.regs, SUN4I_BACKEND_IYUVLINEWIDTH_REG(0),
+ fb->pitches[0] * 8);
+
+ return 0;
+}
+
int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend,
int layer, struct drm_plane *plane)
{
@@ -280,6 +375,9 @@ int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend,
*/
paddr -= PHYS_OFFSET;
+ if (sun4i_backend_format_is_yuv(fb->format->format))
+ return sun4i_backend_update_yuv_buffer(backend, fb, paddr);
+
/* Write the 32 lower bits of the address (in bits) */
lo_paddr = paddr << 3;
DRM_DEBUG_DRIVER("Setting address lower bits to 0x%x\n", lo_paddr);
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.h b/drivers/gpu/drm/sun4i/sun4i_backend.h
index 835408281309..316f2179e9e1 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.h
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.h
@@ -72,6 +72,7 @@
#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL(x) ((x) << 15)
#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PRISEL_MASK GENMASK(11, 10)
#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PRISEL(x) ((x) << 10)
+#define SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN BIT(2)
#define SUN4I_BACKEND_ATTCTL_REG0_LAY_VDOEN BIT(1)
#define SUN4I_BACKEND_ATTCTL_REG1(l) (0x8a0 + (0x4 * (l)))
@@ -110,7 +111,23 @@
#define SUN4I_BACKEND_SPREN_REG 0x900
#define SUN4I_BACKEND_SPRFMTCTL_REG 0x908
#define SUN4I_BACKEND_SPRALPHACTL_REG 0x90c
+
#define SUN4I_BACKEND_IYUVCTL_REG 0x920
+#define SUN4I_BACKEND_IYUVCTL_FBFMT_MASK GENMASK(14, 12)
+#define SUN4I_BACKEND_IYUVCTL_FBFMT_PACKED_YUV444 (4 << 12)
+#define SUN4I_BACKEND_IYUVCTL_FBFMT_PACKED_YUV422 (3 << 12)
+#define SUN4I_BACKEND_IYUVCTL_FBFMT_PLANAR_YUV444 (2 << 12)
+#define SUN4I_BACKEND_IYUVCTL_FBFMT_PLANAR_YUV222 (1 << 12)
+#define SUN4I_BACKEND_IYUVCTL_FBFMT_PLANAR_YUV111 (0 << 12)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_MASK GENMASK(9, 8)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_YVYU (3 << 8)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_VYUY (2 << 8)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_YUYV (1 << 8)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_UYVY (0 << 8)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_VUYA (1 << 8)
+#define SUN4I_BACKEND_IYUVCTL_FBPS_AYUV (0 << 8)
+#define SUN4I_BACKEND_IYUVCTL_EN BIT(0)
+
#define SUN4I_BACKEND_IYUVADD_REG(c) (0x930 + (0x4 * (c)))
#define SUN4I_BACKEND_IYUVLINEWIDTH_REG(c) (0x940 + (0x4 * (c)))
diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c
index 33ad377569ec..2949a3c912c1 100644
--- a/drivers/gpu/drm/sun4i/sun4i_layer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_layer.c
@@ -134,7 +134,11 @@ static const uint32_t sun4i_backend_layer_formats[] = {
DRM_FORMAT_RGBA4444,
DRM_FORMAT_RGB888,
DRM_FORMAT_RGB565,
+ DRM_FORMAT_UYVY,
+ DRM_FORMAT_VYUY,
DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_YUYV,
+ DRM_FORMAT_YVYU,
};
static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 08:00:58 +0000