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.
BTW, such a merge saves 64 bytes of the object code with AArch64 gcc 4.8.5.
Signed-off-by: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
---
drivers/gpu/drm/rcar-du/rcar_lvds.c | 137 +++++++++++++++---------------------
1 file changed, 59 insertions(+), 78 deletions(-)
Index: linux/drivers/gpu/drm/rcar-du/rcar_lvds.c
===================================================================
--- linux.orig/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ linux/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -125,98 +125,46 @@ static const struct drm_connector_funcs
* Bridge
*/
-static void rcar_lvds_enable_gen2(struct rcar_lvds *lvds)
+static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
{
- const struct drm_display_mode *mode = &lvds->display_mode;
- /*
- * FIXME: We should really retrieve this through the state, but how do
- * we get a state pointer?
- */
- struct drm_crtc *crtc = lvds->bridge.encoder->crtc;
- unsigned int freq = mode->clock;
- u32 lvdcr0;
- u32 pllcr;
+ u32 lvdpllcr;
- /* PLL clock configuration */
if (freq < 39000)
- pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
+ lvdpllcr = LVDPLLCR_PLLDLYCNT_38M;
else if (freq < 61000)
- pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
+ lvdpllcr = LVDPLLCR_PLLDLYCNT_60M;
else if (freq < 121000)
- pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL |
LVDPLLCR_PLLDLYCNT_121M;
+ lvdpllcr = LVDPLLCR_PLLDLYCNT_121M;
else
- pllcr = LVDPLLCR_PLLDLYCNT_150M;
-
- rcar_lvds_write(lvds, LVDPLLCR, pllcr);
-
- /* Turn all the channels on. */
- rcar_lvds_write(lvds, LVDCR1, LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
- LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
-
- /*
- * Set the LVDS mode, select the input, enable LVDS operation,
- * and turn bias circuitry on.
- */
- lvdcr0 = (lvds->mode << LVDCR0_LVMD_SHIFT) | LVDCR0_BEN | LVDCR0_LVEN;
- if (drm_crtc_index(crtc) == 2)
- lvdcr0 |= LVDCR0_DUSEL;
- 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);
+ return LVDPLLCR_PLLDLYCNT_150M;
- usleep_range(100, 150);
-
- lvdcr0 |= LVDCR0_LVRES;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ return lvdpllcr | LVDPLLCR_CEEN | LVDPLLCR_COSEL;
}
-static void rcar_lvds_enable_gen3(struct rcar_lvds *lvds)
+static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
{
- const struct drm_display_mode *mode = &lvds->display_mode;
- unsigned int freq = mode->clock;
- u32 lvdcr0;
- u32 pllcr;
-
- /* PLL clock configuration */
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;
- else
- pllcr = LVDPLLCR_PLLDIVCNT_148M;
-
- rcar_lvds_write(lvds, LVDPLLCR, pllcr);
-
- /* Turn all the channels on. */
- rcar_lvds_write(lvds, LVDCR1, LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
- LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
+ return LVDPLLCR_PLLDIVCNT_128M;
- /*
- * Turn the PLL on, set it to LVDS normal mode, wait for the startup
- * delay and turn the output on.
- */
- lvdcr0 = (lvds->mode << LVDCR0_LVMD_SHIFT) | 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 void rcar_lvds_enable(struct drm_bridge *bridge)
{
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+ /*
+ * FIXME: We should really retrieve this through the state, but how do
+ * we get a state pointer?
+ */
+ struct drm_crtc *crtc = lvds->bridge.encoder->crtc;
+ const struct drm_display_mode *mode = &lvds->display_mode;
+ unsigned int gen = lvds->info->gen;
+ u32 lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
+ u32 lvdpllcr;
u32 lvdhcr;
int ret;
@@ -244,14 +192,47 @@ static void rcar_lvds_enable(struct drm_
else
lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
| LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
-
rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
- /* Perform generation-specific initialization. */
- if (lvds->info->gen < 3)
- rcar_lvds_enable_gen2(lvds);
+ /* PLL clock configuration */
+ if (gen < 3)
+ lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
else
- rcar_lvds_enable_gen3(lvds);
+ lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
+ rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
+
+ /* 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 (gen < 3) {
+ /*
+ * Select the input, enable LVDS operation, and turn
+ * the bias circuitry on.
+ */
+ lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
+ if (drm_crtc_index(crtc) == 2)
+ lvdcr0 |= LVDCR0_DUSEL;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ }
+
+ /* Turn the PLL on. */
+ lvdcr0 |= LVDCR0_PLLON;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ if (gen > 2) {
+ /* Turn on the 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);
if (lvds->panel) {
drm_panel_prepare(lvds->panel);
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