Since version 4 of eLCDIF, there are some registers that can do
transformations on the input data, like re-arranging the pixel
components. By doing that, we can support more pixel formats.
This patch adds support for X/ABGR and RGBX/A. Although, the local alpha
is not supported by eLCDIF, the alpha pixel formats were added to the
supported pixel formats but it will be ignored. This was necessary since
there are systems (like Android) that requires such pixel formats.
Signed-off-by: Robert Chiras <robert.chiras@xxxxxxx>
---
drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 108 ++++++++++++++++++++++++++++---------
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 25 ++++++---
drivers/gpu/drm/mxsfb/mxsfb_drv.h | 3 +-
drivers/gpu/drm/mxsfb/mxsfb_regs.h | 100 ++++++++++++++++++++--------------
4 files changed, 166 insertions(+), 70 deletions(-)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
index 3210be9..2fdb268 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
@@ -48,15 +48,35 @@ static u32 set_hsync_pulse_width(struct mxsfb_drm_private *mxsfb, u32 val)
mxsfb->devdata->hs_wdth_shift;
}
+/* Print Four-character-code (FOURCC) */
+static char *fourcc_to_str(u32 fmt)
+{
+ /* Use 10 chars so we can simultaneously print two codes */
+ static char code[10], *c = &code[0];
+
+ if (c == &code[10])
+ c = &code[0];
+
+ *(c++) = (unsigned char)(fmt & 0xff);
+ *(c++) = (unsigned char)((fmt >> 8) & 0xff);
+ *(c++) = (unsigned char)((fmt >> 16) & 0xff);
+ *(c++) = (unsigned char)((fmt >> 24) & 0xff);
+ *(c++) = '\0';
+
+ return (c - 5);
+}
+
/* Setup the MXSFB registers for decoding the pixels out of the framebuffer */
-static int mxsfb_set_pixel_fmt(struct mxsfb_drm_private *mxsfb)
+static int mxsfb_set_pixel_fmt(struct mxsfb_drm_private *mxsfb, bool update)
{
struct drm_crtc *crtc = &mxsfb->pipe.crtc;
struct drm_device *drm = crtc->dev;
const u32 format = crtc->primary->state->fb->format->format;
- u32 ctrl, ctrl1;
+ u32 ctrl = 0, ctrl1 = 0;
+ bool bgr_format = true;
- ctrl = CTRL_BYPASS_COUNT | CTRL_MASTER;
+ if (!update)
+ ctrl = CTRL_BYPASS_COUNT | CTRL_MASTER;
/*
* WARNING: The bus width, CTRL_SET_BUS_WIDTH(), is configured to
@@ -65,31 +85,69 @@ static int mxsfb_set_pixel_fmt(struct mxsfb_drm_private *mxsfb)
* to arbitrary value. This limitation should not pose an issue.
*/
- /* CTRL1 contains IRQ config and status bits, preserve those. */
- ctrl1 = readl(mxsfb->base + LCDC_CTRL1);
- ctrl1 &= CTRL1_CUR_FRAME_DONE_IRQ_EN | CTRL1_CUR_FRAME_DONE_IRQ;
+ if (!update) {
+ /* CTRL1 contains IRQ config and status bits, preserve those. */
+ ctrl1 = readl(mxsfb->base + LCDC_CTRL1);
+ ctrl1 &= CTRL1_CUR_FRAME_DONE_IRQ_EN | CTRL1_CUR_FRAME_DONE_IRQ;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(drm->dev, "Setting up %s mode\n",
+ fourcc_to_str(format));
+
+ /* Do some clean-up that we might have from a previous mode */
+ ctrl &= ~CTRL_SHIFT_DIR(1);
+ ctrl &= ~CTRL_SHIFT_NUM(0x3f);
+ if (mxsfb->devdata->ipversion >= 4)
+ writel(CTRL2_ODD_LINE_PATTERN(0x7) |
+ CTRL2_EVEN_LINE_PATTERN(0x7),
+ mxsfb->base + LCDC_V4_CTRL2 + REG_CLR);
switch (format) {
case DRM_FORMAT_RGB565:
- dev_dbg(drm->dev, "Setting up RGB565 mode\n");
ctrl |= CTRL_SET_WORD_LENGTH(0);
ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0xf);
break;
+ case DRM_FORMAT_RGBX8888:
+ case DRM_FORMAT_RGBA8888:
+ /* RGBX - > 0RGB */
+ ctrl |= CTRL_SHIFT_DIR(1);
+ ctrl |= CTRL_SHIFT_NUM(8);
+ bgr_format = false;
+ /* Fall through */
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_ABGR8888:
+ if (bgr_format) {
+ if (mxsfb->devdata->ipversion < 4)
+ goto err;
+ writel(CTRL2_ODD_LINE_PATTERN(0x5) |
+ CTRL2_EVEN_LINE_PATTERN(0x5),
+ mxsfb->base + LCDC_V4_CTRL2 + REG_SET);
+ }
+ /* Fall through */
case DRM_FORMAT_XRGB8888:
- dev_dbg(drm->dev, "Setting up XRGB8888 mode\n");
+ case DRM_FORMAT_ARGB8888:
ctrl |= CTRL_SET_WORD_LENGTH(3);
/* Do not use packed pixels = one pixel per word instead. */
ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0x7);
break;
default:
- dev_err(drm->dev, "Unhandled pixel format %08x\n", format);
- return -EINVAL;
+ goto err;
}
- writel(ctrl1, mxsfb->base + LCDC_CTRL1);
- writel(ctrl, mxsfb->base + LCDC_CTRL);
+ if (update) {
+ writel(ctrl, mxsfb->base + LCDC_CTRL + REG_SET);
+ writel(ctrl1, mxsfb->base + LCDC_CTRL1 + REG_SET);
+ } else {
+ writel(ctrl, mxsfb->base + LCDC_CTRL);
+ writel(ctrl1, mxsfb->base + LCDC_CTRL1);
+ }
return 0;
+
+err:
+ DRM_DEV_ERROR(drm->dev, "Unhandled pixel format: %s\n",
+ fourcc_to_str(format));
+ return -EINVAL;
}
static void mxsfb_set_bus_fmt(struct mxsfb_drm_private *mxsfb)
@@ -97,9 +155,7 @@ static void mxsfb_set_bus_fmt(struct mxsfb_drm_private *mxsfb)
struct drm_crtc *crtc = &mxsfb->pipe.crtc;
struct drm_device *drm = crtc->dev;
u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
- u32 reg;
-
- reg = readl(mxsfb->base + LCDC_CTRL);
+ u32 reg = 0;
if (mxsfb->connector->display_info.num_bus_formats)
bus_format = mxsfb->connector->display_info.bus_formats[0];
@@ -107,22 +163,21 @@ static void mxsfb_set_bus_fmt(struct mxsfb_drm_private *mxsfb)
DRM_DEV_DEBUG_DRIVER(drm->dev,
"Using bus_format: 0x%08X\n", bus_format);
- reg &= ~CTRL_BUS_WIDTH_MASK;
switch (bus_format) {
case MEDIA_BUS_FMT_RGB565_1X16:
- reg |= CTRL_SET_BUS_WIDTH(STMLCDIF_16BIT);
+ reg = CTRL_SET_BUS_WIDTH(STMLCDIF_16BIT);
break;
case MEDIA_BUS_FMT_RGB666_1X18:
- reg |= CTRL_SET_BUS_WIDTH(STMLCDIF_18BIT);
+ reg = CTRL_SET_BUS_WIDTH(STMLCDIF_18BIT);
break;
case MEDIA_BUS_FMT_RGB888_1X24:
- reg |= CTRL_SET_BUS_WIDTH(STMLCDIF_24BIT);
+ reg = CTRL_SET_BUS_WIDTH(STMLCDIF_24BIT);
break;
default:
dev_err(drm->dev, "Unknown media bus format %d\n", bus_format);
break;
}
- writel(reg, mxsfb->base + LCDC_CTRL);
+ writel(reg, mxsfb->base + LCDC_CTRL + REG_SET);
}
static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb)
@@ -133,8 +188,9 @@ static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb)
clk_prepare_enable(mxsfb->clk_disp_axi);
clk_prepare_enable(mxsfb->clk);
- writel(CTRL2_OUTSTANDING_REQS__REQ_16,
- mxsfb->base + LCDC_V4_CTRL2 + REG_SET);
+ if (mxsfb->devdata->ipversion >= 4)
+ writel(CTRL2_OUTSTANDING_REQS(REQ_16),
+ mxsfb->base + LCDC_V4_CTRL2 + REG_SET);
/* If it was disabled, re-enable the mode again */
writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_SET);
@@ -152,6 +208,10 @@ static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb)
{
u32 reg;
+ if (mxsfb->devdata->ipversion >= 4)
+ writel(CTRL2_OUTSTANDING_REQS(0x7),
+ mxsfb->base + LCDC_V4_CTRL2 + REG_CLR);
+
writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_CLR);
/*
@@ -239,7 +299,7 @@ static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb)
/* Clear the FIFOs */
writel(CTRL1_FIFO_CLEAR, mxsfb->base + LCDC_CTRL1 + REG_SET);
- err = mxsfb_set_pixel_fmt(mxsfb);
+ err = mxsfb_set_pixel_fmt(mxsfb, false);
if (err)
return;
@@ -324,7 +384,7 @@ void mxsfb_crtc_disable(struct mxsfb_drm_private *mxsfb)
}
void mxsfb_plane_atomic_update(struct mxsfb_drm_private *mxsfb,
- struct drm_plane_state *state)
+ struct drm_plane_state *old_state)
{
struct drm_simple_display_pipe *pipe = &mxsfb->pipe;
struct drm_crtc *crtc = &pipe->crtc;
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
index c0b6198..bc1b750 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -48,6 +48,22 @@ enum mxsfb_devtype {
MXSFB_V4,
};
+/*
+ * When adding new formats, make sure to update the num_formats from
+ * mxsfb_devdata below.
+ */
+static const uint32_t mxsfb_formats[] = {
+ /* MXSFB_V3 */
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_RGB565,
+ /* MXSFB_V4 */
+ DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_ABGR8888,
+ DRM_FORMAT_RGBX8888,
+ DRM_FORMAT_RGBA8888,
+};
+
static const struct mxsfb_devdata mxsfb_devdata[] = {
[MXSFB_V3] = {
.transfer_count = LCDC_V3_TRANSFER_COUNT,
@@ -57,6 +73,7 @@ static const struct mxsfb_devdata mxsfb_devdata[] = {
.hs_wdth_mask = 0xff,
.hs_wdth_shift = 24,
.ipversion = 3,
+ .num_formats = 3,
},
[MXSFB_V4] = {
.transfer_count = LCDC_V4_TRANSFER_COUNT,
@@ -66,14 +83,10 @@ static const struct mxsfb_devdata mxsfb_devdata[] = {
.hs_wdth_mask = 0x3fff,
.hs_wdth_shift = 18,
.ipversion = 4,
+ .num_formats = ARRAY_SIZE(mxsfb_formats),
},
};
-static const uint32_t mxsfb_formats[] = {
- DRM_FORMAT_XRGB8888,
- DRM_FORMAT_RGB565
-};
-
static struct mxsfb_drm_private *
drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
{
@@ -250,7 +263,7 @@ static int mxsfb_load(struct drm_device *drm, unsigned long flags)
}
ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
- mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
+ mxsfb_formats, mxsfb->devdata->num_formats, NULL,
mxsfb->connector);
if (ret < 0) {
dev_err(drm->dev, "Cannot setup simple display pipe\n");
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.h b/drivers/gpu/drm/mxsfb/mxsfb_drv.h
index 71238ad..8b6f332 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.h
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.h
@@ -24,6 +24,7 @@ struct mxsfb_devdata {
unsigned int hs_wdth_mask;
unsigned int hs_wdth_shift;
unsigned int ipversion;
+ unsigned int num_formats;
};
struct mxsfb_drm_private {
@@ -51,6 +52,6 @@ void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb);
void mxsfb_crtc_enable(struct mxsfb_drm_private *mxsfb);
void mxsfb_crtc_disable(struct mxsfb_drm_private *mxsfb);
void mxsfb_plane_atomic_update(struct mxsfb_drm_private *mxsfb,
- struct drm_plane_state *state);
+ struct drm_plane_state *old_state);
#endif /* __MXSFB_DRV_H__ */
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_regs.h b/drivers/gpu/drm/mxsfb/mxsfb_regs.h
index c5b5e40..4904fdd 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_regs.h
+++ b/drivers/gpu/drm/mxsfb/mxsfb_regs.h
@@ -48,54 +48,76 @@
#define LCDC_AS_BUF 0x220
#define LCDC_AS_NEXT_BUF 0x230
-#define CTRL_SFTRST (1 << 31)
-#define CTRL_CLKGATE (1 << 30)
-#define CTRL_BYPASS_COUNT (1 << 19)
-#define CTRL_VSYNC_MODE (1 << 18)
-#define CTRL_DOTCLK_MODE (1 << 17)
-#define CTRL_DATA_SELECT (1 << 16)
-#define CTRL_SET_BUS_WIDTH(x) (((x) & 0x3) << 10)
-#define CTRL_GET_BUS_WIDTH(x) (((x) >> 10) & 0x3)
-#define CTRL_BUS_WIDTH_MASK (0x3 << 10)
-#define CTRL_SET_WORD_LENGTH(x) (((x) & 0x3) << 8)
-#define CTRL_GET_WORD_LENGTH(x) (((x) >> 8) & 0x3)
-#define CTRL_MASTER (1 << 5)
-#define CTRL_DF16 (1 << 3)
-#define CTRL_DF18 (1 << 2)
-#define CTRL_DF24 (1 << 1)
-#define CTRL_RUN (1 << 0)
-
-#define CTRL1_RECOVERY_ON_UNDERFLOW (1 << 24)
-#define CTRL1_FIFO_CLEAR (1 << 21)
-#define CTRL1_SET_BYTE_PACKAGING(x) (((x) & 0xf) << 16)
-#define CTRL1_GET_BYTE_PACKAGING(x) (((x) >> 16) & 0xf)
-#define CTRL1_CUR_FRAME_DONE_IRQ_EN (1 << 13)
-#define CTRL1_CUR_FRAME_DONE_IRQ (1 << 9)
-
-#define CTRL2_OUTSTANDING_REQS__REQ_16 (4 << 21)
+/* reg bit manipulation */
+#define REG_MASK(e, s) (((1 << ((e) - (s) + 1)) - 1) << (s))
+#define REG_PUT(x, e, s) (((x) << (s)) & REG_MASK(e, s))
+#define REG_GET(x, e, s) (((x) & REG_MASK(e, s)) >> (s))
+
+#define SWIZZLE_LE 0 /* Little-Endian or No swap */
+#define SWIZZLE_BE 1 /* Big-Endian or swap all */
+#define SWIZZLE_HWD 2 /* Swap half-words */
+#define SWIZZLE_HWD_BYTE 3 /* Swap bytes within each half-word */
+
+#define CTRL_SFTRST BIT(31)
+#define CTRL_CLKGATE BIT(30)
+#define CTRL_SHIFT_DIR(x) REG_PUT((x), 26, 26)
+#define CTRL_SHIFT_NUM(x) REG_PUT((x), 25, 21)
+#define CTRL_BYPASS_COUNT BIT(19)
+#define CTRL_VSYNC_MODE BIT(18)
+#define CTRL_DOTCLK_MODE BIT(17)
+#define CTRL_DATA_SELECT BIT(16)
+#define CTRL_INPUT_SWIZZLE(x) REG_PUT((x), 15, 14)
+#define CTRL_CSC_SWIZZLE(x) REG_PUT((x), 13, 12)
+#define CTRL_SET_BUS_WIDTH(x) REG_PUT((x), 11, 10)
+#define CTRL_GET_BUS_WIDTH(x) REG_GET((x), 11, 10)
+#define CTRL_BUS_WIDTH_MASK REG_PUT((0x3), 11, 10)
+#define CTRL_SET_WORD_LENGTH(x) REG_PUT((x), 9, 8)
+#define CTRL_GET_WORD_LENGTH(x) REG_GET((x), 9, 8)
+#define CTRL_MASTER BIT(5)
+#define CTRL_DF16 BIT(3)
+#define CTRL_DF18 BIT(2)
+#define CTRL_DF24 BIT(1)
+#define CTRL_RUN BIT(0)
+
+#define CTRL1_RECOVERY_ON_UNDERFLOW BIT(24)
+#define CTRL1_FIFO_CLEAR BIT(21)
+#define CTRL1_SET_BYTE_PACKAGING(x) REG_PUT((x), 19, 16)
+#define CTRL1_GET_BYTE_PACKAGING(x) REG_GET((x), 19, 16)
+#define CTRL1_CUR_FRAME_DONE_IRQ_EN BIT(13)
+#define CTRL1_CUR_FRAME_DONE_IRQ BIT(9)
+
+#define REQ_1 0
+#define REQ_2 1
+#define REQ_4 2
+#define REQ_8 3
+#define REQ_16 4
+
+#define CTRL2_OUTSTANDING_REQS(x) REG_PUT((x), 23, 21)
+#define CTRL2_ODD_LINE_PATTERN(x) REG_PUT((x), 18, 16)
+#define CTRL2_EVEN_LINE_PATTERN(x) REG_PUT((x), 14, 12)
#define TRANSFER_COUNT_SET_VCOUNT(x) (((x) & 0xffff) << 16)
#define TRANSFER_COUNT_GET_VCOUNT(x) (((x) >> 16) & 0xffff)
#define TRANSFER_COUNT_SET_HCOUNT(x) ((x) & 0xffff)
#define TRANSFER_COUNT_GET_HCOUNT(x) ((x) & 0xffff)
-#define VDCTRL0_ENABLE_PRESENT (1 << 28)
-#define VDCTRL0_VSYNC_ACT_HIGH (1 << 27)
-#define VDCTRL0_HSYNC_ACT_HIGH (1 << 26)
-#define VDCTRL0_DOTCLK_ACT_FALLING (1 << 25)
-#define VDCTRL0_ENABLE_ACT_HIGH (1 << 24)
-#define VDCTRL0_VSYNC_PERIOD_UNIT (1 << 21)
-#define VDCTRL0_VSYNC_PULSE_WIDTH_UNIT (1 << 20)
-#define VDCTRL0_HALF_LINE (1 << 19)
-#define VDCTRL0_HALF_LINE_MODE (1 << 18)
+#define VDCTRL0_ENABLE_PRESENT BIT(28)
+#define VDCTRL0_VSYNC_ACT_HIGH BIT(27)
+#define VDCTRL0_HSYNC_ACT_HIGH BIT(26)
+#define VDCTRL0_DOTCLK_ACT_FALLING BIT(25)
+#define VDCTRL0_ENABLE_ACT_HIGH BIT(24)
+#define VDCTRL0_VSYNC_PERIOD_UNIT BIT(21)
+#define VDCTRL0_VSYNC_PULSE_WIDTH_UNIT BIT(20)
+#define VDCTRL0_HALF_LINE BIT(19)
+#define VDCTRL0_HALF_LINE_MODE BIT(18)
#define VDCTRL0_SET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff)
#define VDCTRL0_GET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff)
#define VDCTRL2_SET_HSYNC_PERIOD(x) ((x) & 0x3ffff)
#define VDCTRL2_GET_HSYNC_PERIOD(x) ((x) & 0x3ffff)
-#define VDCTRL3_MUX_SYNC_SIGNALS (1 << 29)
-#define VDCTRL3_VSYNC_ONLY (1 << 28)
+#define VDCTRL3_MUX_SYNC_SIGNALS BIT(29)
+#define VDCTRL3_VSYNC_ONLY BIT(28)
#define SET_HOR_WAIT_CNT(x) (((x) & 0xfff) << 16)
#define GET_HOR_WAIT_CNT(x) (((x) >> 16) & 0xfff)
#define SET_VERT_WAIT_CNT(x) ((x) & 0xffff)
@@ -103,7 +125,7 @@
#define VDCTRL4_SET_DOTCLK_DLY(x) (((x) & 0x7) << 29) /* v4 only */
#define VDCTRL4_GET_DOTCLK_DLY(x) (((x) >> 29) & 0x7) /* v4 only */
-#define VDCTRL4_SYNC_SIGNALS_ON (1 << 18)
+#define VDCTRL4_SYNC_SIGNALS_ON BIT(18)
#define SET_DOTCLK_H_VALID_DATA_CNT(x) ((x) & 0x3ffff)
#define DEBUG0_HSYNC (1 < 26)
@@ -124,7 +146,7 @@
#define STMLCDIF_18BIT 2 /* pixel data bus to the display is of 18 bit width */
#define STMLCDIF_24BIT 3 /* pixel data bus to the display is of 24 bit width */
-#define MXSFB_SYNC_DATA_ENABLE_HIGH_ACT (1 << 6)
-#define MXSFB_SYNC_DOTCLK_FALLING_ACT (1 << 7) /* negative edge sampling */
+#define MXSFB_SYNC_DATA_ENABLE_HIGH_ACT BIT(6)
+#define MXSFB_SYNC_DOTCLK_FALLING_ACT BIT(7) /* negative edge sampling */
#endif /* __MXSFB_REGS_H__ */
--
2.7.4
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