From: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
After the recent corrections to the R-Car gen2/3 LVDS startup code, already
similar enough at their ends rcar_lvds_enable_gen{2|3}() started asking for
a merge and it's becoming actually necessary with the addition of the R-Car
V3M (R8A77970) support -- this gen3 SoC has gen2-like LVDPLLCR layout.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Tested-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c | 132 ++++++++++++------------------
1 file changed, 51 insertions(+), 81 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
index 01ef0f728e94..4defa8123eb2 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
@@ -39,102 +39,37 @@ static void rcar_lvds_write(struct rcar_du_lvdsenc *lvds, u32 reg, u32 data)
iowrite32(data, lvds->mmio + reg);
}
-static void rcar_du_lvdsenc_start_gen2(struct rcar_du_lvdsenc *lvds,
- struct rcar_du_crtc *rcrtc)
+static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
{
- const struct drm_display_mode *mode = &rcrtc->crtc.mode;
- unsigned int freq = mode->clock;
- u32 lvdcr0;
- u32 pllcr;
-
- /* PLL clock configuration */
if (freq < 39000)
- pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
+ return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
else if (freq < 61000)
- pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
+ return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
else if (freq < 121000)
- pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
+ return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
else
- pllcr = LVDPLLCR_PLLDLYCNT_150M;
-
- rcar_lvds_write(lvds, LVDPLLCR, pllcr);
-
- /* Select the input and set the LVDS mode. */
- lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
- if (rcrtc->index == 2)
- lvdcr0 |= LVDCR0_DUSEL;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- /* Turn all the channels on. */
- rcar_lvds_write(lvds, LVDCR1,
- LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
- LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
-
- /* Enable LVDS operation and turn bias circuitry on. */
- lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- /*
- * Turn the PLL on, wait for the startup delay, and turn the output
- * on.
- */
- lvdcr0 |= LVDCR0_PLLON;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- usleep_range(100, 150);
-
- lvdcr0 |= LVDCR0_LVRES;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ return LVDPLLCR_PLLDLYCNT_150M;
}
-static void rcar_du_lvdsenc_start_gen3(struct rcar_du_lvdsenc *lvds,
- struct rcar_du_crtc *rcrtc)
+static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
{
- const struct drm_display_mode *mode = &rcrtc->crtc.mode;
- unsigned int freq = mode->clock;
- u32 lvdcr0;
- u32 pllcr;
-
- /* Set the PLL clock configuration and LVDS mode. */
if (freq < 42000)
- pllcr = LVDPLLCR_PLLDIVCNT_42M;
+ return LVDPLLCR_PLLDIVCNT_42M;
else if (freq < 85000)
- pllcr = LVDPLLCR_PLLDIVCNT_85M;
+ return LVDPLLCR_PLLDIVCNT_85M;
else if (freq < 128000)
- pllcr = LVDPLLCR_PLLDIVCNT_128M;
+ return LVDPLLCR_PLLDIVCNT_128M;
else
- pllcr = LVDPLLCR_PLLDIVCNT_148M;
-
- rcar_lvds_write(lvds, LVDPLLCR, pllcr);
-
- lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- /* Turn all the channels on. */
- rcar_lvds_write(lvds, LVDCR1,
- LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
- LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
-
- /*
- * Turn the PLL on, set it to LVDS normal mode, wait for the startup
- * delay and turn the output on.
- */
- lvdcr0 |= LVDCR0_PLLON;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- lvdcr0 |= LVDCR0_PWD;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- usleep_range(100, 150);
-
- lvdcr0 |= LVDCR0_LVRES;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ return LVDPLLCR_PLLDIVCNT_148M;
}
static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds,
struct rcar_du_crtc *rcrtc)
{
+ const struct drm_display_mode *mode = &rcrtc->crtc.mode;
+ u32 lvdpllcr;
u32 lvdhcr;
+ u32 lvdcr0;
int ret;
if (lvds->enabled)
@@ -165,11 +100,46 @@ static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds,
rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
- /* Perform generation-specific initialization. */
+ /* PLL clock configuration. */
if (lvds->dev->info->gen < 3)
- rcar_du_lvdsenc_start_gen2(lvds, rcrtc);
+ lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
else
- rcar_du_lvdsenc_start_gen3(lvds, rcrtc);
+ lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
+ rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
+
+ /* Set the LVDS mode and select the input. */
+ lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
+ if (rcrtc->index == 2)
+ lvdcr0 |= LVDCR0_DUSEL;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ /* Turn all the channels on. */
+ rcar_lvds_write(lvds, LVDCR1,
+ LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
+ LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
+
+ if (lvds->dev->info->gen < 3) {
+ /* Enable LVDS operation and turn the bias circuitry on. */
+ lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ }
+
+ /* Turn the PLL on. */
+ lvdcr0 |= LVDCR0_PLLON;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ if (lvds->dev->info->gen > 2) {
+ /* Set LVDS normal mode. */
+ lvdcr0 |= LVDCR0_PWD;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ }
+
+ /* Wait for the startup delay. */
+ usleep_range(100, 150);
+
+ /* Turn the output on. */
+ lvdcr0 |= LVDCR0_LVRES;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
lvds->enabled = true;
--
Regards,
Laurent Pinchart
