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Message-Id: <20230727215141.53910-5-avolmat@me.com>
Date: Thu, 27 Jul 2023 21:51:28 +0000
From: Alain Volmat <avolmat@...com>
To: Alain Volmat <alain.volmat@...s.st.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>
Cc: Alain Volmat <avolmat@...com>, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 04/14] drm/sti: add STih418 platform support in sti mixer
On the STiH418, since there are more planes attached to the
mixer, the bit field for each depth of is now coded using 4 bits
instead of 3 bits. Some registers as well differ between STiH407
and STiH418 leading on relying on the st,stih418-compositor compatible
to distinguish proper behavior.
Signed-off-by: Alain Volmat <avolmat@...com>
---
drivers/gpu/drm/sti/sti_mixer.c | 71 ++++++++++++++++++++++++++-------
1 file changed, 57 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c
index 7e5f14646625..9cd780403d7b 100644
--- a/drivers/gpu/drm/sti/sti_mixer.c
+++ b/drivers/gpu/drm/sti/sti_mixer.c
@@ -7,6 +7,7 @@
*/
#include <linux/moduleparam.h>
+#include <linux/of.h>
#include <linux/seq_file.h>
#include <drm/drm_print.h>
@@ -23,10 +24,12 @@ module_param_named(bkgcolor, bkg_color, int, 0644);
/* regs offset */
#define GAM_MIXER_CTL 0x00
#define GAM_MIXER_BKC 0x04
+#define GAM_MIXER_OFF 0x08 /* Only for STiH418 */
#define GAM_MIXER_BCO 0x0C
#define GAM_MIXER_BCS 0x10
#define GAM_MIXER_AVO 0x28
#define GAM_MIXER_AVS 0x2C
+#define GAM_MIXER_CRB2 0x30 /* Only for STiH418 */
#define GAM_MIXER_CRB 0x34
#define GAM_MIXER_ACT 0x38
#define GAM_MIXER_MBP 0x3C
@@ -102,13 +105,22 @@ static void mixer_dbg_ctl(struct seq_file *s, int val)
seq_puts(s, "Nothing");
}
-static void mixer_dbg_crb(struct seq_file *s, int val)
+static void mixer_dbg_crb(struct seq_file *s, struct sti_mixer *mixer, u64 val)
{
int i;
+ u32 shift, mask_id;
+
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor")) {
+ shift = 4;
+ mask_id = 0x0f;
+ } else {
+ shift = 3;
+ mask_id = 0x07;
+ }
seq_puts(s, "\tDepth: ");
for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
- switch (val & GAM_DEPTH_MASK_ID) {
+ switch (val & mask_id) {
case GAM_DEPTH_VID0_ID:
seq_puts(s, "VID0");
break;
@@ -133,7 +145,7 @@ static void mixer_dbg_crb(struct seq_file *s, int val)
if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1)
seq_puts(s, " < ");
- val = val >> 3;
+ val = val >> shift;
}
}
@@ -149,6 +161,7 @@ static int mixer_dbg_show(struct seq_file *s, void *arg)
{
struct drm_info_node *node = s->private;
struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data;
+ u64 val;
seq_printf(s, "%s: (vaddr = 0x%p)",
sti_mixer_to_str(mixer), mixer->regs);
@@ -161,11 +174,18 @@ static int mixer_dbg_show(struct seq_file *s, void *arg)
DBGFS_DUMP(GAM_MIXER_AVO);
DBGFS_DUMP(GAM_MIXER_AVS);
DBGFS_DUMP(GAM_MIXER_CRB);
- mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
+ val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor")) {
+ DBGFS_DUMP(GAM_MIXER_CRB2);
+ val |= ((u64)sti_mixer_reg_read(mixer, GAM_MIXER_CRB2) << 32);
+ }
+ mixer_dbg_crb(s, mixer, val);
DBGFS_DUMP(GAM_MIXER_ACT);
- DBGFS_DUMP(GAM_MIXER_MBP);
- DBGFS_DUMP(GAM_MIXER_MX0);
- mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih407-compositor")) {
+ DBGFS_DUMP(GAM_MIXER_MBP);
+ DBGFS_DUMP(GAM_MIXER_MX0);
+ mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
+ }
seq_putc(s, '\n');
return 0;
}
@@ -238,7 +258,16 @@ int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane)
{
int plane_id, depth = plane->drm_plane.state->normalized_zpos;
unsigned int i;
- u32 mask, val;
+ u64 mask, val;
+ u32 shift, mask_id;
+
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor")) {
+ shift = 4;
+ mask_id = 0x0f;
+ } else {
+ shift = 3;
+ mask_id = 0x07;
+ }
switch (plane->desc) {
case STI_GDP_0:
@@ -266,26 +295,37 @@ int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane)
/* Search if a previous depth was already assigned to the plane */
val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor"))
+ val |= ((u64)sti_mixer_reg_read(mixer, GAM_MIXER_CRB2) << 32);
for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
- mask = GAM_DEPTH_MASK_ID << (3 * i);
- if ((val & mask) == plane_id << (3 * i))
+ mask = mask_id << (shift * i);
+ if ((val & mask) == plane_id << (shift * i))
break;
}
- mask |= GAM_DEPTH_MASK_ID << (3 * depth);
- plane_id = plane_id << (3 * depth);
+ mask |= mask_id << (shift * depth);
+ plane_id = plane_id << (shift * depth);
DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer),
sti_plane_to_str(plane), depth);
dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n",
- plane_id, mask);
+ plane_id, (u32)(mask & 0xffffffff));
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor"))
+ dev_dbg(mixer->dev, "GAM_MIXER_CRB2 val 0x%x mask 0x%x\n",
+ plane_id, (u32)(mask >> 32));
val &= ~mask;
val |= plane_id;
- sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val);
+ sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val & 0xffffffff);
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor"))
+ sti_mixer_reg_write(mixer, GAM_MIXER_CRB2, val >> 32);
dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n",
sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor"))
+ dev_dbg(mixer->dev, "Read GAM_MIXER_CRB2 0x%x\n",
+ sti_mixer_reg_read(mixer, GAM_MIXER_CRB2));
+
return 0;
}
@@ -352,6 +392,9 @@ int sti_mixer_set_plane_status(struct sti_mixer *mixer,
val |= status ? mask : 0;
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
+ if (of_device_is_compatible(mixer->dev->of_node, "st,stih418-compositor"))
+ sti_mixer_reg_write(mixer, GAM_MIXER_OFF, 0x02);
+
return 0;
}
--
2.34.1
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