On Sat, Sep 21, 2019 at 02:40:03AM +0300, Laurent Pinchart wrote:

On Tue, Sep 17, 2019 at 08:23:53AM +0200, Geert Uytterhoeven wrote:

...

Commit 5cca30ebe089be23 ("drm/rcar-du: Add LVDS_LANES quirk") states that LVDS lanes 1 and 3 are inverted on R-Car H2 ES1 only, and that the problem has been fixed in newer revisions.

However, the code didn't take into account the actual hardware revision, thus applying the quirk also on newer hardware revisions, causing green color reversals.

Oops :-S

...

Fix this by applying the quirk when running on R-Car H2 ES1.x only.

Reported-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com Fixes: c6a27fa41fabb35f ("drm: rcar-du: Convert LVDS encoder code to bridge driver")

Shouldn't this be

Fixes: 5cca30ebe089be23 ("drm/rcar-du: Add LVDS_LANES quirk")

...

Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Tested-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com

---

Does anyone know if this was fixed in ES2.0, or in any earlier ES1.x?

Or if there's any ES1.x other than ES1.0 ? :-)

...

While the issue was present before aforementioned commit, I do not think there is a real need to fix the older code variant, as the new LVDS encoder was backported to v4.14-ltsi.

Probably not, but I think there's still value in pointing to the right erroneous commit. It's a Fixes: tag, not a Backport-up-to: tag :-)

...

---

drivers/gpu/drm/rcar-du/rcar_lvds.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c index 3fc7e6899cab5843..50c11a7f0467f746 100644 --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c @@ -16,6 +16,7 @@ #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/slab.h> +#include <linux/sys_soc.h>

#include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> @@ -842,8 +843,23 @@ static int rcar_lvds_get_clocks(struct rcar_lvds *lvds) return 0; }

+static const struct rcar_lvds_device_info rcar_lvds_r8a7790es1_info = {

• .gen = 2,
• .quirks = RCAR_LVDS_QUIRK_LANES,
• .pll_setup = rcar_lvds_pll_setup_gen2,

+};

+static const struct soc_device_attribute lvds_quirk_matches[] = {

• {

• .soc_id = "r8a7790", .revision = "ES1.*",
  

Do you mind splitting this in two lines ?

Actually, it could be argued that having both on the same line is more readable. I'll let you decide what you like best.

With these small issues fixes,

Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com

Please let me know if I should fix while applying or if you want to send a new version.

...

• .data = &rcar_lvds_r8a7790es1_info,
  

• },
• { /* sentinel */ }

+};

static int rcar_lvds_probe(struct platform_device *pdev) {

• const struct soc_device_attribute *attr; struct rcar_lvds *lvds; struct resource *mem; int ret;

@@ -857,6 +873,10 @@ static int rcar_lvds_probe(struct platform_device *pdev) lvds->dev = &pdev->dev; lvds->info = of_device_get_match_data(&pdev->dev);

• attr = soc_device_match(lvds_quirk_matches);
• if (attr)

• lvds->info = attr->data;
  

• ret = rcar_lvds_parse_dt(lvds); if (ret < 0) return ret;

@@ -893,12 +913,6 @@ static const struct rcar_lvds_device_info rcar_lvds_gen2_info = { .pll_setup = rcar_lvds_pll_setup_gen2, };

-static const struct rcar_lvds_device_info rcar_lvds_r8a7790_info = {

• .gen = 2,
• .quirks = RCAR_LVDS_QUIRK_LANES,
• .pll_setup = rcar_lvds_pll_setup_gen2,

-};

static const struct rcar_lvds_device_info rcar_lvds_gen3_info = { .gen = 3, .quirks = RCAR_LVDS_QUIRK_PWD, @@ -930,7 +944,7 @@ static const struct of_device_id rcar_lvds_of_table[] = { { .compatible = "renesas,r8a7744-lvds", .data = &rcar_lvds_gen2_info }, { .compatible = "renesas,r8a774a1-lvds", .data = &rcar_lvds_gen3_info }, { .compatible = "renesas,r8a774c0-lvds", .data = &rcar_lvds_r8a77990_info },

• { .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_r8a7790_info },

• { .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_gen2_info }, { .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info }, { .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info }, { .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },

-- Regards,

Laurent Pinchart