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Message-Id: <20230509074818.4399-1-wsa+renesas@sang-engineering.com>
Date: Tue, 9 May 2023 09:48:17 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-renesas-soc@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] drm: rcar-du: remove R-Car H3 ES1.* workarounds
R-Car H3 ES1.* was only available to an internal development group and
needed a lot of quirks and workarounds. These become a maintenance
burden now, so our development group decided to remove upstream support
for this SoC and prevent booting it. Public users only have ES2 onwards.
Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
---
This is the last ES1 bit remaining, would be awesome if it could go
soon.
Changes since v1:
* rebased to 6.4-rc1 (no code updates needed)
* added Kieran's tag (thanks!)
* mention in commit message that ES1 doesn't even boot anymore
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 37 ++------------------
drivers/gpu/drm/rcar-du/rcar_du_drv.c | 48 --------------------------
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 --
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 3 +-
4 files changed, 4 insertions(+), 86 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index d6d29be6b4f4..7e175dbfd892 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -223,20 +223,6 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
* DU channels that have a display PLL can't use the internal
* system clock, and have no internal clock divider.
*/
-
- /*
- * The H3 ES1.x exhibits dot clock duty cycle stability issues.
- * We can work around them by configuring the DPLL to twice the
- * desired frequency, coupled with a /2 post-divider. Restrict
- * the workaround to H3 ES1.x as ES2.0 and all other SoCs have
- * no post-divider when a display PLL is present (as shown by
- * the workaround breaking HDMI output on M3-W during testing).
- */
- if (rcdu->info->quirks & RCAR_DU_QUIRK_H3_ES1_PCLK_STABILITY) {
- target *= 2;
- div = 1;
- }
-
extclk = clk_get_rate(rcrtc->extclock);
rcar_du_dpll_divider(rcrtc, &dpll, extclk, target);
@@ -245,30 +231,13 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
| DPLLCR_N(dpll.n) | DPLLCR_M(dpll.m)
| DPLLCR_STBY;
- if (rcrtc->index == 1) {
+ if (rcrtc->index == 1)
dpllcr |= DPLLCR_PLCS1
| DPLLCR_INCS_DOTCLKIN1;
- } else {
- dpllcr |= DPLLCR_PLCS0_PLL
+ else
+ dpllcr |= DPLLCR_PLCS0
| DPLLCR_INCS_DOTCLKIN0;
- /*
- * On ES2.x we have a single mux controlled via bit 21,
- * which selects between DCLKIN source (bit 21 = 0) and
- * a PLL source (bit 21 = 1), where the PLL is always
- * PLL1.
- *
- * On ES1.x we have an additional mux, controlled
- * via bit 20, for choosing between PLL0 (bit 20 = 0)
- * and PLL1 (bit 20 = 1). We always want to use PLL1,
- * so on ES1.x, in addition to setting bit 21, we need
- * to set the bit 20.
- */
-
- if (rcdu->info->quirks & RCAR_DU_QUIRK_H3_ES1_PLL)
- dpllcr |= DPLLCR_PLCS0_H3ES1X_PLL1;
- }
-
rcar_du_group_write(rcrtc->group, DPLLCR, dpllcr);
escr = ESCR_DCLKSEL_DCLKIN | div;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index b9a94c5260e9..1ffde19cb87f 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -16,7 +16,6 @@
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
-#include <linux/sys_soc.h>
#include <linux/wait.h>
#include <drm/drm_atomic_helper.h>
@@ -387,43 +386,6 @@ static const struct rcar_du_device_info rcar_du_r8a7795_info = {
.dpll_mask = BIT(2) | BIT(1),
};
-static const struct rcar_du_device_info rcar_du_r8a7795_es1_info = {
- .gen = 3,
- .features = RCAR_DU_FEATURE_CRTC_IRQ
- | RCAR_DU_FEATURE_CRTC_CLOCK
- | RCAR_DU_FEATURE_VSP1_SOURCE
- | RCAR_DU_FEATURE_INTERLACED
- | RCAR_DU_FEATURE_TVM_SYNC,
- .quirks = RCAR_DU_QUIRK_H3_ES1_PCLK_STABILITY
- | RCAR_DU_QUIRK_H3_ES1_PLL,
- .channels_mask = BIT(3) | BIT(2) | BIT(1) | BIT(0),
- .routes = {
- /*
- * R8A7795 has one RGB output, two HDMI outputs and one
- * LVDS output.
- */
- [RCAR_DU_OUTPUT_DPAD0] = {
- .possible_crtcs = BIT(3),
- .port = 0,
- },
- [RCAR_DU_OUTPUT_HDMI0] = {
- .possible_crtcs = BIT(1),
- .port = 1,
- },
- [RCAR_DU_OUTPUT_HDMI1] = {
- .possible_crtcs = BIT(2),
- .port = 2,
- },
- [RCAR_DU_OUTPUT_LVDS0] = {
- .possible_crtcs = BIT(0),
- .port = 3,
- },
- },
- .num_lvds = 1,
- .num_rpf = 5,
- .dpll_mask = BIT(2) | BIT(1),
-};
-
static const struct rcar_du_device_info rcar_du_r8a7796_info = {
.gen = 3,
.features = RCAR_DU_FEATURE_CRTC_IRQ
@@ -614,11 +576,6 @@ static const struct of_device_id rcar_du_of_table[] = {
MODULE_DEVICE_TABLE(of, rcar_du_of_table);
-static const struct soc_device_attribute rcar_du_soc_table[] = {
- { .soc_id = "r8a7795", .revision = "ES1.*", .data = &rcar_du_r8a7795_es1_info },
- { /* sentinel */ }
-};
-
const char *rcar_du_output_name(enum rcar_du_output output)
{
static const char * const names[] = {
@@ -707,7 +664,6 @@ static void rcar_du_shutdown(struct platform_device *pdev)
static int rcar_du_probe(struct platform_device *pdev)
{
- const struct soc_device_attribute *soc_attr;
struct rcar_du_device *rcdu;
unsigned int mask;
int ret;
@@ -725,10 +681,6 @@ static int rcar_du_probe(struct platform_device *pdev)
rcdu->info = of_device_get_match_data(rcdu->dev);
- soc_attr = soc_device_match(rcar_du_soc_table);
- if (soc_attr)
- rcdu->info = soc_attr->data;
-
platform_set_drvdata(pdev, rcdu);
/* I/O resources */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index acc3673fefe1..5cfa2bb7ad93 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -34,8 +34,6 @@ struct rcar_du_device;
#define RCAR_DU_FEATURE_NO_BLENDING BIT(5) /* PnMR.SPIM does not have ALP nor EOR bits */
#define RCAR_DU_QUIRK_ALIGN_128B BIT(0) /* Align pitches to 128 bytes */
-#define RCAR_DU_QUIRK_H3_ES1_PCLK_STABILITY BIT(1) /* H3 ES1 has pclk stability issue */
-#define RCAR_DU_QUIRK_H3_ES1_PLL BIT(2) /* H3 ES1 PLL setup differs from non-ES1 */
enum rcar_du_output {
RCAR_DU_OUTPUT_DPAD0,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
index 6c750fab6ebb..391de6661d8b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
@@ -283,8 +283,7 @@
#define DPLLCR 0x20044
#define DPLLCR_CODE (0x95 << 24)
#define DPLLCR_PLCS1 (1 << 23)
-#define DPLLCR_PLCS0_PLL (1 << 21)
-#define DPLLCR_PLCS0_H3ES1X_PLL1 (1 << 20)
+#define DPLLCR_PLCS0 (1 << 21)
#define DPLLCR_CLKE (1 << 18)
#define DPLLCR_FDPLL(n) ((n) << 12)
#define DPLLCR_N(n) ((n) << 5)
--
2.30.2
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