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[92.34.215.146]) by smtp.gmail.com with ESMTPSA id f21sm2367558ljj.71.2020.12.05.04.22.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Dec 2020 04:22:38 -0800 (PST) From: Linus Walleij To: Thierry Reding , Sam Ravnborg , dri-devel@lists.freedesktop.org Subject: [PATCH] drm/panel: s6e63m0: Fix init sequence again Date: Sat, 5 Dec 2020 13:22:29 +0100 Message-Id: <20201205122229.1952980-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stephan Gerhold Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The DSI version of the panel behaved instable and close scrutiny of the vendor driver from the Samsung GT-S8190 shows a different initialization sequence for the DSI mode panel than the DPI mode panel. Make the initialization depend on whether we are in DSI or DPI mode and handle the differences. After this the panel on the GT-I8190 becomes much more stable. Also spell out some more custom DCS commands found in the vendor source code to cut down a bit on magic where we can. Cc: Stephan Gerhold Fixes: f0aee45ffc8b ("drm/panel: s6e63m0: Fix init sequence") Signed-off-by: Linus Walleij Reviewed-by: Sam Ravnborg --- drivers/gpu/drm/panel/panel-samsung-s6e63m0.c | 42 ++++++++++++++----- 1 file changed, 32 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c index 6b4e97bfd46e..bf6d704d4d27 100644 --- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c +++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c @@ -25,6 +25,14 @@ /* Manufacturer Command Set */ #define MCS_ELVSS_ON 0xb1 #define MCS_TEMP_SWIRE 0xb2 +#define MCS_PENTILE_1 0xb3 +#define MCS_PENTILE_2 0xb4 +#define MCS_GAMMA_DELTA_Y_RED 0xb5 +#define MCS_GAMMA_DELTA_X_RED 0xb6 +#define MCS_GAMMA_DELTA_Y_GREEN 0xb7 +#define MCS_GAMMA_DELTA_X_GREEN 0xb8 +#define MCS_GAMMA_DELTA_Y_BLUE 0xb9 +#define MCS_GAMMA_DELTA_X_BLUE 0xba #define MCS_MIECTL1 0xc0 #define MCS_BCMODE 0xc1 #define MCS_ERROR_CHECK 0xd5 @@ -281,6 +289,7 @@ struct s6e63m0 { struct backlight_device *bl_dev; u8 lcd_type; u8 elvss_pulse; + bool dsi_mode; struct regulator_bulk_data supplies[2]; struct gpio_desc *reset_gpio; @@ -395,9 +404,21 @@ static int s6e63m0_check_lcd_type(struct s6e63m0 *ctx) static void s6e63m0_init(struct s6e63m0 *ctx) { - s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL, - 0x01, 0x27, 0x27, 0x07, 0x07, 0x54, 0x9f, - 0x63, 0x8f, 0x1a, 0x33, 0x0d, 0x00, 0x00); + /* + * We do not know why there is a difference in the DSI mode. + * (No datasheet.) + * + * In the vendor driver this sequence is called + * "SEQ_PANEL_CONDITION_SET" or "DCS_CMD_SEQ_PANEL_COND_SET". + */ + if (ctx->dsi_mode) + s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL, + 0x01, 0x2c, 0x2c, 0x07, 0x07, 0x5f, 0xb3, + 0x6d, 0x97, 0x1d, 0x3a, 0x0f, 0x00, 0x00); + else + s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL, + 0x01, 0x27, 0x27, 0x07, 0x07, 0x54, 0x9f, + 0x63, 0x8f, 0x1a, 0x33, 0x0d, 0x00, 0x00); s6e63m0_dcs_write_seq_static(ctx, MCS_DISCTL, 0x02, 0x03, 0x1c, 0x10, 0x10); @@ -414,40 +435,40 @@ static void s6e63m0_init(struct s6e63m0 *ctx) s6e63m0_dcs_write_seq_static(ctx, MCS_SRCCTL, 0x00, 0x8e, 0x07); - s6e63m0_dcs_write_seq_static(ctx, 0xb3, 0x6c); + s6e63m0_dcs_write_seq_static(ctx, MCS_PENTILE_1, 0x6c); - s6e63m0_dcs_write_seq_static(ctx, 0xb5, + s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_RED, 0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, 0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, 0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a, 0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23, 0x21, 0x20, 0x1e, 0x1e); - s6e63m0_dcs_write_seq_static(ctx, 0xb6, + s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_RED, 0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66); - s6e63m0_dcs_write_seq_static(ctx, 0xb7, + s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_GREEN, 0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, 0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, 0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a, 0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23, 0x21, 0x20, 0x1e, 0x1e); - s6e63m0_dcs_write_seq_static(ctx, 0xb8, + s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_GREEN, 0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66); - s6e63m0_dcs_write_seq_static(ctx, 0xb9, + s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_BLUE, 0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, 0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, 0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a, 0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23, 0x21, 0x20, 0x1e, 0x1e); - s6e63m0_dcs_write_seq_static(ctx, 0xba, + s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_BLUE, 0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66); @@ -704,6 +725,7 @@ int s6e63m0_probe(struct device *dev, if (!ctx) return -ENOMEM; + ctx->dsi_mode = dsi_mode; ctx->dcs_read = dcs_read; ctx->dcs_write = dcs_write; dev_set_drvdata(dev, ctx);