TI LCD controller version 2 has an extended eleventh
bit that enables horizontal resolutions greater than
1024 pixels to be specified (upto 2048). This patch
adds support for setting this bit on LCDC V2.
Signed-off-by: Darren Etheridge <detheridge@xxxxxx>
---
drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 15 +++++++++++++++
drivers/gpu/drm/tilcdc/tilcdc_regs.h | 1 +
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 5dd3c7d..84fdf25 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -310,6 +310,21 @@ static int tilcdc_crtc_mode_set(struct drm_crtc *crtc,
((vsw & 0x3f) << 10);
tilcdc_write(dev, LCDC_RASTER_TIMING_1_REG, reg);
+ /*
+ * be sure to set Bit 10 for the V2 LCDC controller,
+ * otherwise limited to 1024 pixels width, stopping
+ * 1920x1080 being suppoted.
+ */
+ if (priv->rev == 2) {
+ if ((mode->vdisplay - 1) & 0x400) {
+ tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG,
+ LCDC_LPP_B10);
+ } else {
+ tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG,
+ LCDC_LPP_B10);
+ }
+ }
+
/* Configure display type: */
reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG) &
~(LCDC_TFT_MODE | LCDC_MONO_8BIT_MODE | LCDC_MONOCHROME_MODE |
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_regs.h b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
index 17fd1b4..1bf5e25 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_regs.h
+++ b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
@@ -80,6 +80,7 @@
#define LCDC_INVERT_PIXEL_CLOCK BIT(22)
#define LCDC_INVERT_HSYNC BIT(21)
#define LCDC_INVERT_VSYNC BIT(20)
+#define LCDC_LPP_B10 BIT(26)
/* LCDC Block */
#define LCDC_PID_REG 0x0
--
1.7.0.4
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